test: add UT and testcase

Author: JayceChant

commit-msg_test.go

@@ -0,0 +1,12 @@
+// commit-msg_test.go
+package main
+
+import (
+	"testing"
+)
+
+func TestGetMsg(t *testing.T) {
+	if msg := getMsg("testcase/sample.txt"); msg == "" {
+		t.Error("Failed!")
+	}
+}

testcase/sample.txt

@@ -0,0 +1,5 @@
+feat(scope): some new feat
+
+this is body
+
+and this is footer