added test to convert 2 into binary string

test/conversionOfNumbers/test_conversionOfNumbers.c

@@ -0,0 +1,17 @@
+#include "unity.h"
+#include "conversionOfNumbers.h"
+
+void setUp(){}
+void tearDown(){}
+
+void test_convert2ToBinaryStr(){
+    //arrange
+    char* result;
+    char expected[] = "10";
+
+    //act
+    result = convertIntToBinaryStr(2);
+
+    //assert
+    TEST_ASSERT_EQUAL_STRING(expected, result);
+}