package atoi_test

import (
	"testing"

	"git.jxs.me/leetgo/atoi"
	"github.com/stretchr/testify/require"
)

func TestEmpty(t *testing.T) {
	require.Equal(t, 0, atoi.Convert(""))
}

func TestSingle(t *testing.T) {
	require.Equal(t, 7, atoi.Convert("7"))
}

func TestExample1(t *testing.T) {
	require.Equal(t, 42, atoi.Convert("42"))
}

func TestExample2(t *testing.T) {
	require.Equal(t, -42, atoi.Convert("  -42"))
}

func TestExample3(t *testing.T) {
	require.Equal(t, 4193, atoi.Convert("4193 with words"))
}

func TestZeroPrefix(t *testing.T) {
	require.Equal(t, 101, atoi.Convert("+00101"))
}

func TestOverflow(t *testing.T) {
	require.Equal(t, -2147483648, atoi.Convert("-91283472332"))
}

func TestHuge(t *testing.T) {
	require.Equal(t, 2147483647, atoi.Convert("20000000000000000000"))
}

func TestPad(t *testing.T) {
	require.Equal(t, 12345678, atoi.Convert("  0000000000012345678"))
}