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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package templates

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestSubjectBodySeparator(t *testing.T) {
	test := func(input, subject, body string) {
		loc := mailSubjectSplit.FindIndex([]byte(input))
		if loc == nil {
			assert.Empty(t, subject, "no subject found, but one expected")
			assert.Equal(t, body, input)
		} else {
			assert.Equal(t, subject, string(input[0:loc[0]]))
			assert.Equal(t, body, string(input[loc[1]:]))
		}
	}

	test("Simple\n---------------\nCase",
		"Simple\n",
		"\nCase")
	test("Only\nBody",
		"",
		"Only\nBody")
	test("Minimal\n---\nseparator",
		"Minimal\n",
		"\nseparator")
	test("False --- separator",
		"",
		"False --- separator")
	test("False\n--- separator",
		"",
		"False\n--- separator")
	test("False ---\nseparator",
		"",
		"False ---\nseparator")
	test("With extra spaces\n-----   \t   \nBody",
		"With extra spaces\n",
		"\nBody")
	test("With leading spaces\n   -------\nOnly body",
		"",
		"With leading spaces\n   -------\nOnly body")
	test("Multiple\n---\n-------\n---\nSeparators",
		"Multiple\n",
		"\n-------\n---\nSeparators")
	test("Insuficient\n--\nSeparators",
		"",
		"Insuficient\n--\nSeparators")
}