WIP. Proving that DAGP can handle suspend functions.

src/functionalTest/groovy/com/autonomousapps/jvm/AbstractJvmSpec.groovy

@@ -12,7 +12,7 @@ abstract class AbstractJvmSpec extends AbstractFunctionalSpec {
   @SuppressWarnings('unused')
   def cleanup() {
     if (gradleProject != null && shouldClean) {
-      clean(gradleProject.rootDir)
+//      clean(gradleProject.rootDir)
     }
   }
 }

src/functionalTest/groovy/com/autonomousapps/jvm/KotlinSuspendSpec.groovy

@@ -0,0 +1,29 @@
+package com.autonomousapps.jvm
+
+import com.autonomousapps.android.AbstractAndroidSpec
+import com.autonomousapps.jvm.projects.KotlinSuspendProject
+
+import static com.autonomousapps.advice.truth.BuildHealthSubject.buildHealth
+import static com.autonomousapps.utils.Runner.build
+import static com.google.common.truth.Truth.assertAbout
+
+@SuppressWarnings('GroovyAssignabilityCheck')
+final class KotlinSuspendSpec extends AbstractJvmSpec {
+
+  def "can detect functions that take suspend parameters (#gradleVersion)"() {
+    given:
+    def project = new KotlinSuspendProject()
+    gradleProject = project.gradleProject
+
+    when:
+    build(gradleVersion, gradleProject.rootDir, 'buildHealth')
+
+    then:
+    assertAbout(buildHealth())
+      .that(project.actualBuildHealth())
+      .isEquivalentIgnoringModuleAdvice(project.expectedBuildHealth)
+
+    where:
+    gradleVersion << gradleVersions()
+  }
+}

src/functionalTest/groovy/com/autonomousapps/jvm/projects/KotlinSuspendProject.groovy

@@ -0,0 +1,88 @@
+package com.autonomousapps.jvm.projects
+
+import com.autonomousapps.AbstractProject
+import com.autonomousapps.kit.*
+import com.autonomousapps.model.ProjectAdvice
+
+import static com.autonomousapps.AdviceHelper.actualProjectAdvice
+import static com.autonomousapps.AdviceHelper.emptyProjectAdviceFor
+import static com.autonomousapps.kit.Dependency.project
+
+final class KotlinSuspendProject extends AbstractProject {
+
+  final GradleProject gradleProject
+
+  KotlinSuspendProject() {
+    this.gradleProject = build()
+  }
+
+  private GradleProject build() {
+    def builder = newGradleProjectBuilder()
+    builder.withRootProject { root ->
+      root.gradleProperties = GradleProperties.minimalJvmProperties()
+    }
+    builder.withSubproject('consumer') { consumer ->
+      consumer.withBuildScript { bs ->
+        bs.plugins = [Plugin.kotlinPluginNoVersion]
+        bs.dependencies = [
+          project('implementation', ':producer')
+        ]
+      }
+      consumer.sources = consumerSources
+    }
+    builder.withSubproject('producer') { producer ->
+      producer.withBuildScript { bs ->
+        bs.plugins = [Plugin.kotlinPluginNoVersion]
+      }
+      producer.sources = producerSources
+    }
+
+    def project = builder.build()
+    project.writer().write()
+    return project
+  }
+
+  private static final List<Source> consumerSources = [
+    new Source(
+      SourceType.KOTLIN, 'Consumer.kt', 'com/example/consumer',
+      '''\
+        package com.example.consumer
+
+        import com.example.producer.*
+
+        internal class Consumer {
+
+          fun doTheThing() {
+            complicatedThing(Datum()) {
+              getApiResult()
+            }
+          }
+
+          suspend fun getApiResult(): ApiResult<String, String> = TODO()
+        }'''.stripIndent()
+    )
+  ]
+
+  private static final List<Source> producerSources = [
+    new Source(
+      SourceType.KOTLIN, 'Producer.kt', 'com/example/producer',
+      '''\
+        package com.example.producer
+
+        fun <E : Any> complicatedThing(
+          datum: Datum,
+          body: suspend () -> ApiResult<*, E>
+        ): Unit = TODO()
+
+        class Datum
+
+        class ApiResult<A, B>'''.stripIndent()
+    )
+  ]
+
+  Set<ProjectAdvice> actualBuildHealth() {
+    return actualProjectAdvice(gradleProject)
+  }
+
+  final Set<ProjectAdvice> expectedBuildHealth = emptyProjectAdviceFor(':consumer', ':producer',)
+}