Upgrade to JUnit 5 !!!

This commit also enables per class test lifecycle which allows
faster test execution and non static @BeforeAll / @afterall
member functions.

build.gradle.kts

@@ -39,7 +39,7 @@ repositories {
 tasks.withType<KotlinCompile> {
     kotlinOptions {
         jvmTarget = "1.8"
-		freeCompilerArgs = listOf("-Xjsr305-annotations=enable")
+        freeCompilerArgs = listOf("-Xjsr305-annotations=enable")
     }
 }
 
@@ -57,18 +57,24 @@ dependencies {
     }
     compileOnly("org.springframework:spring-context-indexer")
     compile("org.springframework.boot:spring-boot-starter-data-mongodb-reactive")
-    testCompile("org.springframework.boot:spring-boot-starter-test")
+
     runtime("de.flapdoodle.embed:de.flapdoodle.embed.mongo")
     compile("com.samskivert:jmustache:1.13")
     compile("com.atlassian.commonmark:commonmark:0.9.0")
     compile("com.atlassian.commonmark:commonmark-ext-autolink:0.9.0")
 
-	compile("com.google.code.findbugs:jsr305:3.0.2") // Needed for now, could be removed when KT-19419 will be fixed
-
-    testCompile("io.projectreactor:reactor-test")
+    compile("com.google.code.findbugs:jsr305:3.0.2") // Needed for now, could be removed when KT-19419 will be fixed
 
     compile("com.fasterxml.jackson.module:jackson-module-kotlin")
     compile("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
+
+    testCompile("org.springframework.boot:spring-boot-starter-test") {
+        exclude(module = "junit")
+    }
+    testCompile("org.junit.jupiter:junit-jupiter-api")
+    testRuntime("org.junit.jupiter:junit-jupiter-engine")
+    testRuntime("org.junit.platform:junit-platform-launcher")
+    testCompile("io.projectreactor:reactor-test")
 }
 
 task<GulpTask>("gulpBuild") {

src/test/kotlin/mixit/integration/AbstractIntegrationTests.kt

@@ -1,14 +1,14 @@
 package mixit.integration
 
-import org.junit.Before
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.extension.ExtendWith
 import org.springframework.boot.test.context.SpringBootTest
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment
 import org.springframework.boot.web.server.LocalServerPort
-import org.springframework.test.context.junit4.SpringRunner
+import org.springframework.test.context.junit.jupiter.SpringExtension
 import org.springframework.web.reactive.function.client.WebClient
 
-@RunWith(SpringRunner::class)
+@ExtendWith(SpringExtension::class)
 @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
 abstract class AbstractIntegrationTests {
 
@@ -17,7 +17,7 @@ abstract class AbstractIntegrationTests {
 
     lateinit var client: WebClient
 
-    @Before
+    @BeforeAll
     fun setup() {
         client = WebClient.create("http://localhost:$port")
     }

src/test/kotlin/mixit/integration/EventIntegrationTests.kt

@@ -1,9 +1,8 @@
 package mixit.integration
 
 import mixit.model.Event
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
 import org.springframework.http.MediaType.APPLICATION_JSON
 import org.springframework.web.reactive.function.client.bodyToMono
 import org.springframework.web.reactive.function.client.bodyToFlux

src/test/kotlin/mixit/integration/TalkIntegrationTests.kt

@@ -1,8 +1,8 @@
 package mixit.integration
 
 import mixit.model.Talk
-import org.junit.Assert.assertEquals
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
 import org.springframework.http.MediaType.APPLICATION_JSON
 import org.springframework.web.reactive.function.client.bodyToFlux
 import reactor.test.test

src/test/kotlin/mixit/integration/UserIntegrationTests.kt

@@ -2,9 +2,8 @@ package mixit.integration
 
 import mixit.model.Role
 import mixit.model.User
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertTrue
-import org.junit.Test
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
 import org.springframework.http.MediaType.APPLICATION_JSON
 import org.springframework.web.reactive.function.client.bodyToFlux
 import org.springframework.web.reactive.function.client.bodyToMono

src/test/kotlin/mixit/integration/WebsiteIntegrationTests.kt

@@ -1,6 +1,6 @@
 package mixit.integration
 
-import org.junit.Test
+import org.junit.jupiter.api.Test
 import org.springframework.http.HttpStatus.*
 import org.springframework.http.MediaType.*
 import reactor.test.test

src/test/kotlin/mixit/util/ExtensionsTest.kt

@@ -1,8 +1,7 @@
 package mixit.util
 
-import org.junit.Test
-
-import org.junit.Assert.*
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.Test
 
 /**
  * Unit tests for Extensions

src/test/resources/junit-platform.properties

@@ -0,0 +1 @@
+junit.jupiter.testinstance.lifecycle.default = per_class