MapTo/test/MapTo.Tests/Tests.cs

488 lines
15 KiB
C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using MapTo.Extensions;
using MapTo.Models;
using MapTo.Tests.Infrastructure;
using Microsoft.CodeAnalysis;
using Shouldly;
using Xunit;
using static MapTo.Extensions.GeneratorExecutionContextExtensions;
namespace MapTo.Tests
{
public class Tests
{
private const int Indent1 = 4;
private const int Indent2 = Indent1 * 2;
private const int Indent3 = Indent1 * 3;
private static readonly Dictionary<string, string> DefaultAnalyzerOptions = new()
{
[GetBuildPropertyName(nameof(SourceGenerationOptions.GenerateXmlDocument))] = "false"
};
private static readonly string ExpectedAttribute = $@"{SourceBuilder.GeneratedFilesHeader}
using System;
namespace MapTo
{{
[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
public sealed class MapFromAttribute : Attribute
{{
public MapFromAttribute(Type sourceType)
{{
SourceType = sourceType;
}}
public Type SourceType {{ get; }}
}}
}}";
private record SourceGeneratorOptions(
bool UseMapToNamespace = false,
string SourceClassNamespace = "Test.Models",
int ClassPropertiesCount = 3,
int SourceClassPropertiesCount = 3,
Action<StringBuilder> PropertyBuilder = null,
Action<StringBuilder> SourcePropertyBuilder = null);
private static string GetSourceText(SourceGeneratorOptions options = null)
{
const string ns = "Test";
options ??= new SourceGeneratorOptions();
var hasDifferentSourceNamespace = options.SourceClassNamespace != ns;
var builder = new StringBuilder();
if (options.UseMapToNamespace)
{
builder.AppendFormat("using {0};", SourceBuilder.NamespaceName).AppendLine();
}
builder
.AppendFormat("using {0};", options.SourceClassNamespace)
.AppendLine()
.AppendLine();
builder
.AppendFormat("namespace {0}", ns)
.AppendOpeningBracket();
if (hasDifferentSourceNamespace && options.UseMapToNamespace)
{
builder
.PadLeft(Indent1)
.AppendFormat("using {0};", options.SourceClassNamespace)
.AppendLine()
.AppendLine();
}
builder
.PadLeft(Indent1)
.AppendLine(options.UseMapToNamespace ? "[MapTo.MapFrom(typeof(Baz))]" : "[MapFrom(typeof(Baz))]")
.PadLeft(Indent1).Append("public partial class Foo")
.AppendOpeningBracket(Indent1);
for (var i = 1; i <= options.ClassPropertiesCount; i++)
{
builder
.PadLeft(Indent2)
.AppendLine(i % 2 == 0 ? $"public int Prop{i} {{ get; set; }}" : $"public int Prop{i} {{ get; }}");
}
options.PropertyBuilder?.Invoke(builder);
builder
.AppendClosingBracket(Indent1, false)
.AppendClosingBracket()
.AppendLine()
.AppendLine();
builder
.AppendFormat("namespace {0}", options.SourceClassNamespace)
.AppendOpeningBracket()
.PadLeft(Indent1).Append("public class Baz")
.AppendOpeningBracket(Indent1);
for (var i = 1; i <= options.SourceClassPropertiesCount; i++)
{
builder
.PadLeft(Indent2)
.AppendLine(i % 2 == 0 ? $"public int Prop{i} {{ get; set; }}" : $"public int Prop{i} {{ get; }}");
}
options.SourcePropertyBuilder?.Invoke(builder);
builder
.AppendClosingBracket(Indent1, false)
.AppendClosingBracket();
return builder.ToString();
}
[Fact]
public void VerifyIgnorePropertyAttribute()
{
// Arrange
const string source = "";
var expectedAttribute = $@"
{SourceBuilder.GeneratedFilesHeader}
using System;
namespace MapTo
{{
[AttributeUsage(AttributeTargets.Property, Inherited = false, AllowMultiple = false)]
public sealed class IgnorePropertyAttribute : Attribute {{ }}
}}
".Trim();
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.ShouldContain(c => c.ToString() == expectedAttribute);
}
[Fact]
public void VerifyMapToAttribute()
{
// Arrange
const string source = "";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.ShouldContain(c => c.ToString() == ExpectedAttribute);
}
[Fact]
public void When_FoundMatchingPropertyNameWithDifferentType_Should_Ignore()
{
// Arrange
var source = GetSourceText(new SourceGeneratorOptions(
true,
PropertyBuilder: builder =>
{
builder
.PadLeft(Indent2).AppendLine("public string Prop4 { get; set; }");
},
SourcePropertyBuilder: builder => builder.PadLeft(Indent2).AppendLine("public int Prop4 { get; set; }")));
var expectedResult = @"
partial class Foo
{
public Foo(Test.Models.Baz baz)
{
if (baz == null) throw new ArgumentNullException(nameof(baz));
Prop1 = baz.Prop1;
Prop2 = baz.Prop2;
Prop3 = baz.Prop3;
}
".Trim();
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldContain(expectedResult);
}
[Fact]
public void When_IgnorePropertyAttributeIsSpecified_Should_NotGenerateMappingsForThatProperty()
{
// Arrange
var source = GetSourceText(new SourceGeneratorOptions(
true,
PropertyBuilder: builder =>
{
builder
.PadLeft(Indent2).AppendLine("[IgnoreProperty]")
.PadLeft(Indent2).AppendLine("public int Prop4 { get; set; }");
},
SourcePropertyBuilder: builder => builder.PadLeft(Indent2).AppendLine("public int Prop4 { get; set; }")));
var expectedResult = @"
partial class Foo
{
public Foo(Test.Models.Baz baz)
{
if (baz == null) throw new ArgumentNullException(nameof(baz));
Prop1 = baz.Prop1;
Prop2 = baz.Prop2;
Prop3 = baz.Prop3;
}
".Trim();
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldContain(expectedResult);
}
[Fact]
public void When_MappingsModifierOptionIsSetToInternal_Should_GenerateThoseMethodsWithInternalAccessModifier()
{
// Arrange
var source = GetSourceText();
var configOptions = new Dictionary<string, string>
{
[GetBuildPropertyName(nameof(SourceGenerationOptions.GeneratedMethodsAccessModifier))] = "Internal",
[GetBuildPropertyName(nameof(SourceGenerationOptions.GenerateXmlDocument))] = "false"
};
var expectedExtension = @"
internal static partial class BazToFooExtensions
{
internal static Foo ToFoo(this Test.Models.Baz baz)
{
return baz == null ? null : new Foo(baz);
}
}".Trim();
var expectedFactory = @"
internal static Foo From(Test.Models.Baz baz)
{
return baz == null ? null : new Foo(baz);
}".Trim();
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: configOptions);
// Assert
diagnostics.ShouldBeSuccessful();
var syntaxTree = compilation.SyntaxTrees.Last().ToString();
syntaxTree.ShouldContain(expectedFactory);
syntaxTree.ShouldContain(expectedExtension);
}
[Fact]
public void When_MapToAttributeFound_Should_GenerateTheClass()
{
// Arrange
const string source = @"
using MapTo;
namespace Test
{
[MapFrom(typeof(Baz))]
public partial class Foo
{
public int Prop1 { get; set; }
}
public class Baz
{
public int Prop1 { get; set; }
}
}
";
const string expectedResult = @"
// <auto-generated />
using System;
namespace Test
{
partial class Foo
{
public Foo(Test.Baz baz)
{
if (baz == null) throw new ArgumentNullException(nameof(baz));
Prop1 = baz.Prop1;
}
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldStartWith(expectedResult.Trim());
}
[Fact]
public void When_MapToAttributeFoundWithoutMatchingProperties_Should_ReportError()
{
// Arrange
var expectedDiagnostic = Diagnostics.NoMatchingPropertyFoundError(Location.None, "Foo", "Baz");
const string source = @"
using MapTo;
namespace Test
{
[MapFrom(typeof(Baz))]
public partial class Foo { }
public class Baz { public int Prop1 { get; set; } }
}
";
// Act
var (_, diagnostics) = CSharpGenerator.GetOutputCompilation(source);
// Assert
var error = diagnostics.FirstOrDefault(d => d.Id == expectedDiagnostic.Id);
error.ShouldNotBeNull();
}
[Fact]
public void When_MapToAttributeWithNamespaceFound_Should_GenerateTheClass()
{
// Arrange
const string source = @"
namespace Test
{
[MapTo.MapFrom(typeof(Baz))]
public partial class Foo { public int Prop1 { get; set; } }
public class Baz { public int Prop1 { get; set; } }
}
";
const string expectedResult = @"
// <auto-generated />
using System;
namespace Test
{
partial class Foo
{
public Foo(Test.Baz baz)
{
if (baz == null) throw new ArgumentNullException(nameof(baz));
Prop1 = baz.Prop1;
}
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldStartWith(expectedResult.Trim());
}
[Fact]
public void When_NoMapToAttributeFound_Should_GenerateOnlyTheAttribute()
{
// Arrange
const string source = "";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees
.Select(s => s.ToString())
.Where(s => !string.IsNullOrWhiteSpace(s.ToString()))
.All(s => s.Contains(": Attribute"))
.ShouldBeTrue();
}
[Fact]
public void When_SourceTypeHasDifferentNamespace_Should_NotAddToUsings()
{
// Arrange
var source = GetSourceText(new SourceGeneratorOptions(SourceClassNamespace: "Bazaar"));
const string expectedResult = @"
// <auto-generated />
using System;
namespace Test
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldStartWith(expectedResult.Trim());
}
[Fact]
public void When_SourceTypeHasMatchingProperties_Should_CreateConstructorAndAssignSrcToDest()
{
// Arrange
var source = GetSourceText();
const string expectedResult = @"
partial class Foo
{
public Foo(Test.Models.Baz baz)
{
if (baz == null) throw new ArgumentNullException(nameof(baz));
Prop1 = baz.Prop1;
Prop2 = baz.Prop2;
Prop3 = baz.Prop3;
}
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldContain(expectedResult.Trim());
}
[Fact]
public void When_SourceTypeHasMatchingProperties_Should_CreateFromStaticMethod()
{
// Arrange
var source = GetSourceText();
const string expectedResult = @"
public static Foo From(Test.Models.Baz baz)
{
return baz == null ? null : new Foo(baz);
}
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldContain(expectedResult.Trim());
}
[Fact]
public void When_SourceTypeHasMatchingProperties_Should_GenerateToExtensionMethodOnSourceType()
{
// Arrange
var source = GetSourceText();
const string expectedResult = @"
public static partial class BazToFooExtensions
{
public static Foo ToFoo(this Test.Models.Baz baz)
{
return baz == null ? null : new Foo(baz);
}
}
";
// Act
var (compilation, diagnostics) = CSharpGenerator.GetOutputCompilation(source, analyzerConfigOptions: DefaultAnalyzerOptions);
// Assert
diagnostics.ShouldBeSuccessful();
compilation.SyntaxTrees.Last().ToString().ShouldContain(expectedResult.Trim());
}
}
}