added test for binaryStrLen in case input is 0

test/conversionOfNumbers/test_conversionOfNumbers.c

@@ -27,3 +27,15 @@ void test_binaryStringLengthOfInput5is3(){
     //assert
     TEST_ASSERT_EQUAL_INT(expected, result);
 }
+
+void test_binaryStringLengthOfInput0is1(){
+    //arrange
+    int result;
+    int expected = 1;
+
+    //act
+    result = binaryStrLen(0);
+
+    //assert
+    TEST_ASSERT_EQUAL_INT(expected, result);
+}