package editor

import "testing"

func TestNewRow(t *testing.T) {
	str := "abcdefg"
	row := newRow(str)

	got := string(row.chars)
	want := str

	if got != want {
		t.Errorf("Row chars not equal to original string. Row: %q, String: %q", row, str)
	}
}

func TestRowSize(t *testing.T) {
	str := "abcdefg"
	row := newRow(str)

	got := row.size()
	want := 7

	if got != want {
		t.Errorf("Row size not equal to number of runes in original string")
	}
}

func TestRenderSize(t *testing.T) {
	str := "\tabcdefg"
	row := newRow(str)
	row.update()

	got := row.rSize()
	want := 11

	if got != want {
		t.Errorf("Row rsize not equal to number of runes in original string")
	}
}

type insertRune struct {
	initial string
	ch      rune
	at      int
}

var insertRuneTests = []insertRune{
	{"abde", 'c', 2},
	{"bcde", 'a', 0},
	{"abcd", 'e', 4},
	{"abcd", 'e', 17},
	{"abcd", 'e', -2},
}

func TestInsertRune(t *testing.T) {
	for _, test := range insertRuneTests {
		row := newRow(test.initial)
		row.insertRune(test.ch, test.at)

		if row.size() != 5 {
			t.Errorf("Row size after inserting rune at index [%d] is %d, should be %d", test.at, row.size(), 5)
		}

		got := row.toString()
		want := "abcde"

		if got != want {
			t.Errorf("Row after update is '%s', should be '%s'", got, want)
		}
	}
}