JS backend: add cli test for creating metadata and ant test for library with metadata

compiler/tests/org/jetbrains/kotlin/cli/KotlincExecutableTestGenerated.java

@@ -183,6 +183,12 @@ public class KotlincExecutableTestGenerated extends AbstractKotlincExecutableTes
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/cli/js"), Pattern.compile("^(.+)\\.args$"), false);
         }
 
+        @TestMetadata("createMetadata.args")
+        public void testCreateMetadata() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/cli/js/createMetadata.args");
+            doJsTest(fileName);
+        }
+
         @TestMetadata("diagnosticForClassLiteral.args")
         public void testDiagnosticForClassLiteral() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/cli/js/diagnosticForClassLiteral.args");

compiler/tests/org/jetbrains/kotlin/cli/js/K2JsCliTest.java

@@ -70,6 +70,14 @@ public class K2JsCliTest extends CliBaseTest {
         Assert.assertTrue(new File(tmpdir.getTmpDir(), "out.js").isFile());
     }
 
+    @Test
+    public void createMetadata() throws Exception {
+        executeCompilerCompareOutputJS();
+
+        Assert.assertTrue(new File(tmpdir.getTmpDir(), "jslib-example.meta.js").isFile());
+        Assert.assertTrue(new File(tmpdir.getTmpDir(), "jslib-example.js").isFile());
+    }
+
     @Test
     public void libraryDirNotFound() throws Exception {
         executeCompilerCompareOutputJS();