Replace Python launcher with native Go UI

cmd/barnard-ui/terminal_ui_test.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestWrapLinesPreservesParagraphsAndBoundsWidth(t *testing.T) {
+	got := wrap_lines("one two three\n\nfour", 7)
+	want := []string{"one two", "three", "", "four"}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("wrap_lines = %#v; want %#v", got, want)
+	}
+}
+
+func TestWrapLinesMakesProgressWhenRuneIsWiderThanScreen(t *testing.T) {
+	got := wrap_lines("界a", 1)
+	want := []string{"界", "a"}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("wrap_lines = %#v; want %#v", got, want)
+	}
+}
+
+func TestVisibleInputMasksPasswords(t *testing.T) {
+	got, cursor := visible_input([]rune("secret"), 6, true, 20)
+	if string(got) != "******" || cursor != 6 {
+		t.Fatalf("visible_input = %q at %d; want masked text at 6", string(got), cursor)
+	}
+}
+
+func TestVisibleInputKeepsEditingCursorOnScreen(t *testing.T) {
+	got, cursor := visible_input([]rune("abcdefghij"), 5, false, 4)
+	if string(got) != "cdef" || cursor != 3 {
+		t.Fatalf("visible_input = %q at %d; want cdef at 3", string(got), cursor)
+	}
+}
+
+func TestVisibleInputUsesTerminalColumnWidths(t *testing.T) {
+	got, cursor := visible_input([]rune("a界b"), 2, false, 3)
+	if string(got) != "界b" || cursor != 2 {
+		t.Fatalf("visible_input = %q at %d; want 界b at 2", string(got), cursor)
+	}
+}
+
+func TestChoiceLabelDoesNotChangeWithSelection(t *testing.T) {
+	selected := choice_label("Connect", true)
+	unselected := choice_label("Connect", false)
+	if selected != "Connect" || unselected != "Connect" {
+		t.Fatalf("choice labels = %q and %q; selection must be represented only by the cursor", selected, unselected)
+	}
+}