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testant
  -src
    -my
      -example
          -ant
            Calculator.java
  -test
    -my
      -example
          -ant
            TestCalculator.java


ÆäÖÐCalculator.javaµÄ´úÂëÈçÏ£º
package my.example.ant;
public class Calculator
{
    public double add(double number1,double number2)
    {
        return number1+number2;
    }
    public double sub(double number1,double number2)
    {
        return number1-number2;
    }
    public double mul(double number1,double number2)
    {
        return number1*number2;
    }
}


TestCalculator.javaÖдúÂëÈçÏ£º
package my.example.ant.Calculator;
import static org.junit.Assert.*;
import org.junit.*;
public class TestCalculator{
@Test
public void testAdd(){
Calculator calc=new Calculator();
double result=calc.add(10,20);
assertEquals(30.0,result,0);
}
}