gradle這個compileJava錯誤：包org.junit不存在

Question

我想實現一個簡單的JUnit測試的gradle使用並運行到以下問題，當我運行gradle test：

:compileJava 
/Users/wogsland/Projects/gradling/src/test/CalculatorTest.java:1: error: package org.junit does not exist 
import static org.junit.Assert.assertEquals; 
        ^
/Users/wogsland/Projects/gradling/src/test/CalculatorTest.java:1: error: static import only from classes and interfaces 
import static org.junit.Assert.assertEquals; 
^ 
/Users/wogsland/Projects/gradling/src/test/CalculatorTest.java:2: error: package org.junit does not exist 
import org.junit.Test; 
       ^
/Users/wogsland/Projects/gradling/src/test/CalculatorTest.java:5: error: cannot find symbol 
    @Test 
^
    symbol: class Test 
    location: class CalculatorTest 
/Users/wogsland/Projects/gradling/src/test/CalculatorTest.java:9: error: cannot find symbol 
    assertEquals(6, sum); 
    ^
    symbol: method assertEquals(int,int) 
    location: class CalculatorTest 
5 errors 
:compileJava FAILED 

FAILURE: Build failed with an exception. 

* What went wrong: 
Execution failed for task ':compileJava'. 
Compilation failed; see the compiler error output for details. 

所以我有這個build.gradle文件：

apply plugin: 'java' 

dependencies { 
    testCompile 'junit:junit:4.12' 
} 

sourceSets { 
    main { 
    java { 
     srcDir 'src' 
    } 
    } 
} 

而且CalculatorTest.java：

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

public class CalculatorTest { 
    @Test 
    public void evaluatesExpression() { 
    Calculator calculator = new Calculator(); 
    int sum = calculator.evaluate("1+2+3"); 
    assertEquals(6, sum); 
    } 
} 

但我不明白爲什麼它沒有找到junit，當我將它包含在依賴關係中時。

Answer 1

因此很明顯，我需要添加一個compile依賴，然後又宣佈repositories。我的新build.gradle，成功運行測試：

apply plugin: 'java' 

repositories { jcenter() } 
dependencies { 
    testCompile 'junit:junit:4.12' 
    compile 'junit:junit:4.12' 
} 

sourceSets { 
    main { 
     java { 
      srcDir 'src' 
     } 
    } 
} 

Answer 2

嘗試增加

repositories { 
    maven { url 'http://repo1.maven.org/maven2' } 

直接在buildscript {下的build.gradle