From 9bb9c9692af8dfce0a183a24f68b2f1a077e19d8 Mon Sep 17 00:00:00 2001
From: Oliver Booth <me@olivr.me>
Date: Tue, 28 Mar 2023 16:09:35 +0100
Subject: [PATCH] tests: 100% coverage on Circle and CircleF

---
 X10D.Tests/src/Drawing/CircleFTests.cs | 16 ++++++++++++++++
 X10D.Tests/src/Drawing/CircleTests.cs  | 16 ++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/X10D.Tests/src/Drawing/CircleFTests.cs b/X10D.Tests/src/Drawing/CircleFTests.cs
index cad0907..d8e8256 100644
--- a/X10D.Tests/src/Drawing/CircleFTests.cs
+++ b/X10D.Tests/src/Drawing/CircleFTests.cs
@@ -73,6 +73,15 @@ public class CircleFTests
         Assert.IsFalse(unitCircle1 != unitCircle2);
     }
 
+    [TestMethod]
+    public void Equals_ShouldBeTrue_GivenUnitCirclesAsObjects()
+    {
+        CircleF unitCircle1 = CircleF.Unit;
+        object unitCircle2 = CircleF.Unit;
+        Assert.AreEqual(unitCircle1, unitCircle2);
+        Assert.IsTrue(unitCircle1.Equals(unitCircle2));
+    }
+
     [TestMethod]
     public void Equals_ShouldBeFalse_GivenDifferentCircles()
     {
@@ -81,6 +90,13 @@ public class CircleFTests
         Assert.IsTrue(CircleF.Unit != CircleF.Empty);
     }
 
+    [TestMethod]
+    public void Equals_ShouldBeFalse_GivenDifferentObjects()
+    {
+        Assert.AreNotEqual((object?)null, CircleF.Empty);
+        Assert.IsFalse(CircleF.Empty.Equals(null));
+    }
+
     [TestMethod]
     public void GetHashCode_ShouldBeCorrect_GivenEmptyCircle()
     {
diff --git a/X10D.Tests/src/Drawing/CircleTests.cs b/X10D.Tests/src/Drawing/CircleTests.cs
index ae9214e..3151299 100644
--- a/X10D.Tests/src/Drawing/CircleTests.cs
+++ b/X10D.Tests/src/Drawing/CircleTests.cs
@@ -73,6 +73,15 @@ public class CircleTests
         Assert.IsFalse(unitCircle1 != unitCircle2);
     }
 
+    [TestMethod]
+    public void Equals_ShouldBeTrue_GivenUnitCirclesAsObjects()
+    {
+        Circle unitCircle1 = Circle.Unit;
+        object unitCircle2 = Circle.Unit;
+        Assert.AreEqual(unitCircle1, unitCircle2);
+        Assert.IsTrue(unitCircle1.Equals(unitCircle2));
+    }
+
     [TestMethod]
     public void Equals_ShouldBeFalse_GivenDifferentCircles()
     {
@@ -81,6 +90,13 @@ public class CircleTests
         Assert.IsTrue(Circle.Unit != Circle.Empty);
     }
 
+    [TestMethod]
+    public void Equals_ShouldBeFalse_GivenDifferentObjects()
+    {
+        Assert.AreNotEqual((object?)null, Circle.Empty);
+        Assert.IsFalse(Circle.Empty.Equals(null));
+    }
+
     [TestMethod]
     public void GetHashCode_ShouldBeCorrect_GivenEmptyCircle()
     {