fix: copy source maps for frontend resources (#12701) (#12714)

Co-authored-by: Sergey Vinogradov <mr.vursen@gmail.com>

flow-server/src/main/java/com/vaadin/flow/server/frontend/TaskCopyFrontendFiles.java

@@ -36,7 +36,8 @@
  */
 public class TaskCopyFrontendFiles implements FallibleCommand {
     private static final String[] WILDCARD_INCLUSIONS = new String[] {
-            "**/*.js", "**/*.css", "**/*.ts" };
+            "**/*.js", "**/*.js.map", "**/*.css", "**/*.css.map", "**/*.ts",
+            "**/*.ts.map" };
     private static final String WILDCARD_INCLUSION_APP_THEME_JAR = "**/themes/**/*";
     private File targetDirectory;
     private Set<File> resourceLocations = null;

flow-server/src/test/java/com/vaadin/flow/server/frontend/FrontendResourcesAreCopiedAfterCleaningTest.java

@@ -58,14 +58,14 @@ public void setup() throws IOException, ExecutionFailedException {
     public void frontendResources_should_beCopiedFromJars_when_TaskUpdatePackagesRemovesThem()
             throws IOException, ExecutionFailedException {
         copyResources();
-        assertCopiedFrontendFileAmount(3);
+        assertCopiedFrontendFileAmount(6/* jar files */ + 1/* package.json */);
 
         performPackageClean();
         // Should keep the `package.json` file
         assertCopiedFrontendFileAmount(1);
 
         copyResources();
-        assertCopiedFrontendFileAmount(3);
+        assertCopiedFrontendFileAmount(6/* jar files */ + 1/* package.json */);
     }
 
     private void assertCopiedFrontendFileAmount(int fileCount)

flow-server/src/test/java/com/vaadin/flow/server/frontend/TaskCopyFrontendFilesTest.java

@@ -88,10 +88,15 @@ private void should_collectJsAndCssFilesFromJars(String jarFile,
 
         // contains:
         // - ExampleConnector.js
+        // - ExampleConnector.js.map
         // - inline.css
+        // - inline.css.map
+        // - example.ts
+        // - example.ts.map
         File jar = TestUtils.getTestJar(jarFile);
         // Contains:
         // - resourceInFolder.js
+        // - resourceInFolder.js.map
         File dir = TestUtils.getTestFolder(fsDir);
 
         TaskCopyFrontendFiles task = new TaskCopyFrontendFiles(
@@ -100,17 +105,36 @@ private void should_collectJsAndCssFilesFromJars(String jarFile,
         task.execute();
 
         List<String> files = TestUtils.listFilesRecursively(frontendDepsFolder);
-        Assert.assertEquals(3, files.size());
+        Assert.assertEquals(8, files.size());
 
-        Assert.assertTrue("Js resource should have been copied from jar file",
+        Assert.assertTrue("TS resource should have been copied from jar file",
+                files.contains("example.ts"));
+
+        Assert.assertTrue(
+                "TS resource source map should have been copied from jar file",
+                files.contains("example.ts.map"));
+
+        Assert.assertTrue("JS resource should have been copied from jar file",
                 files.contains("ExampleConnector.js"));
 
-        Assert.assertTrue("Css resource should have been copied from jar file",
+        Assert.assertTrue(
+                "JS resource source map should have been copied from jar file",
+                files.contains("ExampleConnector.js.map"));
+
+        Assert.assertTrue("CSS resource should have been copied from jar file",
                 files.contains("inline.css"));
 
         Assert.assertTrue(
-                "Js resource should have been copied from resource folder",
+                "CSS resource source map should have been copied from jar file",
+                files.contains("inline.css.map"));
+
+        Assert.assertTrue(
+                "JS resource should have been copied from resource folder",
                 files.contains("resourceInFolder.js"));
+
+        Assert.assertTrue(
+                "JS resource source map should have been copied from resource folder",
+                files.contains("resourceInFolder.js.map"));
     }
 
     private static Set<File> jars(File... files) {