adding test case for fractions

tests/mesh/core/number/FractionTests.as

@@ -0,0 +1,28 @@
+package mesh.core.number
+{
+	import mesh.core.object.inspect;
+
+	import org.flexunit.assertThat;
+	import org.hamcrest.object.equalTo;
+
+	public class FractionTests
+	{
+		[Test]
+		public function testGCD():void
+		{
+			var tests:Array = [
+				{a:1, b:2, expected:1},
+				{a:0, b:3, expected:3},
+				{a:3, b:0, expected:3},
+				{a:108, b:30, expected:6},
+				{a:-108, b:30, expected:6},
+				{a:108, b:-30, expected:6},
+				{a:-108, b:-30, expected:6}
+			];
+
+			for each (var test:Object in tests) {
+				assertThat("test failed: " + inspect(test), Fraction.gcd(test.a, test.b), equalTo(test.expected));
+			}
+		}
+	}
+}