uncaughtException: report more than one exception per test (#4033)

Author: juergba

Diff for: lib/reporters/base.js

@@ -197,6 +197,7 @@ var generateDiff = (exports.generateDiff = function(actual, expected) {
  *     Error property
  */
 exports.list = function(failures) {
+  var multipleErr, multipleTest;
   Base.consoleLog();
   failures.forEach(function(test, i) {
     // format
@@ -207,7 +208,16 @@ exports.list = function(failures) {
 
     // msg
     var msg;
-    var err = test.err;
+    var err;
+    if (test.err && test.err.multiple) {
+      if (multipleTest !== test) {
+        multipleTest = test;
+        multipleErr = [test.err].concat(test.err.multiple);
+      }
+      err = multipleErr.shift();
+    } else {
+      err = test.err;
+    }
     var message;
     if (err.message && typeof err.message.toString === 'function') {
       message = err.message + '';
@@ -298,7 +308,12 @@ function Base(runner, options) {
     if (showDiff(err)) {
       stringifyDiffObjs(err);
     }
-    test.err = err;
+    // more than one error per test
+    if (test.err && err instanceof Error) {
+      test.err.multiple = (test.err.multiple || []).concat(err);
+    } else {
+      test.err = err;
+    }
     failures.push(test);
   });
 }

Diff for: test/reporters/base.spec.js

@@ -417,6 +417,22 @@ describe('Base reporter', function() {
     expect(errOut, 'to be', '1) test title:\n     Error\n  foo\n  bar');
   });
 
+  it('should list multiple Errors per test', function() {
+    var err = new Error('First Error');
+    err.multiple = [new Error('Second Error - same test')];
+    var test = makeTest(err);
+
+    list([test, test]);
+
+    var errOut = stdout.join('\n').trim();
+    expect(
+      errOut,
+      'to contain',
+      'Error: First Error',
+      'Error: Second Error - same test'
+    );
+  });
+
   describe('when reporter output immune to user test changes', function() {
     var sandbox;
     var baseConsoleLog;