From 8215f02fecb4aadfb2f40f795d019d9c51c65bf3 Mon Sep 17 00:00:00 2001
From: Nuno Cruces <ncruces@users.noreply.github.com>
Date: Wed, 7 Jun 2023 14:22:07 +0100
Subject: [PATCH] Fix #63.

---
 file.go             |  4 ++--
 file_filter_test.go | 26 +++++++++++++-------------
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/file.go b/file.go
index 869b49c..3b74fa4 100644
--- a/file.go
+++ b/file.go
@@ -182,8 +182,8 @@ func (f FileFilters) types() []string {
 	if res == nil {
 		return nil
 	}
-	// Workaround for macOS bug: first type cannot be a four letter extension, so prepend empty string.
-	return append([]string{""}, res...)
+	// Workaround for macOS bug: first type cannot be a four letter extension, so prepend dot string.
+	return append([]string{"."}, res...)
 }
 
 // Unix patterns are case-sensitive. Fold them if requested.
diff --git a/file_filter_test.go b/file_filter_test.go
index fc5ed4c..102fe75 100644
--- a/file_filter_test.go
+++ b/file_filter_test.go
@@ -91,21 +91,21 @@ func TestFileFilters_types(t *testing.T) {
 		want []string
 	}{
 		{[]string{``}, nil},
-		{[]string{`*.png`}, []string{"", "png"}},
+		{[]string{`*.png`}, []string{".", "png"}},
 		{[]string{`*.pn?`}, nil},
-		{[]string{`*.pn;`}, []string{"", "pn;"}},
-		{[]string{`*.pn\?`}, []string{"", "pn?"}},
+		{[]string{`*.pn;`}, []string{".", "pn;"}},
+		{[]string{`*.pn\?`}, []string{".", "pn?"}},
 		{[]string{`*.[PpNnGg]`}, nil},
-		{[]string{`*.[Pp][Nn][Gg]`}, []string{"", "PNG"}},
-		{[]string{`*.[Pp][\Nn][G\g]`}, []string{"", "PNG"}},
-		{[]string{`*.[PNG`}, []string{"", "[PNG"}},
-		{[]string{`*.]PNG`}, []string{"", "]PNG"}},
-		{[]string{`*.[[]PNG`}, []string{"", "[PNG"}},
-		{[]string{`*.[]]PNG`}, []string{"", "]PNG"}},
-		{[]string{`*.[\[]PNG`}, []string{"", "[PNG"}},
-		{[]string{`*.[\]]PNG`}, []string{"", "]PNG"}},
-		{[]string{`public.png`}, []string{"", "public.png"}},
-		{[]string{`-public-.png`}, []string{"", "png"}},
+		{[]string{`*.[Pp][Nn][Gg]`}, []string{".", "PNG"}},
+		{[]string{`*.[Pp][\Nn][G\g]`}, []string{".", "PNG"}},
+		{[]string{`*.[PNG`}, []string{".", "[PNG"}},
+		{[]string{`*.]PNG`}, []string{".", "]PNG"}},
+		{[]string{`*.[[]PNG`}, []string{".", "[PNG"}},
+		{[]string{`*.[]]PNG`}, []string{".", "]PNG"}},
+		{[]string{`*.[\[]PNG`}, []string{".", "[PNG"}},
+		{[]string{`*.[\]]PNG`}, []string{".", "]PNG"}},
+		{[]string{`public.png`}, []string{".", "public.png"}},
+		{[]string{`-public-.png`}, []string{".", "png"}},
 	}
 	for i, tt := range tests {
 		filters := FileFilters{FileFilter{Patterns: tt.data}}