1 files changed, 183 insertions, 0 deletions
diff --git a/tests/src/CoreMangLib/cti/system/mathf/mathfabs.cs b/tests/src/CoreMangLib/cti/system/mathf/mathfabs.cs
new file mode 100644
index 0000000000..7e0184d437
--- /dev/null
+++ b/tests/src/CoreMangLib/cti/system/mathf/mathfabs.cs
@@ -0,0 +1,183 @@
+// 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.Abs(System.Single)
+/// </summary>
+public class MathFAbs
+{
+    public static int Main(string[] args)
+    {
+        MathFAbs abs = new MathFAbs();
+        TestLibrary.TestFramework.BeginTestCase("Testing System.MathF.Abs(System.Single)...");
+
+        if (abs.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;
+        retVal = PosTest5() && retVal;
+        retVal = PosTest6() && retVal;
+
+
+        return retVal;
+    }
+
+    public bool PosTest1()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest1: Verify the max value of float should be equal to its Abs value");
+
+        try
+        {
+            float max = float.MaxValue;
+            if (MathF.Abs(max) != max)
+            {
+                TestLibrary.TestFramework.LogError("001", "The Abs of max value should be equal to itself!");
+                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 the min value of float should be equal to its Abs value");
+
+        try
+        {
+            float min = float.MinValue;
+            if (MathF.Abs(min) != -min)
+            {
+                TestLibrary.TestFramework.LogError("003", "The Abs of max value should be equal to it's contrary!");
+                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 the NegativeInfinity of float should be equal to its contrary...");
+
+        try
+        {
+            float negInfinit = float.NegativeInfinity;
+            if (MathF.Abs(negInfinit) != -negInfinit)
+            {
+                TestLibrary.TestFramework.LogError("005", "The Abs of max value should be equal to it's contrary!");
+                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 PositiveInfinity of float should be equal to its Abs value");
+
+        try
+        {
+            float posInfinit = float.PositiveInfinity;
+            if (MathF.Abs(posInfinit) != posInfinit)
+            {
+                TestLibrary.TestFramework.LogError("007", "The Abs of max value should be equal to itself!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("008", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+    public bool PosTest5()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest5: Verify Abs value of zero should be equal to both itself and its contrary value...");
+
+        try
+        {
+            float zero = 0;
+            if (MathF.Abs(zero) != zero || MathF.Abs(zero) != -zero)
+            {
+                TestLibrary.TestFramework.LogError("009", "Abs value of zero should be equal to both itself and its contrary value!");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("010", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+
+    public bool PosTest6()
+    {
+        bool retVal = true;
+        TestLibrary.TestFramework.BeginScenario("PosTest6: Verify Abs value of Epsilon ");
+
+        try
+        {
+            float epsilon = float.Epsilon;
+            if (MathF.Abs(epsilon) != epsilon)
+            {
+                TestLibrary.TestFramework.LogError("011", "Abs value of epsilon should be equal to itself...");
+                retVal = false;
+            }
+        }
+        catch (Exception e)
+        {
+            TestLibrary.TestFramework.LogError("012", "Unexpected exception occurs: " + e);
+            retVal = false;
+        }
+
+        return retVal;
+    }
+}