Update PngSsimComparerTests.cs

SimonCropp · SimonCropp · commit 11a29fdab326 · 2026-04-16T16:56:33.000+10:00
diff --git a/src/Verify.Tests/Compare/Png/PngSsimComparerTests.cs b/src/Verify.Tests/Compare/Png/PngSsimComparerTests.cs
@@ -85,6 +85,14 @@ public async Task Threshold_Tuning_Tightens_Comparison()
         }
     }
 
+    [Fact]
+    public async Task Single_Pixel_Grayscale_Identical()
+    {
+        var png = PngTestHelper.EncodeGray(1, 1, [0]);
+        var result = await PngSsimComparer.Compare(new MemoryStream(png), new MemoryStream(png), emptyContext);
+        Assert.True(result.IsEqual);
+    }
+
     [Fact]
     public async Task Corrupt_Png_Throws()
     {

Original file line number	Diff line number	Diff line change
`@@ -85,6 +85,14 @@ public async Task Threshold_Tuning_Tightens_Comparison()`
`85`	`85`	`}`
`86`	`86`	`}`
`87`	`87`
	`88`	`+ [Fact]`
	`89`	`+ public async Task Single_Pixel_Grayscale_Identical()`
	`90`	`+ {`
	`91`	`+ var png = PngTestHelper.EncodeGray(1, 1, [0]);`
	`92`	`+ var result = await PngSsimComparer.Compare(new MemoryStream(png), new MemoryStream(png), emptyContext);`
	`93`	`+ Assert.True(result.IsEqual);`
	`94`	`+ }`
	`95`	`+`
`88`	`96`	`[Fact]`
`89`	`97`	`public async Task Corrupt_Png_Throws()`
`90`	`98`	`{`