tests: add TestLongnamemax100Reverse

Fails right now as reported in https://github.com/rfjakob/gocryptfs/pull/655

--- FAIL: TestLongnamemax100Reverse (0.09s)
    longnamemax_test.go:104: l=64: should see a longname now
    longnamemax_test.go:104: l=65: should see a longname now
    longnamemax_test.go:104: l=66: should see a longname now
    longnamemax_test.go:104: l=67: should see a longname now
    longnamemax_test.go:104: l=68: should see a longname now
    longnamemax_test.go:104: l=69: should see a longname now
    longnamemax_test.go:104: l=70: should see a longname now
    longnamemax_test.go:104: l=71: should see a longname now
    longnamemax_test.go:104: l=72: should see a longname now
    longnamemax_test.go:104: l=73: should see a longname now
    longnamemax_test.go:104: l=74: should see a longname now
    longnamemax_test.go:104: l=75: should see a longname now
    longnamemax_test.go:104: l=76: should see a longname now
    longnamemax_test.go:104: l=77: should see a longname now
    longnamemax_test.go:104: l=78: should see a longname now
    longnamemax_test.go:104: l=79: should see a longname now
    longnamemax_test.go:104: l=80: should see a longname now
    longnamemax_test.go:104: l=81: should see a longname now
    longnamemax_test.go:104: l=82: should see a longname now
    longnamemax_test.go:104: l=83: should see a longname now
    longnamemax_test.go:104: l=84: should see a longname now
    longnamemax_test.go:104: l=85: should see a longname now
    longnamemax_test.go:104: l=86: should see a longname now
    longnamemax_test.go:104: l=87: should see a longname now
    longnamemax_test.go:104: l=88: should see a longname now
    longnamemax_test.go:104: l=89: should see a longname now
    longnamemax_test.go:104: l=90: should see a longname now
    longnamemax_test.go:104: l=91: should see a longname now
    longnamemax_test.go:104: l=92: should see a longname now
    longnamemax_test.go:104: l=93: should see a longname now
    longnamemax_test.go:104: l=94: should see a longname now
    longnamemax_test.go:104: l=95: should see a longname now
    longnamemax_test.go:104: l=96: should see a longname now
    longnamemax_test.go:104: l=97: should see a longname now
    longnamemax_test.go:104: l=98: should see a longname now
    longnamemax_test.go:104: l=99: should see a longname now
    longnamemax_test.go:104: l=100: should see a longname now
    longnamemax_test.go:104: l=101: should see a longname now
    longnamemax_test.go:104: l=102: should see a longname now
    longnamemax_test.go:104: l=103: should see a longname now
    longnamemax_test.go:104: l=104: should see a longname now
    longnamemax_test.go:104: l=105: should see a longname now
    longnamemax_test.go:104: l=106: should see a longname now
    longnamemax_test.go:104: l=107: should see a longname now
    longnamemax_test.go:104: l=108: should see a longname now
    longnamemax_test.go:104: l=109: should see a longname now
    longnamemax_test.go:104: l=110: should see a longname now
    longnamemax_test.go:104: l=111: should see a longname now
    longnamemax_test.go:104: l=112: should see a longname now
    longnamemax_test.go:104: l=113: should see a longname now
    longnamemax_test.go:104: l=114: should see a longname now
    longnamemax_test.go:104: l=115: should see a longname now
    longnamemax_test.go:104: l=116: should see a longname now
    longnamemax_test.go:104: l=117: should see a longname now
    longnamemax_test.go:104: l=118: should see a longname now
    longnamemax_test.go:104: l=119: should see a longname now
    longnamemax_test.go:104: l=120: should see a longname now
    longnamemax_test.go:104: l=121: should see a longname now
    longnamemax_test.go:104: l=122: should see a longname now
    longnamemax_test.go:104: l=123: should see a longname now
    longnamemax_test.go:104: l=124: should see a longname now
    longnamemax_test.go:104: l=125: should see a longname now
    longnamemax_test.go:104: l=126: should see a longname now
    longnamemax_test.go:104: l=127: should see a longname now
    longnamemax_test.go:104: l=128: should see a longname now
    longnamemax_test.go:104: l=129: should see a longname now
    longnamemax_test.go:104: l=130: should see a longname now
    longnamemax_test.go:104: l=131: should see a longname now
    longnamemax_test.go:104: l=132: should see a longname now
    longnamemax_test.go:104: l=133: should see a longname now
    longnamemax_test.go:104: l=134: should see a longname now
    longnamemax_test.go:104: l=135: should see a longname now
    longnamemax_test.go:104: l=136: should see a longname now
    longnamemax_test.go:104: l=137: should see a longname now
    longnamemax_test.go:104: l=138: should see a longname now
    longnamemax_test.go:104: l=139: should see a longname now
    longnamemax_test.go:104: l=140: should see a longname now
    longnamemax_test.go:104: l=141: should see a longname now
    longnamemax_test.go:104: l=142: should see a longname now
    longnamemax_test.go:104: l=143: should see a longname now
    longnamemax_test.go:104: l=144: should see a longname now
    longnamemax_test.go:104: l=145: should see a longname now
    longnamemax_test.go:104: l=146: should see a longname now
    longnamemax_test.go:104: l=147: should see a longname now
    longnamemax_test.go:104: l=148: should see a longname now
    longnamemax_test.go:104: l=149: should see a longname now
    longnamemax_test.go:104: l=150: should see a longname now
    longnamemax_test.go:104: l=151: should see a longname now
    longnamemax_test.go:104: l=152: should see a longname now
    longnamemax_test.go:104: l=153: should see a longname now
    longnamemax_test.go:104: l=154: should see a longname now
    longnamemax_test.go:104: l=155: should see a longname now
    longnamemax_test.go:104: l=156: should see a longname now
    longnamemax_test.go:104: l=157: should see a longname now
    longnamemax_test.go:104: l=158: should see a longname now
    longnamemax_test.go:104: l=159: should see a longname now
    longnamemax_test.go:104: l=160: should see a longname now
    longnamemax_test.go:104: l=161: should see a longname now
    longnamemax_test.go:104: l=162: should see a longname now
    longnamemax_test.go:104: l=163: should see a longname now
    longnamemax_test.go:104: l=164: should see a longname now
    longnamemax_test.go:104: l=165: should see a longname now
    longnamemax_test.go:104: l=166: should see a longname now
    longnamemax_test.go:104: l=167: should see a longname now
    longnamemax_test.go:104: l=168: should see a longname now
    longnamemax_test.go:104: l=169: should see a longname now
    longnamemax_test.go:104: l=170: should see a longname now
    longnamemax_test.go:104: l=171: should see a longname now
    longnamemax_test.go:104: l=172: should see a longname now
    longnamemax_test.go:104: l=173: should see a longname now
    longnamemax_test.go:104: l=174: should see a longname now
    longnamemax_test.go:104: l=175: should see a longname now
FAIL

https://github.com/rfjakob/gocryptfs/pull/655

1 files changed, 47 insertions, 1 deletions

diff --git a/tests/cli/longnamemax_test.go b/tests/cli/longnamemax_test.go
index fc429f6..e44a84e 100644
--- a/tests/cli/longnamemax_test.go
+++ b/tests/cli/longnamemax_test.go
@@ -16,7 +16,7 @@ import (
 
 // Create & test fs with -longnamemax=100
 func TestLongnamemax100(t *testing.T) {
-	cDir := test_helpers.InitFS(nil, "-longnamemax", "100")
+	cDir := test_helpers.InitFS(t, "-longnamemax", "100")
 	pDir := cDir + ".mnt"
 
 	// Check config file sanity
@@ -59,3 +59,49 @@ func TestLongnamemax100(t *testing.T) {
 		}
 	}
 }
+
+// Create & test fs with -reverse -longnamemax=100
+func TestLongnamemax100Reverse(t *testing.T) {
+	backingDir := test_helpers.InitFS(t, "-reverse", "-longnamemax", "100")
+	mntDir := backingDir + ".mnt"
+
+	// Check config file sanity
+	_, c, err := configfile.LoadAndDecrypt(backingDir+"/"+configfile.ConfReverseName, testPw)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	if !c.IsFeatureFlagSet(configfile.FlagLongNameMax) {
+		t.Error("FlagLongNameMax should be on")
+	}
+	if c.LongNameMax != 100 {
+		t.Errorf("LongNameMax=%d, want 100", c.LongNameMax)
+	}
+
+	// Check that it takes effect
+	test_helpers.MountOrExit(backingDir, mntDir, "-reverse", "-extpass", "echo test")
+	defer test_helpers.UnmountPanic(mntDir)
+
+	for l := 1; l <= 255; l++ {
+		path := backingDir + "/" + strings.Repeat("x", l)
+		if err := ioutil.WriteFile(path, nil, 0600); err != nil {
+			t.Fatal(err)
+		}
+		matches, err := filepath.Glob(mntDir + "/gocryptfs.longname.*")
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = syscall.Unlink(path)
+		if err != nil {
+			t.Fatal(err)
+		}
+		// As determined experimentally, a name of length >= 64 causes a longname
+		// to be created.
+		if l <= 63 && len(matches) != 0 {
+			t.Errorf("l=%d: should not see a longname yet", l)
+		}
+		if l >= 64 && len(matches) != 2 {
+			t.Errorf("l=%d: should see a longname now", l)
+		}
+	}
+}