玩框架2.2.1：创建Http.Context进行测试答案

【问题标题】：Play framework 2.2.1: Create Http.Context for tests玩框架2.2.1：创建Http.Context进行测试
【发布时间】：2013-11-26 00:24:14
【问题描述】：

我一直在尝试使用其构造函数创建一个用于测试的 Http.Context，但未成功。有人看到我做错了吗？

我查看了以下内容，但它仅适用于 Play 2.0：

Play framework 2.0: Store values in Http.Context

看起来类在 2.2.1 中发生了变化，并且它有更多的构造函数参数，如下所示：

https://github.com/playframework/playframework/blob/2.1.x/framework/src/play/src/main/java/play/mvc/Http.java

这是我的代码：

import java.util.Map;
import java.util.Collections;
import org.junit.*;
import static org.mockito.Mockito.*;
import play.mvc.*;
import play.test.*;
import play.mvc.Http;
import play.mvc.Http.Context;
import play.api.mvc.RequestHeader;
import static play.test.Helpers.*;
import static org.fest.assertions.Assertions.*;


public class TemplateTests {

    public static FakeApplication app;
    private final Http.Request request = mock(Http.Request.class);

    @BeforeClass
    public static void startApp() {
        app = Helpers.fakeApplication();
        Helpers.start(app);
    }

    @Before
    public void setUp() throws Exception {
        Map<String, String> flashData = Collections.emptyMap();
        Map<String, Object> argData = Collections.emptyMap();
        Long id = 2L;
        play.api.mvc.RequestHeader header = mock(play.api.mvc.RequestHeader.class);
        Http.Context context = mock(Http.Context(id, header, request , flashData, flashData, argData));
        Http.Context.current.set(context);
    }


    @Test
    public void renderTemplate() {
        Content html = views.html.index.render();
        assertThat(contentType(html)).isEqualTo("text/html");
        assertThat(contentAsString(html)).contains("myindex");
    }

    @AfterClass
    public static void stopApp() {
        Helpers.stop(app);
    }
}

这是我在运行测试时看到的错误：

play test
[info] Loading project definition from /home/user/solr-segmentexplorer/explorer/project
[info] Set current project to explorer (in build file:/home/user/solr-segmentexplorer/explorer/)
[info] Compiling 1 Java source to /home/user/solr-segmentexplorer/explorer/target/scala-2.10/test-classes...
[error] /home/user/solr-segmentexplorer/explorer/test/TemplateTests.java:33: cannot find symbol
[error] symbol  : method Context(java.lang.Long,play.api.mvc.RequestHeader,play.mvc.Http.Request,java.util.Map<java.lang.String,java.lang.String>,java.util.Map<java.lang.String,java.lang.String>,java.util.Map<java.lang.String,java.lang.Object>)
[error] location: class play.mvc.Http
[error]         Http.Context context = mock(Http.Context(id, header, request , flashData, flashData, argData));
[error]                                         ^
[error] 1 error
[error] (test:compile) javac returned nonzero exit code
[error] Total time: 3 s, completed Nov 25, 2013 11:56:36 PM

有什么想法吗？

如果我不创建上下文，我会得到：

[error] Test TemplateTests.renderTemplate failed: java.lang.RuntimeException: There is no HTTP Context available from here.

【问题讨论】：

标签： java unit-testing playframework playframework-2.2

【解决方案1】：

看起来这似乎已经为我解决了：

@Before
public void setUp() throws Exception {
    Map<String, String> flashData = Collections.emptyMap();
    Map<String, Object> argData = Collections.emptyMap();
    Long id = 2L;
    play.api.mvc.RequestHeader header = mock(play.api.mvc.RequestHeader.class);
    Http.Context context = new Http.Context(id, header, request, flashData, flashData, argData);
    Http.Context.current.set(context);
}

具体修复的部分是：

Http.Context.current.set(context);

【讨论】：

您能否详细说明究竟是什么修复了它？
部分Http.Context.current.set(context);
查看@Rozuur 的回答。
@PapaSierra 而你否决了我的回答？因为你更喜欢那个？
@PapaSierra 检查我对答案的额外说明

【解决方案2】：

只是为了提供使用 Mockito 的替代方案，只模拟您需要的东西（无需手动实例化任何类）：

private Http.Context getMockContext() {
    Http.Request mockRequest = mock(Http.Request.class);
    when(mockRequest.remoteAddress()).thenReturn("127.0.0.1");
    when(mockRequest.getHeader("User-Agent")).thenReturn("mocked user-agent");

    // ... and so on. Mock precisely what you need, then add it to your mocked Context

    Http.Context mockContext = mock(Http.Context.class);
    when(mockContext.request()).thenReturn(mockRequest);
    when(mockContext.lang()).thenReturn(Lang.forCode("en"));

    return mockContext;
}

您还可以验证这些字段是否已被使用：

@Test
public void testMockContext() {
    final Http.Context mockContext = getMockContext();

    assertThat(mockContext.request()).isNotNull();
    verify(mockContext).request();

    final String remoteAddress = mockContext.request().remoteAddress();
    assertThat(remoteAddress).isNotNull();
    assertThat(remoteAddress).isEqualTo("127.0.0.1");
    verify(mockContext.request()).remoteAddress();
}

别忘了import static org.mockito.Mockito.*

【讨论】：

【解决方案3】：

只是模拟上下文类解决了这个问题

@Before
public void setUp() throws Exception {
    Http.Context context = mock(Http.Context.class);
    Http.Context.current.set(context);
}

【讨论】：

【解决方案4】：

作为其他答案的组合：

在build.sbt:

libraryDependencies += "org.mockito" % "mockito-core" % "1.10.19" % "test"

在你的测试课中：

import play.mvc.Http;
import static org.mockito.Mockito.*;

@Before
public void setUp() throws Exception {
    Http.Context context = mock(Http.Context.class);
    Http.Flash flash = mock(Http.Flash.class);
    when(context.flash()).thenReturn(flash);
    Http.Context.current.set(context);
}

如果您需要更多，只需 Mockito 的功能。如果您看到任何异常，只需检查编译的代码。就我而言，它位于target/scala-2.11/twirl/main/views/html/main.template.scala。

【讨论】：