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// Copyright 2020 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 fs_test
import (
"fmt"
. "io/fs"
"testing"
)
type statOnly struct{ StatFS }
func (statOnly) Open(name string) (File, error) { return nil, ErrNotExist }
func TestStat(t *testing.T) {
check := func(desc string, info FileInfo, err error) {
t.Helper()
if err != nil || info == nil || info.Mode() != 0456 {
infoStr := "<nil>"
if info != nil {
infoStr = fmt.Sprintf("FileInfo(Mode: %#o)", info.Mode())
}
t.Fatalf("Stat(%s) = %v, %v, want Mode:0456, nil", desc, infoStr, err)
}
}
// Test that Stat uses the method when present.
info, err := Stat(statOnly{testFsys}, "hello.txt")
check("statOnly", info, err)
// Test that Stat uses Open when the method is not present.
info, err = Stat(openOnly{testFsys}, "hello.txt")
check("openOnly", info, err)
}