Added unittest for logarithmBase2Function

src/test/c/test_taschenrechner.c

@@ -144,4 +144,11 @@ void test_naturalLogarithmFunction(void) {
     TEST_ASSERT_EQUAL_FLOAT(0.0, naturalLogarithmFunction(1.0));
 }
 
+// Logarithm with base 2 function
+void test_logarithmBase2Function(void) {
+    // Your test code here
+    TEST_ASSERT_EQUAL_FLOAT(3.0, logarithmBase2Function(8.0));
+}
+
+
 #endif // TEST