java - JUnit TestClass 无法识别类

Question

我正在编写我的第一个 junit 测试类。我的calculator.java类位于我的src目录中，我的测试类(CalculatorTest.java)位于test/src目录中。我的问题是 CalculatorTest 类无法识别计算器类。有什么想法吗？这是 src 目录中的计算器.java 类:

package edu.umb.cs.cs680.unittest;

public class Calculator {
public float multiply(float x, float y){
    return x*y;
}

public float divide(float x, float y){
    if(y==0){
        throw new IllegalArgumentException("division by zero");
    }
    return x/y;
}
}

这是 test/src 目录中我的 CalculatorTest 类:

package edu.umb.cs.cs680.unittest;
import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.*;
import org.junit.Test;
import edu.umb.cs.cs680.unittest.Calculator;

public class CalculatorTest{
@Test
public void multiply3By4(){
    Calculator cut = new Calculator();
    float expected = 12;
    float actual = cut.multiply(3,4);
    assertThat(actual, is(expected)); 
}

@Test
public void divide3By2(){
    Calculator cut = new Calculator();
    float expected = 1.5f;
    float actual = cut.divide(3,2);
    assertThat(actual, is(expected)); 
}

@Test(expected=IllegalArgumentException.class)
    public void divide5By0(){
    Calculator cut = new Calculator();
    cut.divide(5,0); 
}
}

这是我的 build.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project default="runjunit" name="ant project">
<property environment="env"></property>
<property name="ECLIPSE_HOME" value="${env.ECLIPSE_HOME}"></property>
<property name="junit.output.dir" value="test/bin/edu/umb/cs/cs680/unittest"></property>
<property name="bin.dir" value="bin/edu/umb/cs/cs680/unittest"></property>

<path id="JUnit 4.libraryclasspath">
    <pathelement location="lib/junit.jar"/>
    <pathelement location="lib/org.hamcrest.core_1.3.0.v201303031735.jar"/>     
</path>
<path id="HW4.classpath">       
    <path refid="JUnit 4.libraryclasspath"/>
</path>

<target name="compile">
    <mkdir dir="${bin.dir}"/>
    <mkdir dir="${junit.output.dir}"/>
    <javac includeantruntime="false" srcdir="./src" destdir="./bin" >           
        <classpath refid="HW4.classpath"></classpath>
    </javac>
    <javac includeantruntime="false" srcdir="./test/src" destdir="./test/bin" >         
        <classpath refid="HW4.classpath"></classpath>
    </javac>
</target>
<target name="clean">
    <delete dir="./bin"/>
    <delete dir="./test/bin"/>
</target>
<target name="runjunit" depends="compile">
    <junit printsummary="yes" haltonfailure="yes">
        <path refid="JUnit 4.libraryclasspath" />
        <!--<test name="test.src.edu.umb.cs.cs680.unittest.CalculatorTest" />-->
        <test name="x.CalculatorTest" />

        <classpath refid="HW4.classpath"></classpath>
    </junit>
</target>
</project>

这是错误:

cannot find symbol Calculator cut = new Calculator();

谢谢

Answer 1

My calculator.java class is in my src direcotry and my test class (CalculatorTest.java) is in test/src directory. My problem is that CalculatorTest class does not recognize the calculator class. Any thoughts?

您的文件夹结构似乎不正确，您需要具有如下所示的文件夹结构:

Calculator.java -> src/main 文件夹

CalculatorTest.java -> src/test 文件夹