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package directory
import (
"os"
"path/filepath"
"reflect"
"sort"
"testing"
"github.com/stretchr/testify/require"
)
// Usage of an empty directory should be 0
func TestUsageEmpty(t *testing.T) {
usage, _ := Usage(t.TempDir())
expectSizeAndInodeCount(t, "empty directory", usage, &DiskUsage{
Size: 0,
InodeCount: 1,
})
}
// Usage of one empty file should be 0
func TestUsageEmptyFile(t *testing.T) {
dir := t.TempDir()
var file *os.File
var err error
if file, err = os.CreateTemp(dir, "file"); err != nil {
t.Fatalf("failed to create file: %s", err)
}
usage, _ := Usage(file.Name())
expectSizeAndInodeCount(t, "one file", usage, &DiskUsage{
Size: 0,
InodeCount: 1,
})
}
// Usage of a directory with one 5-byte file should be 5
func TestUsageNonemptyFile(t *testing.T) {
dir := t.TempDir()
var file *os.File
var err error
if file, err = os.CreateTemp(dir, "file"); err != nil {
t.Fatalf("failed to create file: %s", err)
}
d := []byte{97, 98, 99, 100, 101}
_, err = file.Write(d)
require.NoError(t, err)
usage, _ := Usage(dir)
expectSizeAndInodeCount(t, "directory with one 5-byte file", usage, &DiskUsage{
Size: 5,
InodeCount: 2,
})
}
// Usage of an empty directory should be 0
func TestUsageEmptyDirectory(t *testing.T) {
usage, _ := Usage(t.TempDir())
expectSizeAndInodeCount(t, "one directory", usage, &DiskUsage{
Size: 0,
InodeCount: 1,
})
}
// Usage of a directory with one empty directory should be 0
func TestUsageNestedDirectoryEmpty(t *testing.T) {
dir := t.TempDir()
if _, err := os.MkdirTemp(dir, "nested"); err != nil {
t.Fatalf("failed to create nested directory: %s", err)
}
usage, _ := Usage(dir)
expectSizeAndInodeCount(t, "directory with one empty directory", usage, &DiskUsage{
Size: 0,
InodeCount: 2,
})
}
// Test directory with 1 file and 1 empty directory
func TestUsageFileAndNestedDirectoryEmpty(t *testing.T) {
var err error
dir := t.TempDir()
if _, err = os.MkdirTemp(dir, "nested"); err != nil {
t.Fatalf("failed to create nested directory: %s", err)
}
var file *os.File
if file, err = os.CreateTemp(dir, "file"); err != nil {
t.Fatalf("failed to create file: %s", err)
}
d := []byte{100, 111, 99, 107, 101, 114}
_, err = file.Write(d)
require.NoError(t, err)
usage, _ := Usage(dir)
expectSizeAndInodeCount(t, "directory with 6-byte file and empty directory", usage, &DiskUsage{
Size: 6,
InodeCount: 3,
})
}
// Test directory with 1 file and 1 non-empty directory
func TestUsageFileAndNestedDirectoryNonempty(t *testing.T) {
var dirNested string
var err error
dir := t.TempDir()
if dirNested, err = os.MkdirTemp(dir, "nested"); err != nil {
t.Fatalf("failed to create nested directory: %s", err)
}
var file *os.File
if file, err = os.CreateTemp(dir, "file"); err != nil {
t.Fatalf("failed to create file: %s", err)
}
data := []byte{100, 111, 99, 107, 101, 114}
_, err = file.Write(data)
require.NoError(t, err)
var nestedFile *os.File
if nestedFile, err = os.CreateTemp(dirNested, "file"); err != nil {
t.Fatalf("failed to create file in nested directory: %s", err)
}
nestedData := []byte{100, 111, 99, 107, 101, 114}
_, err = nestedFile.Write(nestedData)
require.NoError(t, err)
usage, _ := Usage(dir)
expectSizeAndInodeCount(t, "directory with 6-byte file and nested directory with 6-byte file", usage, &DiskUsage{
Size: 12,
InodeCount: 4,
})
}
// Test migration of directory to a subdir underneath itself
func TestMoveToSubdir(t *testing.T) {
var subDir string
var err error
outerDir := t.TempDir()
if subDir, err = os.MkdirTemp(outerDir, "testSub"); err != nil {
t.Fatalf("failed to create subdirectory: %v", err)
}
// write 4 temp files in the outer dir to get moved
filesList := []string{"a", "b", "c", "d"}
for _, fName := range filesList {
if file, err := os.Create(filepath.Join(outerDir, fName)); err != nil {
t.Fatalf("couldn't create temp file %q: %v", fName, err)
} else {
_, err = file.WriteString(fName)
require.NoError(t, err)
file.Close()
}
}
if err = MoveToSubdir(outerDir, filepath.Base(subDir)); err != nil {
t.Fatalf("Error during migration of content to subdirectory: %v", err)
}
// validate that the files were moved to the subdirectory
infos, err := os.ReadDir(subDir)
if err != nil {
t.Fatal(err)
}
if len(infos) != 4 {
t.Fatalf("Should be four files in the subdir after the migration: actual length: %d", len(infos))
}
var results []string
for _, info := range infos {
results = append(results, info.Name())
}
sort.Strings(results)
if !reflect.DeepEqual(filesList, results) {
t.Fatalf("Results after migration do not equal list of files: expected: %v, got: %v", filesList, results)
}
}
// Test a non-existing directory
func TestUsageNonExistingDirectory(t *testing.T) {
if _, err := Usage("/thisdirectoryshouldnotexist/TestUsageNonExistingDirectory"); err == nil {
t.Fatalf("error is expected")
}
}
// A helper function that tests expectation of inode count and dir size against
// the found usage.
func expectSizeAndInodeCount(t *testing.T, testName string, current, expected *DiskUsage) {
t.Helper()
if current.Size != expected.Size {
t.Errorf("%s has size: %d, expected %d", testName, current.Size, expected.Size)
}
if current.InodeCount != expected.InodeCount {
t.Errorf("%s has inode count: %d, expected %d", testName, current.InodeCount, expected.InodeCount)
}
}
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