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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package filepath_test

import (
        . "path/filepath"
        "runtime"
        "testing"
)

type MatchTest struct {
        pattern, s string
        match      bool
        err        error
}

var matchTests = []MatchTest{
        {"abc", "abc", true, nil},
        {"*", "abc", true, nil},
        {"*c", "abc", true, nil},
        {"a*", "a", true, nil},
        {"a*", "abc", true, nil},
        {"a*", "ab/c", false, nil},
        {"a*/b", "abc/b", true, nil},
        {"a*/b", "a/c/b", false, nil},
        {"a*b*c*d*e*/f", "axbxcxdxe/f", true, nil},
        {"a*b*c*d*e*/f", "axbxcxdxexxx/f", true, nil},
        {"a*b*c*d*e*/f", "axbxcxdxe/xxx/f", false, nil},
        {"a*b*c*d*e*/f", "axbxcxdxexxx/fff", false, nil},
        {"a*b?c*x", "abxbbxdbxebxczzx", true, nil},
        {"a*b?c*x", "abxbbxdbxebxczzy", false, nil},
        {"ab[c]", "abc", true, nil},
        {"ab[b-d]", "abc", true, nil},
        {"ab[e-g]", "abc", false, nil},
        {"ab[^c]", "abc", false, nil},
        {"ab[^b-d]", "abc", false, nil},
        {"ab[^e-g]", "abc", true, nil},
        {"a\\*b", "a*b", true, nil},
        {"a\\*b", "ab", false, nil},
        {"a?b", "a☺b", true, nil},
        {"a[^a]b", "a☺b", true, nil},
        {"a???b", "a☺b", false, nil},
        {"a[^a][^a][^a]b", "a☺b", false, nil},
        {"[a-ζ]*", "α", true, nil},
        {"*[a-ζ]", "A", false, nil},
        {"a?b", "a/b", false, nil},
        {"a*b", "a/b", false, nil},
        {"[\\]a]", "]", true, nil},
        {"[\\-]", "-", true, nil},
        {"[x\\-]", "x", true, nil},
        {"[x\\-]", "-", true, nil},
        {"[x\\-]", "z", false, nil},
        {"[\\-x]", "x", true, nil},
        {"[\\-x]", "-", true, nil},
        {"[\\-x]", "a", false, nil},
        {"[]a]", "]", false, ErrBadPattern},
        {"[-]", "-", false, ErrBadPattern},
        {"[x-]", "x", false, ErrBadPattern},
        {"[x-]", "-", false, ErrBadPattern},
        {"[x-]", "z", false, ErrBadPattern},
        {"[-x]", "x", false, ErrBadPattern},
        {"[-x]", "-", false, ErrBadPattern},
        {"[-x]", "a", false, ErrBadPattern},
        {"\\", "a", false, ErrBadPattern},
        {"[a-b-c]", "a", false, ErrBadPattern},
        {"*x", "xxx", true, nil},
}

func errp(e error) string {
        if e == nil {
                return "<nil>"
        }
        return e.Error()
}

func TestMatch(t *testing.T) {
        if runtime.GOOS == "windows" {
                // XXX: Don't pass for windows.
                return
        }
        for _, tt := range matchTests {
                ok, err := Match(tt.pattern, tt.s)
                if ok != tt.match || err != tt.err {
                        t.Errorf("Match(%#q, %#q) = %v, %q want %v, %q", tt.pattern, tt.s, ok, errp(err), tt.match, errp(tt.err))
                }
        }
}

// contains returns true if vector contains the string s.
func contains(vector []string, s string) bool {
        s = ToSlash(s)
        for _, elem := range vector {
                if elem == s {
                        return true
                }
        }
        return false
}

var globTests = []struct {
        pattern, result string
}{
        {"match.go", "match.go"},
        {"mat?h.go", "match.go"},
        {"*", "match.go"},
        // Does not work in gccgo test environment.
        // {"../*/match.go", "../filepath/match.go"},
}

func TestGlob(t *testing.T) {
        if runtime.GOOS == "windows" {
                // XXX: Don't pass for windows.
                return
        }
        for _, tt := range globTests {
                matches, err := Glob(tt.pattern)
                if err != nil {
                        t.Errorf("Glob error for %q: %s", tt.pattern, err)
                        continue
                }
                if !contains(matches, tt.result) {
                        t.Errorf("Glob(%#q) = %#v want %v", tt.pattern, matches, tt.result)
                }
        }
        for _, pattern := range []string{"no_match", "../*/no_match"} {
                matches, err := Glob(pattern)
                if err != nil {
                        t.Errorf("Glob error for %q: %s", pattern, err)
                        continue
                }
                if len(matches) != 0 {
                        t.Errorf("Glob(%#q) = %#v want []", pattern, matches)
                }
        }
}

func TestGlobError(t *testing.T) {
        _, err := Glob("[7]")
        if err != nil {
                t.Error("expected error for bad pattern; got none")
        }
}