tests: add v0.7-plaintextnames example filesystem

The v0.6-plaintextnames example FS lacks the GCMIV128 feature
flag, is no longer mountable and can no longer be used for testing.

Add a new "-plaintextnames" filesystem created by gocryptfs v0.7.
There have been no format changes to "-plaintextnames" since then.

tests/example_filesystems/example_filesystems_test.go

@@ -194,6 +194,26 @@ func TestExampleFSv07(t *testing.T) {
 	}
 }
 
+// gocryptfs v0.7 filesystem created with "-plaintextnames"
+func TestExampleFSv07PlaintextNames(t *testing.T) {
+	cDir := "v0.7-plaintextnames"
+	pDir := test_helpers.TmpDir + cDir + ".mnt"
+
+	test_helpers.MountOrFatal(t, cDir, pDir, "-extpass", "echo test")
+	checkExampleFS(t, pDir, true)
+	test_helpers.Unmount(pDir)
+
+	test_helpers.MountOrFatal(t, cDir, pDir, "-plaintextnames", "-masterkey",
+		"6d96397b-585631e1-c7cba69d-61e738b6-4d5ad2c2-e21f0fb3-52f60d3a-b08526f7")
+	checkExampleFS(t, pDir, true)
+	test_helpers.Unmount(pDir)
+
+	err := os.Remove(pDir)
+	if err != nil {
+		t.Error(err)
+	}
+}
+
 // Test example_filesystems/v0.9
 // (gocryptfs v0.9 introduced long file name support)
 func TestExampleFSv09(t *testing.T) {

tests/example_filesystems/v0.7-plaintextnames/abs

@@ -0,0 +1 @@
+/a/b/c/d

tests/example_filesystems/v0.7-plaintextnames/gocryptfs.conf

@@ -0,0 +1,15 @@
+{
+	"EncryptedKey": "13f9NLdlS20w26T0bukhVrqhumJOHhRyntEJb2y2BJK+K1kulklQGT6gxSWPsjDqw5514h9/euMiKMwc",
+	"ScryptObject": {
+		"Salt": "b2ZD+7sN6b/lchJbYT+4K73tscC6WwbGrdxHuFjhOT4=",
+		"N": 1024,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 2,
+	"FeatureFlags": [
+		"GCMIV128",
+		"PlaintextNames"
+	]
+}

tests/example_filesystems/v0.7-plaintextnames/rel

@@ -0,0 +1 @@
+status.txt