Set the environment when executing Scaffold-DBContext

Fixes #35641

Author: AndriySvyryd

Diff for: src/EFCore.Design/Design/Internal/AppServiceProviderFactory.cs

@@ -89,4 +89,30 @@ private IServiceProvider CreateEmptyServiceProvider()
 
         return new ServiceCollection().BuildServiceProvider();
     }
+
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
+    public static void SetEnvironment(IOperationReporter reporter)
+    {
+        var aspnetCoreEnvironment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
+        var dotnetEnvironment = Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT");
+        var environment = aspnetCoreEnvironment
+            ?? dotnetEnvironment
+            ?? "Development";
+        if (aspnetCoreEnvironment == null)
+        {
+            Environment.SetEnvironmentVariable("ASPNETCORE_ENVIRONMENT", environment);
+        }
+
+        if (dotnetEnvironment == null)
+        {
+            Environment.SetEnvironmentVariable("DOTNET_ENVIRONMENT", environment);
+        }
+
+        reporter.WriteVerbose(DesignStrings.UsingEnvironment(environment));
+    }
 }

Diff for: src/EFCore.Design/Design/Internal/DatabaseOperations.cs

@@ -11,6 +11,7 @@ namespace Microsoft.EntityFrameworkCore.Design.Internal;
 /// </summary>
 public class DatabaseOperations
 {
+    private readonly IOperationReporter _reporter;
     private readonly string _projectDir;
     private readonly string? _rootNamespace;
     private readonly string? _language;
@@ -34,6 +35,7 @@ public DatabaseOperations(
         bool nullable,
         string[]? args)
     {
+        _reporter = reporter;
         _projectDir = projectDir;
         _rootNamespace = rootNamespace;
         _language = language;
@@ -73,6 +75,7 @@ public virtual SavedModelFiles ScaffoldContext(
             ? Path.GetFullPath(Path.Combine(_projectDir, outputContextDir))
             : outputDir;
 
+        AppServiceProviderFactory.SetEnvironment(_reporter);
         var services = _servicesBuilder.Build(provider);
         using var scope = services.CreateScope();
 

Diff for: src/EFCore.Design/Design/Internal/DbContextOperations.cs

@@ -503,22 +503,7 @@ private IDictionary<Type, Func<DbContext>> FindContextTypes(string? name = null,
     {
         _reporter.WriteVerbose(DesignStrings.FindingContexts);
 
-        var aspnetCoreEnvironment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
-        var dotnetEnvironment = Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT");
-        var environment = aspnetCoreEnvironment
-            ?? dotnetEnvironment
-            ?? "Development";
-        if (aspnetCoreEnvironment == null)
-        {
-            Environment.SetEnvironmentVariable("ASPNETCORE_ENVIRONMENT", environment);
-        }
-
-        if (dotnetEnvironment == null)
-        {
-            Environment.SetEnvironmentVariable("DOTNET_ENVIRONMENT", environment);
-        }
-
-        _reporter.WriteVerbose(DesignStrings.UsingEnvironment(environment));
+        AppServiceProviderFactory.SetEnvironment(_reporter);
 
         var contexts = new Dictionary<Type, Func<DbContext>?>();
 

Diff for: test/EFCore.Design.Tests/Design/Internal/DatabaseOperationsTest.cs

@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using Microsoft.EntityFrameworkCore.Internal;
+
 namespace Microsoft.EntityFrameworkCore.Design.Internal;
 
 public class DatabaseOperationsTest
@@ -10,16 +12,79 @@ public void Can_pass_null_args()
     {
         // Even though newer versions of the tools will pass an empty array
         // older versions of the tools can pass null args.
+        CreateOperations(null);
+    }
+
+    [ConditionalFact]
+    public void ScaffoldContext_throws_exceptions_for_invalid_context_name()
+    {
+        ValidateContextNameInReverseEngineerGenerator("Invalid!CSharp*Class&Name");
+        ValidateContextNameInReverseEngineerGenerator("1CSharpClassNameCannotStartWithNumber");
+        ValidateContextNameInReverseEngineerGenerator("volatile");
+    }
+
+    private void ValidateContextNameInReverseEngineerGenerator(string contextName)
+    {
+        var operations = CreateOperations([]);
+
+        Assert.Equal(
+            DesignStrings.ContextClassNotValidCSharpIdentifier(contextName),
+            Assert.Throws<ArgumentException>(
+                    () => operations.ScaffoldContext(
+                        "Microsoft.EntityFrameworkCore.SqlServer",
+                        "connectionstring",
+                        "",
+                        "",
+                        dbContextClassName: contextName,
+                        null,
+                        null,
+                        "FakeNamespace",
+                        contextNamespace: null,
+                        useDataAnnotations: false,
+                        overwriteFiles: true,
+                        useDatabaseNames: false,
+                        suppressOnConfiguring: true,
+                        noPluralize: false))
+                .Message);
+    }
+
+    [ConditionalFact]
+    public void ScaffoldContext_sets_environment()
+    {
+        var operations = CreateOperations([]);
+        operations.ScaffoldContext(
+            "Microsoft.EntityFrameworkCore.SqlServer",
+            TestEnvironment.DefaultConnection,
+            "",
+            "",
+            dbContextClassName: nameof(TestContext),
+            schemas: ["Empty"],
+            null,
+            null,
+            contextNamespace: null,
+            useDataAnnotations: false,
+            overwriteFiles: true,
+            useDatabaseNames: false,
+            suppressOnConfiguring: true,
+            noPluralize: false);
+
+        Assert.Equal("Development", Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT"));
+        Assert.Equal("Development", Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT"));
+    }
+
+    private static DatabaseOperations CreateOperations(string[] args)
+    {
         var assembly = MockAssembly.Create(typeof(TestContext));
-        _ = new TestDatabaseOperations(
+        var operations = new DatabaseOperations(
             new TestOperationReporter(),
             assembly,
             assembly,
             "projectDir",
             "RootNamespace",
             "C#",
             nullable: false,
-            args: null);
+            args: args);
+        return operations;
     }
 
     public class TestContext : DbContext;

Diff for: test/EFCore.Design.Tests/Migrations/Design/CSharpMigrationOperationGeneratorTest.cs

@@ -2453,7 +2453,7 @@ public void InsertDataOperation_required_empty_array()
                 Assert.Single(o.Columns);
                 Assert.Equal(1, o.Values.GetLength(0));
                 Assert.Equal(1, o.Values.GetLength(1));
-                Assert.Equal([], (string[])o.Values[0, 0]);
+                Assert.Equal(new string[0], (string[])o.Values[0, 0]);
             });
 
     [ConditionalFact]
@@ -2478,7 +2478,7 @@ public void InsertDataOperation_required_empty_array_composite()
                 Assert.Equal(1, o.Values.GetLength(0));
                 Assert.Equal(3, o.Values.GetLength(1));
                 Assert.Null(o.Values[0, 1]);
-                Assert.Equal([], (string[])o.Values[0, 2]);
+                Assert.Equal(new string[0], (string[])o.Values[0, 2]);
             });
 
     [ConditionalFact]

Diff for: test/EFCore.Design.Tests/Scaffolding/Internal/ReverseEngineeringConfigurationTests.cs

@@ -677,7 +677,7 @@ public void Navigations_on_base_type_should_be_inherited()
         var specialCustomerType = model.AddEntityType(typeof(SpecialCustomer));
 
         Assert.Equal(new[] { "Orders" }, customerType.GetNavigations().Select(p => p.Name).ToArray());
-        Assert.Equal([], specialCustomerType.GetNavigations().Select(p => p.Name).ToArray());
+        Assert.Equal(new string[0], specialCustomerType.GetNavigations().Select(p => p.Name).ToArray());
 
         specialCustomerType.BaseType = customerType;
 

Diff for: test/EFCore.Design.Tests/TestUtilities/TestDatabaseOperations.cs

@@ -23,7 +23,7 @@ public void Can_convert_bytes_to_strings()
         var converter = _bytesToStringConverter.ConvertFromProviderExpression.Compile();
 
         Assert.Equal(new byte[] { 83, 112, 196, 177, 110, 204, 136, 97, 108, 32, 84, 97, 112 }, converter("U3DEsW7MiGFsIFRhcA=="));
-        Assert.Equal([], converter(""));
+        Assert.Equal(new byte[0], converter(""));
     }
 
     [ConditionalFact]

Diff for: test/EFCore.Tests/Metadata/Internal/EntityTypeTest.BaseType.cs

@@ -13,7 +13,7 @@ public void Can_convert_strings_to_UTF8()
         var converter = _stringToUtf8Converter.ConvertToProviderExpression.Compile();
 
         Assert.Equal(new byte[] { 83, 112, 196, 177, 110, 204, 136, 97, 108, 32, 84, 97, 112 }, converter("Spın̈al Tap"));
-        Assert.Equal([], converter(""));
+        Assert.Equal(new byte[0], converter(""));
     }
 
     [ConditionalFact]