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)
	}
}