Add basic support for JUnit 5

#35

This is missing the ability to mix and match parameters
supported by Burst with parameters supported by JUnit 5.

burst-gradle-plugin/src/test/kotlin/app/cash/burst/gradle/BurstGradlePluginTest.kt

@@ -261,6 +261,25 @@ class BurstGradlePluginTest {
     }
   }
 
+  @Test
+  fun junit5() {
+    val projectDir = File("src/test/projects/junit5")
+
+    val taskName = ":lib:test"
+    val result = createRunner(projectDir, "clean", taskName).build()
+    assertThat(result.task(taskName)!!.outcome).isIn(*SUCCESS_OUTCOMES)
+
+    val testResults = projectDir.resolve("lib/build/test-results")
+
+    with(readTestSuite(testResults.resolve("test/TEST-CoffeeTest_Regular.xml"))) {
+      assertThat(testCases.map { it.name }).containsExactlyInAnyOrder(
+        "test_Milk()",
+        "test_None()",
+        "test_Oat()",
+      )
+    }
+  }
+
   private fun createRunner(
     projectDir: File,
     vararg taskNames: String,

burst-gradle-plugin/src/test/projects/junit5/build.gradle.kts

@@ -0,0 +1,41 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
+
+buildscript {
+  repositories {
+    maven {
+      url = file("$rootDir/../../../../../build/testMaven").toURI()
+    }
+    mavenCentral()
+    google()
+  }
+  dependencies {
+    classpath("app.cash.burst:burst-gradle-plugin:${project.property("burstVersion")}")
+    classpath(libs.kotlin.gradlePlugin)
+  }
+}
+
+allprojects {
+  repositories {
+    maven {
+      url = file("$rootDir/../../../../../build/testMaven").toURI()
+    }
+    mavenCentral()
+    google()
+  }
+
+  tasks.withType(JavaCompile::class.java).configureEach {
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
+  }
+
+  tasks.withType(KotlinJvmCompile::class.java).configureEach {
+    compilerOptions {
+      jvmTarget.set(JvmTarget.JVM_1_8)
+    }
+  }
+
+  tasks.withType<Test> {
+    useJUnitPlatform()
+  }
+}

burst-gradle-plugin/src/test/projects/junit5/lib/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+  kotlin("jvm")
+  id("app.cash.burst")
+}
+
+dependencies {
+  testImplementation(kotlin("test"))
+}

burst-gradle-plugin/src/test/projects/junit5/lib/src/test/kotlin/CoffeeTest.kt

@@ -0,0 +1,22 @@
+import app.cash.burst.Burst
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+
+@Burst
+class CoffeeTest(
+  private val espresso: Espresso,
+) {
+  @BeforeTest
+  fun setUp() {
+    println("set up $espresso")
+  }
+
+  @Test
+  fun test(dairy: Dairy) {
+    println("running $espresso $dairy")
+  }
+}
+
+enum class Espresso { Decaf, Regular, Double }
+
+enum class Dairy { None, Milk, Oat }

burst-gradle-plugin/src/test/projects/junit5/settings.gradle.kts

@@ -0,0 +1,9 @@
+dependencyResolutionManagement {
+  versionCatalogs {
+    create("libs") {
+      from(files("../../../../../gradle/libs.versions.toml"))
+    }
+  }
+}
+
+include(":lib")

burst-kotlin-plugin/src/main/kotlin/app/cash/burst/kotlin/BurstApis.kt

@@ -37,6 +37,10 @@ internal class BurstApis private constructor(
         return BurstApis(pluginContext, junitPackage)
       }
 
+      if (pluginContext.referenceClass(junit5TestClassId) != null) {
+        return BurstApis(pluginContext, junit5Package)
+      }
+
       if (pluginContext.referenceClass(kotlinTestClassId) != null) {
         return BurstApis(pluginContext, kotlinTestPackage)
       }
@@ -56,11 +60,15 @@ private val burstValuesId = burstFqPackage.callableId("burstValues")
 
 private val junitPackage = FqPackageName("org.junit")
 private val junitTestClassId = junitPackage.classId("Test")
+private val junit5Package = FqPackageName("org.junit.jupiter.api")
+private val junit5TestClassId = junit5Package.classId("Test")
 private val kotlinTestPackage = FqPackageName("kotlin.test")
 private val kotlinTestClassId = kotlinTestPackage.classId("Test")
 
 internal val IrAnnotationContainer.hasAtTest: Boolean
-  get() = hasAnnotation(junitTestClassId) || hasAnnotation(kotlinTestClassId)
+  get() = hasAnnotation(junitTestClassId) ||
+    hasAnnotation(junit5TestClassId) ||
+    hasAnnotation(kotlinTestClassId)
 
 internal val IrAnnotationContainer.hasAtBurst: Boolean
   get() = hasAnnotation(burstAnnotationId)