Function TestBackspaceImmediatelyAfterChipRemovesIt

internal/tui/prompt_test.go:473–485

TestBackspaceImmediatelyAfterChipRemovesIt: atomic-delete regression guard, after a paste the cursor sits at chip.end, so one Backspace deletes the chip without any manual cursor setup.

(t *testing.T)

// after a paste the cursor sits at chip.end, so one Backspace deletes the chip
// without any manual cursor setup.
func TestBackspaceImmediatelyAfterChipRemovesIt(t *testing.T) {
	p := newChippablePrompt()
	p, _ = p.Update(pasteKey(makePaste(10)))
	// InsertString leaves the cursor at chip.end, tripping the atomic path.
	p, _ = p.Update(tea.KeyMsg{Type: tea.KeyBackspace})

	if len(p.spans) != 0 {
		t.Fatalf("single Backspace right after paste should remove chip, spans=%+v", p.spans)
	}
	if p.DisplayValue() != "" {
		t.Fatalf("prompt should be empty after chip delete, got %q", p.DisplayValue())
	}
}

// TestPasteIntoChipInteriorKeepsBothPastes: a paste while the cursor sits inside
// an existing chip's label must not splice the new label into the old one.