[JAVA] Play Framework studying test

(Reference) Books you are studying https://www.amazon.co.jp/Play-Framework-2%E5%BE%B9%E5%BA%95%E5%85%A5%E9%96%80-Java%E3%81%A7%E3%81%AF%E3%81%98%E3%82%81%E3%82%8B%E3%82%A2%E3%82%B8%E3%83%A3%E3%82%A4%E3%83%ABWeb%E9%96%8B%E7%99%BA-%E6%B4%A5%E8%80%B6%E4%B9%83/dp/4798133922/ref=cm_cr_srp_d_product_top?ie=UTF8

About the test

In the play framework, tests using a test library called JUnit are prepared as standard.

・ApplicationTest.java → Tests for application behavior

・IntegrationTest.java → A number of small tests that are integrated

ApplicationTest.java code

import com.fasterxml.jackson.databind.JsonNode;
import org.junit.*;

import play.mvc.*;
import play.test.*;
import play.data.DynamicForm;
import play.data.validation.ValidationError;
import play.data.validation.Constraints.RequiredValidator;
import play.i18n.Lang;
import play.libs.F;
import play.libs.F.*;

import static play.test.Helpers.*;
import static org.fest.assertions.Assertions.*;


/**
*
* Simple (JUnit) tests that can call all parts of a play app.
* If you are interested in mocking a whole application, see the wiki for more details.
*
*/
public class ApplicationTest {

    @Test
    public void simpleCheck() {
        int a = 1 + 1;
        assertThat(a).isEqualTo(2);
    }

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

Minimum required package

There are multiple packages that are imported, but the minimum required packages are as follows.

import org.junit.*;
import play.mvc.*;
import static play.test.Helpers.*;
import static org.fest.assertions.Assertions.*;

About the contents

simpleCheck method

The code confirms that 1 + 1 is 2, but that's not the goal, ** define a method here and use assertThat to check the value! ** means. See the following article for the operation of assertThat (a) .isEqualTo (2). (Reference) https://qiita.com/naotawool/items/6512ecbe2fd006dacfd2

 @Test
    public void simpleCheck() {
        int a = 1 + 1;
        assertThat(a).isEqualTo(2);
    }

simpleCheck method

Checking the rendered value.

@Test
    public void renderTemplate() {
        Content html = views.html.index.render("Your new application is ready.");//①
        assertThat(contentType(html)).isEqualTo("text/html");//②
        assertThat(contentAsString(html)).contains("Your new application is ready.");//③
    }

・ ContentType → Returns the content type as a String

・ ContentAsString → Extract the text of the content from Content and return it as a String

・ IsEqualTo ("text / html") → Check if it is text / html. What is text / html? (Reference) http://wa3.i-3-i.info/word15789.html

The processing flow is

① Rendering ↓ ② Check if the text type is html ↓ ③ Check the contents

Code for IntegrationTest.java

import org.junit.*;

import play.mvc.*;
import play.test.*;
import play.libs.F.*;

import static play.test.Helpers.*;
import static org.fest.assertions.Assertions.*;

import static org.fluentlenium.core.filter.FilterConstructor.*;

public class IntegrationTest {

    /**
     * add your integration test here
     * in this example we just check if the welcome page is being shown
     */
    @Test
    public void test() {
        running(testServer(3333, fakeApplication(inMemoryDatabase())), HTMLUNIT, new Callback<TestBrowser>() {
            public void invoke(TestBrowser browser) {
                browser.goTo("http://localhost:3333");//①
                assertThat(browser.pageSource()).contains("Your new application is ready.");//②
            }
        });
    }

}

About the contents

Write the test process in the method called invoke in the test method! The statement being executed is

running(testServer(・ ・ ・),HTMLUNIT,new Callback(){・ ・ ・}) 

The argument of the running method is · TestServer instance ・ Specifying WebDriver -Callback instance for callback that performs post-execution processing I understand that this is something like this.

public void invoke(TestBrower browser){}

① Access the URL of the argument with the goTo method (2) Get the page source with browser.pageSource (). This will compare it to the string displayed in TestBrowser browser