1 files changed, 148 insertions, 0 deletions
diff --git a/tests/src/CoreMangLib/cti/system/mathf/mathfieeeremainder.cs b/tests/src/CoreMangLib/cti/system/mathf/mathfieeeremainder.cs
new file mode 100644
index 0000000000..a4cdde39fe
--- /dev/null
+++ b/tests/src/CoreMangLib/cti/system/mathf/mathfieeeremainder.cs
@@ -0,0 +1,148 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+using System;
+
+/// <summary>
+/// System.MathF.IEEERemainder(System.Single, System.Single)
+/// </summary>
+public class MathFIEEERemainder
+{
+    public static int Main(string[] args)
+    {
+        MathFIEEERemainder ieeeRemainder = new MathFIEEERemainder();
+        TestLibrary.TestFramework.BeginTestCase("Testing System.MathF.IEEERemainder(System.Single,System.Single)...");
+
+        if (ieeeRemainder.RunTests())
+        {
+            TestLibrary.TestFramework.EndTestCase();
+            TestLibrary.TestFramework.LogInformation("PASS");
+            return 100;
+        }
+        else
+        {
+            TestLibrary.TestFramework.EndTestCase();
+            TestLibrary.TestFramework.LogInformation("FAIL");
+            return 0;
+        }
+    }
+
+    public bool RunTests()
+    {
+        bool retVal = true;
+
+        TestLibrary.TestFramework.LogInformation("[Positive]");
+        retVal = PosTest1() && retVal;
+        retVal = PosTest2() && retVal;
+        retVal = PosTest3() && retVal;
+        retVal = PosTest4() && retVal;
+
+        return retVal;
+    }
+
+    public bool PosTest1()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest1: Verify  x / y fails halfway between two integer,the even integer is less than odd integer...");
+
+        try
+        {
+            float x = 5;
+            float y = 2;
+            float remainder = MathF.IEEERemainder(x, y);
+
+            // When x=5,y=2,the quotient should be equal to the even nember 2, therefore the IEEERemainder is positive
+            if (remainder != x - MathF.Floor(x / y) * y)
+            {
+                TestLibrary.TestFramework.LogError("001", "The remainder should be x - (y*quotient)!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("002", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+    public bool PosTest2()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest2: Verify x/y fails halfway between two integer,the add integer is less than even integer...");
+
+        try
+        {
+            float x = 7;
+            float y = 2;
+            float remainder = MathF.IEEERemainder(x, y);
+
+            //When x=7,y=2,the quotient should be equal to the even number 4,therefore the IEEERemainder is negative
+            if (remainder != x - MathF.Ceiling(x / y) * y)
+            {
+                TestLibrary.TestFramework.LogError("003", "The remainder should be x - (y*quotient)!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("004", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+    public bool PosTest3()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest3: Verify divisor is zero...");
+
+        try
+        {
+            float x = TestLibrary.Generator.GetSingle(-55);
+            float y = 0;
+            float remainder = MathF.IEEERemainder(x, y);
+
+            if (!float.IsNaN(remainder))
+            {
+                TestLibrary.TestFramework.LogError("005", "The value should be float.NaN!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("006", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+    public bool PosTest4()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest4: Verify the value 0 is returned when x - (y*quotient) is zero...");
+
+        try
+        {
+            float x = 6;
+            float y = 2;
+            float remainder = MathF.IEEERemainder(x, y);
+
+            if (remainder != 0)
+            {
+                TestLibrary.TestFramework.LogError("007", "The value should be zero!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("008", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+}