ParseHeader: print hexdump on error

Should help debugging https://github.com/rfjakob/gocryptfs/issues/363

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/matrix/matrix_test.go b/tests/matrix/matrix_test.go
index 33d2ab2..65dd691 100644
--- a/tests/matrix/matrix_test.go
+++ b/tests/matrix/matrix_test.go
@@ -98,13 +98,13 @@ func testWriteN(t *testing.T, fn string, n int) string {
 	}
 
 	d := make([]byte, n)
-	written, err := file.Write(d)
-	if err != nil || written != len(d) {
-		t.Errorf("err=\"%s\", written=%d", err, written)
+	_, err := file.Write(d)
+	if err != nil {
+		t.Fatal(err)
 	}
 	err = file.Close()
 	if err != nil {
-		t.Error(err)
+		t.Fatal(err)
 	}
 
 	test_helpers.VerifySize(t, test_helpers.DefaultPlainDir+"/"+fn, n)