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Implement SA1305 and unit tests
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Lines changed: 282 additions & 2 deletions

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‎StyleCop.Analyzers/StyleCop.Analyzers.Test/NamingRules/SA1305UnitTests.cs‎

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// Copyright (c) Tunnel Vision Laboratories, LLC. All Rights Reserved.
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// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
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namespace StyleCop.Analyzers.Test.NamingRules
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{
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using System.Collections.Generic;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.CodeAnalysis.Diagnostics;
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using StyleCop.Analyzers.NamingRules;
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using TestHelper;
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using Xunit;
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public class SA1305UnitTests : DiagnosticVerifier
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{
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private const string SettingsFileName = "stylecop.json";
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private const string DefaultTestSettings = @"
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{
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""settings"": {
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""namingRules"": {
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""allowCommonHungarianPrefixes"": true,
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""allowedHungarianPrefixes"": [ ]
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}
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}
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}
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";
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private string customTestSettings;
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public static IEnumerable<object[]> CommonPrefixes
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{
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get
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{
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yield return new object[] { "as" };
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yield return new object[] { "at" };
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yield return new object[] { "by" };
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yield return new object[] { "do" };
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yield return new object[] { "go" };
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yield return new object[] { "if" };
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yield return new object[] { "in" };
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yield return new object[] { "is" };
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yield return new object[] { "it" };
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yield return new object[] { "no" };
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yield return new object[] { "of" };
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yield return new object[] { "on" };
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yield return new object[] { "or" };
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yield return new object[] { "to" };
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}
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}
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[Fact]
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public async Task TestValidFieldNamesAreNotReportedAsync()
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{
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var testCode = @" public class TestClass
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{
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string bar, Car, fooBar, x, yz;
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}
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";
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await this.VerifyCSharpDiagnosticAsync(testCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
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}
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[Fact]
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public async Task TestValidVariableNamesAreNotReportedAsync()
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{
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var testCode = @" public class TestClass
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{
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public void TestMethod()
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{
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string bar, Car, fooBar, x, yz;
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}
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}
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";
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await this.VerifyCSharpDiagnosticAsync(testCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
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}
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[Fact]
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public async Task TestInvalidFieldNamesAreReportedAsync()
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{
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var testCode = @" public class TestClass
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{
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string baR, caRe, daRE, fAre;
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}
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";
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DiagnosticResult[] expected =
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{
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this.CSharpDiagnostic().WithLocation(3, 12).WithArguments("field", "baR"),
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this.CSharpDiagnostic().WithLocation(3, 17).WithArguments("field", "caRe"),
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this.CSharpDiagnostic().WithLocation(3, 23).WithArguments("field", "daRE"),
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this.CSharpDiagnostic().WithLocation(3, 29).WithArguments("field", "fAre")
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};
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await this.VerifyCSharpDiagnosticAsync(testCode, expected, CancellationToken.None).ConfigureAwait(false);
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}
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[Fact]
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public async Task TestInvalidVariableNamesAreReportedAsync()
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{
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var testCode = @" public class TestClass
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{
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public void TestMethod()
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{
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string baR, caRe, daRE, fAre;
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}
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}
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";
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DiagnosticResult[] expected =
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{
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this.CSharpDiagnostic().WithLocation(5, 16).WithArguments("variable", "baR"),
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this.CSharpDiagnostic().WithLocation(5, 21).WithArguments("variable", "caRe"),
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this.CSharpDiagnostic().WithLocation(5, 27).WithArguments("variable", "daRE"),
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this.CSharpDiagnostic().WithLocation(5, 33).WithArguments("variable", "fAre")
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};
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await this.VerifyCSharpDiagnosticAsync(testCode, expected, CancellationToken.None).ConfigureAwait(false);
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}
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[Fact]
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public async Task TestEventFieldsAreNotReportedAsync()
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{
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var testCode = @" public interface ITestInterface
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{
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event System.Action abC;
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}
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";
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await this.VerifyCSharpDiagnosticAsync(testCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
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}
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[Theory]
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[MemberData(nameof(CommonPrefixes))]
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public async Task TestAllowedCommonPrefixesAsync(string prefix)
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{
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var testCode = $@" public class TestClass
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{{
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string {prefix}R;
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}}
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";
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await this.VerifyCSharpDiagnosticAsync(testCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
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}
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[Theory]
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[MemberData(nameof(CommonPrefixes))]
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public async Task TestAllowedCommonPrefixesWhenDisabledAsync(string prefix)
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{
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this.customTestSettings = @"
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{
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""settings"": {
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""namingRules"": {
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""allowCommonHungarianPrefixes"": false,
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""allowedHungarianPrefixes"": [ ]
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}
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}
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}
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";
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var testCode = $@" public class TestClass
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{{
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string {prefix}R;
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}}
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";
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var expected = this.CSharpDiagnostic().WithLocation(3, 12).WithArguments("field", $"{prefix}R");
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await this.VerifyCSharpDiagnosticAsync(testCode, expected, CancellationToken.None).ConfigureAwait(false);
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}
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[Fact]
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public async Task TestExcludedPrefixesAreNotReportedAsync()
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{
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this.customTestSettings = @"
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{
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""settings"": {
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""namingRules"": {
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""allowCommonHungarianPrefixes"": false,
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""allowedHungarianPrefixes"": [ ""ba"", ""ca"", ""da"", ""f"" ]
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}
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}
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}
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";
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var testCode = @" public class TestClass
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{
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string baR, caRe, daRE, fAre;
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}
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";
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await this.VerifyCSharpDiagnosticAsync(testCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
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}
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protected override IEnumerable<DiagnosticAnalyzer> GetCSharpDiagnosticAnalyzers()
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{
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yield return new SA1305FieldNamesMustNotUseHungarianNotation();
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}
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protected override string GetSettings()
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{
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return this.customTestSettings ?? DefaultTestSettings;
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}
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}
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}

‎StyleCop.Analyzers/StyleCop.Analyzers.Test/StyleCop.Analyzers.Test.csproj‎

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<Compile Include="NamingRules\SA1302UnitTests.cs" />
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<Compile Include="NamingRules\SA1303UnitTests.cs" />
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<Compile Include="NamingRules\SA1304UnitTests.cs" />
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<Compile Include="NamingRules\SA1305UnitTests.cs" />
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<Compile Include="NamingRules\SA1306UnitTests.cs" />
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<Compile Include="NamingRules\SA1307UnitTests.cs" />
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<Compile Include="NamingRules\SA1308UnitTests.cs" />

‎StyleCop.Analyzers/StyleCop.Analyzers/NamingRules/SA1305FieldNamesMustNotUseHungarianNotation.cs‎

Lines changed: 76 additions & 2 deletions
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@@ -4,8 +4,13 @@
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namespace StyleCop.Analyzers.NamingRules
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{
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using System.Collections.Immutable;
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using System.Text.RegularExpressions;
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using Helpers;
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using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using Microsoft.CodeAnalysis.Diagnostics;
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using Settings.ObjectModel;
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/// <summary>
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/// The name of a field or variable in C# uses Hungarian notation.
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/// </summary>
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public const string DiagnosticId = "SA1305";
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private const string Title = "Field names must not use Hungarian notation";
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private const string MessageFormat = "TODO: Message format";
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private const string MessageFormat = "{0} {1} must not use Hungarian notation";
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private const string Description = "The name of a field or variable in C# uses Hungarian notation.";
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private const string HelpLink = "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1305.md";
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private static readonly ImmutableArray<DiagnosticDescriptor> SupportedDiagnosticsValue =
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ImmutableArray.Create(Descriptor);
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private static readonly ImmutableArray<string> CommonPrefixes =
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ImmutableArray.Create("as", "at", "by", "do", "go", "if", "in", "is", "it", "no", "of", "on", "or", "to");
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private static readonly Regex HungarianRegex = new Regex(@"^(?<notation>[a-z]{1,2})[A-Z]");
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private static NamingSettings namingSettings;
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/// <inheritdoc/>
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public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics
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{
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/// <inheritdoc/>
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public override void Initialize(AnalysisContext context)
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{
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// TODO: Implement analysis
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context.RegisterCompilationStartAction(HandleCompilationStart);
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}
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private static void HandleCompilationStart(CompilationStartAnalysisContext context)
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{
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namingSettings = context.Options.GetStyleCopSettings().NamingRules;
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context.RegisterSyntaxNodeActionHonorExclusions(HandleVariableDeclarationSyntax, SyntaxKind.VariableDeclaration);
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}
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private static void HandleVariableDeclarationSyntax(SyntaxNodeAnalysisContext context)
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{
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var syntax = (VariableDeclarationSyntax)context.Node;
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if (syntax.Parent.IsKind(SyntaxKind.EventFieldDeclaration))
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{
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return;
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}
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if (NamedTypeHelpers.IsContainedInNativeMethodsClass(syntax))
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{
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return;
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}
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var fieldDeclaration = syntax.Parent.IsKind(SyntaxKind.FieldDeclaration);
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foreach (var variableDeclarator in syntax.Variables)
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{
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if (variableDeclarator == null)
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{
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continue;
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}
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var identifier = variableDeclarator.Identifier;
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if (identifier.IsMissing)
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{
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continue;
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}
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string name = identifier.ValueText;
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if (string.IsNullOrEmpty(name))
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{
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continue;
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}
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var match = HungarianRegex.Match(name);
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if (!match.Success)
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{
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continue;
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}
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var notationValue = match.Groups["notation"].Value;
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if (namingSettings.AllowCommonHungarianPrefixes && CommonPrefixes.Contains(notationValue))
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{
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continue;
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}
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if (namingSettings.AllowedHungarianPrefixes.Contains(notationValue))
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{
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continue;
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}
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// Variable names must begin with lower-case letter
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context.ReportDiagnostic(Diagnostic.Create(Descriptor, identifier.GetLocation(), fieldDeclaration ? "field" : "variable", name));
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}
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}
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}
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}

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