StringTest.java

package com.junit.quick.start;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class StringTest {
	
	@BeforeClass
	public static void beforeClass(){
		System.out.println("beforeClass");
	}

	@Test
	public void testToLearnAssertEquals() {
		System.out.println("test1");
		//actualOutput = Math.min(5,10)
		//expectedOutput = 5
		int actualOutput = Math.min(5, 10);
		int expectedOutput = 5;
		
		assertEquals(expectedOutput, actualOutput);
		//assertEquals(3,2);//expected 3 but was 2
		//assertEquals(2,3);//expected 2 but was 3
		//assertEquals(3,3);//success
	}
	
	@Test
	public void testToCheckStringUppercase() {
		//actualOutput = Math.min(5,10)
		//expectedOutput = 5
		System.out.println("test2");
		String value = "abcdefgh";
		String actualOutput = value.toUpperCase();
		String expectedOutput = "ABCDEFGH";
		
		assertEquals(expectedOutput, actualOutput);
		//assertEquals(3,2);//expected 3 but was 2
		//assertEquals(2,3);//expected 2 but was 3
		//assertEquals(3,3);//success
	}	

	@Test(expected=NullPointerException.class)
	public void testToCheckStringUppercaseNullPointer() {
		System.out.println("test2");
		String value = null;
		String actualOutput = value.toUpperCase();
	}	

	@AfterClass
	public static void afterAnything(){
		System.out.println("afterClass");
	}
	
}