/*
 * Copyright 2018 Xiaomi, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package common

import (
	"fmt"
	"io/ioutil"
	"testing"
)

func TestChardet(t *testing.T) {
	charsets := []string{
		"GB-18030",
		"UTF-8",
	}
	for _, c := range charsets {
		fileName := DevPath + "/common/testdata/chardet_" + c + ".txt"
		buf, err := ioutil.ReadFile(fileName)
		if err != nil {
			t.Errorf("ioutil.ReadFile %s, Error: %s", fileName, err.Error())
		}
		name := Chardet(buf)
		if name != c {
			t.Errorf("file: %s, Want: %s, Get: %s", fileName, c, name)
		}
	}
}

func TestRemoveBOM(t *testing.T) {
	fileName := DevPath + "/common/testdata/UTF-8.bom.sql"
	buf, err := ioutil.ReadFile(fileName)
	if err != nil {
		t.Errorf("ioutil.ReadFile %s, Error: %s", fileName, err.Error())
	}
	GoldenDiff(func() {
		fmt.Println(RemoveBOM(buf))
	}, t.Name(), update)
}

func TestCheckCharsetByBOM(t *testing.T) {
	fileName := DevPath + "/common/testdata/UTF-8.bom.sql"
	buf, err := ioutil.ReadFile(fileName)
	if err != nil {
		t.Errorf("ioutil.ReadFile %s, Error: %s", fileName, err.Error())
	}

	if CheckCharsetByBOM(buf) != "UTF-8" {
		t.Errorf("checkCharsetByBOM Want: UTF-8, Get: %s", CheckCharsetByBOM(buf))
	}
}