Create CSS language and set up trivial ITs (#39)

16 files changed, 567 insertions, 22 deletions

diff --git a/Jenkinsfile b/Jenkinsfile
new file mode 100644
index 0000000..0503600
--- /dev/null
+++ b/Jenkinsfile
@@ -0,0 +1,127 @@
+@Library('SonarSource@1.11') _
+
+pipeline {
+    agent {
+        label 'linux'
+    }
+    parameters {
+        string(name: 'GIT_SHA1', description: 'Git SHA1 (provided by travisci hook job)')
+        string(name: 'CI_BUILD_NAME', defaultValue: 'sonar-css', description: 'Build Name (provided by travisci hook job)')
+        string(name: 'CI_BUILD_NUMBER', description: 'Build Number (provided by travisci hook job)')
+        string(name: 'GITHUB_BRANCH', defaultValue: 'master', description: 'Git branch (provided by travisci hook job)')
+        string(name: 'GITHUB_REPOSITORY_OWNER', defaultValue: 'SonarSource', description: 'Github repository owner(provided by travisci hook job)')
+    }
+    environment {
+        SONARSOURCE_QA = 'true'
+        MAVEN_TOOL = 'Maven 3.3.x'
+    }
+    stages {
+        stage('Notify') {
+            steps {
+                sendAllNotificationQaStarted()
+            }
+        }
+        stage('QA') {
+            parallel {
+                stage('ITs-lts') {
+                    agent {
+                        label 'linux'
+                    }
+                    steps {
+                        runITs "LATEST_RELEASE[6.7]"
+                    }
+                }
+
+                stage('ITs-latest') {
+                    agent {
+                        label 'linux'
+                    }
+                    steps {
+                        runITs "LATEST_RELEASE"
+                    }
+                }
+
+                stage('ITs-windows') {
+                    agent {
+                        label 'windows'
+                    }
+                    steps {
+                        runITsWindows "LATEST_RELEASE"
+                    }
+                }
+
+                stage('ITs-dev') {
+                    agent {
+                        label 'linux'
+                    }
+                    steps {
+                        runITs "DEV"
+                    }
+                }
+
+                stage('CI-windows') {
+                    agent {
+                        label 'windows'
+                    }
+                    steps {
+                        withMaven(maven: MAVEN_TOOL) {
+                            sh 'mvn.cmd clean test'
+                        }
+                    }
+                }
+            }
+            post {
+                always {
+                    sendAllNotificationQaResult()
+                }
+            }
+        }
+        stage('Promote') {
+            steps {
+                repoxPromoteBuild()
+            }
+            post {
+                always {
+                    sendAllNotificationPromote()
+                }
+            }
+        }
+    }
+}
+
+def runITs(String sqRuntimeVersion) {
+    withQAEnv {
+        withMaven(maven: MAVEN_TOOL) {
+            mavenSetBuildVersion()
+            dir('its') {
+                sh "mvn ${itBuildArguments sqRuntimeVersion}"
+            }
+        }
+    }
+}
+
+def runITsWindows(String sqRuntimeVersion) {
+    withQAEnv {
+        withMaven(maven: MAVEN_TOOL) {
+            mavenSetBuildVersion()
+            dir('its') {
+                sh "mvn.cmd ${itBuildArguments sqRuntimeVersion}"
+            }
+        }
+    }
+}
+
+def withQAEnv(def body) {
+    checkout scm
+    withCredentials([string(credentialsId: 'ARTIFACTORY_PRIVATE_API_KEY', variable: 'ARTIFACTORY_PRIVATE_API_KEY'),
+                     usernamePassword(credentialsId: 'ARTIFACTORY_PRIVATE_USER', passwordVariable: 'ARTIFACTORY_PRIVATE_PASSWORD', usernameVariable: 'ARTIFACTORY_PRIVATE_USERNAME')]) {
+        wrap([$class: 'Xvfb']) {
+            body.call()
+        }
+    }
+}
+
+String itBuildArguments(String sqRuntimeVersion) {
+    "-Pits -Dsonar.runtimeVersion=${sqRuntimeVersion} -Dorchestrator.artifactory.apiKey=${env.ARTIFACTORY_PRIVATE_API_KEY} " +
+         "-Dorchestrator.configUrl=http://infra.internal.sonarsource.com/jenkins/orch-h2.properties -Dmaven.test.redirectTestOutputToFile=false clean verify -e -V"
+}
diff --git a/its/plugin/pom.xml b/its/plugin/pom.xml
new file mode 100644
index 0000000..24aa42c
--- /dev/null
+++ b/its/plugin/pom.xml
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <parent>
+    <artifactId>its</artifactId>
+    <groupId>org.sonarsource.css</groupId>
+    <version>1.0.0-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>plugin</artifactId>
+
+
+  <dependencies>
+    <dependency>
+      <groupId>org.sonarsource.orchestrator</groupId>
+      <artifactId>sonar-orchestrator</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.sonarsource.sonarqube</groupId>
+      <artifactId>sonar-ws</artifactId>
+      <version>${sonar.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <configuration>
+          <includes>
+            <include>**/Tests.java</include>
+          </includes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+  <profiles>
+    <profile>
+      <id>qa</id>
+      <activation>
+        <property>
+          <name>env.SONARSOURCE_QA</name>
+          <value>true</value>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-dependency-plugin</artifactId>
+            <version>2.10</version>
+            <executions>
+              <execution>
+                <id>copy-plugin</id>
+                <phase>generate-test-resources</phase>
+                <goals>
+                  <goal>copy</goal>
+                </goals>
+                <configuration>
+                  <artifactItems>
+                    <artifactItem>
+                      <groupId>${project.groupId}</groupId>
+                      <artifactId>sonar-css-plugin</artifactId>
+                      <version>${project.version}</version>
+                      <type>sonar-plugin</type>
+                      <overWrite>true</overWrite>
+                    </artifactItem>
+                  </artifactItems>
+                  <outputDirectory>../../sonar-css-plugin/target</outputDirectory>
+                  <overWriteReleases>true</overWriteReleases>
+                  <overWriteSnapshots>true</overWriteSnapshots>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
+</project>
diff --git a/its/plugin/projects/css-plugin-test-project/src/file1.css b/its/plugin/projects/css-plugin-test-project/src/file1.css
new file mode 100644
index 0000000..41bf526
--- /dev/null
+++ b/its/plugin/projects/css-plugin-test-project/src/file1.css
@@ -0,0 +1,7 @@
+.class1 {
+  background-color: #2d5e8b;
+}
+.class1 .class2 {
+  background-color: #fff;
+  color: #2d5e8b;
+}
diff --git a/its/plugin/projects/css-plugin-test-project/src/file2.less b/its/plugin/projects/css-plugin-test-project/src/file2.less
new file mode 100644
index 0000000..e7396a3
--- /dev/null
+++ b/its/plugin/projects/css-plugin-test-project/src/file2.less
@@ -0,0 +1,8 @@
+@color-base: #2d5e8b;
+.class1 {
+  background-color: @color-base;
+  .class2 {
+    background-color: #fff;
+    color: @color-base;
+  }
+}
diff --git a/its/plugin/projects/css-plugin-test-project/src/file3.scss b/its/plugin/projects/css-plugin-test-project/src/file3.scss
new file mode 100644
index 0000000..c53e600
--- /dev/null
+++ b/its/plugin/projects/css-plugin-test-project/src/file3.scss
@@ -0,0 +1,9 @@
+$firstValue: 62.5%;
+
+$firstValue: 24px !default;
+
+body {
+    font-size: $firstValue;
+}
+
+// body font size = 62.5%
diff --git a/its/plugin/projects/css-plugin-test-project/src/file4.html b/its/plugin/projects/css-plugin-test-project/src/file4.html
new file mode 100644
index 0000000..499a20b
--- /dev/null
+++ b/its/plugin/projects/css-plugin-test-project/src/file4.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<title>Example</title>
+<style>
+p {
+  font-size: 5vw;
+  padding: 0 5vw;
+  line-height: 1.8em;
+  }
+</style>
+<p>Hello World!</p>
diff --git a/its/plugin/src/test/java/org/sonar/css/its/MetricsTest.java b/its/plugin/src/test/java/org/sonar/css/its/MetricsTest.java
new file mode 100644
index 0000000..232e955
--- /dev/null
+++ b/its/plugin/src/test/java/org/sonar/css/its/MetricsTest.java
@@ -0,0 +1,47 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.its;
+
+import com.sonar.orchestrator.Orchestrator;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.sonar.css.its.Tests.getProjectMeasureAsDouble;
+
+public class MetricsTest {
+
+  private static String PROJECT_KEY = "css-plugin-test-project";
+
+  @ClassRule
+  public static Orchestrator orchestrator = Tests.ORCHESTRATOR;
+
+  @BeforeClass
+  public static void prepare() {
+    orchestrator.executeBuild(Tests.createScanner(PROJECT_KEY));
+  }
+
+  @Test
+  public void test() {
+    assertThat(getProjectMeasureAsDouble("lines", PROJECT_KEY)).isEqualTo(27);
+  }
+
+}
diff --git a/its/plugin/src/test/java/org/sonar/css/its/Tests.java b/its/plugin/src/test/java/org/sonar/css/its/Tests.java
new file mode 100644
index 0000000..4e38073
--- /dev/null
+++ b/its/plugin/src/test/java/org/sonar/css/its/Tests.java
@@ -0,0 +1,91 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.its;
+
+import com.sonar.orchestrator.Orchestrator;
+import com.sonar.orchestrator.OrchestratorBuilder;
+import com.sonar.orchestrator.build.SonarScanner;
+import com.sonar.orchestrator.locator.FileLocation;
+import java.io.File;
+import java.util.Collections;
+import java.util.List;
+import org.junit.ClassRule;
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+import org.sonarqube.ws.Measures.ComponentWsResponse;
+import org.sonarqube.ws.Measures.Measure;
+import org.sonarqube.ws.client.HttpConnector;
+import org.sonarqube.ws.client.WsClient;
+import org.sonarqube.ws.client.WsClientFactories;
+import org.sonarqube.ws.client.measures.ComponentRequest;
+
+@RunWith(Suite.class)
+@Suite.SuiteClasses({
+  MetricsTest.class
+})
+public class Tests {
+
+  private static final FileLocation PLUGIN_LOCATION = FileLocation.byWildcardMavenFilename(
+    new File("../../sonar-css-plugin/target"), "sonar-css-plugin-*.jar");
+
+  @ClassRule
+  public static final Orchestrator ORCHESTRATOR;
+
+  static {
+    String defaultRuntimeVersion = "true".equals(System.getenv("SONARSOURCE_QA")) ? null : "7.2.0.13185"; // TODO LATEST_RELEASE[7.2]
+    String sqVersion = System.getProperty("sonar.runtimeVersion", defaultRuntimeVersion);
+    OrchestratorBuilder orchestratorBuilder = Orchestrator.builderEnv()
+      .addPlugin(PLUGIN_LOCATION)
+      .setSonarVersion(sqVersion);
+    ORCHESTRATOR = orchestratorBuilder.build();
+  }
+
+  public static WsClient newWsClient() {
+    return WsClientFactories.getDefault().newClient(HttpConnector.newBuilder()
+      .url(ORCHESTRATOR.getServer().getUrl())
+      .build());
+  }
+
+  public static Double getProjectMeasureAsDouble(String metricKey, String projectKey) {
+    Measure measure = getMeasure(metricKey, projectKey);
+    return (measure == null) ? null : Double.parseDouble(measure.getValue());
+  }
+
+  private static Measure getMeasure(String metricKey, String projectKey) {
+    ComponentWsResponse response = newWsClient().measures().component(new ComponentRequest()
+      .setComponent(projectKey)
+      .setMetricKeys(Collections.singletonList(metricKey)));
+    List<Measure> measures = response.getComponent().getMeasuresList();
+    return measures.size() == 1 ? measures.get(0) : null;
+  }
+
+  public static SonarScanner createScanner(String projectKey) {
+    File projectDir = FileLocation.of("projects" + File.separator + projectKey).getFile();
+
+    return SonarScanner.create()
+      .setSourceEncoding("UTF-8")
+      .setProjectDir(projectDir)
+      .setProjectKey(projectKey)
+      .setProjectName(projectKey)
+      .setProjectVersion("1.0")
+      .setSourceDirs("src");
+  }
+
+}
diff --git a/its/pom.xml b/its/pom.xml
new file mode 100644
index 0000000..f99378c
--- /dev/null
+++ b/its/pom.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <parent>
+    <artifactId>css</artifactId>
+    <groupId>org.sonarsource.css</groupId>
+    <version>1.0.0-SNAPSHOT</version>
+  </parent>
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>its</artifactId>
+  <packaging>pom</packaging>
+
+  <modules>
+    <module>plugin</module>
+  </modules>
+
+</project>
diff --git a/pom.xml b/pom.xml
index a5e5901..fd3b478 100644
--- a/pom.xml
+++ b/pom.xml
@@ -74,7 +74,7 @@
         <slf4j.version>1.7.25</slf4j.version>
         <assertj.version>3.10.0</assertj.version>
         <junit.version>4.12</junit.version>
-        <sonar.version>7.2.0.11647</sonar.version>
+        <sonar.version>7.2.0.13185</sonar.version>
         <sonar.min.version>6.7</sonar.min.version>
         <sonar-orchestrator.version>3.17.0.1491</sonar-orchestrator.version>
         <sonarlint.version>3.1.0.1376</sonarlint.version>
@@ -101,12 +101,6 @@
 
             <!-- Test dependencies -->
             <dependency>
-                <groupId>com.google.guava</groupId>
-                <artifactId>guava</artifactId>
-                <version>${guava.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
                 <version>${junit.version}</version>
@@ -119,12 +113,6 @@
                 <scope>test</scope>
             </dependency>
             <dependency>
-                <groupId>org.sonarsource.sonarqube</groupId>
-                <artifactId>sonar-testing-harness</artifactId>
-                <version>${sonar.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
                 <groupId>org.sonarsource.orchestrator</groupId>
                 <artifactId>sonar-orchestrator</artifactId>
                 <version>${sonar-orchestrator.version}</version>
@@ -166,9 +154,6 @@
         </dependencies>
     </dependencyManagement>
 
-    <!--
-    TODO: enable when ITs are added
-
     <profiles>
         <profile>
             <id>its</id>
@@ -177,6 +162,4 @@
             </modules>
         </profile>
     </profiles>
-    -->
-
 </project>
diff --git a/sonar-css-plugin/pom.xml b/sonar-css-plugin/pom.xml
index 26e8477..0ceb4b0 100644
--- a/sonar-css-plugin/pom.xml
+++ b/sonar-css-plugin/pom.xml
@@ -37,10 +37,6 @@
             <artifactId>sonar-analyzer-commons</artifactId>
         </dependency>
         <dependency>
-            <groupId>org.sonarsource.sonarqube</groupId>
-            <artifactId>sonar-testing-harness</artifactId>
-        </dependency>
-        <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
         </dependency>
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssLanguage.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssLanguage.java
new file mode 100644
index 0000000..be5e431
--- /dev/null
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssLanguage.java
@@ -0,0 +1,41 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.plugin;
+
+import org.sonar.api.config.Configuration;
+import org.sonar.api.resources.AbstractLanguage;
+
+public class CssLanguage extends AbstractLanguage {
+
+  public static final String KEY = "css";
+
+  private Configuration configuration;
+
+  public CssLanguage(Configuration configuration) {
+    super(KEY, "CSS");
+    this.configuration = configuration;
+  }
+
+  @Override
+  public String[] getFileSuffixes() {
+    return configuration.getStringArray(CssPlugin.FILE_SUFFIXES_KEY);
+  }
+
+}
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssPlugin.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssPlugin.java
index 8d2a12b..07b4feb 100644
--- a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssPlugin.java
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/CssPlugin.java
@@ -20,12 +20,32 @@
 package org.sonar.css.plugin;
 
 import org.sonar.api.Plugin;
+import org.sonar.api.config.PropertyDefinition;
+import org.sonar.api.resources.Qualifiers;
 
 public class CssPlugin implements Plugin {
 
+  static final String FILE_SUFFIXES_KEY = "sonar.css.file.suffixes";
+  public static final String FILE_SUFFIXES_DEFVALUE = ".css,.less,.scss";
+
+  private static final String CSS_CATEGORY = "CSS";
+  private static final String GENERAL_SUBCATEGORY = "General";
 
   @Override
   public void define(Context context) {
+    context.addExtensions(
+      CssLanguage.class,
+      SonarWayProfile.class,
 
+      PropertyDefinition.builder(FILE_SUFFIXES_KEY)
+        .defaultValue(FILE_SUFFIXES_DEFVALUE)
+        .name("File Suffixes")
+        .description("List of suffixes for files to analyze.")
+        .subCategory(GENERAL_SUBCATEGORY)
+        .category(CSS_CATEGORY)
+        .onQualifiers(Qualifiers.PROJECT)
+        .multiValues(true)
+        .build()
+    );
   }
 }
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/SonarWayProfile.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/SonarWayProfile.java
new file mode 100644
index 0000000..a54de22
--- /dev/null
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/SonarWayProfile.java
@@ -0,0 +1,35 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.plugin;
+
+import org.sonar.api.server.profile.BuiltInQualityProfilesDefinition;
+
+public class SonarWayProfile implements BuiltInQualityProfilesDefinition {
+
+  public static final String PROFILE_NAME = "Sonar way";
+//  private static final String PROFILE_PATH = "org/sonar/l10n/css/rules/css/Sonar_way_profile.json";
+
+  @Override
+  public void define(Context context) {
+
+    NewBuiltInQualityProfile profile = context.createBuiltInQualityProfile(PROFILE_NAME, CssLanguage.KEY);
+    profile.done();
+  }
+}
diff --git a/sonar-css-plugin/src/main/java/org/sonar/css/plugin/package-info.java b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/package-info.java
new file mode 100644
index 0000000..a7efac0
--- /dev/null
+++ b/sonar-css-plugin/src/main/java/org/sonar/css/plugin/package-info.java
@@ -0,0 +1,21 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@javax.annotation.ParametersAreNonnullByDefault
+package org.sonar.css.plugin;
diff --git a/sonar-css-plugin/src/test/java/org/sonar/css/plugin/CssPluginTest.java b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/CssPluginTest.java
new file mode 100644
index 0000000..3da86ca
--- /dev/null
+++ b/sonar-css-plugin/src/test/java/org/sonar/css/plugin/CssPluginTest.java
@@ -0,0 +1,42 @@
+/*
+ * SonarCSS
+ * Copyright (C) 2018-2018 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.css.plugin;
+
+import org.junit.Test;
+import org.sonar.api.Plugin;
+import org.sonar.api.SonarQubeSide;
+import org.sonar.api.SonarRuntime;
+import org.sonar.api.internal.SonarRuntimeImpl;
+import org.sonar.api.utils.Version;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+public class CssPluginTest {
+
+  @Test
+  public void count_extensions() throws Exception {
+    SonarRuntime runtime = SonarRuntimeImpl.forSonarQube(Version.create(6, 7), SonarQubeSide.SCANNER);
+    Plugin.Context context = new Plugin.Context(runtime);
+    Plugin underTest = new CssPlugin();
+    underTest.define(context);
+    assertThat(context.getExtensions()).hasSize(3);
+  }
+}