// Copyright 2013 Julien Schmidt. All rights reserved.
// Based on the path package, Copyright 2009 The Go Authors.
// Use of this source code is governed by a BSD-style license that can be found
// at https://github.com/julienschmidt/httprouter/blob/master/LICENSE

package gin

import (
	"runtime"
	"testing"

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

var cleanTests = []struct {
	path, result string
}{
	// Already clean
	{"/", "/"},
	{"/abc", "/abc"},
	{"/a/b/c", "/a/b/c"},
	{"/abc/", "/abc/"},
	{"/a/b/c/", "/a/b/c/"},

	// missing root
	{"", "/"},
	{"a/", "/a/"},
	{"abc", "/abc"},
	{"abc/def", "/abc/def"},
	{"a/b/c", "/a/b/c"},

	// Remove doubled slash
	{"//", "/"},
	{"/abc//", "/abc/"},
	{"/abc/def//", "/abc/def/"},
	{"/a/b/c//", "/a/b/c/"},
	{"/abc//def//ghi", "/abc/def/ghi"},
	{"//abc", "/abc"},
	{"///abc", "/abc"},
	{"//abc//", "/abc/"},

	// Remove . elements
	{".", "/"},
	{"./", "/"},
	{"/abc/./def", "/abc/def"},
	{"/./abc/def", "/abc/def"},
	{"/abc/.", "/abc/"},

	// Remove .. elements
	{"..", "/"},
	{"../", "/"},
	{"../../", "/"},
	{"../..", "/"},
	{"../../abc", "/abc"},
	{"/abc/def/ghi/../jkl", "/abc/def/jkl"},
	{"/abc/def/../ghi/../jkl", "/abc/jkl"},
	{"/abc/def/..", "/abc"},
	{"/abc/def/../..", "/"},
	{"/abc/def/../../..", "/"},
	{"/abc/def/../../..", "/"},
	{"/abc/def/../../../ghi/jkl/../../../mno", "/mno"},

	// Keep .. elements
	{"abc/..def", "/abc/..def"},
	{"abc/./...", "/abc/..."},
	{"abc/a../...", "/abc/a../..."},
	{"abc/a..z", "/abc/a..z"},

	// Combinations
	{"abc/./../def", "/def"},
	{"abc//./../def", "/def"},
	{"abc/../../././../def", "/def"},
	{"abc/../../././../...", "/..."},
	{"abc/./../..def", "/..def"},
	{"abc/../.../..def", "/.../..def"},
	{"abc/.//../..def", "/..def"},
}

func TestPathClean(t *testing.T) {
	for _, test := range cleanTests {
		assert.Equal(t, test.result, cleanPath(test.path))
		assert.Equal(t, test.result, cleanPath(test.result))
	}
}

func TestPathCleanMallocs(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping malloc count in short mode")
	}
	if runtime.GOMAXPROCS(0) > 1 {
		t.Log("skipping AllocsPerRun checks; GOMAXPROCS>1")
		return
	}

	for _, test := range cleanTests {
		allocs := testing.AllocsPerRun(100, func() { cleanPath(test.result) })
		assert.EqualValues(t, allocs, 0)
	}
}