stat_test.go

Documentation: io/fs

		 1  // Copyright 2020 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package fs_test
		 6  
		 7  import (
		 8  	"fmt"
		 9  	. "io/fs"
		10  	"testing"
		11  )
		12  
		13  type statOnly struct{ StatFS }
		14  
		15  func (statOnly) Open(name string) (File, error) { return nil, ErrNotExist }
		16  
		17  func TestStat(t *testing.T) {
		18  	check := func(desc string, info FileInfo, err error) {
		19  		t.Helper()
		20  		if err != nil || info == nil || info.Mode() != 0456 {
		21  			infoStr := "<nil>"
		22  			if info != nil {
		23  				infoStr = fmt.Sprintf("FileInfo(Mode: %#o)", info.Mode())
		24  			}
		25  			t.Fatalf("Stat(%s) = %v, %v, want Mode:0456, nil", desc, infoStr, err)
		26  		}
		27  	}
		28  
		29  	// Test that Stat uses the method when present.
		30  	info, err := Stat(statOnly{testFsys}, "hello.txt")
		31  	check("statOnly", info, err)
		32  
		33  	// Test that Stat uses Open when the method is not present.
		34  	info, err = Stat(openOnly{testFsys}, "hello.txt")
		35  	check("openOnly", info, err)
		36  }
		37
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