Java Gradle:如何测试自定义任务输出(println)
如何测试定制Gradle任务的Java Gradle:如何测试自定义任务输出(println),java,gradle,Java,Gradle,如何测试定制Gradle任务的println输出?这是我目前的代码: class TaskTest { @Test void testSomething() { Project project = ProjectBuilder.builder().build() def task = project.task('testTask', type: Task) task.execute() <<assert
println
输出?这是我目前的代码:
class TaskTest {
@Test
void testSomething() {
Project project = ProjectBuilder.builder().build()
def task = project.task('testTask', type: Task)
task.execute()
<<assert task did println "Hello, world!">>
}
}
类任务测试{
@试验
void testSomething(){
Project=ProjectBuilder.builder().build()
def task=project.task('testTask',类型:task)
task.execute()
}
}
解决方案是用实现替换标准输出流,然后从中读取数据。您也可以对错误结束输入流执行此操作
def stdout = System.out
def os = new ByteArrayOutputStream()
System.out = new PrintStream(os)
println 'Hello World!' // implicit flush
def array = os.toByteArray()
def is = new ByteArrayInputStream(array)
System.out = stdout
def line = is.readLines()[0]
assert line == 'Hello World!'
您可以使用以下命令执行此操作:
import groovy.ui.SystemOutputInterceptor
class TaskTest {
@Test
void testSomething() {
def expected = 'expectedOutput'
def actual ='';
def interceptor = new SystemOutputInterceptor({ actual += it; false});
Project project = ProjectBuilder.builder().build()
def task = project.task('testTask', type: Task)
interceptor.start()
task.execute()
interceptor.stop()
assert actual.trim() == expected
}
}
编辑:
如果您想用于您的,您也可以这样测试:
class TaskTest extends spock.lang.Specification {
def "should print test to stdout"() {
given:
def expected = 'expectedOutput'
System.out = Mock(PrintStream)
Project project = ProjectBuilder.builder().build()
def task = project.task('testTask', type: Task)
when:
task.execute()
then:
1 * System.out.println(expected)
}
}
在Java中模拟System.out
应该可以使用