tests: split example_filesystems into its own package

Running these tests from integration_tests' TestMain() was awkward
because they were run twice with unchanged settings.
integration_tests tests everything with OpenSSL and with native
Go crypto, but this does not take affect for the example filesystems.

To make this work, test_helpers is also split into its own package.

1 files changed, 0 insertions, 437 deletions

diff --git a/integration_tests/main_test.go b/integration_tests/main_test.go
deleted file mode 100644
index c7607ce..0000000
--- a/integration_tests/main_test.go
+++ /dev/null
@@ -1,437 +0,0 @@
-package integration_tests
-
-// File reading, writing, modification, truncate
-
-import (
-	"bytes"
-	"crypto/md5"
-	"encoding/hex"
-	"flag"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"runtime"
-	"sync"
-	"syscall"
-	"testing"
-)
-
-var plaintextNames bool
-
-// This is the entry point for the tests
-func TestMain(m *testing.M) {
-	var defaultonly bool
-	flag.BoolVar(&defaultonly, "defaultonly", false, "Only test default configuration (openssl=true, plaintextnames=false)")
-	flag.Parse()
-
-	if testing.Verbose() {
-		fmt.Println("***** Testing with OpenSSL")
-	}
-	resetTmpDir(false) // <- this also create gocryptfs.diriv
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey")
-	r := m.Run()
-	unmount(defaultPlainDir)
-
-	if r != 0 {
-		os.Exit(r)
-	}
-
-	if defaultonly {
-		os.Exit(r)
-	}
-
-	if testing.Verbose() {
-		fmt.Println("***** Testing with native Go crypto")
-	}
-	resetTmpDir(false)
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey", "--openssl=false")
-	r = m.Run()
-	unmount(defaultPlainDir)
-
-	if r != 0 {
-		os.Exit(r)
-	}
-
-	if testing.Verbose() {
-		fmt.Println("***** Testing \"--plaintextnames\"")
-	}
-	resetTmpDir(true) // do not create gocryptfs.diriv
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey", "--plaintextnames")
-	plaintextNames = true
-	r = m.Run()
-	unmount(defaultPlainDir)
-
-	if r != 0 {
-		os.Exit(r)
-	}
-
-	os.Exit(r)
-}
-
-// Write "n" zero bytes to filename "fn", read again, compare hash
-func testWriteN(t *testing.T, fn string, n int) string {
-	file, err := os.Create(defaultPlainDir + fn)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	d := make([]byte, n)
-	written, err := file.Write(d)
-	if err != nil || written != len(d) {
-		t.Errorf("err=\"%s\", written=%d", err, written)
-	}
-	err = file.Close()
-	if err != nil {
-		t.Error(err)
-	}
-
-	verifySize(t, defaultPlainDir+fn, n)
-
-	bin := md5.Sum(d)
-	hashWant := hex.EncodeToString(bin[:])
-
-	hashActual := md5fn(defaultPlainDir + fn)
-
-	if hashActual != hashWant {
-		t.Errorf("Wrong content, hashWant=%s hashActual=%s", hashWant, hashActual)
-	}
-
-	return hashActual
-}
-
-func TestWrite10(t *testing.T) {
-	testWriteN(t, "10", 10)
-}
-
-func TestWrite100(t *testing.T) {
-	testWriteN(t, "100", 100)
-}
-
-func TestWrite1M(t *testing.T) {
-	testWriteN(t, "1M", 1024*1024)
-}
-
-func TestWrite1Mx100(t *testing.T) {
-	hashWant := testWriteN(t, "1Mx100", 1024*1024)
-	// Read and check 100 times to catch race conditions
-	var i int
-	for i = 0; i < 100; i++ {
-		hashActual := md5fn(defaultPlainDir + "1M")
-		if hashActual != hashWant {
-			fmt.Printf("Read corruption in loop # %d\n", i)
-			t.FailNow()
-		} else {
-			//fmt.Print(".")
-		}
-	}
-}
-
-func TestTruncate(t *testing.T) {
-	fn := defaultPlainDir + "truncate"
-	file, err := os.Create(fn)
-	if err != nil {
-		t.FailNow()
-	}
-	// Grow to two blocks
-	file.Truncate(7000)
-	verifySize(t, fn, 7000)
-	if md5fn(fn) != "95d4ec7038e3e4fdbd5f15c34c3f0b34" {
-		t.Errorf("wrong content")
-	}
-	// Shrink - needs RMW
-	file.Truncate(6999)
-	verifySize(t, fn, 6999)
-	if md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" {
-		t.Errorf("wrong content")
-	}
-	// Shrink to one partial block
-	file.Truncate(465)
-	verifySize(t, fn, 465)
-	if md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" {
-		t.Errorf("wrong content")
-	}
-	// Grow to exactly one block
-	file.Truncate(4096)
-	verifySize(t, fn, 4096)
-	if md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" {
-		t.Errorf("wrong content")
-	}
-}
-
-func TestAppend(t *testing.T) {
-	fn := defaultPlainDir + "append"
-	file, err := os.Create(fn)
-	if err != nil {
-		t.FailNow()
-	}
-	data := []byte("testdata123456789") // length 17
-	var buf bytes.Buffer
-	var hashWant string
-	for i := 0; i <= 500; i++ {
-		file.Write(data)
-		buf.Write(data)
-		bin := md5.Sum(buf.Bytes())
-		hashWant = hex.EncodeToString(bin[:])
-		hashActual := md5fn(fn)
-		if hashWant != hashActual {
-			t.FailNow()
-		}
-	}
-
-	// Overwrite with the same data
-	// Hash must stay the same
-	file.Seek(0, 0)
-	for i := 0; i <= 500; i++ {
-		file.Write(data)
-		hashActual := md5fn(fn)
-		if hashWant != hashActual {
-			t.FailNow()
-		}
-	}
-}
-
-// Create a file with holes by writing to offset 0 (block #0) and
-// offset 4096 (block #1).
-func TestFileHoles(t *testing.T) {
-	fn := defaultPlainDir + "fileholes"
-	file, err := os.Create(fn)
-	if err != nil {
-		t.Errorf("file create failed")
-	}
-	foo := []byte("foo")
-	file.Write(foo)
-	file.WriteAt(foo, 4096)
-	_, err = ioutil.ReadFile(fn)
-	if err != nil {
-		t.Error(err)
-	}
-}
-
-// sContains - does the slice of strings "haystack" contain "needle"?
-func sContains(haystack []string, needle string) bool {
-	for _, element := range haystack {
-		if element == needle {
-			return true
-		}
-	}
-	return false
-}
-
-func TestRmwRace(t *testing.T) {
-
-	runtime.GOMAXPROCS(10)
-
-	fn := defaultPlainDir + "rmwrace"
-	f1, err := os.Create(fn)
-	if err != nil {
-		t.Fatalf("file create failed")
-	}
-	f2, err := os.Create(fn)
-	if err != nil {
-		t.Fatalf("file create failed")
-	}
-
-	oldBlock := bytes.Repeat([]byte("o"), 4096)
-
-	newBlock := bytes.Repeat([]byte("n"), 4096)
-
-	shortBlock := bytes.Repeat([]byte("s"), 16)
-
-	mergedBlock := make([]byte, 4096)
-	copy(mergedBlock, newBlock)
-	copy(mergedBlock[4080:], shortBlock)
-
-	goodMd5 := make(map[string]int)
-
-	for i := 0; i < 1000; i++ {
-		// Reset to [ooooooooo]
-		_, err = f1.WriteAt(oldBlock, 0)
-		if err != nil {
-			t.Fatalf("Write failed")
-		}
-
-		var wg sync.WaitGroup
-		wg.Add(2)
-
-		// Write to the end of the file, [....ssss]
-		go func() {
-			f1.WriteAt(shortBlock, 4080)
-			wg.Done()
-		}()
-
-		// Overwrite to [nnnnnnn]
-		go func() {
-			f2.WriteAt(newBlock, 0)
-			wg.Done()
-		}()
-
-		wg.Wait()
-
-		// The file should be either:
-		// [nnnnnnnnnn] (md5: 6c1660fdabccd448d1359f27b3db3c99) or
-		// [nnnnnnssss] (md5: da885006a6a284530a427c73ce1e5c32)
-		// but it must not be
-		// [oooooossss]
-
-		buf, _ := ioutil.ReadFile(fn)
-		m := md5hex(buf)
-		goodMd5[m] = goodMd5[m] + 1
-
-		/*
-			if m == "6c1660fdabccd448d1359f27b3db3c99" {
-				fmt.Println(hex.Dump(buf))
-				t.FailNow()
-			}
-		*/
-	}
-	if testing.Verbose() {
-		fmt.Println(goodMd5)
-	}
-}
-
-// With "--plaintextnames", the name "/gocryptfs.conf" is reserved.
-// Otherwise there should be no restrictions.
-func TestFiltered(t *testing.T) {
-	filteredFile := defaultPlainDir + "gocryptfs.conf"
-	file, err := os.Create(filteredFile)
-	if plaintextNames == true && err == nil {
-		t.Errorf("should have failed but didn't")
-	} else if plaintextNames == false && err != nil {
-		t.Error(err)
-	}
-	file.Close()
-
-	err = os.Remove(filteredFile)
-	if plaintextNames == true && err == nil {
-		t.Errorf("should have failed but didn't")
-	} else if plaintextNames == false && err != nil {
-		t.Error(err)
-	}
-}
-
-func TestFilenameEncryption(t *testing.T) {
-	file, err := os.Create(defaultPlainDir + "TestFilenameEncryption.txt")
-	file.Close()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = os.Stat(defaultCipherDir + "TestFilenameEncryption.txt")
-	if plaintextNames == true && err != nil {
-		t.Errorf("plaintextnames not working: %v", err)
-	} else if plaintextNames == false && err == nil {
-		t.Errorf("file name encryption not working")
-	}
-}
-
-// Test Mkdir and Rmdir
-func TestMkdirRmdir(t *testing.T) {
-	testMkdirRmdir(t, defaultPlainDir)
-}
-
-// Test Rename
-func TestRename(t *testing.T) {
-	testRename(t, defaultPlainDir)
-}
-
-// Overwrite an empty directory with another directory
-func TestDirOverwrite(t *testing.T) {
-	dir1 := defaultPlainDir + "DirOverwrite1"
-	dir2 := defaultPlainDir + "DirOverwrite2"
-	err := os.Mkdir(dir1, 0777)
-	if err != nil {
-		t.Fatal(err)
-	}
-	err = os.Mkdir(dir2, 0777)
-	if err != nil {
-		t.Fatal(err)
-	}
-	err = os.Rename(dir1, dir2)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestLongNames(t *testing.T) {
-	fi, err := ioutil.ReadDir(defaultCipherDir)
-	if err != nil {
-		t.Fatal(err)
-	}
-	cnt1 := len(fi)
-	wd := defaultPlainDir
-	// Create file with long name
-	n255x := string(bytes.Repeat([]byte("x"), 255))
-	f, err := os.Create(wd + n255x)
-	if err != nil {
-		t.Fatalf("Could not create n255x: %v", err)
-	}
-	f.Close()
-	if !verifyExistence(wd + n255x) {
-		t.Errorf("n255x is not in directory listing")
-	}
-	// Rename long to long
-	n255y := string(bytes.Repeat([]byte("y"), 255))
-	err = os.Rename(wd+n255x, wd+n255y)
-	if err != nil {
-		t.Fatalf("Could not rename n255x to n255y: %v", err)
-	}
-	if !verifyExistence(wd + n255y) {
-		t.Errorf("n255y is not in directory listing")
-	}
-	// Rename long to short
-	err = os.Rename(wd+n255y, wd+"short")
-	if err != nil {
-		t.Fatalf("Could not rename n255y to short: %v", err)
-	}
-	if !verifyExistence(wd + "short") {
-		t.Errorf("short is not in directory listing")
-	}
-	// Rename short to long
-	err = os.Rename(wd+"short", wd+n255x)
-	if err != nil {
-		t.Fatalf("Could not rename short to n255x: %v", err)
-	}
-	if !verifyExistence(wd + n255x) {
-		t.Errorf("255x is not in directory listing II")
-	}
-	// Unlink
-	err = syscall.Unlink(wd + n255x)
-	if err != nil {
-		t.Fatalf("Could not unlink n255x: %v", err)
-	}
-	if verifyExistence(wd + n255x) {
-		t.Errorf("n255x still there after unlink")
-	}
-	// Long symlink
-	n255s := string(bytes.Repeat([]byte("s"), 255))
-	err = os.Symlink("/etc/motd", wd+n255s)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !verifyExistence(wd + n255s) {
-		t.Errorf("n255s is not in directory listing")
-	}
-	err = syscall.Unlink(wd + n255s)
-	if err != nil {
-		t.Error(err)
-	}
-	// Long dir
-	n255d := string(bytes.Repeat([]byte("d"), 255))
-	err = os.Mkdir(wd+n255d, 0777)
-	if err != nil {
-		t.Fatal(err)
-	}
-	err = syscall.Rmdir(wd + n255d)
-	if err != nil {
-		t.Error(err)
-	}
-	// Check for orphaned files
-	fi, err = ioutil.ReadDir(defaultCipherDir)
-	if err != nil {
-		t.Fatal(err)
-	}
-	cnt2 := len(fi)
-	if cnt1 != cnt2 {
-		t.Errorf("Leftover files, cnt1=%d cnt2=%d", cnt1, cnt2)
-	}
-}