From b070845a31410bae7b457201d63ec8b3b7c0e8e6 Mon Sep 17 00:00:00 2001
From: Jaromir Wysoglad
Date: Tue, 2 Apr 2019 12:38:17 +0200
Subject: COMMON: add 2 tests for common/math.h

---
 test/common/math.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'test/common')

diff --git a/test/common/math.h b/test/common/math.h
index 5da0410e8e..11d2b7e827 100644
--- a/test/common/math.h
+++ b/test/common/math.h
@@ -2,6 +2,14 @@
 
 #include "common/math.h"
 
+// Macro function for asserting that the compared values x and y
+// aren't further apart from each other than z.
+
+#define TS_ASSERT_ALMOST_EQUALS(x, y, z) \
+	TS_ASSERT_LESS_THAN(((x) - (y)) >= 0 ? (x) - (y) : (y) - (x), z)
+
+const float PI = 3.141592653;
+const float MAX_ERROR = 0.000001;
 class MathTestSuite : public CxxTest::TestSuite
 {
 	public:
@@ -15,4 +23,18 @@ class MathTestSuite : public CxxTest::TestSuite
 		// Some simple test for 2^10
 		TS_ASSERT_EQUALS(Common::intLog2(1024), 10);
 	}
+	
+	void test_rad2deg() {
+		TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(0), 0, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(PI), 180.0, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(2.0 * PI), 360.0, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::rad2deg(PI / 2.0), 90.0, MAX_ERROR);
+	}
+
+	void test_deg2rad() {
+		TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(0), 0, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(180.0), PI, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(360.0), 2.0 * PI, MAX_ERROR);
+		TS_ASSERT_ALMOST_EQUALS(Common::deg2rad(90.0), PI / 2.0, MAX_ERROR);
+	}
 };
-- 
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