wip: tests for bsp linking

frontend/src/test/scala/bloop/bsp/BspBaseSuite.scala

@@ -80,7 +80,7 @@ abstract class BspBaseSuite extends BaseSuite with BspClientTest {
     def simulateClientDroppingOut(): Unit = closeStreamsForcibly()
   }
 
-  final class ManagedBspTestState(
+  final case class ManagedBspTestState(
       state: State,
       lastBspStatus: bsp.StatusCode,
       currentCompileIteration: AtomicInt,

frontend/src/test/scala/bloop/bsp/BspLinkSpec.scala

@@ -0,0 +1,47 @@
+package bloop.bsp
+
+import bloop.cli.BspProtocol
+import bloop.util.TestUtil
+import bloop.logging.RecordingLogger
+import bloop.cli.ExitStatus
+import bloop.util.TestProject
+import bloop.data.Project
+import bloop.data.Platform
+import bloop.engine.tasks.toolchains.ScalaJsToolchain
+import bloop.engine.State
+
+object TcpBspLinkSpec extends BspLinkSpec(BspProtocol.Tcp)
+object LocalBspLinkSpec extends BspLinkSpec(BspProtocol.Local)
+
+class BspLinkSpec(
+    override val protocol: BspProtocol
+) extends BspBaseSuite {
+
+  val state0: State = {
+    def setUpScalajs(p: Project): Project = {
+      val platform = p.platform match {
+        case jsPlatform: Platform.Js =>
+          jsPlatform.copy(toolchain = Some(ScalaJsToolchain.apply(this.getClass.getClassLoader)))
+        case _ => p.platform
+      }
+      p.copy(platform = platform)
+    }
+
+    val configDir = TestUtil.getBloopConfigDir("cross-test-build-scalajs-1.x")
+    val logger = bloop.logging.BloopLogger.default(configDir.toString())
+    TestUtil.loadTestProject(configDir, logger, true, _.map(setUpScalajs))
+  }
+
+  test("can link scalajs cross project") {
+    TestUtil.withinWorkspace { workspace =>
+      val logger = new RecordingLogger(ansiCodesSupported = false)
+      loadBspBuildFromResources(s"cross-test-build-scalajs-1.x", workspace, logger) { build =>
+        val project: TestProject = build.projectFor("test-projectJS")
+        val newB = build.copy(state = build.state.copy(state = state0))
+        val compiledState =
+          newB.state.compile(project, arguments = Some(List("--link")))
+        assert(compiledState.status == ExitStatus.Ok)
+      }
+    }
+  }
+}