Reset master to testing content

internal/braille/unavailable_test.go

@@ -0,0 +1,21 @@
+//go:build !brlapi || !cgo
+
+package braille
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"testing"
+)
+
+func TestDiagnosticUnavailable(t *testing.T) {
+	var output bytes.Buffer
+	err := Diagnostic(context.Background(), New(), &output)
+	if !errors.Is(err, ErrUnavailable) {
+		t.Fatalf("error: %v", err)
+	}
+	if output.Len() != 0 {
+		t.Fatal("unavailable backend reported connected")
+	}
+}