//nolint:testpackage // white-box tests reach unexported state (approved 2026-07-07)
package game

import "testing"

// TestRedrawCommandForcesFullRepaint pins CTRL-R to a forced repaint
// rather than an ordinary refresh. C's arm is "after = FALSE;
// clearok(curscr, TRUE); wrefresh(curscr);" (command.c), and the
// clearok is the command: a diffing refresh compares the new frame
// against the device's record of the old one and sends nothing when they
// agree, which is exactly the situation after some other program has
// scribbled on the terminal. Only the terminal can tell the difference,
// so the test watches the terminal rather than the window contents.
func TestRedrawCommandForcesFullRepaint(t *testing.T) {
	t.Parallel()

	g := mkGameInput(t)

	term, ok := g.scr.term.(*testTerm)
	if !ok {
		t.Fatal("game terminal is not a testTerm")
	}

	before := term.repaints
	g.After = true

	g.dispatch(CTRL('R'))

	if term.repaints != before+1 {
		t.Errorf("terminal repainted %d times, want %d: CTRL-R did not force "+
			"a full redraw", term.repaints-before, 1)
	}

	if g.After {
		t.Error("CTRL-R consumed a turn; C sets after = FALSE")
	}
}