JUnit实战(1) - JUnit起步(Parameterized参数化测试)

public class Calculator {
    public double add(double number1, double number2) {
        return number1 + number2;
    }
}

import static org.junit.Assert.*;
import junit.framework.Assert;

import org.junit.Test;

public class CalculatorTest {
    @Test
    public void testAdd() {
        Calculator calculator = new Calculator();
        double result = calculator.add(10, 50);
        assertEquals(60, result, 0);
    }
}

import static org.junit.Assert.assertEquals;

import java.util.Arrays;
import java.util.Collection;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(value=Parameterized.class)
public class ParameterizedCalculatorTest {

    private double expected; 
    private double valueOne; 
    private double valueTwo; 

    @Parameters 
    public static Collection<Integer[]> getTestParameters() {
       return Arrays.asList(new Integer[][] {
          {2, 1, 1},  //expected, valueOne, valueTwo   
          {3, 2, 1},  //expected, valueOne, valueTwo   
          {4, 3, 1},  //expected, valueOne, valueTwo   
       });
    }

    public ParameterizedCalculatorTest(double expected, 
       double valueOne, double valueTwo) {
       this.expected = expected;
       this.valueOne = valueOne;
       this.valueTwo = valueTwo;
    }

    @Test
    public void sum() {
       Calculator calc = new Calculator();
       assertEquals(expected, calc.add(valueOne, valueTwo), 0);
    } 
}