From e1ee394c262bd5cdcdbff7565300cd88a26c5266 Mon Sep 17 00:00:00 2001
From: Jakob Borg <jakob@nym.se>
Date: Sat, 7 Mar 2015 14:35:29 +0100
Subject: [PATCH] Add test for osutil.InWritableDir

---
 internal/osutil/osutil_test.go | 63 +++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

diff --git a/internal/osutil/osutil_test.go b/internal/osutil/osutil_test.go
index 74abd1f8d..40fcae469 100644
--- a/internal/osutil/osutil_test.go
+++ b/internal/osutil/osutil_test.go
@@ -15,4 +15,65 @@
 
 package osutil_test
 
-// Empty test file to generate 0% coverage rather than no coverage
+import (
+	"os"
+	"testing"
+
+	"github.com/syncthing/syncthing/internal/osutil"
+)
+
+func TestInWriteableDir(t *testing.T) {
+	err := os.RemoveAll("testdata")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll("testdata")
+
+	os.Mkdir("testdata", 0700)
+	os.Mkdir("testdata/rw", 0700)
+	os.Mkdir("testdata/ro", 0500)
+
+	create := func(name string) error {
+		fd, err := os.Create(name)
+		if err != nil {
+			return err
+		}
+		fd.Close()
+		return nil
+	}
+
+	// These should succeed
+
+	err = osutil.InWritableDir(create, "testdata/file")
+	if err != nil {
+		t.Error("testdata/file:", err)
+	}
+	err = osutil.InWritableDir(create, "testdata/rw/foo")
+	if err != nil {
+		t.Error("testdata/rw/foo:", err)
+	}
+	err = osutil.InWritableDir(os.Remove, "testdata/rw/foo")
+	if err != nil {
+		t.Error("testdata/rw/foo:", err)
+	}
+
+	err = osutil.InWritableDir(create, "testdata/ro/foo")
+	if err != nil {
+		t.Error("testdata/ro/foo:", err)
+	}
+	err = osutil.InWritableDir(os.Remove, "testdata/ro/foo")
+	if err != nil {
+		t.Error("testdata/ro/foo:", err)
+	}
+
+	// These should not
+
+	err = osutil.InWritableDir(create, "testdata/nonexistent/foo")
+	if err == nil {
+		t.Error("testdata/nonexistent/foo returned nil error")
+	}
+	err = osutil.InWritableDir(create, "testdata/file/foo")
+	if err == nil {
+		t.Error("testdata/file/foo returned nil error")
+	}
+}