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bugfix: improve CollectionShouldHaveCountGreaterOrEqualTo_CountShouldBeGreaterOrEqualTo detection #392

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Oct 21, 2024
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bugfix: improve CollectionShouldHaveCountGreaterOrEqualTo_CountShouldBeGreaterOrEqualTo detection #392

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26 changes: 26 additions & 0 deletions src/FluentAssertions.Analyzers.Tests/Tips/CollectionTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -451,18 +451,44 @@ public void CollectionShouldHaveCount_LengthShouldBe_TestNoAnalyzer(string asser
[DataTestMethod]
[AssertionDiagnostic("actual.Count().Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("actual.Count().Should().BeGreaterOrEqualTo(6{0});")]
[AssertionDiagnostic("actual.Count.Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("actual.Count.Should().BeGreaterOrEqualTo(6{0});")]
[AssertionDiagnostic("actual.ToArray().Length.Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("actual.ToArray().Length.Should().BeGreaterOrEqualTo(6{0});")]
[AssertionDiagnostic("actual.AsEnumerable().Count().Should().BeGreaterOrEqualTo(k{0}).And.ToString();")]
[AssertionDiagnostic("actual.AsEnumerable().Count().Should().BeGreaterOrEqualTo(6{0}).And.ToString();")]
[Implemented]
public void CollectionShouldHaveCountGreaterOrEqualTo_TestAnalyzer(string assertion) => VerifyCSharpDiagnosticCodeBlock(assertion, DiagnosticMetadata.CollectionShouldHaveCountGreaterOrEqualTo_CountShouldBeGreaterOrEqualTo);

[DataTestMethod]
[AssertionDiagnostic("(actual.Count() + 1).Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("(actual.Count() + 1).Should().BeGreaterOrEqualTo(6{0});")]
[AssertionDiagnostic("(actual.Count + 1).Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("(actual.Count + 1).Should().BeGreaterOrEqualTo(6{0});")]
[AssertionDiagnostic("(actual.ToArray().Length + 1).Should().BeGreaterOrEqualTo(k{0});")]
[AssertionDiagnostic("(actual.ToArray().Length + 1).Should().BeGreaterOrEqualTo(6{0});")]
[Implemented]
public void CollectionShouldHaveCountGreaterOrEqualTo_TestNoAnalyzer(string assertion) => DiagnosticVerifier.VerifyCSharpDiagnosticUsingAllAnalyzers(GenerateCode.GenericIListCodeBlockAssertion(assertion));

[DataTestMethod]
[AssertionCodeFix(
oldAssertion: "actual.Count().Should().BeGreaterOrEqualTo(k{0});",
newAssertion: "actual.Should().HaveCountGreaterOrEqualTo(k{0});")]
[AssertionCodeFix(
oldAssertion: "actual.Count().Should().BeGreaterOrEqualTo(6{0});",
newAssertion: "actual.Should().HaveCountGreaterOrEqualTo(6{0});")]
[AssertionCodeFix(
oldAssertion: "actual.Count.Should().BeGreaterOrEqualTo(k{0});",
newAssertion: "actual.Should().HaveCountGreaterOrEqualTo(k{0});")]
[AssertionCodeFix(
oldAssertion: "actual.Count.Should().BeGreaterOrEqualTo(6{0});",
newAssertion: "actual.Should().HaveCountGreaterOrEqualTo(6{0});")]
[AssertionCodeFix(
oldAssertion: "actual.ToArray().Length.Should().BeGreaterOrEqualTo(k{0});",
newAssertion: "actual.ToArray().Should().HaveCountGreaterOrEqualTo(k{0});")]
[AssertionCodeFix(
oldAssertion: "actual.ToArray().Length.Should().BeGreaterOrEqualTo(6{0});",
newAssertion: "actual.ToArray().Should().HaveCountGreaterOrEqualTo(6{0});")]
[AssertionCodeFix(
oldAssertion: "actual.AsEnumerable().Count().Should().BeGreaterOrEqualTo(k{0}).And.ToString();",
newAssertion: "actual.AsEnumerable().Should().HaveCountGreaterOrEqualTo(k{0}).And.ToString();")]
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4 changes: 4 additions & 0 deletions src/FluentAssertions.Analyzers/Tips/FluentAssertionsAnalyzer.Utils.cs
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Expand Up @@ -72,6 +72,8 @@ public FluentAssertionsMetadata(Compilation compilation)
IReadonlyDictionaryOfT2 = compilation.GetTypeByMetadataName(typeof(IReadOnlyDictionary<,>).FullName);
IListOfT = compilation.GetTypeByMetadataName(typeof(IList<>).FullName);
IReadonlyListOfT = compilation.GetTypeByMetadataName(typeof(IReadOnlyList<>).FullName);
ICollectionOfT = compilation.GetTypeByMetadataName(typeof(ICollection<>).FullName);
IReadonlyCollectionOfT = compilation.GetTypeByMetadataName(typeof(IReadOnlyCollection<>).FullName);
Enumerable = compilation.GetTypeByMetadataName(typeof(Enumerable).FullName);
IEnumerable = compilation.GetTypeByMetadataName(typeof(IEnumerable).FullName);
Math = compilation.GetTypeByMetadataName(typeof(Math).FullName);
Expand All @@ -91,6 +93,8 @@ public FluentAssertionsMetadata(Compilation compilation)
public INamedTypeSymbol IReadonlyDictionaryOfT2 { get; }
public INamedTypeSymbol IListOfT { get; }
public INamedTypeSymbol IReadonlyListOfT { get; }
public INamedTypeSymbol ICollectionOfT { get; }
public INamedTypeSymbol IReadonlyCollectionOfT { get; }
public INamedTypeSymbol BooleanAssertionsOfT1 { get; }
public INamedTypeSymbol NumericAssertionsOfT2 { get; }
public INamedTypeSymbol Enumerable { get; }
Expand Down
13 changes: 12 additions & 1 deletion src/FluentAssertions.Analyzers/Tips/FluentAssertionsAnalyzer.cs
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Expand Up @@ -423,7 +423,7 @@ private static void AnalyzeInvocation(OperationAnalysisContext context, FluentAs
return;
case "BeGreaterOrEqualTo" when assertion.IsContainedInType(metadata.NumericAssertionsOfT2):
{
if (invocation.TryGetFirstDescendent<IInvocationOperation>(out var invocationBeforeShould))
if (invocation.TryGetSingleArgumentAs<IInvocationOperation>(out var invocationBeforeShould))
{
switch (invocationBeforeShould.TargetMethod.Name)
{
Expand All @@ -434,6 +434,17 @@ private static void AnalyzeInvocation(OperationAnalysisContext context, FluentAs
}
}

if (invocation.TryGetSingleArgumentAs<IPropertyReferenceOperation>(out var propertyBeforeShould))
{
switch (propertyBeforeShould.Property.Name)
{
case nameof(Array.Length) when propertyBeforeShould.IsContainedInType(SpecialType.System_Array):
case nameof(List<object>.Count) when propertyBeforeShould.ImplementsOrIsInterface(SpecialType.System_Collections_Generic_ICollection_T):
context.ReportDiagnostic(CreateDiagnostic(assertion, DiagnosticMetadata.CollectionShouldHaveCountGreaterOrEqualTo_CountShouldBeGreaterOrEqualTo));
return;
}
}

if (assertion.TryGetChainedInvocationAfterAndConstraint("BeLessOrEqualTo", out var chainedInvocation))
{
if (!assertion.HasEmptyBecauseAndReasonArgs(startingIndex: 1) && !chainedInvocation.HasEmptyBecauseAndReasonArgs(startingIndex: 1)) return;
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