add tests for log function with integers

test/test_logarithmus.c

@@ -40,15 +40,10 @@ void test_ln_with_zero_and_negative_numbers(void){
 void test_logarithmic_function_with_edge_cases(void){
     double r1, r2, r3, r4;
 
-    r1 = logX(0, 10);
-    r2 = logX(-1.0, 9);
-    r3 = logX(1, 18);
-    r4 = logX(3, 0);
-
-    printf("%lf\n", r1);
-    printf("%lf\n", r2);
-    printf("%lf\n", r3);
-    printf("%lf\n", r4);
+    r1 = logX(0, 10.0);
+    r2 = logX(-1.0, 9.0);
+    r3 = logX(1.0, 18.0);
+    r4 = logX(3.0, 0.0);
 
     TEST_ASSERT_EQUAL_DOUBLE(-1.0, r1);
     TEST_ASSERT_EQUAL_DOUBLE(-1.0, r2);
@@ -56,5 +51,19 @@ void test_logarithmic_function_with_edge_cases(void){
     TEST_ASSERT_EQUAL_DOUBLE(-1.0, r4);
 }
 
+void test_logarithmic_function_with_integers(void){
+    double r1, r2, r3, r4;
+
+    r1 = logX(0.5, 48.0);
+    r2 = logX(2.0, 8.0);
+    r3 = logX(3.2, 18.0);
+    r4 = logX(6.0, 36.0);
+
+    TEST_ASSERT_DOUBLE_WITHIN(0.000001, -5.584962, r1);
+    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 3.0, r2);
+    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 2.484950, r3);
+    TEST_ASSERT_DOUBLE_WITHIN(0.000001, 2.0, r4);
+}
+
 
 #endif // TEST