Replace PhantomJS with Headless Chrome for testing (fixes #400)

CONTRIBUTING.md

@@ -21,9 +21,8 @@ If you want to contribute code or documentation please follow the following work
 ## System Requirements
 
 * JDK 8 (`JAVA_HOME` and `PATH` should be set accordingly)
-    - Note that JGiven is built and compatible with Java 1.6, however, because of some test libraries, Java 8 is required for executing the tests in the `jgiven-tests` project
+    - Note that JGiven is built and compatible with Java 7, however, because of some test libraries, Java 8 is required for executing the tests in the `jgiven-tests` project
 * Gradle (is automatically downloaded by the `gradlew` script)
-* PhantomJS (required for the Selenium tests of the HTML5 report, can be installed, for example, with `npm install -g phantomjs-prebuilt`)
 
 ## Building and Testing JGiven
 

jgiven-tests/build.gradle

@@ -11,7 +11,7 @@ dependencies {
 
     testCompile "org.assertj:assertj-core:$assertjVersion"
     testCompile 'org.seleniumhq.selenium:selenium-java:3.141.59'
-    testCompile 'com.codeborne:phantomjsdriver:1.4.4'
+    testCompile 'io.github.bonigarcia:webdrivermanager:3.4.0'
     testCompile 'org.apache.commons:commons-io:1.3.2'
 }
 sourceCompatibility = targetCompatibility = 1.8

jgiven-tests/src/test/java/com/tngtech/jgiven/report/html5/Html5AppTest.java

@@ -7,6 +7,8 @@
 import java.util.List;
 import java.util.Map;
 
+import io.github.bonigarcia.wdm.ChromeDriverManager;
+import io.github.bonigarcia.wdm.DriverManagerType;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -15,7 +17,6 @@
 import org.openqa.selenium.OutputType;
 import org.openqa.selenium.TakesScreenshot;
 import org.openqa.selenium.WebDriver;
-import org.openqa.selenium.phantomjs.PhantomJSDriver;
 
 import com.tngtech.java.junit.dataprovider.DataProvider;
 import com.tngtech.java.junit.dataprovider.DataProviderRunner;
@@ -35,6 +36,8 @@
 import com.tngtech.jgiven.tags.FeatureTags;
 import com.tngtech.jgiven.tags.FeatureTagsWithCustomStyle;
 import com.tngtech.jgiven.tags.Issue;
+import org.openqa.selenium.chrome.ChromeDriver;
+import org.openqa.selenium.chrome.ChromeOptions;
 
 @BrowserTest
 @FeatureHtml5Report
@@ -54,7 +57,15 @@ public class Html5AppTest extends JGivenScenarioTest<GivenReportModels<?>, WhenH
 
     @BeforeClass
     public static void setupWebDriver() {
-        webDriver = new PhantomJSDriver();
+        ChromeDriverManager.getInstance(DriverManagerType.CHROME).setup();
+
+        ChromeOptions options = new ChromeOptions();
+        options.addArguments("--headless");
+        options.addArguments("--disable-gpu");
+        options.addArguments("window-size=1280x768");
+
+        webDriver = new ChromeDriver(options);
+
         webDriver.manage().window().setSize( new Dimension( 1280, 768 ) );
     }