feat: Create comparer for strings (#55)

* Add string equality comparer
* Separate analyzer and compilation unit definitions for enum
* Updated README
* Added more tests
* Separate analyzer and compilation unit definitions for enum for hashcodes as well
* More correct way to check enum value

Generator.Equals.Runtime/Attributes.cs

@@ -62,6 +62,19 @@ public class SetEqualityAttribute : Attribute
     {
     }
 
+    [GeneratedCode("Generator.Equals", "1.0.0.0")]
+    [Conditional("GENERATOR_EQUALS")]
+    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
+    public class StringEqualityAttribute : Attribute
+    {
+        public StringComparison ComparisonType { get; }
+
+        public StringEqualityAttribute(StringComparison comparisonType)
+        {
+            ComparisonType = comparisonType;
+        }
+    }
+
     [GeneratedCode("Generator.Equals", "1.0.0.0")]
     [Conditional("GENERATOR_EQUALS")]
     [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]

Generator.Equals.SnapshotTests/Classes/StringEquality.Net60.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/Classes/StringEquality.NetFramework48.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/RecordStructs/StringEquality.Net60.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/RecordStructs/StringEquality.NetFramework48.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/Records/StringEquality.Net60.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/Records/StringEquality.NetFramework48.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/Structs/StringEquality.Net60.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.SnapshotTests/Structs/StringEquality.NetFramework48.Diagnostics.verified.txt

@@ -0,0 +1 @@
+[]

Generator.Equals.Tests/Classes/StringEquality.Sample.cs

@@ -0,0 +1,31 @@
+using System;
+
+namespace Generator.Equals.Tests.Classes
+{
+    public partial class StringEquality
+    {
+        [Equatable]
+        public partial class SampleCaseInsensitive
+        {
+            public SampleCaseInsensitive(string name)
+            {
+                Name = name;
+            }
+
+            [StringEquality(StringComparison.CurrentCultureIgnoreCase)]
+            public string Name { get; }
+        }
+
+        [Equatable]
+        public partial class SampleCaseSensitive
+        {
+            public SampleCaseSensitive(string name)
+            {
+                Name = name;
+            }
+
+            [StringEquality(StringComparison.CurrentCulture)]
+            public string Name { get; }
+        }
+    }
+}

Generator.Equals.Tests/Classes/StringEquality.cs

@@ -0,0 +1,55 @@
+namespace Generator.Equals.Tests.Classes
+{
+    public partial class StringEquality
+    {
+        public class EqualsTestsNotCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive("BAR");
+            public override object Factory2() => new SampleCaseInsensitive("bar");
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class NotEqualsTestsNotCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive("BAR");
+            public override object Factory2() => new SampleCaseInsensitive("foo");
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class EqualsTestsCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseSensitive("Foo");
+            public override object Factory2() => new SampleCaseSensitive("Foo");
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 == (SampleCaseSensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 != (SampleCaseSensitive)value2;
+        }
+
+        public class NotEqualsTestsCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseSensitive("Foo");
+            public override object Factory2() => new SampleCaseSensitive("foo");
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 == (SampleCaseSensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 != (SampleCaseSensitive)value2;
+        }
+    }
+}

Generator.Equals.Tests/RecordStructs/StringEquality.Sample.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace Generator.Equals.Tests.RecordStructs
+{
+    public partial class StringEquality
+    {
+        [Equatable]
+        public partial record struct SampleCaseInsensitive(
+            [property: StringEquality(StringComparison.CurrentCultureIgnoreCase)]
+            string Name);
+
+        [Equatable]
+        public partial record struct SampleCaseSensitive(
+            [property: StringEquality(StringComparison.CurrentCulture)]
+            string Name);
+    }
+}

Generator.Equals.Tests/RecordStructs/StringEquality.cs

@@ -0,0 +1,30 @@
+namespace Generator.Equals.Tests.RecordStructs
+{
+    public partial class StringEquality
+    {
+        public class EqualsTests : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "bar" };
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class NotEqualsTest : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "foo" };
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+    }
+}

Generator.Equals.Tests/Records/StringEquality.Sample.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace Generator.Equals.Tests.Records
+{
+    public partial class StringEquality
+    {
+        [Equatable]
+        public partial record SampleCaseInsensitive
+        {
+            [StringEquality(StringComparison.CurrentCultureIgnoreCase)]
+            public string Name { get; init; } = "";
+        }
+
+        [Equatable]
+        public partial record SampleCaseSensitive
+        {
+            [StringEquality(StringComparison.CurrentCulture)]
+            public string Name { get; init; } = "";
+        }
+    }
+}

Generator.Equals.Tests/Records/StringEquality.cs

@@ -0,0 +1,55 @@
+namespace Generator.Equals.Tests.Records
+{
+    public partial class StringEquality
+    {
+        public class EqualsTestsNotCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "bar" };
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class NotEqualsTestsNotCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "foo" };
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class EqualsTestsCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseSensitive { Name = "Foo" };
+            public override object Factory2() => new SampleCaseSensitive { Name = "Foo" };
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 == (SampleCaseSensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 != (SampleCaseSensitive)value2;
+        }
+
+        public class NotEqualsTestsCaseSensitive : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseSensitive { Name = "Foo" };
+            public override object Factory2() => new SampleCaseSensitive { Name = "foo" };
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 == (SampleCaseSensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseSensitive)value1 != (SampleCaseSensitive)value2;
+        }
+    }
+}

Generator.Equals.Tests/Structs/StringEquality.Sample.cs

@@ -0,0 +1,31 @@
+using System;
+
+namespace Generator.Equals.Tests.Structs
+{
+    public partial class StringEquality
+    {
+        [Equatable]
+        public partial struct SampleCaseInsensitive
+        {
+            public SampleCaseInsensitive(string name)
+            {
+                Name = name;
+            }
+
+            [StringEquality(StringComparison.CurrentCultureIgnoreCase)]
+            public string Name { get; init; } = "";
+        }
+
+        [Equatable]
+        public partial struct SampleCaseSensitive
+        {
+            public SampleCaseSensitive(string name)
+            {
+                Name = name;
+            }
+
+            [StringEquality(StringComparison.CurrentCulture)]
+            public string Name { get; init; } = "";
+        }
+    }
+}

Generator.Equals.Tests/Structs/StringEquality.cs

@@ -0,0 +1,30 @@
+namespace Generator.Equals.Tests.Structs
+{
+    public partial class StringEquality
+    {
+        public class EqualsTests : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "bar" };
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+
+        public class NotEqualsTest : EqualityTestCase
+        {
+            public override object Factory1() => new SampleCaseInsensitive { Name = "BAR" };
+            public override object Factory2() => new SampleCaseInsensitive { Name = "foo" };
+            public override bool Expected => false;
+
+            public override bool EqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 == (SampleCaseInsensitive)value2;
+
+            public override bool NotEqualsOperator(object value1, object value2) =>
+                (SampleCaseInsensitive)value1 != (SampleCaseInsensitive)value2;
+        }
+    }
+}

Generator.Equals/AttributesMetadata.cs

@@ -1,4 +1,5 @@
-using Microsoft.CodeAnalysis;
+using System.Collections.Immutable;
+using Microsoft.CodeAnalysis;
 
 namespace Generator.Equals
 {
@@ -11,17 +12,21 @@ public class AttributesMetadata
         public INamedTypeSymbol UnorderedEquality { get; }
         public INamedTypeSymbol ReferenceEquality { get; }
         public INamedTypeSymbol SetEquality { get; }
+        public INamedTypeSymbol StringEquality { get; }
         public INamedTypeSymbol CustomEquality { get; }
+        public ImmutableDictionary<long, string> StringComparisonLookup { get; }
 
         public AttributesMetadata(
             INamedTypeSymbol equatable,
             INamedTypeSymbol defaultEquality,
             INamedTypeSymbol orderedEquality,
             INamedTypeSymbol ignoreEquality,
-            INamedTypeSymbol unorderedEquality, 
-            INamedTypeSymbol referenceEquality, 
+            INamedTypeSymbol unorderedEquality,
+            INamedTypeSymbol referenceEquality,
             INamedTypeSymbol setEquality,
-            INamedTypeSymbol customEquality)
+            INamedTypeSymbol stringEquality,
+            INamedTypeSymbol customEquality,
+            ImmutableDictionary<long, string> stringComparisonLookup)
         {
             Equatable = equatable;
             DefaultEquality = defaultEquality;
@@ -30,7 +35,9 @@ public AttributesMetadata(
             UnorderedEquality = unorderedEquality;
             ReferenceEquality = referenceEquality;
             SetEquality = setEquality;
+            StringEquality = stringEquality;
             CustomEquality = customEquality;
+            StringComparisonLookup = stringComparisonLookup;
         }
     }
 }