unittest subtraktion

test/test_minirechner.c

@@ -44,4 +44,10 @@ void test_minitaschenrechner_5_minus_2(void)
     TEST_ASSERT_EQUAL(3, result);
 }
 
+void test_minitaschenrechner_float_minus_float(void)
+{
+    float result = subtrahieren(2.7, 1.3);
+    TEST_ASSERT_EQUAL(1.4, result);
+}
+
 #endif // TEST