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interpreter_test.go
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package prolog
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"os"
"regexp"
"testing"
"time"
"github.com/axone-protocol/prolog/v2/engine"
"github.com/stretchr/testify/assert"
)
func TestNew(t *testing.T) {
i := New(nil, nil)
assert.NotNil(t, i)
t.Run("number_chars", func(t *testing.T) {
// http://www.complang.tuwien.ac.at/ulrich/iso-prolog/number_chars
p := New(nil, nil)
// Section 0
assert.NoError(t, p.QuerySolution(`number_chars(1.2,['1',.,'2']).`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(1.0e9,['1',.,'0','E','9']).`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(1,['0','1']).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[a]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[[]]), error(type_error(character,[]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[' ',[]]), error(type_error(character,[]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[0]), error(type_error(character,0), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[_,[]]), error(type_error(character,[]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[X]), error(instantiation_error,_), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['0'|_]), error(instantiation_error,_), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,'1'), error(type_error(list,'1'), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[a|a]), error(type_error(list,[a|a]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[49]), error(type_error(character,49), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['3',' ']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['3',.]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,[' ','1']), N = 1.`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,['\n','1']), N = 1.`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,[' ','0','''',a]), N = 97.`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,[-,' ','1']), N = -1.`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,[/,*,*,/,'1']), N = 1.`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,['%','\n','1']), N = 1.`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[-,/,*,*,/,'1']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['1',e,'1']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['1',.,'0',e]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['1',.,'0',e,e]), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(N,['0',x,'1']), N = 1.`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['0','X','1']), error(syntax_error(_), _), true).`).Err())
assert.Error(t, p.QuerySolution(`catch(number_chars(1E1,_), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`\+number_chars(1,['.'|_]).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[+,'1']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[+,' ','1']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['''',+,'''','1']), error(syntax_error(_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['11']), error(type_error(character,_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,['1.1']), error(type_error(character,_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1+1,['2']), error(type_error(number,1+1), _), true).`).Err())
// Section 2
assert.NoError(t, p.QuerySolution(`number_chars(1,[C]), C = '1'.`).Err())
assert.NoError(t, p.QuerySolution(`\+number_chars(1,[C,D]).`).Err())
assert.NoError(t, p.QuerySolution(`\+number_chars(1,[C,C]).`).Err())
assert.NoError(t, p.QuerySolution(`\+number_chars(0,[C,C]).`).Err())
assert.NoError(t, p.QuerySolution(`number_chars(10,[C,D]), C = '1', D = '0'.`).Err())
assert.NoError(t, p.QuerySolution(`\+number_chars(100,[C,D]).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[X|2]), error(instantiation_error,_), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(N,[1|_]), error(type_error(character,1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(V,[1|2]), error(type_error(character,1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars([],1), error(type_error(list,1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,1), error(type_error(list,1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[a|2]), error(type_error(list,[a|2]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[_|2]), error(type_error(list,[_|2]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[[]|_]), error(type_error(character,[]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(number_chars(1,[[]|2]), error(type_error(character,[]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch((L=['1'|L], number_chars(N,L)), error(type_error(list,['1'|_]), _), L=['1'|L]).`).Err())
})
t.Run("length", func(t *testing.T) {
// http://www.complang.tuwien.ac.at/ulrich/iso-prolog/length_quad.pl
p := New(nil, nil)
var s struct {
L []interface{}
N int
}
sols, err := p.Query(`length(L,N).`)
assert.NoError(t, err)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 0)
assert.Equal(t, 0, s.N)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 1)
assert.Equal(t, 1, s.N)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 2)
assert.Equal(t, 2, s.N)
assert.NoError(t, sols.Close())
assert.NoError(t, p.QuerySolution(`length(L,0), L = [].`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`length([_|L],0).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`length(2,0).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`length([_|2],0).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`length([_|2],N).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`length([_|2],2).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,-1), error(domain_error(not_less_than_zero,-1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([],-1), error(domain_error(not_less_than_zero,-1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(a,-1), error(domain_error(not_less_than_zero,-1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([],-0.1), error(type_error(integer,-0.1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,-0.1), error(type_error(integer,-0.1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([a],1.0), error(type_error(integer,1.0), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,1.0), error(type_error(integer,1.0), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,1.1), error(type_error(integer,1.1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,1.0e99), error(type_error(integer,1.0e99), _), true).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`N is 2^52, length([], N).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([],0+0), error(type_error(integer,0+0), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([],-_), error(type_error(integer,-_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([a],-_), error(type_error(integer,-_), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length([a,b|X],X), error(resource_error(finite_memory), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(length(L,L), error(resource_error(finite_memory), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch((L = [_|_], length(L,L)), error(type_error(integer,[_|_]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch((L = [_], length(L,L)), error(type_error(integer,[_]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch((L = [1], length(L,L)), error(type_error(integer,[1]), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch((L = [a|L], length(L,N)), error(resource_error(finite_memory), _), true).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`L = [a|L], length(L,0).`).Err())
assert.Equal(t, ErrNoSolutions, p.QuerySolution(`L = [a|L], length(L,7).`).Err())
/* This library doesn't implement freeze/2
assert.NoError(t, p.QuerySolution(`freeze(L,L=[]), \+length(L,L).`).Err())
ctx, cancel = context.WithTimeout(context.Background(), 100*time.Millisecond)
assert.Equal(t, context.Canceled, p.QuerySolutionContext(ctx, `freeze(L,L=[_|L]), length(L,N).`).Err())
cancel()
assert.NoError(t, p.QuerySolution(`freeze(L,L=[_|L]), N is 2^64, \+length(L,N).`).Err())
*/
sols, err = p.Query(`length([a, b|L], N).`)
assert.NoError(t, err)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 0)
assert.Equal(t, 2, s.N)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 1)
assert.Equal(t, 3, s.N)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Len(t, s.L, 2)
assert.Equal(t, 4, s.N)
assert.NoError(t, sols.Close())
})
t.Run("call_nth", func(t *testing.T) {
var s struct {
N int
Nth int
}
p := New(nil, nil)
assert.NoError(t, p.QuerySolution(`call_nth(true, Nth), Nth = 1.`).Err())
sols, err := p.Query(`call_nth(repeat, Nth).`)
assert.NoError(t, err)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 1, s.Nth)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 2, s.Nth)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 3, s.Nth)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 4, s.Nth)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 5, s.Nth)
assert.NoError(t, sols.Close())
sols, err = p.Query(`call_nth(( N = 1 ; N = 2 ), Nth).`)
assert.NoError(t, err)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 1, s.N)
assert.Equal(t, 1, s.Nth)
assert.True(t, sols.Next())
assert.NoError(t, sols.Scan(&s))
assert.Equal(t, 2, s.N)
assert.Equal(t, 2, s.Nth)
assert.NoError(t, sols.Close())
assert.NoError(t, p.QuerySolution(`catch(call_nth(true, non_integer), error(type_error(integer,non_integer), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`catch(call_nth(true, 1.0), error(type_error(integer,1.0), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`\+call_nth(true, 0).`).Err())
assert.NoError(t, p.QuerySolution(`\+call_nth(repeat, 0).`).Err())
assert.NoError(t, p.QuerySolution(`catch(call_nth(repeat, -1), error(domain_error(not_less_than_zero,-1), _), true).`).Err())
assert.NoError(t, p.QuerySolution(`call_nth(length(L,N), 3), L = [_A,_B], N = 2.`).Err())
assert.NoError(t, p.QuerySolution(`\+call_nth(inex, 0).`).Err())
assert.NoError(t, p.QuerySolution(`\+call_nth(1, 0).`).Err())
assert.NoError(t, p.QuerySolution(`\+call_nth(V, 0).`).Err())
})
}
func TestNew_variableNames(t *testing.T) {
// http://www.complang.tuwien.ac.at/ulrich/iso-prolog/variable_names
// I wanted to put this under TestNew() as t.Run("variable_names", ...) but GoLand didn't recognize it as a table-driven test.
var out bytes.Buffer
p := New(nil, &out)
defer func() {
_ = os.Remove("f") // Some test cases open a file 'f'.
}()
tests := []struct {
name string
input string
query string
output string
outputFn func(t *testing.T, output string)
err error
waits bool
}{
{name: "1", query: `catch(write_term(T,[quoted(true), variable_names([N=T])]), error(instantiation_error, _), true).`},
{name: "2", query: `N = 'X', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `X`},
{name: "3", query: `catch((N = T, write_term(T,[quoted(true), variable_names([N=T])])), error(instantiation_error, _), true).`},
{name: "4", query: `N = '_', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `_`},
{name: "65", query: `N = '_/*.*/', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `_/*.*/`},
{name: "5", query: `N = x, write_term(T,[quoted(true), variable_names([N=T])]).`, output: `x`},
{name: "6", query: `N = 'x+y', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `x+y`},
{name: "50", query: `N = '))', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `))`},
{name: "7", query: `catch((N = 7, write_term(T,[quoted(true), variable_names([N=T])])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "8", query: `catch((N = 1+2, write_term(T,[quoted(true), variable_names([N=T])])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "9", query: `catch((N = '$VAR'(9), write_term(T,[quoted(true), variable_names([N=T])])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "10", query: `catch((T = a, write_term(T,[quoted(true), variable_names([N=T])])), error(instantiation_error, _), true).`},
{name: "11", query: `T = a, N = 'Any', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `a`},
{name: "12", query: `T = '$VAR'(9), N = '_', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `'$VAR'(9)`},
// {name: "28", query: `freeze(T,throw(g(T))), N = 'X', write_term(T,[quoted(true), variable_names([N=T])]).`, output: `'$VAR'(9)`}, This implementation doesn't support freeze/2.
{name: "13", query: `write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, outputFn: func(t *testing.T, output string) {
t.Helper()
assert.Regexp(t, regexp.MustCompile(`\A_\d+\z`), output)
}},
{name: "14", query: `T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, output: `X,Y,Z`},
{name: "15", query: `Z=Y, T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, output: `X,Y,Y`},
{name: "16", query: `Z=Y, Y=X, T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, output: `X,X,X`},
{name: "17", query: `T=(Y,Z), write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, output: `Y,Z`},
{name: "18", query: `T=(Z,Y), write_term(T,[quoted(true), variable_names(['X'=X,'Y'=Y,'Z'=Z])]).`, output: `Z,Y`},
{name: "19", query: `write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, outputFn: func(t *testing.T, output string) {
t.Helper()
assert.Regexp(t, regexp.MustCompile(`\A_\d+\z`), output)
}},
{name: "20", query: `T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, output: `X,Y,Z`},
{name: "21", query: `Z=Y, T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, output: `X,Z,Z`},
{name: "22", query: `Z=Y, Y=X, T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, output: `Z,Z,Z`},
{name: "23", query: `T=(Y,Z), write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, output: `Y,Z`},
{name: "24", query: `T=(Z,Y), write_term(T,[quoted(true), variable_names(['Z'=Z,'Y'=Y,'X'=X])]).`, output: `Z,Y`},
{name: "25", query: `write_term(T,[quoted(true), variable_names(['X'=Z,'X'=Y,'X'=X])]).`, outputFn: func(t *testing.T, output string) {
t.Helper()
assert.Regexp(t, regexp.MustCompile(`\A_\d+\z`), output)
}},
{name: "26", query: `T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['X'=Z,'X'=Y,'X'=X])]).`, output: `X,X,X`},
{name: "27", query: `T=(1,2,3), T=(X,Y,Z), write_term(T,[quoted(true), variable_names(['X'=Z,'X'=Y,'X'=X])]).`, output: `1,2,3`},
{name: "32", query: `read_term(T,[variable_names(VN_list)]), VN_list=[_=1,_=2,_=3], writeq(VN_list).`, err: context.DeadlineExceeded, waits: true},
{name: "29", input: `B+C+A+B+C+A.`, query: `read_term(T,[variable_names(VN_list)]), VN_list=[_=1,_=2,_=3], writeq(VN_list).`, output: `['B'=1,'C'=2,'A'=3]`},
{name: "30", query: `catch(write_term(T, [variable_names(VN_list)]), error(instantiation_error, _), true).`},
{name: "31", query: `catch((VN_list = 1, write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "33", query: `catch((VN_list = [[]], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "34", query: `catch((VN_list = non_list, write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "35", query: `catch((VN_list = [T='T'|non_list], write_term(T, [variable_names(VN_list)])), error(instantiation_error, _), true).`},
{name: "52", query: `catch((VN_list = ['T'=T|_], write_term(T, [variable_names(VN_list)])), error(instantiation_error, _), true).`},
{name: "51", query: `catch((VN_list = ['T'=T|non_list], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "36", query: `catch((VN_list = [T-'T'], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "63", query: `catch((VN_list = [_,a], write_term(T, [variable_names(VN_list)])), error(instantiation_error, _), true).`},
{name: "64", query: `catch((VN_list = [a,_], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "66", query: `catch((VN_list = [a|_], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names(_)), _), true).`},
{name: "67", query: `catch((VN_list = [i=i,7=i], write_term(T, [variable_names(VN_list)])), error(domain_error(write_option, variable_names([i=i,7=i])), _), true).`},
{name: "68", query: `catch((VN_list = [_,_], write_term(T, [variable_names(VN_list)])), error(instantiation_error, _), true).`},
{name: "43", query: `write_term(-X^2,[variable_names(['X'=X])]).`, output: `- (X^2)`},
{name: "44", query: `X=1, write_term(-X^2,[variable_names(['X'=X])]).`, output: `- (1^2)`},
{name: "37", query: `catch(open(f,write,_,[O]), error(instantiation_error, _), true).`},
{name: "38", query: `catch((O = 1, open(f,write,_,[O])), error(domain_error(stream_option, 1), _), true).`},
{name: "56", query: `catch((O = typex(_), open(f,write,_,[O])), error(domain_error(stream_option, typex(_)), _), true).`},
{name: "57", query: `catch((O = typex(1), open(f,write,_,[O])), error(domain_error(stream_option, typex(1)), _), true).`},
{name: "62", query: `catch((O = typex(s(_)), open(f,write,_,[O])), error(domain_error(stream_option, typex(s(_))), _), true).`},
{name: "39", query: `O = type(text), open(f,write,_,[O]).`},
{name: "40", query: `catch((O = type(1), open(f,write,_,[O])), error(domain_error(stream_option, type(1)), _), true).`},
{name: "41", query: `catch((O = type(_), open(f,write,_,[O])), error(instantiation_error, _), true).`},
{name: "60", query: `catch((O = alias(_), open(f,write,_,[O])), error(instantiation_error, _), true).`},
{name: "42", query: `catch((O = type(nontype), open(f,write,_,[O])), error(domain_error(stream_option, type(nontype)), _), true).`},
{name: "61", query: `catch((O = alias(1), open(f,write,_,[O])), error(domain_error(stream_option, alias(1)), _), true).`},
{name: "45", query: `read_term(T,[variable_names(VN_list)]).`, waits: true},
{name: "46", input: `a.`, query: `read_term(T,[variable_names(VN_list)]), T = a, VN_list = [].`},
{name: "47", query: `VN_list = 42, read_term(T,[variable_names(VN_list)]).`, waits: true},
{name: "48", input: `a.`, query: `VN_list = 42, \+read_term(T,[variable_names(VN_list)]).`},
{name: "49", input: `a b.`, query: `VN_list = 42, catch(read_term(T,[variable_names(VN_list)]), error(syntax_error(_), _), true).`},
{name: "53", query: `catch(write_term(S,[quoted(true), variable_names([N=T])]), error(instantiation_error, _), true).`},
{name: "54", query: `S=1+T,N='/*r*/V',write_term(S,[quoted(true), variable_names([N=T])]).`, output: `1+/*r*/V`},
{name: "55", query: `S=1+T,N=' /*r*/V',write_term(S,[quoted(true), variable_names([N=T])]).`, output: `1+ /*r*/V`},
{name: "58", query: `S=1+T,N=(+),write_term(S,[quoted(true), variable_names([N=T])]).`, output: `1++`},
{name: "59", query: `S=T+1,N=(+),write_term(S,[quoted(true), variable_names([N=T])]).`, output: `++1`},
{name: "73", query: `S=(1 is T),N='X',write_term(S,[quoted(true), variable_names([N=T])]).`, output: `1 is X`},
{name: "69", query: `read_term(T, [singletons(1)]).`, waits: true},
{name: "70", input: `a.`, query: `\+read_term(T, [singletons(1)]).`},
{name: "71", query: `write_term(T,[variable_names(['Bad'=T]),variable_names(['Good'=T])]).`, output: `Good`},
{name: "72", query: `read_term(T,[singletons([])]).`, waits: true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
defer cancel()
if tt.input == "" {
p.SetUserInput(engine.NewInputTextStream(readFn(func(p []byte) (n int, err error) {
<-ctx.Done()
return 0, io.EOF
})))
} else {
p.SetUserInput(engine.NewInputTextStream(bytes.NewBufferString(tt.input)))
}
out.Reset()
assert.Equal(t, tt.err, p.QuerySolutionContext(ctx, tt.query).Err())
if tt.outputFn == nil {
assert.Equal(t, tt.output, out.String())
} else {
tt.outputFn(t, out.String())
}
assert.Equal(t, tt.waits, errors.Is(ctx.Err(), context.DeadlineExceeded))
})
}
}
func TestNew_conformity(t *testing.T) {
// http://www.complang.tuwien.ac.at/ulrich/iso-prolog/conformity_testing
tests := []struct {
name string
premise string
input string
output string
err error
outputFn func(t *testing.T, output string)
}{
{name: "1", input: `writeq('\n').`, output: `'\n'`},
{name: "2", input: `'`, output: `syntax err.`},
{name: "3", input: `)`, output: `syntax err.`},
{name: "261", input: ")\n'", output: `syntax err.`},
{name: "4", input: `.`, output: `syntax err.`},
{name: "5", input: `writeq(' '). % horiz. tab`, output: `syntax err.`},
{name: "177", input: `0'\t=0' . % horiz. tab`, output: `syntax err.`},
{name: "6", input: `writeq('
').`, output: `syntax err.`},
{name: "7", input: `writeq('\
'). % "\\\n"`, output: `''`},
{name: "8", input: `writeq('\
a'). % "\\\na"`, output: `a`},
{name: "8", input: `writeq('\
a'). % "\\\na"`, output: `a`},
{name: "9", input: `writeq('a\
b'). % "a\\\nb"`, output: `ab`},
{name: "10", input: `writeq('a\
b'). % "a\\\n b"`, output: `'a b'`},
{name: "11", input: `writeq('\ ').`, output: `syntax err.`},
{name: "193", input: `writeq('\
'). % "\\ \n"`, output: `syntax err.`},
{name: "12", input: `writeq('\ '). % "\\\t"`, output: `syntax err.`},
{name: "13", input: `writeq('\t').`, output: `'\t'`},
{name: "14", input: `writeq('\a').`, output: `'\a'`},
{name: "15", input: `writeq('\7\').`, output: `'\a'`},
{name: "16", input: `writeq('\ca').`, output: `syntax err.`},
{name: "241", input: `writeq('\d').`, output: `syntax err.`},
{name: "17", input: `writeq('\e').`, output: `syntax err.`},
{name: "18", input: `writeq('\033\').`, output: `'\x1b\'`},
{name: "301", input: `writeq('\0\').`, output: `'\x0\'`},
{name: "19", input: `char_code('\e',C).`, output: `syntax err.`},
{name: "21", input: `char_code('\d',C).`, output: `syntax err.`},
{name: "22", input: `writeq('\u1').`, output: `syntax err.`},
{name: "23", input: `X = 0'\u1.`, output: `syntax err.`},
{name: "24", input: `writeq('`, output: `syntax err.`},
{name: "25", input: `writeq(.`, output: `syntax err.`},
{name: "26", input: `'\
''.`, output: `syntax err.`},
{name: "210", input: `X = 0'\.`, output: `syntax err.`},
{name: "211", input: `X = 0'\. .`, output: `syntax err.`},
{name: "222", input: `writeq((-)-(-)).`, output: `(-)-(-)`},
{name: "223", input: `writeq(((:-):-(:-))).`, output: `(:-):-(:-)`},
{name: "27", input: `writeq((*)=(*)).`, output: `(*)=(*)`},
{name: "28", input: `writeq([:-,-]).`, output: `[:-,-]`},
{name: "29", input: `writeq(f(*)).`, output: `f(*)`},
{name: "30", input: `writeq(a*(b+c)).`, output: `a*(b+c)`},
{name: "31", input: `writeq(f(;,'|',';;')).`, output: `f(;,'|',';;')`},
{name: "32", input: `writeq([.,.(.,.,.)]).`, output: `['.','.'('.','.','.')]`},
{name: "33", input: `writeq((a :- b,c)).`, output: `a:-b,c`},
{name: "34", input: `write_canonical([a]).`, output: `'.'(a,[])`},
{name: "35", input: `writeq('/*').`, output: `'/*'`},
{name: "203", input: `writeq(//*).`, output: `//*`},
{name: "282", input: `writeq(//*.*/).`, output: `//*.*/`},
{name: "36", input: `writeq('/**').`, output: `'/**'`},
{name: "37", input: `writeq('*/').`, output: `*/`},
{name: "38", input: "\"\\'\\`\\\"\" = \"'`\"\"\". % \""}, // "\'\`\"" = "'`""". % "
{name: "179", input: "\"\\'\\\"\" = \"'\"\"\". % \""}, // "\'\"" = "'""". % "
{name: "178", input: "\"\\`\" = \"`\"."}, // "\`" = "`".
{name: "39", input: "'\\'\\`\\\"' = '''`\\\"'."}, // '\'\`\"' = '''`"'.
{name: "40", input: "writeq('\\'\\`\\\"\\\"').", output: "'\\'`\"\"'"}, // writeq('\'\`\"\"'). ==> '\'`""'
{name: "41", input: `('\\') = (\).`},
{name: "42", premise: `op(1,xf,xf1).`, input: `1xf1 = xf1(1).`},
{name: "43", input: `X = 0X1.`, output: `syntax err.`},
{name: "44", input: `float(.0).`, output: `syntax err.`},
{name: "45", premise: `op(100,xfx,.).`, input: `functor(3 .2,F,A), F = ('.'), A = 2.`},
{name: "46", input: `float(- .0).`, output: `syntax err.`},
{name: "47", input: `float(1E9).`, output: `syntax err.`},
{name: "48", input: `integer(1e).`, output: `syntax err.`},
{name: "49", premise: `op(9,xf,e9).`, input: `1e9 = e9(1).`},
{name: "50", premise: `op(9,xf,e).`, input: `1e-9 = -(e(1),9).`},
{name: "51", premise: `op(9,xf,e).`, input: `1.0e- 9 = -(e(1.0),9).`},
{name: "204", premise: `op(9,xf,e).`, input: `writeq(1e).`, output: `1 e`},
{name: "220", premise: `op(9,xf,e).`, input: `writeq(1.0e).`, output: `1.0 e`},
{name: "52", premise: `op(9,xfy,e).`, input: `1.2e 3 = e(X,Y), X = 1.2, Y = 3.`},
{name: "53", input: `writeq(1.0e100).`, output: `1.0e+100`},
{name: "54", input: `float(1.0ee9).`, output: `syntax err.`},
{name: "286", input: `(- (1)) = -(1).`},
{name: "287", input: `(- -1) = -(-1).`},
{name: "288", input: `(- 1^2) = ^(-1,2).`},
{name: "56", input: `integer(- 1).`},
{name: "57", input: `integer('-'1).`},
{name: "58", input: `integer('-' 1).`},
{name: "59", input: `integer(- /*.*/1).`},
{name: "60", input: `integer(-/*.*/1).`, output: `syntax err.`},
{name: "61", input: `integer('-'/*.*/1).`},
{name: "62", input: `atom(-/*.*/-).`},
{name: "63", input: `op(0,fy,-).`},
{name: "180", premise: `op(0,fy,-).`, input: `integer(-1).`},
{name: "64", premise: `op(0,fy,-).`, input: `integer(- 1).`},
{name: "135", input: `writeq(-(1)).`, output: `- (1)`},
{name: "136", input: `op(0,fy,-),writeq(-(1)).`, output: `-(1)`},
{name: "182", input: `writeq(-(-1)).`, output: `- -1`},
{name: "183", input: `writeq(-(1^2)).`, output: `- (1^2)`},
{name: "260", input: `writeq(-(a^2)).`, output: `- (a^2)`},
{name: "139", input: `writeq(-((a,b))).`, output: `- (a,b)`},
{name: "218", input: `writeq(-(1*2)).`, output: `- (1*2)`},
{name: "140", input: `writeq(-a).`, output: `-a`},
{name: "184", input: `writeq(-(-)).`, output: `- (-)`},
{name: "185", input: `writeq(-[-]).`, output: `-[-]`},
{name: "188", input: `writeq(-p(c)).`, output: `-p(c)`},
{name: "189", input: `writeq(-{}).`, output: `-{}`},
{name: "190", input: `writeq(-{a}).`, output: `-{a}`},
{name: "191", input: `writeq(-(-a)).`, output: `- -a`},
{name: "192", input: `writeq(-(-(-a))).`, output: `- - -a`},
{name: "216", input: `writeq(-(-(1))).`, output: `- - (1)`},
{name: "215", premise: `op(100,yfx,~).`, input: `writeq(-(1~2~3)).`, output: `- (1~2~3)`},
{name: "248", premise: `op(100,yfx,~).`, input: `writeq(- (1~2)).`, output: `- (1~2)`},
{name: "249", premise: `op(100,yfx,~).`, input: `writeq(1~2).`, output: `1~2`},
{name: "278", input: `op(9,xfy,.), writeq(-[1]).`, output: `-[1]`},
{name: "279", input: `op(9,xf,'$VAR'), writeq(- '$VAR'(0)).`, output: `-A`},
{name: "296", premise: `op(9,xf,'$VAR').`, input: `writeq('$VAR'(0)).`, output: `A`},
{name: "55", premise: `op(1,yf,yf1).`, input: `{-1 yf1}={yf1(X)}, X = -1.`},
{name: "65", input: `compound(+1).`},
{name: "66", input: `compound(+ 1).`},
{name: "277", input: `writeq(+1^2).`, output: `+1^2`},
{name: "67", premise: `op(0,fy,+).`, input: `compound(+1).`, output: `syntax err.`},
{name: "257", input: `writeq([+{a},+[]]).`, output: `[+{a},+[]]`},
{name: "68", input: `[(:-)|(:-)]=[:-|:-].`},
{name: "69", input: `X=[a|b,c].`, output: `syntax err.`},
{name: "70", input: `op(1000,xfy,',').`, output: `permission_error(modify,operator,',')`},
{name: "71", input: `op(1001,xfy,',').`, output: `permission_error(modify,operator,',')`},
{name: "72", input: `op(999,xfy,'|').`, output: `permission_error(modify,operator,'|')`},
{name: "73", input: `X=[a|b].`},
{name: "285", premise: `op(0,xfy,'|').`, input: `X=[(a|b)].`, output: `syntax err.`},
{name: "219", input: `[a|[]]=[a].`},
{name: "74", input: `X=[a|b|c].`, output: `syntax err.`},
{name: "75", input: `var(a:-b).`, output: `syntax err.`},
{name: "76", input: `:- = :- .`, output: `syntax err.`},
{name: "77", input: `- = - .`, output: `syntax err.`},
{name: "78", input: `* = * .`, output: `syntax err.`},
{name: "79", input: `current_op(200,fy,-).`},
{name: "80", input: `current_op(200,fy,+).`},
{name: "81", input: `{- - c}={-(-(c))}.`},
{name: "82", input: `(- -) = -(-).`, output: `syntax err.`},
{name: "83", input: `(- - -) = -(-(-)).`, output: `syntax err.`},
{name: "84", input: `(- - - -) = -(-(-(-))).`, output: `syntax err.`},
{name: "85", input: `{:- :- c} = {:-(:-,c)}.`, output: `syntax err.`},
{name: "86", input: `{- = - 1}={(-(=)) - 1}.`, output: `syntax err.`},
{name: "87", input: `write_canonical((- = - 1)).`, output: `syntax err.`},
{name: "88", input: `write_canonical((- = -1)).`, output: `syntax err.`},
{name: "89", input: `write_canonical((-;)).`, output: `syntax err.`},
{name: "90", input: `write_canonical((-;-)).`, output: `syntax err.`},
{name: "91", input: `write_canonical((:-;-)).`, output: `syntax err.`},
{name: "92", input: `[:- -c] = [(:- -c)].`, output: `syntax err.`},
{name: "93", input: `writeq([a,b|,]).`, output: `syntax err.`},
{name: "94", input: `X ={,}.`, output: `syntax err.`},
{name: "95", input: `{1} = {}(1).`},
{name: "96", input: `write_canonical({1}).`, output: `{}(1)`},
{name: "97", input: `'[]'(1) = [ ](X), X = 1.`},
{name: "98", input: `X = [] (1).`, output: `syntax err.`},
{name: "99", input: `op(100,yfy,op).`, output: `domain_error(operator_specifier,yfy)`},
{name: "100", input: `'''' = '\''.`},
{name: "101", input: `a = '\141\'.`},
{name: "102", input: `a = '\141'.`, output: `syntax err.`},
{name: "103", input: `X = '\141\141', X = a141.`},
{name: "104", input: `X = '\9'.`, output: `syntax err.`},
{name: "105", input: `X = '\N'.`, output: `syntax err.`},
{name: "106", input: `X = '\\' .`, output: `syntax err.`},
{name: "107", input: `X = '\77777777777\'.`, output: `syntax err.`},
{name: "108", input: `a = '\x61\'.`},
{name: "109", input: `atom_codes('\xG\',Cs).`, output: `syntax err.`},
{name: "110", input: `atom_codes('\xG1\',Cs).`, output: `syntax err.`},
{name: "111", input: "atom(`).", output: `syntax err.`},
{name: "112", input: "atom(`+).", output: `syntax err.`},
{name: "297", input: "atom(`\n`).", output: `syntax err.`},
{name: "113", input: "X = `a`.", output: `syntax err.`},
{name: "114", input: `integer(0'\').`},
{name: "115", input: `integer(0''').`},
{name: "116", input: `0''' = 0'\'.`},
{name: "117", input: `integer(0'').`, output: `syntax err.`},
{name: "195", input: `op(100,xf,'').`},
{name: "205", premise: `op(100,xf,'').`, input: `(0 '') = ''(X), X = 0.`},
{name: "196", premise: `op(100,xf,'').`, input: `writeq(0 '').`, output: `0 ''`},
{name: "197", premise: `op(100,xf,'').`, input: `writeq(0'').`, output: `0 ''`},
{name: "118", input: `op(100,xfx,'').`},
{name: "119", premise: `op(100,xfx,'').`, input: `functor(0 ''1, F, A), F = (''), A = 2.`},
{name: "120", premise: `op(100,xfx,'').`, input: `functor(0''1, F, A), F = (''), A = 2.`},
{name: "206", premise: `op(100,xf,f).`, input: `writeq(0'f').`, output: `syntax err.`},
{name: "207", premise: `op(100,xf,f).`, input: `writeq(0'f'f').`, output: `102 f`},
{name: "209", premise: `op(100,xf,f).`, input: `writeq(0'ff).`, output: `102 f`},
{name: "256", premise: `op(100,xf,f).`, input: `writeq(0f).`, output: `0 f`},
{name: "208", premise: `op(100,xf,'f ').`, input: `writeq(0 'f ').`, output: `0 'f '`},
{name: "121", input: `X = 2'1.`, output: `syntax err.`},
{name: "122", premise: `op(100,xfx,'1').`, input: `functor(2'1'y, F, A), F = ('1'), A = 2.`},
{name: "262", premise: `op(100,xfx,'1').`, input: `functor(2 '1'y, F, A), F = ('1'), A = 2.`},
{name: "123", input: `X =0'\x41\ , X = 65.`},
{name: "124", input: `X =0'\x41\, X = 65.`},
{name: "125", input: `X =0'\x1\, X = 1.`},
{name: "127", input: `X is 16'mod'2, X = 0.`},
{name: "128", input: `X is 37'mod'2, X = 1.`},
{name: "129", input: `X is 0'mod'1.`, output: `syntax err.`},
{name: "130", input: `X is 1'+'1, X = 2.`},
{name: "212", input: `X is 1'\
+'1, X = 2.`},
{name: "213", input: `X is 0'\
+'1, X = 1.`},
{name: "259", input: `X = 0'\
+'/*'. %*/1, X = 0+1.`},
{name: "303", input: `X = 0'\
a.`, output: `syntax err.`},
{name: "214", input: `X is 0'\`, output: `syntax err.`}, // TODO: waits
{name: "126", input: `X = 0'\
.\`, output: `syntax err.`}, // TODO: waits
{name: "131", input: `op(100,fx,' op').`},
{name: "132", premise: `op(100,fx,' op').`, input: `writeq(' op' '1').`, output: `' op' '1'`},
{name: "133", premise: `op(100,fx,' op').`, input: `writeq(' op'[]).`, output: `' op'[]`},
{name: "134", premise: `op(1,xf,xf1).`, input: `writeq({- =xf1}).`, output: `syntax err.`},
{name: "137", input: `writeq(- (a*b)).`, output: `- (a*b)`},
{name: "138", input: `writeq(\ (a*b)).`, output: `\ (a*b)`},
{name: "141", input: `current_op(P,xfy,.).`, output: `fails`},
{name: "142", input: `op(100,xfy,.).`},
{name: "143", premise: `op(100,xfy,.).`, input: `writeq(1 .2).`, output: `[1|2]`},
{name: "144", premise: `op(100,xfy,.).`, input: `writeq([1]).`, output: `[1]`},
{name: "283", premise: `op(100,xfy,.).`, input: `writeq(-[1]).`, output: `-[1]`},
{name: "221", premise: `op(100,xfy,.).`, input: `X = 1.e, X = [1|e].`},
{name: "258", premise: `op(100,xfy,.).`, input: `writeq(ok).%
1 = X.`, output: `ok`},
{name: "145", input: `write_canonical('$VAR'(0)).`, output: `'$VAR'(0)`},
{name: "146", input: `write_term('$VAR'(0),[]).`, output: `$VAR(0)`},
{name: "244", input: `writeq('$VAR'(0)).`, output: `A`},
{name: "245", input: `writeq('$VAR'(-1)).`, output: `'$VAR'(-1)`},
{name: "246", input: `writeq('$VAR'(-2)).`, output: `'$VAR'(-2)`},
{name: "247", input: `writeq('$VAR'(x)).`, output: `'$VAR'(x)`},
{name: "289", input: `writeq('$VAR'('A')).`, output: `'$VAR'('A')`},
{name: "147", premise: `op(9,fy,fy),op(9,yf,yf).`, input: `write_canonical(fy 1 yf).`, output: `fy(yf(1))`},
{name: "148", premise: `op(9,fy,fy),op(9,yf,yf).`, input: `write_canonical(fy yf).`, output: `syntax err.`},
{name: "149", premise: `op(9,fy,fy),op(9,yf,yf).`, input: `writeq(fy(yf(1))).`, output: `fy 1 yf`},
{name: "150", premise: `op(9,fy,fy),op(9,yf,yf).`, input: `writeq(yf(fy(1))).`, output: `(fy 1)yf`},
{name: "151", premise: `op(9,fy,fy),op(9,yfx,yfx).`, input: `write_canonical(fy 1 yfx 2).`, output: `fy(yfx(1,2))`},
{name: "152", premise: `op(9,fy,fy),op(9,yfx,yfx).`, input: `writeq(fy(yfx(1,2))).`, output: `fy 1 yfx 2`},
{name: "153", premise: `op(9,fy,fy),op(9,yfx,yfx).`, input: `writeq(yfx(fy(1),2)).`, output: `(fy 1)yfx 2`},
{name: "154", premise: `op(9,yf,yf),op(9,xfy,xfy).`, input: `write_canonical(1 xfy 2 yf).`, output: `xfy(1,yf(2))`},
{name: "155", premise: `op(9,yf,yf),op(9,xfy,xfy).`, input: `writeq(xfy(1,yf(2))).`, output: `1 xfy 2 yf`},
{name: "156", premise: `op(9,yf,yf),op(9,xfy,xfy).`, input: `writeq(yf(xfy(1,2))).`, output: `(1 xfy 2)yf`},
{name: "157", premise: `op(0,xfy,:-).`, input: `current_op(P,xfx,:-).`, output: `fails`},
{name: "158", input: `op(0,xfy,',').`, output: `permission_error(modify,operator,',')`},
{name: "159", premise: `op(9,fy,f),op(9,yf,f).`, input: `write_canonical(f f 0).`, output: `f(f(0))`},
{name: "201", premise: `op(9,fy,f),op(9,yf,f).`, input: `writeq(f(f(0))).`, output: `f f 0`},
{name: "202", premise: `op(9,fy,f),op(9,yf,f).`, input: `write_canonical(f 0 f).`, output: `f(f(0))`},
{name: "160", premise: `op(9,fy,f),op(9,yf,f).`, input: `write_canonical(0 f f).`, output: `f(f(0))`},
{name: "161", premise: `op(9,fy,f),op(9,yf,f).`, input: `write_canonical(f f).`, output: `syntax err.`},
{name: "162", premise: `op(9,fy,p),op(9,yfx,p).`, input: `write_canonical(1 p p p 2).`, output: `syntax err.`},
{name: "163", premise: `op(9,fy,p),op(9,xfy,p).`, input: `write_canonical(1 p p p 2).`, output: `p(1,p(p(2)))`},
{name: "164", premise: `op(7,fy,p),op(9,yfx,p).`, input: `write_canonical(1 p p p 2).`, output: `p(1,p(p(2)))`},
{name: "165", input: `atom('.''-''.').`},
{name: "166", input: `op(0,xfy,'|').`},
{name: "167", premise: `op(0,xfy,'|').`, input: `writeq((a|b)).`, output: `syntax err.`},
{name: "168", input: `op(0,xfy,.),op(9,yf,.).`},
{name: "169", premise: `op(0,xfy,.),op(9,yf,.).`, input: `writeq(.(.)).`, output: `('.')'.'`},
{name: "194", input: `op(0,xfy,.),writeq((.)+(.)).`, output: `'.'+'.'`},
{name: "170", input: `set_prolog_flag(double_quotes,chars).`},
{name: "171", premise: `set_prolog_flag(double_quotes,chars).`, input: `writeq("a").`, output: `[a]`},
{name: "229", premise: `set_prolog_flag(double_quotes,chars).`, input: `writeq("\z").`, output: `syntax err.`},
{name: "300", premise: `set_prolog_flag(double_quotes,chars).`, input: `writeq("\0\").`, output: `['\x0\']`},
{name: "172", input: `X is 10.0** -323, writeq(X).`, output: `1.000000000000000000000000000000000e-323`},
{name: "173", input: `1.0e-323=:=10.0** -323.`},
{name: "174", input: `-1 = -0x1.`},
{name: "175", input: `T = t(0b1,0o1,0x1), T = t(1,1,1).`},
{name: "176", input: `X is 0b1mod 2, X = 1.`},
{name: "217", input: `op(1105,xfy,'|').`},
{name: "181", premise: `op(1105,xfy,'|').`, input: `writeq((a-->b,c|d)).`, output: `a-->b,c|d`},
{name: "290", premise: `op(1105,xfy,'|').`, input: `writeq([(a|b)]).`, output: `[(a|b)]`},
{name: "186", input: `X/* /*/=7, X = 7.`},
{name: "187", input: `X/*/*/=7, X = 7.`},
{name: "198", input: `atom($-).`},
{name: "199", input: `atom(-$).`},
{name: "200", premise: `op(900, fy, [$]).`, input: `write_canonical($a+b).`, output: `$(+(a,b))`},
{name: "224", input: `\ .`, output: `existence_error(procedure,(\)/0)`},
{name: "225", input: `char_code(C,0), writeq(C).`, output: `'\x0\'`},
{name: "250", input: `writeq('\0\').`, output: `'\x0\'`},
{name: "226", input: `write_canonical(_+_).`, outputFn: func(t *testing.T, output string) {
t.Helper()
p, err := regexp.Compile(`\A\+\(_(\d+),_(\d+)\)\z`) // +(_1,_2)
assert.NoError(t, err)
match := p.FindAllStringSubmatch(output, 2)
assert.NotEqual(t, match[0][1], match[0][2])
}},
{name: "227", input: `write_canonical(B+B).`, outputFn: func(t *testing.T, output string) {
t.Helper()
p, err := regexp.Compile(`\A\+\(_(\d+),_(\d+)\)\z`) // +(_1,_1)
assert.NoError(t, err)
match := p.FindAllStringSubmatch(output, 2)
assert.Equal(t, match[0][1], match[0][2])
}},
{name: "228", input: `writeq(0'\z).`, output: `syntax err.`},
{name: "230", input: `char_code('\^',X).`, output: `syntax err.`},
{name: "231", input: `writeq(0'\c).`, output: `syntax err.`},
{name: "232", input: `writeq(0'\ ).`, output: `syntax err.`},
{name: "232", input: `writeq(nop (1)).`, output: `syntax err.`},
{name: "234", premise: `op(400,fx,f).`, input: `writeq(f/*.*/(1,2)).`, output: `f (1,2)`},
{name: "235", premise: `op(400,fx,f).`, input: `writeq(1 = f).`, output: `syntax err.`},
{name: "236", input: `write_canonical(a- - -b).`, output: `-(a,-(-(b)))`},
{name: "237", input: `op(699,xf,>).`, output: `permission_error(create,operator,>)`},
{name: "238", premise: `\+catch(op(699,xf,>), error(permission_error(create,operator,>), _), false).`, input: `writeq(>(>(a),b)).`, output: `>(a)>b`},
{name: "239", premise: `\+catch(op(699,xf,>), error(permission_error(create,operator,>), _), false).`, input: `write_canonical(a> >b).`, output: `syntax err.`},
{name: "242", premise: `\+catch(op(699,xf,>), error(permission_error(create,operator,>), _), false).`, input: `write_canonical(a> =b).`, output: `syntax err.`},
{name: "243", premise: `\+catch(op(699,xf,>), error(permission_error(create,operator,>), _), false).`, input: `write_canonical((a>,b)).`, output: `syntax err.`},
{name: "240", premise: `\+catch(op(699,xf,>), error(permission_error(create,operator,>), _), false).`, input: `write_canonical(a>).`, output: `syntax err.`},
{name: "251", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0bop 2).`, output: `0 bop 2`},
{name: "263", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0 bop 2).`, output: `0 bop 2`},
{name: "252", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0 bop 2).`, output: `0 bop 2`},
{name: "253", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0b 2).`, output: `0 b 2`},
{name: "254", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0op 2).`, output: `0 op 2`},
{name: "255", premise: `op(9,yfx,[bop,bo,b,op,xor]).`, input: `writeq(0xor 2).`, output: `0 xor 2`},
{name: "264", input: "writeq('^`').", output: "'^`'"},
{name: "265", input: `op(9,yf,[b2,o8]).`},
{name: "266", premise: `op(9,yf,[b2,o8]).`, input: `writeq(0b2).`, output: `0 b2`},
{name: "267", premise: `op(9,yf,[b2,o8]).`, input: `writeq(0o8).`, output: `0 o8`},
{name: "268", input: `op(500, xfy, {}).`, output: `permission_error(create,operator,{})`},
{name: "269", input: `writeq('\b\r\f\t\n').`, output: `'\b\r\f\t\n'`},
{name: "270", input: `get_char(C), C = ' '. %a`},
{name: "271", input: `get_char(C), C = '%'.%a`},
{name: "272", input: `writeq(0B1).`, output: `syntax err.`},
{name: "274", input: `op(20,fx,--),writeq(--(a)).`, output: `--a`},
{name: "275", premise: `op(20,fx,--).`, input: `op(0,fy,--),writeq(--(a)).`, output: `--(a)`},
{name: "276", input: `writeq(0xamod 2).`, output: `10 mod 2`},
{name: "280", input: `writeq(00'+'1).`, output: `0+1`},
{name: "281", input: `writeq(00'a).`, output: `syntax err.`},
{name: "284", input: `writeq('\^J').`, output: `syntax err.`},
{name: "291", input: `writeq([(a,b)]).`, output: `[(a,b)]`},
{name: "292", input: `writeq(1= \\).`, output: `1= \\`},
{name: "293", input: `writeq((,)).`, output: `syntax err.`},
{name: "294", input: `writeq({[}).`, output: `syntax err.`},
{name: "295", input: `writeq({(}).`, output: `syntax err.`},
{name: "298", input: `writeq([a,b|c]).`, output: `[a,b|c]`},
{name: "299", input: `(\+ (a,b)) = \+(T).`},
{name: "302", input: `[] = '[]'.`},
{name: "304", premise: `op(300,fy,~).`, input: `writeq(~ (a=b)).`, output: `~ (a=b)`},
{name: "305", input: `writeq(\ (a=b)).`, output: `\ (a=b)`},
{name: "306", input: `writeq(+ (a=b)).`, output: `+ (a=b)`},
{name: "307", input: `writeq([/**/]).`, output: `[]`},
{name: "308", input: `writeq(.+).`, output: `.+`},
{name: "309", input: `writeq({a,b}).`, output: `{a,b}`},
{name: "310", input: `writeq({\+ (}).`, output: `syntax err.`},
{name: "311", input: `Finis ().`, output: `syntax err.`},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
var out bytes.Buffer
p := New(bytes.NewBufferString(tt.input+"\n"), &out)
if tt.premise != "" {
assert.NoError(t, p.QuerySolution(tt.premise).Err())
}
sol := p.QuerySolution(`
catch(catch((read(X), X),
error(syntax_error(_), _),
write('syntax err.')),
error(E, _),
writeq(E)), !; write(fails).
`)
assert.NoError(t, sol.Err())
if tt.outputFn != nil {
tt.outputFn(t, out.String())
} else {
assert.Equal(t, tt.output, out.String())
}
})
}
}
func TestInterpreter_Exec(t *testing.T) {
tests := []struct {
query string
args []interface{}
err bool
premise string
}{
{query: `append(nil, L, L).`},
{query: `0.`, err: true},
{query: `append(cons(X, L1), L2, cons(X, L3)) :- append(L1, L2, L3).`},
{query: `foo(?, ?, ?, ?).`, args: []interface{}{"a", 1, 2, []string{"abc", "def"}}},
{query: `foo(?).`, args: []interface{}{nil}, err: true},
{query: `#!/usr/bin/env 1pl
append(nil, L, L).`},
{query: `#!/usr/bin/env 1pl`},
{query: `a.`, premise: `term_expansion(_, _) :- throw(fail).`, err: true},
{query: `:- true.`},
{query: `:- fail.`, err: true},
{query: `:- throw(ball).`, err: true},
{query: `:- initialization(true).`},
{query: `:- initialization(fail).`, err: true},
{query: `:- initialization(throw(ball)).`, err: true},
}
for _, tt := range tests {
t.Run(tt.query, func(t *testing.T) {
var i Interpreter
i.Register0(engine.NewAtom("true"), func(_ *engine.VM, k engine.Cont, env *engine.Env) *engine.Promise {
return k(env)
})
i.Register0(engine.NewAtom("fail"), func(*engine.VM, engine.Cont, *engine.Env) *engine.Promise {
return engine.Bool(false)
})
i.Register1(engine.NewAtom("consult"), engine.Consult)
i.Register3(engine.NewAtom("op"), engine.Op)
assert.NoError(t, i.Exec(`:-(op(1200, xfx, :-)).`))
assert.NoError(t, i.Exec(`:-(op(1200, fx, :-)).`))
assert.NoError(t, i.Exec(tt.premise))
if tt.err {
assert.Error(t, i.Exec(tt.query, tt.args...))
} else {
assert.NoError(t, i.Exec(tt.query, tt.args...))
}
})
}
}
func TestInterpreter_Query(t *testing.T) {
type result struct {
A string
B int
C string
List []string `prolog:"D"`
}
tests := []struct {
query string
args []interface{}
queryErr, scanErr bool
scan interface{}
result interface{}
}{
{query: `append(X, Y, Z).`, scan: map[string]interface{}{}, result: map[string]interface{}{
"X": []interface{}{},
"Y": nil,
"Z": nil,
}},
{query: `append([a, b], [c], X).`, scan: map[string]TermString{}, result: map[string]TermString{
"X": "[a,b,c]",
}},
{query: `foo(?, ?, ?, ?).`, args: []interface{}{nil, 1, "2.0", []string{"abc", "def"}}, queryErr: true, result: nil},
{query: `foo(A, B, C, D).`, scan: &result{}, result: &result{
A: "a",
B: 1,
C: "2.0",
List: []string{"abc", "def"},
}},
}
for _, tt := range tests {
t.Run(tt.query, func(t *testing.T) {
var i Interpreter
i.Register3(engine.NewAtom("op"), engine.Op)
i.Register2(engine.NewAtom("set_prolog_flag"), engine.SetPrologFlag)
assert.NoError(t, i.Exec(`
:-(op(1200, xfx, :-)).
:-(set_prolog_flag(double_quotes, atom)).
append([], L, L).
append([X|L1], L2, [X|L3]) :- append(L1, L2, L3).
foo(a, 1, 2.0, [abc, def]).
`))
sols, err := i.Query(tt.query, tt.args...)
if tt.queryErr {
assert.Error(t, err)
return
} else {
assert.NoError(t, err)
}
assert.True(t, sols.Next())
if tt.scanErr {
assert.Error(t, sols.Scan(tt.scan))
return
} else {
assert.NoError(t, sols.Scan(tt.scan))
}
assert.Equal(t, tt.result, tt.scan)
})
}
}
func TestInterpreter_Query_close(t *testing.T) {
var i Interpreter
i.Register0(engine.NewAtom("do_not_call"), func(_ *engine.VM, k engine.Cont, env *engine.Env) *engine.Promise {
assert.Fail(t, "unreachable")
return k(env)
})
sols, err := i.Query("do_not_call.")
assert.NoError(t, err)
assert.NoError(t, sols.Close())
}
func TestDict(t *testing.T) {
type result struct {
solutions map[string]TermString
err error
}
tests := []struct {
program string
query string
wantResult []result
wantError error
}{
// pathological
{
query: "A = point{x }.",
wantError: fmt.Errorf("unexpected token: close curly(})"),
},
{
query: "A = point{x: }.",
wantError: fmt.Errorf("unexpected token: close curly(})"),
},
{
query: "A = point{x: 5, }.",
wantError: fmt.Errorf("unexpected token: close curly(})"),
},
{
query: "A = point{x: 5,, }.",
wantError: fmt.Errorf("unexpected token: comma(,)"),
},
{
query: "A = point{x: 5 .",
wantError: fmt.Errorf("unexpected token: end(.)"),
},
{
query: "A = point{}",
wantError: fmt.Errorf("unexpected token: close curly(})"),
},
{
query: "A = point{}}.",
wantError: fmt.Errorf("unexpected token: close curly(})"),
},
{
query: "A = point{x=1}.",
wantError: fmt.Errorf("unexpected token: graphic(=)"),
},
{
query: "A = point{5=1}.",
wantError: fmt.Errorf("unexpected token: integer(5)"),
},
// construction
{
query: "A = point{}.",
wantResult: []result{{solutions: map[string]TermString{
"A": "point{}",
}}},
},
{
query: "A = point{x: 1, y: 2}.",
wantResult: []result{{solutions: map[string]TermString{
"A": "point{x:1,y:2}",
}}},
},
{
query: "A = point{y: 1, x: 2}.",
wantResult: []result{{solutions: map[string]TermString{
"A": "point{x:2,y:1}",
}}},
},
{
program: "point(point{x: 5}).",
query: "point(X).",
wantResult: []result{{solutions: map[string]TermString{
"X": "point{x:5}",
}}},
},
{
program: "origin(point{y:Y, x:X}) :- [X, Y] = [0, 0].",
query: "origin(X).",
wantResult: []result{{solutions: map[string]TermString{
"X": "point{x:0,y:0}",
}}},
},
{
program: "match(dict{x: X, y: 10}) :- X = 5.",
query: "match(dict{x:5, y:Y}).",
wantResult: []result{{solutions: map[string]TermString{
"Y": "10",
}}},
},
{
program: "contains([dict{x: 1}, dict{y: 2}]).",
query: "contains([A, B]).",
wantResult: []result{{solutions: map[string]TermString{
"A": "dict{x:1}",
"B": "dict{y:2}",
}}},
},
{
program: "combine(dict{a: A, b: B}) :- A = dict{x: 1}, B = dict{y: 2}.",
query: "combine(X).",
wantResult: []result{{solutions: map[string]TermString{
"X": "dict{a:dict{x:1},b:dict{y:2}}",
}}},
},
{
query: "A = point{x: 1, x: 2}.",
wantError: fmt.Errorf("duplicate key: x"),
},
{
program: "fail_case(dict{x: 5}).",
query: "fail_case(dict{x: 10}).",
wantResult: []result{},
},
{
query: "A = point{x:1,y:2}, B = point{x:10,y:20}, S = segment{from: A, to: B}.",
wantResult: []result{{solutions: map[string]TermString{
"A": "point{x:1,y:2}",
"B": "point{x:10,y:20}",
"S": "segment{from:point{x:1,y:2},to:point{x:10,y:20}}",
}}},
},
{
query: "S = segment{to:point{y:20, x:10}, from:point{y:2, x:1}}.",
wantResult: []result{{solutions: map[string]TermString{
"S": "segment{from:point{x:1,y:2},to:point{x:10,y:20}}",
}}},
},
// unification
{
query: "point{x:1, y:2} = point{y:2, x:X}.",
wantResult: []result{{solutions: map[string]TermString{
"X": "1",
}}},
},
{
query: "Tag = point, X = Tag{y:2, x:6}.",
wantResult: []result{{solutions: map[string]TermString{
"Tag": "point",
"X": "point{x:6,y:2}",
}}},
},
{
query: "point{x:1, y:2} = Tag{y:2, x:X}.",
wantResult: []result{{solutions: map[string]TermString{
"Tag": "point",
"X": "1",
}}},
},
{
program: "p(V) :- V = point{x:1}.x. p(V) :- V = point{y:2}.y.",
query: "p(V).",
wantResult: []result{{solutions: map[string]TermString{
"V": "1",
}}, {solutions: map[string]TermString{