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.

43 files changed, 145 insertions, 130 deletions

diff --git a/benchmark-builtin.bash b/benchmark-synthetic.bash
index 145fcfd..8c5c9ce 100755
--- a/benchmark-builtin.bash
+++ b/benchmark-synthetic.bash
@@ -7,4 +7,4 @@ set -eu
 
 source build.bash
 
-go test ./integration_tests -bench=. -defaultonly
+go test ./tests/integration_tests -bench=. -defaultonly
diff --git a/integration_tests/example_filesystems/abs b/tests/example_filesystems/abs
index e1740fa..e1740fa 120000
--- a/integration_tests/example_filesystems/abs
+++ b/tests/example_filesystems/abs
diff --git a/integration_tests/example_filesystems_test.go b/tests/example_filesystems/example_filesystems_test.go
index 68191f8..7517bc5 100644
--- a/integration_tests/example_filesystems_test.go
+++ b/tests/example_filesystems/example_filesystems_test.go
@@ -1,4 +1,4 @@
-package integration_tests
+package example_filesystems
 
 // Mount example filesystems and check that the file "status.txt" is there
 
@@ -7,10 +7,17 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 const statusTxtContent = "It works!\n"
 
+func TestMain(m *testing.M) {
+	test_helpers.ResetTmpDir(true)
+	m.Run()
+}
+
 // checkExampleFS - verify that "dir" contains the expected test files
 func checkExampleFS(t *testing.T, dir string) {
 	// Read regular file
@@ -42,8 +49,8 @@ func checkExampleFS(t *testing.T, dir string) {
 		t.Errorf("Unexpected link target: %s\n", target)
 	}
 	// Test directory operations
-	testRename(t, dir)
-	testMkdirRmdir(t, dir)
+	test_helpers.TestRename(t, dir)
+	test_helpers.TestMkdirRmdir(t, dir)
 }
 
 // checkExampleFSLongnames - verify that "dir" contains the expected test files
@@ -70,19 +77,19 @@ func checkExampleFSLongnames(t *testing.T, dir string) {
 // Test example_filesystems/v0.4
 // with password mount and -masterkey mount
 func TestExampleFSv04(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsV04/"
-	cDir := "example_filesystems/v0.4"
+	pDir := test_helpers.TmpDir + "TestExampleFsV04/"
+	cDir := "v0.4"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "74676e34-0b47c145-00dac61a-17a92316-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "74676e34-0b47c145-00dac61a-17a92316-"+
 		"bb57044c-e205b71f-65f4fdca-7cabd4b3", "-diriv=false", "-emenames=false", "-gcmiv128=false")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
@@ -92,19 +99,19 @@ func TestExampleFSv04(t *testing.T) {
 // Test example_filesystems/v0.5
 // with password mount and -masterkey mount
 func TestExampleFSv05(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsV05/"
-	cDir := "example_filesystems/v0.5"
+	pDir := test_helpers.TmpDir + "TestExampleFsV05/"
+	cDir := "v0.5"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "199eae55-36bff4af-83b9a3a2-4fa16f65-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "199eae55-36bff4af-83b9a3a2-4fa16f65-"+
 		"1549ccdb-2d08d1f0-b1b26965-1b61f896", "-emenames=false", "-gcmiv128=false")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
@@ -114,19 +121,19 @@ func TestExampleFSv05(t *testing.T) {
 // Test example_filesystems/v0.6
 // with password mount and -masterkey mount
 func TestExampleFSv06(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsV06/"
-	cDir := "example_filesystems/v0.6"
+	pDir := test_helpers.TmpDir + "TestExampleFsV06/"
+	cDir := "v0.6"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "7bc8deb0-5fc894ef-a093da43-61561a81-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "7bc8deb0-5fc894ef-a093da43-61561a81-"+
 		"0e8dee83-fdc056a4-937c37dd-9df5c520", "-gcmiv128=false")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
@@ -138,19 +145,19 @@ func TestExampleFSv06(t *testing.T) {
 // v0.6 changed the file name handling a lot, hence the explicit test case for
 // plaintextnames.
 func TestExampleFSv06PlaintextNames(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsV06PlaintextNames/"
-	cDir := "example_filesystems/v0.6-plaintextnames"
+	pDir := test_helpers.TmpDir + "TestExampleFsV06PlaintextNames/"
+	cDir := "v0.6-plaintextnames"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "f4690202-595e4593-64c4f7e0-4dddd7d1-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "f4690202-595e4593-64c4f7e0-4dddd7d1-"+
 		"303147f9-0ca8aea2-966341a7-52ea8ae9", "-plaintextnames", "-gcmiv128=false")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
@@ -161,19 +168,19 @@ func TestExampleFSv06PlaintextNames(t *testing.T) {
 // with password mount and -masterkey mount
 // v0.7 adds 128 bit GCM IVs
 func TestExampleFSv07(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsV07/"
-	cDir := "example_filesystems/v0.7"
+	pDir := test_helpers.TmpDir + "TestExampleFsV07/"
+	cDir := "v0.7"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "ed7f6d83-40cce86c-0e7d79c2-a9438710-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "ed7f6d83-40cce86c-0e7d79c2-a9438710-"+
 		"575221bf-30a0eb60-2821fa8f-7f3123bf")
 	checkExampleFS(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
@@ -183,19 +190,19 @@ func TestExampleFSv07(t *testing.T) {
 // Test example_filesystems/v0.9
 // (gocryptfs v0.9 introduced long file name support)
 func TestExampleFSv09(t *testing.T) {
-	cDir := "example_filesystems/v0.9"
-	pDir := tmpDir + "TestExampleFsV09/"
+	cDir := "v0.9"
+	pDir := test_helpers.TmpDir + "TestExampleFsV09/"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	mountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
 	checkExampleFSLongnames(t, pDir)
-	unmount(pDir)
-	mountOrFatal(t, cDir, pDir, "-masterkey", "1cafe3f4-bc316466-2214c47c-ecd89bf3-"+
+	test_helpers.Unmount(pDir)
+	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey", "1cafe3f4-bc316466-2214c47c-ecd89bf3-"+
 		"4e078fe4-f5faeea7-8b7cab02-884f5e1c")
 	checkExampleFSLongnames(t, pDir)
-	unmount(pDir)
+	test_helpers.Unmount(pDir)
 	err = os.Remove(pDir)
 	if err != nil {
 		t.Error(err)
diff --git a/integration_tests/example_filesystems/rel b/tests/example_filesystems/rel
index 8279c75..8279c75 120000
--- a/integration_tests/example_filesystems/rel
+++ b/tests/example_filesystems/rel
diff --git a/integration_tests/example_filesystems/status.txt b/tests/example_filesystems/status.txt
index 68300b8..68300b8 100644
--- a/integration_tests/example_filesystems/status.txt
+++ b/tests/example_filesystems/status.txt
diff --git a/integration_tests/example_filesystems/v0.4/3-HZSwv99agoWgTErV0YFQ== b/tests/example_filesystems/v0.4/3-HZSwv99agoWgTErV0YFQ==
index 5d0af82..5d0af82 100644
--- a/integration_tests/example_filesystems/v0.4/3-HZSwv99agoWgTErV0YFQ==
+++ b/tests/example_filesystems/v0.4/3-HZSwv99agoWgTErV0YFQ==
diff --git a/integration_tests/example_filesystems/v0.4/6hL2fPVB2aMSh4-UoDn5Kw== b/tests/example_filesystems/v0.4/6hL2fPVB2aMSh4-UoDn5Kw==
index 31b9013..31b9013 120000
--- a/integration_tests/example_filesystems/v0.4/6hL2fPVB2aMSh4-UoDn5Kw==
+++ b/tests/example_filesystems/v0.4/6hL2fPVB2aMSh4-UoDn5Kw==
diff --git a/integration_tests/example_filesystems/v0.4/TBIgdfhDKwkXVTnWLVzFSg== b/tests/example_filesystems/v0.4/TBIgdfhDKwkXVTnWLVzFSg==
index 7a15694..7a15694 120000
--- a/integration_tests/example_filesystems/v0.4/TBIgdfhDKwkXVTnWLVzFSg==
+++ b/tests/example_filesystems/v0.4/TBIgdfhDKwkXVTnWLVzFSg==
diff --git a/integration_tests/example_filesystems/v0.4/gocryptfs.conf b/tests/example_filesystems/v0.4/gocryptfs.conf
index 354b4bb..354b4bb 100644
--- a/integration_tests/example_filesystems/v0.4/gocryptfs.conf
+++ b/tests/example_filesystems/v0.4/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.5/AOtl_i4xQWDyG0_zUqntOw== b/tests/example_filesystems/v0.5/AOtl_i4xQWDyG0_zUqntOw==
index 7c52a28..7c52a28 120000
--- a/integration_tests/example_filesystems/v0.5/AOtl_i4xQWDyG0_zUqntOw==
+++ b/tests/example_filesystems/v0.5/AOtl_i4xQWDyG0_zUqntOw==
diff --git a/integration_tests/example_filesystems/v0.5/Pf35wlWlf43N68EbhIgTcQ== b/tests/example_filesystems/v0.5/Pf35wlWlf43N68EbhIgTcQ==
index 596cc3d..596cc3d 120000
--- a/integration_tests/example_filesystems/v0.5/Pf35wlWlf43N68EbhIgTcQ==
+++ b/tests/example_filesystems/v0.5/Pf35wlWlf43N68EbhIgTcQ==
diff --git a/integration_tests/example_filesystems/v0.5/gocryptfs.conf b/tests/example_filesystems/v0.5/gocryptfs.conf
index f839664..f839664 100644
--- a/integration_tests/example_filesystems/v0.5/gocryptfs.conf
+++ b/tests/example_filesystems/v0.5/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.5/gocryptfs.diriv b/tests/example_filesystems/v0.5/gocryptfs.diriv
index 3670294..3670294 100644
--- a/integration_tests/example_filesystems/v0.5/gocryptfs.diriv
+++ b/tests/example_filesystems/v0.5/gocryptfs.diriv
diff --git a/integration_tests/example_filesystems/v0.5/j2BpGUT5kOtia20PWQ2rEA== b/tests/example_filesystems/v0.5/j2BpGUT5kOtia20PWQ2rEA==
index 1ad2358..1ad2358 100644
--- a/integration_tests/example_filesystems/v0.5/j2BpGUT5kOtia20PWQ2rEA==
+++ b/tests/example_filesystems/v0.5/j2BpGUT5kOtia20PWQ2rEA==
diff --git a/integration_tests/example_filesystems/v0.6-plaintextnames/abs b/tests/example_filesystems/v0.6-plaintextnames/abs
index e1740fa..e1740fa 120000
--- a/integration_tests/example_filesystems/v0.6-plaintextnames/abs
+++ b/tests/example_filesystems/v0.6-plaintextnames/abs
diff --git a/integration_tests/example_filesystems/v0.6-plaintextnames/gocryptfs.conf b/tests/example_filesystems/v0.6-plaintextnames/gocryptfs.conf
index 257b7ee..257b7ee 100644
--- a/integration_tests/example_filesystems/v0.6-plaintextnames/gocryptfs.conf
+++ b/tests/example_filesystems/v0.6-plaintextnames/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.6-plaintextnames/rel b/tests/example_filesystems/v0.6-plaintextnames/rel
index 8279c75..8279c75 120000
--- a/integration_tests/example_filesystems/v0.6-plaintextnames/rel
+++ b/tests/example_filesystems/v0.6-plaintextnames/rel
diff --git a/integration_tests/example_filesystems/v0.6-plaintextnames/status.txt b/tests/example_filesystems/v0.6-plaintextnames/status.txt
index e5b62fb..e5b62fb 100644
--- a/integration_tests/example_filesystems/v0.6-plaintextnames/status.txt
+++ b/tests/example_filesystems/v0.6-plaintextnames/status.txt
diff --git a/integration_tests/example_filesystems/v0.6/9pOs0yjJI5A67pv5CnqomQ== b/tests/example_filesystems/v0.6/9pOs0yjJI5A67pv5CnqomQ==
index 11b0234..11b0234 120000
--- a/integration_tests/example_filesystems/v0.6/9pOs0yjJI5A67pv5CnqomQ==
+++ b/tests/example_filesystems/v0.6/9pOs0yjJI5A67pv5CnqomQ==
diff --git a/integration_tests/example_filesystems/v0.6/G79Zdu41H3bgwdaQlrz-dg== b/tests/example_filesystems/v0.6/G79Zdu41H3bgwdaQlrz-dg==
index b72a393..b72a393 120000
--- a/integration_tests/example_filesystems/v0.6/G79Zdu41H3bgwdaQlrz-dg==
+++ b/tests/example_filesystems/v0.6/G79Zdu41H3bgwdaQlrz-dg==
diff --git a/integration_tests/example_filesystems/v0.6/RuYvQG_raW_-H_LcyJC4LQ== b/tests/example_filesystems/v0.6/RuYvQG_raW_-H_LcyJC4LQ==
index 5821d87..5821d87 100644
--- a/integration_tests/example_filesystems/v0.6/RuYvQG_raW_-H_LcyJC4LQ==
+++ b/tests/example_filesystems/v0.6/RuYvQG_raW_-H_LcyJC4LQ==
diff --git a/integration_tests/example_filesystems/v0.6/gocryptfs.conf b/tests/example_filesystems/v0.6/gocryptfs.conf
index 1c72781..1c72781 100644
--- a/integration_tests/example_filesystems/v0.6/gocryptfs.conf
+++ b/tests/example_filesystems/v0.6/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.6/gocryptfs.diriv b/tests/example_filesystems/v0.6/gocryptfs.diriv
index ec9f503..ec9f503 100644
--- a/integration_tests/example_filesystems/v0.6/gocryptfs.diriv
+++ b/tests/example_filesystems/v0.6/gocryptfs.diriv
diff --git a/integration_tests/example_filesystems/v0.7/4tRF1LdULRFLiXwfze671Q== b/tests/example_filesystems/v0.7/4tRF1LdULRFLiXwfze671Q==
index f06d136..f06d136 120000
--- a/integration_tests/example_filesystems/v0.7/4tRF1LdULRFLiXwfze671Q==
+++ b/tests/example_filesystems/v0.7/4tRF1LdULRFLiXwfze671Q==
diff --git a/integration_tests/example_filesystems/v0.7/RWPXmXkRFrWw1aOpq7C-NQ== b/tests/example_filesystems/v0.7/RWPXmXkRFrWw1aOpq7C-NQ==
index 6ddcd1e..6ddcd1e 100644
--- a/integration_tests/example_filesystems/v0.7/RWPXmXkRFrWw1aOpq7C-NQ==
+++ b/tests/example_filesystems/v0.7/RWPXmXkRFrWw1aOpq7C-NQ==
diff --git a/integration_tests/example_filesystems/v0.7/dwPcZNei4HN4qPA6FxoG_A== b/tests/example_filesystems/v0.7/dwPcZNei4HN4qPA6FxoG_A==
index c0c731f..c0c731f 120000
--- a/integration_tests/example_filesystems/v0.7/dwPcZNei4HN4qPA6FxoG_A==
+++ b/tests/example_filesystems/v0.7/dwPcZNei4HN4qPA6FxoG_A==
diff --git a/integration_tests/example_filesystems/v0.7/gocryptfs.conf b/tests/example_filesystems/v0.7/gocryptfs.conf
index 80c2673..80c2673 100644
--- a/integration_tests/example_filesystems/v0.7/gocryptfs.conf
+++ b/tests/example_filesystems/v0.7/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.7/gocryptfs.diriv b/tests/example_filesystems/v0.7/gocryptfs.diriv
index 3adef3c..3adef3c 100644
--- a/integration_tests/example_filesystems/v0.7/gocryptfs.diriv
+++ b/tests/example_filesystems/v0.7/gocryptfs.diriv
diff --git a/integration_tests/example_filesystems/v0.9/00msNUi5h5aKMX_f-4pBhA== b/tests/example_filesystems/v0.9/00msNUi5h5aKMX_f-4pBhA==
index c717734..c717734 120000
--- a/integration_tests/example_filesystems/v0.9/00msNUi5h5aKMX_f-4pBhA==
+++ b/tests/example_filesystems/v0.9/00msNUi5h5aKMX_f-4pBhA==
diff --git a/integration_tests/example_filesystems/v0.9/R83PhW-BBA_q4rPYD7dEMg== b/tests/example_filesystems/v0.9/R83PhW-BBA_q4rPYD7dEMg==
index 1bc4a81..1bc4a81 100644
--- a/integration_tests/example_filesystems/v0.9/R83PhW-BBA_q4rPYD7dEMg==
+++ b/tests/example_filesystems/v0.9/R83PhW-BBA_q4rPYD7dEMg==
diff --git a/integration_tests/example_filesystems/v0.9/gocryptfs.conf b/tests/example_filesystems/v0.9/gocryptfs.conf
index 4d9b089..4d9b089 100644
--- a/integration_tests/example_filesystems/v0.9/gocryptfs.conf
+++ b/tests/example_filesystems/v0.9/gocryptfs.conf
diff --git a/integration_tests/example_filesystems/v0.9/gocryptfs.diriv b/tests/example_filesystems/v0.9/gocryptfs.diriv
index 47d97ee..47d97ee 100644
--- a/integration_tests/example_filesystems/v0.9/gocryptfs.diriv
+++ b/tests/example_filesystems/v0.9/gocryptfs.diriv
diff --git a/integration_tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ= b/tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=
index 78eb3ff..78eb3ff 100644
--- a/integration_tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=
+++ b/tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=
diff --git a/integration_tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=.name b/tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=.name
index 535cee7..535cee7 100644
--- a/integration_tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=.name
+++ b/tests/example_filesystems/v0.9/gocryptfs.longname.y4J-w3LBX165Mn_pGdDRY7Gb6EgHcTrdWjME3WGu-CQ=.name
diff --git a/integration_tests/example_filesystems/v0.9/hwE1RKIXtF8hmQMvEXSTtg== b/tests/example_filesystems/v0.9/hwE1RKIXtF8hmQMvEXSTtg==
index 4190a7e..4190a7e 120000
--- a/integration_tests/example_filesystems/v0.9/hwE1RKIXtF8hmQMvEXSTtg==
+++ b/tests/example_filesystems/v0.9/hwE1RKIXtF8hmQMvEXSTtg==
diff --git a/integration_tests/cli_test.go b/tests/integration_tests/cli_test.go
index 062a90d..15bd063 100644
--- a/integration_tests/cli_test.go
+++ b/tests/integration_tests/cli_test.go
@@ -9,16 +9,18 @@ import (
 
 	"github.com/rfjakob/gocryptfs/internal/configfile"
 	"github.com/rfjakob/gocryptfs/internal/nametransform"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 // Test -init flag
 func TestInit(t *testing.T) {
-	dir := tmpDir + "TestInit/"
+	dir := test_helpers.TmpDir + "TestInit/"
 	err := os.Mkdir(dir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	cmd := exec.Command(gocryptfsBinary, "-init", "-extpass", "echo test", "-scryptn=10", dir)
+	cmd := exec.Command(test_helpers.GocryptfsBinary, "-init", "-extpass", "echo test", "-scryptn=10", dir)
 	if testing.Verbose() {
 		cmd.Stdout = os.Stdout
 		cmd.Stderr = os.Stderr
@@ -33,7 +35,7 @@ func TestInit(t *testing.T) {
 	}
 
 	// Test -passwd
-	cmd2 := exec.Command(gocryptfsBinary, "-passwd", "-extpass", "echo test", dir)
+	cmd2 := exec.Command(test_helpers.GocryptfsBinary, "-passwd", "-extpass", "echo test", dir)
 	if testing.Verbose() {
 		cmd2.Stdout = os.Stdout
 		cmd2.Stderr = os.Stderr
@@ -46,13 +48,13 @@ func TestInit(t *testing.T) {
 
 // Test -init & -config flag
 func TestInitConfig(t *testing.T) {
-	dir := tmpDir + "TestInitConfig/"
-	config := tmpDir + "TestInitConfig.conf"
+	dir := test_helpers.TmpDir + "TestInitConfig/"
+	config := test_helpers.TmpDir + "TestInitConfig.conf"
 	err := os.Mkdir(dir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	cmd := exec.Command(gocryptfsBinary, "-init", "-extpass", "echo test",
+	cmd := exec.Command(test_helpers.GocryptfsBinary, "-init", "-extpass", "echo test",
 		"-config", config, "-scryptn=10", dir)
 	if testing.Verbose() {
 		cmd.Stdout = os.Stdout
@@ -68,7 +70,7 @@ func TestInitConfig(t *testing.T) {
 	}
 
 	// Test -passwd & -config
-	cmd2 := exec.Command(gocryptfsBinary, "-passwd", "-extpass", "echo test",
+	cmd2 := exec.Command(test_helpers.GocryptfsBinary, "-passwd", "-extpass", "echo test",
 		"-config", config, dir)
 	if testing.Verbose() {
 		cmd2.Stdout = os.Stdout
@@ -82,12 +84,12 @@ func TestInitConfig(t *testing.T) {
 
 // Test -init -plaintextnames
 func TestInitPlaintextNames(t *testing.T) {
-	dir := tmpDir + "TestInitPlaintextNames/"
+	dir := test_helpers.TmpDir + "TestInitPlaintextNames/"
 	err := os.Mkdir(dir, 0777)
 	if err != nil {
 		t.Fatal(err)
 	}
-	cmd := exec.Command(gocryptfsBinary, "-init", "-extpass", "echo test",
+	cmd := exec.Command(test_helpers.GocryptfsBinary, "-init", "-extpass", "echo test",
 		"-scryptn=10", "-plaintextnames", dir)
 	if testing.Verbose() {
 		cmd.Stdout = os.Stdout
diff --git a/integration_tests/main_test.go b/tests/integration_tests/main_test.go
index c7607ce..b6cb8ca 100644
--- a/integration_tests/main_test.go
+++ b/tests/integration_tests/main_test.go
@@ -14,6 +14,8 @@ import (
 	"sync"
 	"syscall"
 	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 var plaintextNames bool
@@ -27,10 +29,10 @@ func TestMain(m *testing.M) {
 	if testing.Verbose() {
 		fmt.Println("***** Testing with OpenSSL")
 	}
-	resetTmpDir(false) // <- this also create gocryptfs.diriv
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey")
+	test_helpers.ResetTmpDir(false) // <- this also create gocryptfs.diriv
+	test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey")
 	r := m.Run()
-	unmount(defaultPlainDir)
+	test_helpers.Unmount(test_helpers.DefaultPlainDir)
 
 	if r != 0 {
 		os.Exit(r)
@@ -43,10 +45,10 @@ func TestMain(m *testing.M) {
 	if testing.Verbose() {
 		fmt.Println("***** Testing with native Go crypto")
 	}
-	resetTmpDir(false)
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey", "--openssl=false")
+	test_helpers.ResetTmpDir(false)
+	test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey", "--openssl=false")
 	r = m.Run()
-	unmount(defaultPlainDir)
+	test_helpers.Unmount(test_helpers.DefaultPlainDir)
 
 	if r != 0 {
 		os.Exit(r)
@@ -55,11 +57,11 @@ func TestMain(m *testing.M) {
 	if testing.Verbose() {
 		fmt.Println("***** Testing \"--plaintextnames\"")
 	}
-	resetTmpDir(true) // do not create gocryptfs.diriv
-	mountOrExit(defaultCipherDir, defaultPlainDir, "--zerokey", "--plaintextnames")
+	test_helpers.ResetTmpDir(true) // do not create gocryptfs.diriv
+	test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey", "--plaintextnames")
 	plaintextNames = true
 	r = m.Run()
-	unmount(defaultPlainDir)
+	test_helpers.Unmount(test_helpers.DefaultPlainDir)
 
 	if r != 0 {
 		os.Exit(r)
@@ -70,7 +72,7 @@ func TestMain(m *testing.M) {
 
 // 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)
+	file, err := os.Create(test_helpers.DefaultPlainDir + fn)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -85,12 +87,12 @@ func testWriteN(t *testing.T, fn string, n int) string {
 		t.Error(err)
 	}
 
-	verifySize(t, defaultPlainDir+fn, n)
+	test_helpers.VerifySize(t, test_helpers.DefaultPlainDir+fn, n)
 
 	bin := md5.Sum(d)
 	hashWant := hex.EncodeToString(bin[:])
 
-	hashActual := md5fn(defaultPlainDir + fn)
+	hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + fn)
 
 	if hashActual != hashWant {
 		t.Errorf("Wrong content, hashWant=%s hashActual=%s", hashWant, hashActual)
@@ -116,7 +118,7 @@ func TestWrite1Mx100(t *testing.T) {
 	// Read and check 100 times to catch race conditions
 	var i int
 	for i = 0; i < 100; i++ {
-		hashActual := md5fn(defaultPlainDir + "1M")
+		hashActual := test_helpers.Md5fn(test_helpers.DefaultPlainDir + "1M")
 		if hashActual != hashWant {
 			fmt.Printf("Read corruption in loop # %d\n", i)
 			t.FailNow()
@@ -127,39 +129,39 @@ func TestWrite1Mx100(t *testing.T) {
 }
 
 func TestTruncate(t *testing.T) {
-	fn := defaultPlainDir + "truncate"
+	fn := test_helpers.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" {
+	test_helpers.VerifySize(t, fn, 7000)
+	if test_helpers.Md5fn(fn) != "95d4ec7038e3e4fdbd5f15c34c3f0b34" {
 		t.Errorf("wrong content")
 	}
 	// Shrink - needs RMW
 	file.Truncate(6999)
-	verifySize(t, fn, 6999)
-	if md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" {
+	test_helpers.VerifySize(t, fn, 6999)
+	if test_helpers.Md5fn(fn) != "35fd15873ec6c35380064a41b9b9683b" {
 		t.Errorf("wrong content")
 	}
 	// Shrink to one partial block
 	file.Truncate(465)
-	verifySize(t, fn, 465)
-	if md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" {
+	test_helpers.VerifySize(t, fn, 465)
+	if test_helpers.Md5fn(fn) != "a1534d6e98a6b21386456a8f66c55260" {
 		t.Errorf("wrong content")
 	}
 	// Grow to exactly one block
 	file.Truncate(4096)
-	verifySize(t, fn, 4096)
-	if md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" {
+	test_helpers.VerifySize(t, fn, 4096)
+	if test_helpers.Md5fn(fn) != "620f0b67a91f7f74151bc5be745b7110" {
 		t.Errorf("wrong content")
 	}
 }
 
 func TestAppend(t *testing.T) {
-	fn := defaultPlainDir + "append"
+	fn := test_helpers.DefaultPlainDir + "append"
 	file, err := os.Create(fn)
 	if err != nil {
 		t.FailNow()
@@ -172,7 +174,7 @@ func TestAppend(t *testing.T) {
 		buf.Write(data)
 		bin := md5.Sum(buf.Bytes())
 		hashWant = hex.EncodeToString(bin[:])
-		hashActual := md5fn(fn)
+		hashActual := test_helpers.Md5fn(fn)
 		if hashWant != hashActual {
 			t.FailNow()
 		}
@@ -183,7 +185,7 @@ func TestAppend(t *testing.T) {
 	file.Seek(0, 0)
 	for i := 0; i <= 500; i++ {
 		file.Write(data)
-		hashActual := md5fn(fn)
+		hashActual := test_helpers.Md5fn(fn)
 		if hashWant != hashActual {
 			t.FailNow()
 		}
@@ -193,7 +195,7 @@ func TestAppend(t *testing.T) {
 // 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"
+	fn := test_helpers.DefaultPlainDir + "fileholes"
 	file, err := os.Create(fn)
 	if err != nil {
 		t.Errorf("file create failed")
@@ -221,7 +223,7 @@ func TestRmwRace(t *testing.T) {
 
 	runtime.GOMAXPROCS(10)
 
-	fn := defaultPlainDir + "rmwrace"
+	fn := test_helpers.DefaultPlainDir + "rmwrace"
 	f1, err := os.Create(fn)
 	if err != nil {
 		t.Fatalf("file create failed")
@@ -274,7 +276,7 @@ func TestRmwRace(t *testing.T) {
 		// [oooooossss]
 
 		buf, _ := ioutil.ReadFile(fn)
-		m := md5hex(buf)
+		m := test_helpers.Md5hex(buf)
 		goodMd5[m] = goodMd5[m] + 1
 
 		/*
@@ -292,7 +294,7 @@ func TestRmwRace(t *testing.T) {
 // With "--plaintextnames", the name "/gocryptfs.conf" is reserved.
 // Otherwise there should be no restrictions.
 func TestFiltered(t *testing.T) {
-	filteredFile := defaultPlainDir + "gocryptfs.conf"
+	filteredFile := test_helpers.DefaultPlainDir + "gocryptfs.conf"
 	file, err := os.Create(filteredFile)
 	if plaintextNames == true && err == nil {
 		t.Errorf("should have failed but didn't")
@@ -310,13 +312,13 @@ func TestFiltered(t *testing.T) {
 }
 
 func TestFilenameEncryption(t *testing.T) {
-	file, err := os.Create(defaultPlainDir + "TestFilenameEncryption.txt")
+	file, err := os.Create(test_helpers.DefaultPlainDir + "TestFilenameEncryption.txt")
 	file.Close()
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	_, err = os.Stat(defaultCipherDir + "TestFilenameEncryption.txt")
+	_, err = os.Stat(test_helpers.DefaultCipherDir + "TestFilenameEncryption.txt")
 	if plaintextNames == true && err != nil {
 		t.Errorf("plaintextnames not working: %v", err)
 	} else if plaintextNames == false && err == nil {
@@ -325,19 +327,19 @@ func TestFilenameEncryption(t *testing.T) {
 }
 
 // Test Mkdir and Rmdir
-func TestMkdirRmdir(t *testing.T) {
-	testMkdirRmdir(t, defaultPlainDir)
+func testMkdirRmdir(t *testing.T) {
+	test_helpers.TestMkdirRmdir(t, test_helpers.DefaultPlainDir)
 }
 
 // Test Rename
-func TestRename(t *testing.T) {
-	testRename(t, defaultPlainDir)
+func testRename(t *testing.T) {
+	test_helpers.TestRename(t, test_helpers.DefaultPlainDir)
 }
 
 // Overwrite an empty directory with another directory
 func TestDirOverwrite(t *testing.T) {
-	dir1 := defaultPlainDir + "DirOverwrite1"
-	dir2 := defaultPlainDir + "DirOverwrite2"
+	dir1 := test_helpers.DefaultPlainDir + "DirOverwrite1"
+	dir2 := test_helpers.DefaultPlainDir + "DirOverwrite2"
 	err := os.Mkdir(dir1, 0777)
 	if err != nil {
 		t.Fatal(err)
@@ -353,12 +355,12 @@ func TestDirOverwrite(t *testing.T) {
 }
 
 func TestLongNames(t *testing.T) {
-	fi, err := ioutil.ReadDir(defaultCipherDir)
+	fi, err := ioutil.ReadDir(test_helpers.DefaultCipherDir)
 	if err != nil {
 		t.Fatal(err)
 	}
 	cnt1 := len(fi)
-	wd := defaultPlainDir
+	wd := test_helpers.DefaultPlainDir
 	// Create file with long name
 	n255x := string(bytes.Repeat([]byte("x"), 255))
 	f, err := os.Create(wd + n255x)
@@ -366,7 +368,7 @@ func TestLongNames(t *testing.T) {
 		t.Fatalf("Could not create n255x: %v", err)
 	}
 	f.Close()
-	if !verifyExistence(wd + n255x) {
+	if !test_helpers.VerifyExistence(wd + n255x) {
 		t.Errorf("n255x is not in directory listing")
 	}
 	// Rename long to long
@@ -375,7 +377,7 @@ func TestLongNames(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not rename n255x to n255y: %v", err)
 	}
-	if !verifyExistence(wd + n255y) {
+	if !test_helpers.VerifyExistence(wd + n255y) {
 		t.Errorf("n255y is not in directory listing")
 	}
 	// Rename long to short
@@ -383,7 +385,7 @@ func TestLongNames(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not rename n255y to short: %v", err)
 	}
-	if !verifyExistence(wd + "short") {
+	if !test_helpers.VerifyExistence(wd + "short") {
 		t.Errorf("short is not in directory listing")
 	}
 	// Rename short to long
@@ -391,7 +393,7 @@ func TestLongNames(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not rename short to n255x: %v", err)
 	}
-	if !verifyExistence(wd + n255x) {
+	if !test_helpers.VerifyExistence(wd + n255x) {
 		t.Errorf("255x is not in directory listing II")
 	}
 	// Unlink
@@ -399,7 +401,7 @@ func TestLongNames(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Could not unlink n255x: %v", err)
 	}
-	if verifyExistence(wd + n255x) {
+	if test_helpers.VerifyExistence(wd + n255x) {
 		t.Errorf("n255x still there after unlink")
 	}
 	// Long symlink
@@ -408,7 +410,7 @@ func TestLongNames(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if !verifyExistence(wd + n255s) {
+	if !test_helpers.VerifyExistence(wd + n255s) {
 		t.Errorf("n255s is not in directory listing")
 	}
 	err = syscall.Unlink(wd + n255s)
@@ -426,7 +428,7 @@ func TestLongNames(t *testing.T) {
 		t.Error(err)
 	}
 	// Check for orphaned files
-	fi, err = ioutil.ReadDir(defaultCipherDir)
+	fi, err = ioutil.ReadDir(test_helpers.DefaultCipherDir)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/integration_tests/performance_test.go b/tests/integration_tests/performance_test.go
index 9a0399a..67f0b28 100644
--- a/integration_tests/performance_test.go
+++ b/tests/integration_tests/performance_test.go
@@ -8,13 +8,15 @@ import (
 	"io/ioutil"
 	"os"
 	"testing"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 func BenchmarkStreamWrite(t *testing.B) {
 	buf := make([]byte, 1024*1024)
 	t.SetBytes(int64(len(buf)))
 
-	file, err := os.Create(defaultPlainDir + "BenchmarkWrite")
+	file, err := os.Create(test_helpers.DefaultPlainDir + "BenchmarkWrite")
 	if err != nil {
 		t.FailNow()
 	}
@@ -35,7 +37,7 @@ func BenchmarkStreamRead(t *testing.B) {
 	buf := make([]byte, 1024*1024)
 	t.SetBytes(int64(len(buf)))
 
-	fn := defaultPlainDir + "BenchmarkWrite"
+	fn := test_helpers.DefaultPlainDir + "BenchmarkWrite"
 	fi, err := os.Stat(fn)
 	if err != nil {
 		t.Fatal(err)
@@ -82,7 +84,7 @@ func BenchmarkStreamRead(t *testing.B) {
 
 // createFiles - create "count" files of size "size" bytes each
 func createFiles(t *testing.B, count int, size int) {
-	dir := fmt.Sprintf("%s/createFiles_%d_%d", defaultPlainDir, count, size)
+	dir := fmt.Sprintf("%s/createFiles_%d_%d", test_helpers.DefaultPlainDir, count, size)
 	err := os.Mkdir(dir, 0777)
 	if err != nil {
 		t.Fatal(err)
diff --git a/stress_tests/extractloop.bash b/tests/stress_tests/extractloop.bash
index c488707..c488707 100755
--- a/stress_tests/extractloop.bash
+++ b/tests/stress_tests/extractloop.bash
diff --git a/stress_tests/extractloop.md5sums b/tests/stress_tests/extractloop.md5sums
index 2cf6349..2cf6349 100644
--- a/stress_tests/extractloop.md5sums
+++ b/tests/stress_tests/extractloop.md5sums
diff --git a/stress_tests/fsstress-gocryptfs.bash b/tests/stress_tests/fsstress-gocryptfs.bash
index 44ba569..44ba569 120000
--- a/stress_tests/fsstress-gocryptfs.bash
+++ b/tests/stress_tests/fsstress-gocryptfs.bash
diff --git a/stress_tests/fsstress-loopback.bash b/tests/stress_tests/fsstress-loopback.bash
index 51c68db..51c68db 100755
--- a/stress_tests/fsstress-loopback.bash
+++ b/tests/stress_tests/fsstress-loopback.bash
diff --git a/integration_tests/helpers.go b/tests/test_helpers/helpers.go
index 4881a4b..2f3bf0c 100644
--- a/integration_tests/helpers.go
+++ b/tests/test_helpers/helpers.go
@@ -1,4 +1,4 @@
-package integration_tests
+package test_helpers
 
 import (
 	"crypto/md5"
@@ -15,43 +15,43 @@ import (
 )
 
 // Note: the code assumes that all have a trailing slash
-const tmpDir = "/tmp/gocryptfs_main_test/"
-const defaultPlainDir = tmpDir + "plain/"
-const defaultCipherDir = tmpDir + "cipher/"
+const TmpDir = "/tmp/gocryptfs_main_test/"
+const DefaultPlainDir = TmpDir + "plain/"
+const DefaultCipherDir = TmpDir + "cipher/"
 
-const gocryptfsBinary = "../gocryptfs"
+const GocryptfsBinary = "../../gocryptfs"
 
-// resetTmpDir - delete old tmp dir, create new one, write gocryptfs.diriv
-func resetTmpDir(plaintextNames bool) {
+// ResetTmpDir - delete old tmp dir, create new one, write gocryptfs.diriv
+func ResetTmpDir(plaintextNames bool) {
 
 	// Try to unmount everything
-	entries, err := ioutil.ReadDir(tmpDir)
+	entries, err := ioutil.ReadDir(TmpDir)
 	if err == nil {
 		for _, e := range entries {
-			fu := exec.Command("fusermount", "-z", "-u", filepath.Join(tmpDir, e.Name()))
+			fu := exec.Command("fusermount", "-z", "-u", filepath.Join(TmpDir, e.Name()))
 			fu.Run()
 		}
 	}
 
-	err = os.RemoveAll(tmpDir)
+	err = os.RemoveAll(TmpDir)
 	if err != nil {
 		fmt.Println("resetTmpDir: RemoveAll:" + err.Error())
 		os.Exit(1)
 	}
 
-	err = os.MkdirAll(defaultPlainDir, 0777)
+	err = os.MkdirAll(DefaultPlainDir, 0777)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 
-	err = os.MkdirAll(defaultCipherDir, 0777)
+	err = os.MkdirAll(DefaultCipherDir, 0777)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 	if !plaintextNames {
-		err = nametransform.WriteDirIV(defaultCipherDir)
+		err = nametransform.WriteDirIV(DefaultCipherDir)
 		if err != nil {
 			fmt.Println(err)
 			os.Exit(1)
@@ -59,8 +59,8 @@ func resetTmpDir(plaintextNames bool) {
 	}
 }
 
-// mount CIPHERDIR "c" on PLAINDIR "p"
-func mount(c string, p string, extraArgs ...string) error {
+// Mount CIPHERDIR "c" on PLAINDIR "p"
+func Mount(c string, p string, extraArgs ...string) error {
 	var args []string
 	args = append(args, extraArgs...)
 	args = append(args, "-nosyslog", "-q", "-wpanic")
@@ -68,31 +68,33 @@ func mount(c string, p string, extraArgs ...string) error {
 	//args = append(args, "-d")
 	args = append(args, c)
 	args = append(args, p)
-	cmd := exec.Command(gocryptfsBinary, args...)
+	cmd := exec.Command(GocryptfsBinary, args...)
 	cmd.Stderr = os.Stderr
-	cmd.Stdout = os.Stdout
+	if testing.Verbose() {
+		cmd.Stdout = os.Stdout
+	}
 	return cmd.Run()
 }
 
-// mountOrExit calls mount() and exits on failure.
-func mountOrExit(c string, p string, extraArgs ...string) {
-	err := mount(c, p, extraArgs...)
+// MountOrExit calls mount() and exits on failure.
+func MountOrExit(c string, p string, extraArgs ...string) {
+	err := Mount(c, p, extraArgs...)
 	if err != nil {
 		fmt.Printf("mount failed: %v", err)
 		os.Exit(1)
 	}
 }
 
-// mountOrFatal calls mount() and calls t.Fatal() on failure.
-func mountOrFatal(t *testing.T, c string, p string, extraArgs ...string) {
-	err := mount(c, p, extraArgs...)
+// MountOrFatal calls mount() and calls t.Fatal() on failure.
+func MountOrFatal(t *testing.T, c string, p string, extraArgs ...string) {
+	err := Mount(c, p, extraArgs...)
 	if err != nil {
 		t.Fatal(fmt.Errorf("mount failed: %v", err))
 	}
 }
 
-// unmount PLAINDIR "p"
-func unmount(p string) error {
+// Unmount PLAINDIR "p"
+func Unmount(p string) error {
 	fu := exec.Command("fusermount", "-u", "-z", p)
 	fu.Stdout = os.Stdout
 	fu.Stderr = os.Stderr
@@ -104,17 +106,17 @@ func unmount(p string) error {
 }
 
 // Return md5 string for file "filename"
-func md5fn(filename string) string {
+func Md5fn(filename string) string {
 	buf, err := ioutil.ReadFile(filename)
 	if err != nil {
 		fmt.Printf("ReadFile: %v\n", err)
 		return ""
 	}
-	return md5hex(buf)
+	return Md5hex(buf)
 }
 
 // Return md5 string for "buf"
-func md5hex(buf []byte) string {
+func Md5hex(buf []byte) string {
 	rawHash := md5.Sum(buf)
 	hash := hex.EncodeToString(rawHash[:])
 	return hash
@@ -123,7 +125,7 @@ func md5hex(buf []byte) string {
 // Verify that the file size equals "want". This checks:
 // 1) Size reported by Stat()
 // 2) Number of bytes returned when reading the whole file
-func verifySize(t *testing.T, path string, want int) {
+func VerifySize(t *testing.T, path string, want int) {
 	buf, err := ioutil.ReadFile(path)
 	if err != nil {
 		t.Errorf("ReadFile failed: %v", err)
@@ -140,7 +142,7 @@ func verifySize(t *testing.T, path string, want int) {
 }
 
 // Create and delete a directory
-func testMkdirRmdir(t *testing.T, plainDir string) {
+func TestMkdirRmdir(t *testing.T, plainDir string) {
 	dir := plainDir + "dir1"
 	err := os.Mkdir(dir, 0777)
 	if err != nil {
@@ -187,7 +189,7 @@ func testMkdirRmdir(t *testing.T, plainDir string) {
 }
 
 // Create and rename a file
-func testRename(t *testing.T, plainDir string) {
+func TestRename(t *testing.T, plainDir string) {
 	file1 := plainDir + "rename1"
 	file2 := plainDir + "rename2"
 	err := ioutil.WriteFile(file1, []byte("content"), 0777)
@@ -203,7 +205,7 @@ func testRename(t *testing.T, plainDir string) {
 
 // verifyExistence - check in 3 ways that "path" exists:
 // stat, open, readdir
-func verifyExistence(path string) bool {
+func VerifyExistence(path string) bool {
 
 	// Check that file can be stated
 	_, err := os.Stat(path)