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minio/cmd/os-readdir_test.go

263 lines
7.6 KiB

/*
* MinIO Cloud Storage, (C) 2016 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"runtime"
"sort"
"testing"
)
// Test to check for different input arguments.
func TestReadDirFail(t *testing.T) {
// Check non existent directory.
if _, err := readDir("/tmp/non-existent-directory"); err != errFileNotFound {
t.Fatalf("expected = %s, got: %s", errFileNotFound, err)
}
file := path.Join(os.TempDir(), "issue")
if err := ioutil.WriteFile(file, []byte(""), 0644); err != nil {
t.Fatal(err)
}
defer os.RemoveAll(file)
// Check if file is given.
if _, err := readDir(path.Join(file, "mydir")); err != errFileNotFound {
t.Fatalf("expected = %s, got: %s", errFileNotFound, err)
}
// Only valid for linux.
if runtime.GOOS == "linux" {
permDir := path.Join(os.TempDir(), "perm-dir")
if err := os.MkdirAll(permDir, os.FileMode(0200)); err != nil {
t.Fatal(err)
}
defer os.RemoveAll(permDir)
// Check if permission denied.
if _, err := readDir(permDir); err == nil {
t.Fatalf("expected = an error, got: nil")
}
}
}
// Represents data type for all the test results.
type result struct {
dir string
entries []string
}
func mustSetupDir(t *testing.T) string {
// Create unique test directory.
dir, err := ioutil.TempDir(globalTestTmpDir, "minio-list-dir")
if err != nil {
t.Fatalf("Unable to setup directory, %s", err)
}
return dir
}
// Test to read empty directory.
func setupTestReadDirEmpty(t *testing.T) (testResults []result) {
// Add empty entry slice for this test directory.
testResults = append(testResults, result{mustSetupDir(t), []string{}})
return testResults
}
// Test to read non-empty directory with only files.
func setupTestReadDirFiles(t *testing.T) (testResults []result) {
dir := mustSetupDir(t)
entries := []string{}
for i := 0; i < 10; i++ {
name := fmt.Sprintf("file-%d", i)
if err := ioutil.WriteFile(filepath.Join(dir, name), []byte{}, os.ModePerm); err != nil {
// For cleanup, its required to add these entries into test results.
testResults = append(testResults, result{dir, entries})
t.Fatalf("Unable to create file, %s", err)
}
entries = append(entries, name)
}
// Keep entries sorted for easier comparison.
sort.Strings(entries)
// Add entries slice for this test directory.
testResults = append(testResults, result{dir, entries})
return testResults
}
// Test to read non-empty directory with directories and files.
func setupTestReadDirGeneric(t *testing.T) (testResults []result) {
dir := mustSetupDir(t)
if err := os.MkdirAll(filepath.Join(dir, "mydir"), 0777); err != nil {
t.Fatalf("Unable to create prefix directory \"mydir\", %s", err)
}
entries := []string{"mydir/"}
for i := 0; i < 10; i++ {
name := fmt.Sprintf("file-%d", i)
if err := ioutil.WriteFile(filepath.Join(dir, "mydir", name), []byte{}, os.ModePerm); err != nil {
// For cleanup, its required to add these entries into test results.
testResults = append(testResults, result{dir, entries})
t.Fatalf("Unable to write file, %s", err)
}
}
// Keep entries sorted for easier comparison.
sort.Strings(entries)
// Add entries slice for this test directory.
testResults = append(testResults, result{dir, entries})
return testResults
}
// Test to read non-empty directory with symlinks.
func setupTestReadDirSymlink(t *testing.T) (testResults []result) {
if runtime.GOOS == globalWindowsOSName {
t.Skip("symlinks not available on windows")
return nil
}
dir := mustSetupDir(t)
entries := []string{}
for i := 0; i < 10; i++ {
name1 := fmt.Sprintf("file-%d", i)
name2 := fmt.Sprintf("file-%d", i+10)
if err := ioutil.WriteFile(filepath.Join(dir, name1), []byte{}, os.ModePerm); err != nil {
// For cleanup, its required to add these entries into test results.
testResults = append(testResults, result{dir, entries})
t.Fatalf("Unable to create a file, %s", err)
}
// Symlink will not be added to entries.
if err := os.Symlink(filepath.Join(dir, name1), filepath.Join(dir, name2)); err != nil {
t.Fatalf("Unable to create a symlink, %s", err)
}
// Add to entries.
entries = append(entries, name1)
// Symlinks are ignored.
}
if err := os.MkdirAll(filepath.Join(dir, "mydir"), 0777); err != nil {
t.Fatalf("Unable to create \"mydir\", %s", err)
}
entries = append(entries, "mydir/")
// Keep entries sorted for easier comparison.
sort.Strings(entries)
// Add entries slice for this test directory.
testResults = append(testResults, result{dir, entries})
return testResults
}
// checkResult - checks whether entries are got are same as expected entries.
func checkResult(expected []string, got []string) bool {
// If length of expected and got slice are different, the test actually failed.
if len(expected) != len(got) {
return false
}
for i := range expected {
// If entry in expected is not same as entry it got, the test is failed.
if expected[i] != got[i] {
return false
}
}
// expected and got have same entries.
return true
}
// teardown - cleans up test directories.
func teardown(testResults []result) {
for _, r := range testResults {
os.RemoveAll(r.dir)
}
}
// TestReadDir - test function to run various readDir() tests.
func TestReadDir(t *testing.T) {
var testResults []result
// Setup and capture test results for empty directory.
testResults = append(testResults, setupTestReadDirEmpty(t)...)
// Setup and capture test results for directory with only files.
testResults = append(testResults, setupTestReadDirFiles(t)...)
// Setup and capture test results for directory with files and directories.
testResults = append(testResults, setupTestReadDirGeneric(t)...)
// Setup and capture test results for directory with files and symlink.
testResults = append(testResults, setupTestReadDirSymlink(t)...)
// Remove all dirs once tests are over.
defer teardown(testResults)
// Validate all the results.
for _, r := range testResults {
if entries, err := readDir(r.dir); err != nil {
t.Fatal("failed to run test.", err)
} else {
// Keep entries sorted for easier comparison.
sort.Strings(entries)
if !checkResult(r.entries, entries) {
t.Fatalf("expected = %s, got: %s", r.entries, entries)
}
}
}
}
func TestReadDirN(t *testing.T) {
testCases := []struct {
numFiles int
n int
expectedNum int
}{
{0, 0, 0},
{0, 1, 0},
{1, 0, 0},
{0, -1, 0},
{1, -1, 1},
{10, -1, 10},
{1, 1, 1},
{2, 1, 1},
{10, 9, 9},
{10, 10, 10},
{10, 11, 10},
}
for i, testCase := range testCases {
dir := mustSetupDir(t)
for c := 1; c <= testCase.numFiles; c++ {
err := ioutil.WriteFile(filepath.Join(dir, fmt.Sprintf("%d", c)), []byte{}, os.ModePerm)
if err != nil {
os.RemoveAll(dir)
t.Fatalf("Unable to create a file, %s", err)
}
}
entries, err := readDirN(dir, testCase.n)
if err != nil {
os.RemoveAll(dir)
t.Fatalf("Unable to read entries, %s", err)
}
if len(entries) != testCase.expectedNum {
os.RemoveAll(dir)
t.Fatalf("Test %d: unexpected number of entries, waiting for %d, but found %d",
i+1, testCase.expectedNum, len(entries))
}
os.RemoveAll(dir)
}
}