feat: add IsEmptyOrWhiteSpace for Memory<T> and ReadOnlyMemory<T>

Signed-off-by: Kenny Pflug <kenny.pflug@live.de>

Author: feO2x

Code/Light.GuardClauses.Tests/StringAssertions/IsEmptyOrWhiteSpaceTests.cs

@@ -61,4 +61,60 @@ public static void MixedReadOnlySpan()
         var readOnlySpan = " a\t".AsSpan();
         readOnlySpan.IsEmptyOrWhiteSpace().Should().BeFalse();
     }
+
+    [Fact]
+    public static void EmptyMemory()
+    {
+        var memory = new Memory<char>([]);
+        memory.IsEmptyOrWhiteSpace().Should().BeTrue();
+    }
+
+    [Fact]
+    public static void WhiteSpaceMemory()
+    {
+        var memory = new Memory<char>(" \t\n".ToCharArray());
+        memory.IsEmptyOrWhiteSpace().Should().BeTrue();
+    }
+
+    [Fact]
+    public static void NonWhiteSpaceMemory()
+    {
+        var memory = new Memory<char>("abc".ToCharArray());
+        memory.IsEmptyOrWhiteSpace().Should().BeFalse();
+    }
+
+    [Fact]
+    public static void MixedMemory()
+    {
+        var memory = new Memory<char>(" a\t".ToCharArray());
+        memory.IsEmptyOrWhiteSpace().Should().BeFalse();
+    }
+
+    [Fact]
+    public static void EmptyReadOnlyMemory()
+    {
+        var readOnlyMemory = new ReadOnlyMemory<char>([]);
+        readOnlyMemory.IsEmptyOrWhiteSpace().Should().BeTrue();
+    }
+
+    [Fact]
+    public static void WhiteSpaceReadOnlyMemory()
+    {
+        var readOnlyMemory = new ReadOnlyMemory<char>(" \t\n".ToCharArray());
+        readOnlyMemory.IsEmptyOrWhiteSpace().Should().BeTrue();
+    }
+
+    [Fact]
+    public static void NonWhiteSpaceReadOnlyMemory()
+    {
+        var readOnlyMemory = new ReadOnlyMemory<char>("abc".ToCharArray());
+        readOnlyMemory.IsEmptyOrWhiteSpace().Should().BeFalse();
+    }
+
+    [Fact]
+    public static void MixedReadOnlyMemory()
+    {
+        var readOnlyMemory = new ReadOnlyMemory<char>(" a\t".ToCharArray());
+        readOnlyMemory.IsEmptyOrWhiteSpace().Should().BeFalse();
+    }
 }

Code/Light.GuardClauses/Check.IsEmptyOrWhiteSpace.cs

@@ -34,4 +34,18 @@ public static bool IsEmptyOrWhiteSpace(this ReadOnlySpan<char> span)
 
         return true;
     }
+
+    /// <summary>
+    /// Checks if the specified memory is empty or contains only white space characters.
+    /// </summary>
+    /// <param name="memory">The memory to be checked.</param>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsEmptyOrWhiteSpace(this Memory<char> memory) => memory.Span.IsEmptyOrWhiteSpace();
+
+    /// <summary>
+    /// Checks if the specified memory is empty or contains only white space characters.
+    /// </summary>
+    /// <param name="memory">The memory to be checked.</param>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsEmptyOrWhiteSpace(this ReadOnlyMemory<char> memory) => memory.Span.IsEmptyOrWhiteSpace();
 }