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feat(mutator): Add conditional operator mutator (#2583)
* feat(Mutators): Add conditional operator mutator Add conditional operator mutator Add tests for conditional operator mutator Include conditional operator mutator in mutations.md * Fixes to unit tests * feat(Mutators): Remove NegateConditionMutator's conditional expression mutation * Fix integration tests * Fix last integration test * ConditionalExpressionMutator should not mutate declaration patterns. Fix tests. * Fix ValidateStrykerResults compilation. --------- Co-authored-by: Michał Isalski <[email protected]> Co-authored-by: Liam Rougoor <[email protected]> Co-authored-by: Liam Rougoor <[email protected]> Co-authored-by: Rouke Broersma <[email protected]>
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src/Stryker.Core/Stryker.Core.UnitTest/Mutators/ConditionalExpressionMutatorTests.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| using Microsoft.CodeAnalysis.CSharp; | ||
| using Microsoft.CodeAnalysis.CSharp.Syntax; | ||
| using Shouldly; | ||
| using Stryker.Core.Mutators; | ||
| using System.Linq; | ||
| using Microsoft.CodeAnalysis; | ||
| using Xunit; | ||
|
|
||
| namespace Stryker.Core.UnitTest.Mutators | ||
| { | ||
| public class ConditionalExpressionMutatorTests : TestBase | ||
| { | ||
| [Fact] | ||
| public void ShouldBeMutationLevelStandard() | ||
| { | ||
| var target = new ConditionalExpressionMutator(); | ||
| target.MutationLevel.ShouldBe(MutationLevel.Standard); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void ShouldMutate_TwoMutations() | ||
| { | ||
| var target = new ConditionalExpressionMutator(); | ||
| var source = @"251 == 73 ? 1 : 0"; | ||
| var tree = CSharpSyntaxTree.ParseText(source); | ||
| var originalNode = tree.GetRoot().DescendantNodes().OfType<ConditionalExpressionSyntax>().Single(); | ||
|
|
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| var result = target.ApplyMutations(originalNode, null).ToList(); | ||
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| result.Count.ShouldBe(2, "Two mutations should have been made"); | ||
| Assert.Collection( | ||
| result, | ||
| m1 => (m1.ReplacementNode is ParenthesizedExpressionSyntax pes && pes.Expression is ConditionalExpressionSyntax ces && ces.Condition.Kind() is SyntaxKind.TrueLiteralExpression).ShouldBeTrue(), | ||
| m2 => (m2.ReplacementNode is ParenthesizedExpressionSyntax pes && pes.Expression is ConditionalExpressionSyntax ces && ces.Condition.Kind() is SyntaxKind.FalseLiteralExpression).ShouldBeTrue() | ||
| ); | ||
| } | ||
|
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||
| [Fact] | ||
| public void ShouldMutate_DoNotTouchBranches() | ||
| { | ||
| var target = new ConditionalExpressionMutator(); | ||
| var source = "251 == 73 ? 1 : 0"; | ||
| var tree = CSharpSyntaxTree.ParseText(source); | ||
| var originalNode = tree.GetRoot().DescendantNodes().OfType<ConditionalExpressionSyntax>().Single(); | ||
|
|
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| var result = target.ApplyMutations(originalNode, null).ToList(); | ||
|
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| foreach (var mutation in result) | ||
| { | ||
| var pes = mutation.ReplacementNode.ShouldBeOfType<ParenthesizedExpressionSyntax>(); | ||
| var ces = pes.Expression.ShouldBeOfType<ConditionalExpressionSyntax>(); | ||
| ces.WhenTrue.IsEquivalentTo(originalNode.WhenTrue).ShouldBeTrue(); | ||
| ces.WhenFalse.IsEquivalentTo(originalNode.WhenFalse).ShouldBeTrue(); | ||
| } | ||
| } | ||
|
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||
| [Fact] | ||
| public void ShouldNotMutateDeclarationPatterns() | ||
| { | ||
| var target = new ConditionalExpressionMutator(); | ||
| var source = "var y = x is object result ? result.ToString() : null;"; | ||
| SyntaxTree tree = CSharpSyntaxTree.ParseText(source); | ||
|
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| var expressionSyntax = tree.GetRoot().DescendantNodes().OfType<ConditionalExpressionSyntax>().Single(); | ||
| var result = target.ApplyMutations(expressionSyntax, null).ToList(); | ||
|
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| result.ShouldBeEmpty(); | ||
| } | ||
| } | ||
| } |
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