implement simple tests

utils_test.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestCheckValidIP(t *testing.T) {
+
+	var tests = []struct {
+		ip      string
+		want    bool
+		explain string
+	}{
+		{"127.0.0.1", true, "Valid IP"},
+		{"127.O.O.1", false, "Invalid IP"},
+	}
+
+	for _, test := range tests {
+		got := checkValidIP(test.ip)
+		if got != test.want {
+			t.Errorf("CheckValidIP(%q) = %v, want %v", test.ip, got, test.want)
+		}
+	}
+}