tests: add v0.5 example filesystem (with DirIV!)

integration_tests/example_filesystems/v0.5/By5HbeLik3V5zkv7Ls1pbg==

@@ -0,0 +1 @@
+l7TSsTckQSyPjfmEJGNd8dRrbJCA68YIqD_ZYpKu4UQxlM-8RqA=

integration_tests/example_filesystems/v0.5/gNdxbufjfWaFvNeyEZ-mUg==

@@ -0,0 +1 @@
+fgxzwbsvjcQzLLJCh8iXmdL89StySXpiXyLSyGLWuDmDxNVH

integration_tests/example_filesystems/v0.5/gocryptfs.conf

@@ -0,0 +1,14 @@
+{
+	"EncryptedKey": "eEjly8AC1f/7HSiBwZlCWtzYXx+le7HpKu2qf8mcNo6ua2J0N4wasewjkzntU6r2ROdp3hjFQyHtZrCf",
+	"ScryptObject": {
+		"Salt": "MHr2o3kUQAHPE7Wc+p4eDDhKrpA8AOwzOo14JYoU89s=",
+		"N": 65536,
+		"R": 8,
+		"P": 1,
+		"KeyLen": 32
+	},
+	"Version": 2,
+	"FeatureFlags": [
+		"DirIV"
+	]
+}

integration_tests/example_filesystems/v0.5/gocryptfs.diriv

@@ -0,0 +1 @@
+«¯úDÈ|å¯?jq

integration_tests/example_filesystems_test.go

@@ -44,11 +44,11 @@ func checkExampleContent(t *testing.T, dir string) {
 	}
 }
 
-// Test example_filesystems/normal
+// Test example_filesystems/v0.4
 // with password mount and -masterkey mount
-func TestExampleFsNormal(t *testing.T) {
-	pDir := tmpDir + "TestExampleFsNormal/"
-	cDir := "example_filesystems/normal"
+func TestExampleFsV04(t *testing.T) {
+	pDir := tmpDir + "TestExampleFsV04/"
+	cDir := "example_filesystems/v0.4"
 	err := os.Mkdir(pDir, 0777)
 	if err != nil {
 		t.Fatal(err)
@@ -65,3 +65,25 @@ func TestExampleFsNormal(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+// Test example_filesystems/v0.5
+// with password mount and -masterkey mount
+func TestExampleFsV05(t *testing.T) {
+	pDir := tmpDir + "TestExampleFsV05/"
+	cDir := "example_filesystems/v0.5"
+	err := os.Mkdir(pDir, 0777)
+	if err != nil {
+		t.Fatal(err)
+	}
+	mount(cDir, pDir, "-extpass", "echo test")
+	checkExampleContent(t, pDir)
+	unmount(pDir)
+	mount(cDir, pDir, "-masterkey", "e7f38c71-0da80f68-d3b2cd7d-ee4f49e5-"+
+		"f8bc98cd-d7976950-85204c54-3081b302")
+	checkExampleContent(t, pDir)
+	unmount(pDir)
+	err = os.Remove(pDir)
+	if err != nil {
+		t.Error(err)
+	}
+}