1 files changed, 31 insertions, 0 deletions
diff --git a/integration/test/src/AcyclicTests.scala b/integration/test/src/AcyclicTests.scala
new file mode 100644
index 00000000..145c106d
--- /dev/null
+++ b/integration/test/src/AcyclicTests.scala
@@ -0,0 +1,31 @@
+package mill.integration
+
+import utest._
+
+class AcyclicTests(fork: Boolean)
+  extends IntegrationTestSuite("MILL_ACYCLIC_REPO", "acyclic", fork) {
+  val tests = Tests{
+    initWorkspace()
+
+    def check(scalaVersion: String) = {
+      val firstCompile = eval(s"acyclic[$scalaVersion].compile")
+
+      assert(
+        firstCompile,
+        os.walk(workspacePath).exists(_.last == "GraphAnalysis.class"),
+        os.walk(workspacePath).exists(_.last == "PluginPhase.class")
+      )
+      for(scalaFile <- os.walk(workspacePath).filter(_.ext == "scala")){
+        os.write.append(scalaFile, "\n}")
+      }
+
+      val brokenCompile = eval(s"acyclic[$scalaVersion].compile")
+
+      assert(!brokenCompile)
+    }
+
+    'scala2118 - mill.util.TestUtil.disableInJava9OrAbove(check("2.11.8"))
+    'scala2124 - check("2.12.4")
+
+  }
+}