Add deep links tool window integration test

.gemini/styleguide.md

@@ -30,9 +30,8 @@ enforce standard modern Java/Kotlin coding conventions, but strictly police the
       as recommended by the modern SDK.
 - **Backward Compatibility:** Avoid using `@ApiStatus.Internal` or `@ApiStatus.ScheduledForRemoval` APIs unless strictly necessary.
 - **Logging:**
-    - Reject any use of `System.out.println` or `System.err.println` for logging.
-    - Enforce the use of the IntelliJ SDK's built-in logger: `com.intellij.openapi.diagnostic.Logger` or our own: `
-      io.flutter.logging.PluginLogger.
+    - Reject any use of `System.out.println` or `System.err.println` for logging in `src/` code (integration tests may use them for milestone logging).
+    - Enforce the use of the IntelliJ SDK's built-in logger (`com.intellij.openapi.diagnostic.Logger`) or our own (`io.flutter.logging.PluginLogger`).
 - **Actions:**
     - Classes extending `AnAction` must be completely stateless. Flag any `AnAction` class that defines mutable instance variables (fields),
       as the platform instantiates a single instance of the action for the lifetime of the IDE.

testSrc/integration/io/flutter/integrationTest/DeepLinksToolWindowTest.kt

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2025 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+package io.flutter.integrationTest
+
+import com.intellij.driver.sdk.invokeAction
+import com.intellij.driver.sdk.ui.components.UiComponent.Companion.waitFound
+import com.intellij.driver.sdk.ui.components.common.ideFrame
+import com.intellij.driver.sdk.ui.components.common.toolWindow
+import com.intellij.driver.sdk.ui.components.common.toolwindows.projectView
+import com.intellij.driver.sdk.waitForIndicators
+import com.intellij.ide.starter.driver.engine.BackgroundRun
+import com.intellij.ide.starter.driver.engine.runIdeWithDriver
+import com.intellij.ide.starter.junit5.config.UseLatestDownloadedIdeBuild
+import com.intellij.ide.starter.project.LocalProjectInfo
+import org.junit.jupiter.api.AfterAll
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.BeforeAll
+import org.junit.jupiter.api.Tag
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import org.junit.jupiter.api.extension.ExtendWith
+import java.nio.file.Paths
+import kotlin.time.Duration.Companion.minutes
+
+@Tag("ui")
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+@ExtendWith(UseLatestDownloadedIdeBuild::class)
+class DeepLinksToolWindowTest {
+
+  private val testProjectName = "my_deep_links_test_project_${System.currentTimeMillis()}"
+  private lateinit var run: BackgroundRun
+
+  @BeforeAll
+  fun createProject() {
+    val flutterSdk = System.getenv("FLUTTER_SDK")
+      ?: throw IllegalStateException("FLUTTER_SDK environment variable not set")
+    val flutterExe = Paths.get(flutterSdk, "bin", "flutter").toString()
+    val tmpDir = System.getProperty("java.io.tmpdir")
+
+    println("Creating project $testProjectName in $tmpDir")
+    val process = ProcessBuilder(flutterExe, "create", "--project-name", "deep_links_test", testProjectName)
+      .directory(java.io.File(tmpDir))
+      .redirectErrorStream(true)
+      .start()
+
+    val exitCode = process.waitFor()
+    if (exitCode != 0) {
+      val output = process.inputStream.bufferedReader().readText()
+      throw IllegalStateException("flutter create failed: $output")
+    }
+  }
+
+  @AfterEach
+  fun closeIde() {
+    if (::run.isInitialized) {
+      println("Closing IDE")
+      run.closeIdeAndWait()
+    } else {
+      println("IDE was not started, skipping close")
+    }
+  }
+
+  @AfterAll
+  fun cleanUpTestFolder() {
+    // Clean up the project folder
+    if (testProjectName.isNotEmpty()) {
+      val projectPath = Paths.get(System.getProperty("java.io.tmpdir"), testProjectName)
+      val projectFile = projectPath.toFile()
+      if (projectFile.exists()) {
+        projectFile.deleteRecursively()
+        println("Successfully deleted test folder: $projectPath")
+      } else {
+        println("Test folder does not exist, skipping cleanup: $projectPath")
+      }
+    }
+  }
+
+  @Test
+  fun testDeepLinksToolWindow() {
+    println("Initializing IDE test context")
+    val projectPath = Paths.get(System.getProperty("java.io.tmpdir"), testProjectName)
+    run = Setup.setupTestContextIC("DeepLinksToolWindowTest", LocalProjectInfo(projectPath)).runIdeWithDriver()
+
+    run.driver.withContext {
+      ideFrame {
+        waitFound()
+        driver.waitForIndicators(5.minutes)
+        println("IDE is ready, accessing editor.")
+
+        // Make sure indexing is finished and project is healthy
+        projectView {
+          projectViewTree.pathExists("deep_links_test", "pubspec.yaml")
+        }
+
+        // Open the Deep Links Tool Window
+        driver.invokeAction("ActivateFlutterDeepLinksToolWindow")
+
+        // Wait for the tool window to be focused or exist
+        toolWindow(io.flutter.deeplinks.DeepLinksViewFactory.TOOL_WINDOW_ID) {
+          waitFound(1.minutes)
+
+          // Verify a JCEF or JxBrowser component exists. We use 'Browser' in class name robustly.
+          x("//div[contains(@class, 'Browser')]").waitFound(1.minutes)
+        }
+      }
+    }
+  }
+}