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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 ioutil_test
import (
. "io/ioutil"
"os"
"testing"
)
func checkSize(t *testing.T, path string, size int64) {
dir, err := os.Stat(path)
if err != nil {
t.Fatalf("Stat %q (looking for size %d): %s", path, size, err)
}
if dir.Size != size {
t.Errorf("Stat %q: size %d want %d", path, dir.Size, size)
}
}
func TestReadFile(t *testing.T) {
filename := "rumpelstilzchen"
contents, err := ReadFile(filename)
if err == nil {
t.Fatalf("ReadFile %s: error expected, none found", filename)
}
filename = "ioutil_test.go"
contents, err = ReadFile(filename)
if err != nil {
t.Fatalf("ReadFile %s: %v", filename, err)
}
checkSize(t, filename, int64(len(contents)))
}
func TestWriteFile(t *testing.T) {
filename := "_test/rumpelstilzchen"
data := "Programming today is a race between software engineers striving to " +
"build bigger and better idiot-proof programs, and the Universe trying " +
"to produce bigger and better idiots. So far, the Universe is winning."
if err := WriteFile(filename, []byte(data), 0644); err != nil {
t.Fatalf("WriteFile %s: %v", filename, err)
}
contents, err := ReadFile(filename)
if err != nil {
t.Fatalf("ReadFile %s: %v", filename, err)
}
if string(contents) != data {
t.Fatalf("contents = %q\nexpected = %q", string(contents), data)
}
// cleanup
os.Remove(filename) // ignore error
}
func TestReadDir(t *testing.T) {
dirname := "rumpelstilzchen"
_, err := ReadDir(dirname)
if err == nil {
t.Fatalf("ReadDir %s: error expected, none found", dirname)
}
dirname = "."
list, err := ReadDir(dirname)
if err != nil {
t.Fatalf("ReadDir %s: %v", dirname, err)
}
foundTest := false
foundTestDir := false
for _, dir := range list {
switch {
case dir.IsRegular() && dir.Name == "ioutil_test.go":
foundTest = true
case dir.IsDirectory() && dir.Name == "_test":
foundTestDir = true
}
}
if !foundTest {
t.Fatalf("ReadDir %s: test file not found", dirname)
}
if !foundTestDir {
t.Fatalf("ReadDir %s: _test directory not found", dirname)
}
}
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