Cthulhu is no longer a fork. Now it is a screen reader written in Golang.

internal/braille/regions_test.go

@@ -0,0 +1,35 @@
+package braille
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestLineComposesFocusedRegionWithoutChangingSpacing(t *testing.T) {
+	line := Line{Regions: []Region{
+		{Text: "Context "},
+		{Text: "é界", Cursor: 1},
+		{Text: " entry"},
+	}, Focus: 1}
+	frame, err := line.Frame()
+	if err != nil || !reflect.DeepEqual(frame, Frame{Text: "Context é界 entry", Cursor: 9}) {
+		t.Fatalf("frame=%+v err=%v", frame, err)
+	}
+	line.Focus = -1
+	frame, err = line.Frame()
+	if err != nil || frame.Cursor != -1 {
+		t.Fatalf("unfocused frame=%+v err=%v", frame, err)
+	}
+}
+
+func TestLineRejectsInvalidFocusAndCursor(t *testing.T) {
+	for _, line := range []Line{
+		{Focus: 0},
+		{Regions: []Region{{Text: "x"}}, Focus: -2},
+		{Regions: []Region{{Text: "x", Cursor: 2}}, Focus: 0},
+	} {
+		if _, err := line.Frame(); err == nil {
+			t.Fatalf("accepted invalid line %+v", line)
+		}
+	}
+}