Set `pkg/browser`'s `Stderr` and `Stdout` to ours

We need to connect our `Stderr` and `Stdout` to those in
`github.com/pkg/browser` so that custom writers get linked correctly in
the underlying library.

Previously, customising these writers only worked for the command
specified in the `BROWSER` environment variable, not when `BROWSER` was
unset.

1 files changed, 28 insertions, 0 deletions

diff --git a/browserenv_unix_test.go b/browserenv_unix_test.go
index 069c322..d328290 100644
--- a/browserenv_unix_test.go
+++ b/browserenv_unix_test.go
@@ -131,3 +131,31 @@ func TestOpenURLMultipleBrowserCommands(t *testing.T) {
 
 	unsetEnvBrowser(t)
 }
+
+func TestOpenFilePkgBrowserUsesStderr(t *testing.T) {
+	var stderr strings.Builder
+	Stderr = &stderr
+
+	OpenFile("file:///tmp/does-not-exist")
+
+	got := stderr.String()
+	if got == "" {
+		t.Errorf("got empty stderr want an error message")
+	}
+
+	unsetEnvBrowser(t)
+}
+
+func TestOpenURLPkgBrowserUsesStderr(t *testing.T) {
+	var stderr strings.Builder
+	Stderr = &stderr
+
+	OpenURL("file:///tmp/does-not-exist")
+
+	got := stderr.String()
+	if got == "" {
+		t.Errorf("got empty stderr want an error message")
+	}
+
+	unsetEnvBrowser(t)
+}