Run some extra tests for Java 8, 11, 17, 21 & 23

modules/integration/src/test/scala/scala/cli/integration/RunJdkTestDefinitions.scala

@@ -0,0 +1,50 @@
+package scala.cli.integration
+
+import com.eed3si9n.expecty.Expecty.expect
+
+import scala.util.Properties
+
+trait RunJdkTestDefinitions { _: RunTestDefinitions =>
+  val allJdkVersionsToTest: Seq[Int] = Seq(8, 11, 17, 21, 23)
+
+  def javaIndex(javaVersion: Int): String =
+    if (Properties.isMac && TestUtil.isM1 && javaVersion < 11) s"zulu:$javaVersion"
+    else javaVersion.toString
+
+  for { javaVersion <- allJdkVersionsToTest } {
+    test(s"correct JVM is picked up when JAVA_HOME set to $javaVersion") {
+      TestUtil.retryOnCi() {
+        TestInputs(
+          os.rel / "check_java_home.sc" ->
+            s"""assert(
+               |  System.getProperty("java.version").startsWith("$javaVersion") ||
+               |  System.getProperty("java.version").startsWith("1.$javaVersion")
+               |)
+               |println(System.getProperty("java.home"))""".stripMargin
+        ).fromRoot { root =>
+          val javaHome =
+            os.Path(
+              os.proc(TestUtil.cs, "java-home", "--jvm", javaIndex(javaVersion)).call().out.trim(),
+              os.pwd
+            )
+            val res = os.proc(TestUtil.cli, "run", ".", extraOptions)
+              .call(cwd = root, env = Map("JAVA_HOME" -> javaHome.toString))
+            expect(res.out.trim().contains(javaHome.toString))
+        }
+      }
+    }
+
+    test(s"hello world with --jvm $javaVersion") {
+      TestUtil.retryOnCi() {
+        val expectedMessage = "Hello, world!"
+        TestInputs(
+          os.rel / "hello_world.sc" -> s"println(\"$expectedMessage\")"
+        ).fromRoot { root =>
+          val res = os.proc(TestUtil.cli, "run", ".", extraOptions, "--jvm", javaVersion)
+            .call(cwd = root)
+          expect(res.out.trim() == expectedMessage)
+        }
+      }
+    }
+  }
+}

modules/integration/src/test/scala/scala/cli/integration/RunTestDefinitions.scala

@@ -21,7 +21,8 @@ abstract class RunTestDefinitions
     with RunScalacCompatTestDefinitions
     with RunSnippetTestDefinitions
     with RunScalaPyTestDefinitions
-    with RunZipTestDefinitions { _: TestScalaVersion =>
+    with RunZipTestDefinitions
+    with RunJdkTestDefinitions { _: TestScalaVersion =>
   protected lazy val extraOptions: Seq[String] = scalaVersionArgs ++ TestUtil.extraOptions
   protected val emptyInputs: TestInputs        = TestInputs(os.rel / ".placeholder" -> "")