feat: Add public Count property on ImmutableMetadata (#715)

* Add public Count property on ImmutableMetadata

Signed-off-by: Kyle Julian <38759683+kylejuliandev@users.noreply.github.com>

* Address code review comment

Signed-off-by: Kyle Julian <38759683+kylejuliandev@users.noreply.github.com>

---------

Signed-off-by: Kyle Julian <38759683+kylejuliandev@users.noreply.github.com>

Author: kylejuliandev

src/OpenFeature/Model/ImmutableMetadata.cs

@@ -19,6 +19,11 @@ public sealed class ImmutableMetadata
     /// </value>
     public bool IsEmpty => this._metadata.Count == 0;
 
+    /// <summary>
+    /// Gets the number of elements in this collection.
+    /// </summary>
+    public int Count => this._metadata.Count;
+
     /// <summary>
     /// Constructor for the <see cref="ImmutableMetadata"/> class.
     /// </summary>
@@ -104,6 +109,4 @@ public ImmutableMetadata(Dictionary<string, object> metadata)
 
         return value is T tValue ? tValue : null;
     }
-
-    internal int Count => this._metadata.Count;
 }

test/OpenFeature.Tests/ImmutableMetadataTest.cs

@@ -334,7 +334,7 @@ public void IsEmpty_ShouldReturnFalse()
     {
         // Arrange
         var metadata = new Dictionary<string, object>
-           {
+        {
             {
                 "wrongKey", new object()
             },
@@ -359,4 +359,21 @@ public void IsEmpty_ShouldReturnFalse()
         // Assert
         Assert.False(result);
     }
+
+    [Theory]
+    [InlineData(0)]
+    [InlineData(1)]
+    [InlineData(1000)]
+    public void Count_ShouldReturnCorrectNumber(int numberOfItems)
+    {
+        var metadata = Enumerable.Range(0, numberOfItems)
+            .ToDictionary(i => $"key{i}", i => (object)$"value{i}");
+        var flagMetadata = new ImmutableMetadata(metadata);
+
+        // Act
+        var count = flagMetadata.Count;
+
+        // Assert
+        Assert.Equal(numberOfItems, count);
+    }
 }