Update

Author: Nickolay Savchenko

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

test-server/build.gradle

@@ -1,5 +1,5 @@
-group 'ua.naiksoftware.example_server'
-version '1.0-SNAPSHOT'
+group 'ua.naiksoftware.test_server'
+version '1.0'
 
 buildscript {
 
@@ -27,12 +27,24 @@ repositories {
 }
 
 dependencies {
-    compile("org.springframework.boot:spring-boot-starter-websocket")
+    compile 'org.springframework.boot:spring-boot-starter-websocket'
+    compile 'org.springframework.boot:spring-boot-starter-web'
     compile 'org.codehaus.groovy:groovy-all:2.4.15'
+
+    testCompile 'org.springframework.boot:spring-boot-starter-test'
+    testCompile 'org.springframework.security:spring-security-test'
+    testCompile 'org.testcontainers:testcontainers:1.8.0'
+    testCompile 'org.spockframework:spock-core:1.1-groovy-2.4'
+    testCompile 'org.spockframework:spock-spring:1.1-groovy-2.4'
 }
 
 dependencyManagement {
     imports {
         mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
     }
 }
+
+bootJar {
+    destinationDir = new File("./build/artifacts")
+}
+

test-server/src/test/groovy/BaseContextLoader.groovy

@@ -0,0 +1,33 @@
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.context.ApplicationContextInitializer
+import org.springframework.context.ConfigurableApplicationContext
+import org.springframework.test.context.ActiveProfiles
+import org.springframework.test.context.ContextConfiguration
+import org.testcontainers.containers.BindMode
+import org.testcontainers.containers.GenericContainer
+import org.testcontainers.containers.wait.strategy.Wait
+import spock.lang.Shared
+import spock.lang.Specification
+import ua.naiksoftware.test_server.Main
+
+@ActiveProfiles(['test'])
+@SpringBootTest(classes = Main.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@ContextConfiguration(initializers = BaseContextLoader.class)
+class BaseContextLoader extends Specification implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    @Shared
+    static GenericContainer testServer
+
+    @Override
+    void initialize(ConfigurableApplicationContext configurableApplicationContext) {
+
+        new ProcessBuilder('./gradlew bootJar')
+                .start().waitForProcessOutput(System.out as Appendable, System.err as Appendable)
+
+        testServer = new GenericContainer('openjdk:8-jre-alpine')
+                .withClasspathResourceMapping('./build/artifacts/test-server-1.0.jar', '/app.jar', BindMode.READ_ONLY)
+                .withCommand('java -jar /app.jar')
+                .waitingFor(Wait.forHttp('/health'))
+                .withExposedPorts(80)
+    }
+}