package main;

import static org.junit.Assert.*;

import org.junit.Rule;

import org.junit.rules.ExpectedException;

import org.junit.Test;

public class String2LongTest {

String2Long s2i = new String2Long();

@Rule

public ExpectedException exception = ExpectedException.none();

@Test

//Valid test cases

public void testStringToLong() {

assertEquals(0, s2i.stringToLong("00")); //zero

assertEquals(500, s2i.stringToLong("500")); //no sign number string

assertEquals(500, s2i.stringToLong("+500")); //+ sign number string

assertEquals(-500, s2i.stringToLong("-500")); //- sign number string

//huge integer

assertEquals(Integer.MAX_VALUE, s2i.stringToLong(Integer.toString(Integer.MAX_VALUE)));

//small integer

assertEquals(Integer.MIN_VALUE, s2i.stringToLong(Integer.toString(Integer.MIN_VALUE)));

//huge long

assertEquals(Long.MAX_VALUE, s2i.stringToLong(Long.toString(Long.MAX_VALUE)));

//small long

assertEquals(Long.MIN_VALUE, s2i.stringToLong(Long.toString(Long.MIN_VALUE)));

}

@Test

//IllegalArgument cases

public void testStringToIntIllegalArgument() {

exception.expect(IllegalArgumentException.class);

s2i.stringToLong(""); //empty string

s2i.stringToLong(null); //null string

}

@Test

//NumberFormatException cases

public void testStringToIntNumberFormatException() {

exception.expect(NumberFormatException.class);

s2i.stringToLong("e21");

s2i.stringToLong("1.666");

s2i.stringToLong("9zzaww");

s2i.stringToLong(" ");

assertEquals(500, s2i.stringToLong(" 500"));

s2i.stringToLong(Long.toString(Long.MAX_VALUE) + "11");

s2i.stringToLong(Long.toString(Long.MIN_VALUE) + "11");

}

}