CalculatorTest.java
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package com.pengchao;
import org.junit.Test;
import org.junit.Before;
import static org.junit.Assert.assertEquals;
public class CalculatorTest {
private Calculator calculator;
@Before
public void setUp() {
calculator = new Calculator();
}
@Test
public void testAdd() {
assertEquals(5, calculator.add(2, 3));
}
@Test
public void testSubtract() {
assertEquals(1, calculator.subtract(3, 2));
}
@Test
public void testMultiply() {
assertEquals(6, calculator.multiply(2, 3));
}
@Test
public void testDivide() {
assertEquals(2.5, calculator.divide(5, 2), 0.001);
}
@Test(expected = ArithmeticException.class)
public void testDivideByZero() {
calculator.divide(5, 0);
}
}