add test_case

test_case/some_test.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestAdd(t *testing.T) {
+	a := int32(11)
+	b := int32(22)
+	expect := int32(33)
+	result := Add(a, b)
+	if expect != result {
+		t.Errorf("Error, expect: %d, actual: %d", expect, result)
+	}
+}