tests: use unmount wrapper in ResetTmpDir

This should make it work on OSX.

Also, split unmount into two functions. Depending on what you
want,

* UnmountErr returns the resulting error
* UnmountPanic panics if the error was not nil

tests/example_filesystems/example_filesystems_test.go

@@ -7,6 +7,8 @@ package example_filesystems
 // "-openssl=true".
 
 import (
+	"flag"
+	"fmt"
 	"os"
 	"testing"
 
@@ -18,7 +20,12 @@ const statusTxtContent = "It works!\n"
 var opensslOpt string
 
 func TestMain(m *testing.M) {
+	// Make "testing.Verbose()" return the correct value
+	flag.Parse()
 	for _, opensslOpt = range []string{"-openssl=false", "-openssl=true"} {
+		if testing.Verbose() {
+			fmt.Printf("TestMain: testing with %q\n", opensslOpt)
+		}
 		test_helpers.ResetTmpDir(true)
 		r := m.Run()
 		if r != 0 {
@@ -80,12 +87,12 @@ func TestExampleFSv07(t *testing.T) {
 	}
 	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test", opensslOpt)
 	checkExampleFS(t, pDir, true)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey",
 		"ed7f6d83-40cce86c-0e7d79c2-a9438710-575221bf-30a0eb60-2821fa8f-7f3123bf",
 		opensslOpt)
 	checkExampleFS(t, pDir, true)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 }
 
 // gocryptfs v0.7 filesystem created with "-plaintextnames"
@@ -95,7 +102,7 @@ func TestExampleFSv07PlaintextNames(t *testing.T) {
 
 	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test", opensslOpt)
 	checkExampleFS(t, pDir, true)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 	// The actual unmount takes some time, this causes weird problems. Just don't
 	// reuse the mountpoint.
 	pDir = pDir + ".2"
@@ -103,7 +110,7 @@ func TestExampleFSv07PlaintextNames(t *testing.T) {
 		"6d96397b-585631e1-c7cba69d-61e738b6-4d5ad2c2-e21f0fb3-52f60d3a-b08526f7",
 		opensslOpt)
 	checkExampleFS(t, pDir, true)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 }
 
 // Test example_filesystems/v0.9
@@ -117,11 +124,11 @@ func TestExampleFSv09(t *testing.T) {
 	}
 	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test", opensslOpt)
 	checkExampleFSLongnames(t, pDir)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 	pDir = pDir + ".2"
 	test_helpers.MountOrFatal(t, cDir, pDir, "-masterkey",
 		"1cafe3f4-bc316466-2214c47c-ecd89bf3-4e078fe4-f5faeea7-8b7cab02-884f5e1c",
 		opensslOpt)
 	checkExampleFSLongnames(t, pDir)
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 }

tests/matrix/matrix_test.go

@@ -45,7 +45,7 @@ func TestMain(m *testing.M) {
 			opts = append(opts, fmt.Sprintf("-plaintextnames=%v", plaintextnames))
 			test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, opts...)
 			r := m.Run()
-			test_helpers.Unmount(test_helpers.DefaultPlainDir)
+			test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
 			if r != 0 {
 				os.Exit(r)
 			}

tests/normal/cli_test.go

@@ -17,7 +17,7 @@ func TestMain(m *testing.M) {
 	test_helpers.ResetTmpDir(false)
 	test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "--zerokey")
 	r := m.Run()
-	test_helpers.Unmount(test_helpers.DefaultPlainDir)
+	test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
 	os.Exit(r)
 }
 
@@ -91,7 +91,7 @@ func TestRo(t *testing.T) {
 	dir := test_helpers.InitFS(t)
 	mnt := dir + ".mnt"
 	test_helpers.MountOrFatal(t, dir, mnt, "-ro", "-extpass=echo test")
-	defer test_helpers.Unmount(mnt)
+	defer test_helpers.UnmountPanic(mnt)
 
 	file := mnt + "/file"
 	err := os.Mkdir(file, 0777)

tests/plaintextnames/plaintextnames_test.go

@@ -21,7 +21,7 @@ func TestMain(m *testing.M) {
 	pDir = cDir + ".mnt"
 	test_helpers.MountOrExit(cDir, pDir, "-extpass", "echo test")
 	r := m.Run()
-	test_helpers.Unmount(pDir)
+	test_helpers.UnmountPanic(pDir)
 	os.Exit(r)
 }
 

tests/test_helpers/helpers.go

@@ -11,7 +11,6 @@ import (
 	"runtime"
 	"syscall"
 	"testing"
-	"time"
 
 	"github.com/rfjakob/gocryptfs/internal/nametransform"
 )
@@ -50,9 +49,11 @@ func ResetTmpDir(plaintextNames bool) {
 			d := filepath.Join(TmpDir, e.Name())
 			err = os.Remove(d)
 			if err != nil {
-				fu := exec.Command("fusermount", "-z", "-u", d)
-				fu.Run()
-				os.RemoveAll(d)
+				UnmountErr(d)
+				err = os.RemoveAll(d)
+				if err != nil {
+					panic(err)
+				}
 			}
 		}
 	}
@@ -141,23 +142,26 @@ func MountOrFatal(t *testing.T, c string, p string, extraArgs ...string) {
 	}
 }
 
-// Unmount PLAINDIR "p"
-func Unmount(p string) error {
-	var cmd *exec.Cmd
-	if runtime.GOOS == "darwin" {
-		cmd = exec.Command("umount", p)
-	} else {
-		cmd = exec.Command("fusermount", "-u", "-z", p)
-	}
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	err := cmd.Run()
+// UnmountPanic tries to umount "dir" and panics on error.
+func UnmountPanic(dir string) {
+	err := UnmountErr(dir)
 	if err != nil {
 		fmt.Println(err)
 		panic(err)
 	}
-	time.Sleep(10 * time.Millisecond)
-	return err
+}
+
+// UnmountError tries to unmount "dir" and returns the resulting error.
+func UnmountErr(dir string) error {
+	var cmd *exec.Cmd
+	if runtime.GOOS == "darwin" {
+		cmd = exec.Command("umount", dir)
+	} else {
+		cmd = exec.Command("fusermount", "-u", "-z", dir)
+	}
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
 }
 
 // Return md5 string for file "filename"