public void ShouldMutate(Mutator expectedKind, SyntaxKind input, params SyntaxKind[] expectedOutput)
{
var target = new BinaryExpressionMutator();
var originalNode = SyntaxFactory.BinaryExpression(input,
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(1)),
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(8)));
var result = target.ApplyMutations(originalNode).ToList();
if (expectedOutput.Count() == 1)
{
// there should be only one mutation
result.ShouldHaveSingleItem();
}
else
{
// there should be two mutations
result.Count.ShouldBe(2, "Two mutations should have been made");
}
int index = 0;
foreach (var mutation in result)
{
mutation.ReplacementNode.IsKind(expectedOutput[index]).ShouldBeTrue();
mutation.Type.ShouldBe(expectedKind);
mutation.DisplayName.ShouldBe($"{mutation.Type} mutation");
index++;
}
}
void ShouldMutate_ExclusiveOr()
{
var kind = SyntaxKind.ExclusiveOrExpression;
var target = new BinaryExpressionMutator();
var originalNode = SyntaxFactory.BinaryExpression(kind,
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(4)),
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(2)));
var result = target.ApplyMutations(originalNode).ToList();
result.Count.ShouldBe(2, "There should be two mutations");
var logicalMutation = result.SingleOrDefault(x => x.Type == Mutator.Logical);
logicalMutation.ShouldNotBeNull();
logicalMutation.ReplacementNode.ShouldNotBeNull();
logicalMutation.ReplacementNode.IsKind(SyntaxKind.EqualsExpression).ShouldBeTrue();
logicalMutation.DisplayName.ShouldBe("Logical mutation");
var integralMutation = result.SingleOrDefault(x => x.Type == Mutator.Bitwise);
integralMutation.ShouldNotBeNull();
integralMutation.ReplacementNode.ShouldNotBeNull();
integralMutation.ReplacementNode.IsKind(SyntaxKind.BitwiseNotExpression).ShouldBeTrue();
integralMutation.DisplayName.ShouldBe("Bitwise mutation");
var parenthesizedExpression = integralMutation.ReplacementNode.ChildNodes().SingleOrDefault();
parenthesizedExpression.ShouldNotBeNull();
parenthesizedExpression.IsKind(SyntaxKind.ParenthesizedExpression).ShouldBeTrue();
var exclusiveOrExpression = parenthesizedExpression.ChildNodes().SingleOrDefault();
exclusiveOrExpression.ShouldNotBeNull();
exclusiveOrExpression.IsKind(SyntaxKind.ExclusiveOrExpression).ShouldBeTrue();
}
public void ApplyMutations_ValidBinaryExpression_ReturnsSingleMutatedBinaryExpression(string originalCode, string expectedCode)
{
var mutator = new BinaryExpressionMutator();
var node = GetBinaryExpression(originalCode);
var mutatedNodes = mutator.ApplyMutations(node);
var mutatedCode = mutatedNodes.Single().ToFullString();
Assert.Equal(expectedCode, mutatedCode);
}
public void ShouldNotMutate_StringsRight()
{
var target = new BinaryExpressionMutator();
var originalNode = SyntaxFactory.BinaryExpression(SyntaxKind.AddExpression,
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(1)),
SyntaxFactory.LiteralExpression(SyntaxKind.StringLiteralExpression, SyntaxFactory.Literal(8)));
var result = target.ApplyMutations(originalNode).ToList();
result.ShouldBeEmpty();
}
public void ApplyMutations_ValidBinaryExpression_ReturnsMultipleMutatedBinaryExpressions(string originalCode, string[] expectedMutatedCode)
{
var mutator = new BinaryExpressionMutator();
var node = GetBinaryExpression(originalCode);
var mutatedNodes = mutator.ApplyMutations(node).ToArray();
Assert.Equal(expectedMutatedCode.Length, mutatedNodes.Length);
for (int i = 0; i < expectedMutatedCode.Length; i++)
{
var mutatedCode = mutatedNodes[i].ToFullString();
Assert.Equal(expectedMutatedCode[i], mutatedCode);
}
}
public void MathMutator_ShouldMutate(SyntaxKind input, SyntaxKind expectedOutput, SyntaxKind optionalExpectedOutput = SyntaxKind.None)
{
var target = new BinaryExpressionMutator();
var originalNode = SyntaxFactory.BinaryExpression(input,
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(1)),
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(8)));
var result = target.ApplyMutations(originalNode).ToList();
if (optionalExpectedOutput == SyntaxKind.None)
{
// there should be only one mutation
result.ShouldHaveSingleItem();
result.ShouldContain(x => x.ReplacementNode.IsKind(expectedOutput));
}
else
{
// there should be two mutations
result.Count.ShouldBe(2, "Two mutations should have been made");
result.ShouldContain(x => x.ReplacementNode.IsKind(expectedOutput));
result.ShouldContain(x => x.ReplacementNode.IsKind(optionalExpectedOutput));
}
}
public void ShouldBeMutationLevelBasic()
{
var target = new BinaryExpressionMutator();
target.MutationLevel.ShouldBe(MutationLevel.Basic);
}
