feat: selectors (#63)

api-generator/src/main/java/com/microsoft/playwright/tools/ApiGenerator.java

@@ -376,6 +376,13 @@ class Method extends Element {
       .replace("String selector, ", "")
       .replace("(selector, ", "(")
       .replace("ElementHandle.", "")).toArray(String[]::new));
+
+    customSignature.put("Selectors.register", new String[] {
+      "default void register(String name, String script) { register(name, script, null); }",
+      "void register(String name, String script, RegisterOptions options);",
+      "default void register(String name, Path path) { register(name, path, null); }",
+      "void register(String name, Path path, RegisterOptions options);"
+    });
   }
 
   Method(TypeDefinition parent, JsonObject jsonElement) {
@@ -656,7 +663,7 @@ class Interface extends TypeDefinition {
     if ("Download".equals(jsonName)) {
       output.add("import java.io.InputStream;");
     }
-    if (asList("Page", "Frame", "ElementHandle", "FileChooser", "ChromiumBrowser", "Download", "Route").contains(jsonName)) {
+    if (asList("Page", "Frame", "ElementHandle", "FileChooser", "ChromiumBrowser", "Download", "Route", "Selectors").contains(jsonName)) {
       output.add("import java.nio.file.Path;");
     }
     output.add("import java.util.*;");

playwright/src/main/java/com/microsoft/playwright/Playwright.java

@@ -31,4 +31,6 @@ public interface Playwright {
   BrowserType webkit();
 
   Map<String, DeviceDescriptor> devices();
+
+  Selectors selectors();
 }

playwright/src/main/java/com/microsoft/playwright/Selectors.java

@@ -16,6 +16,7 @@
 
 package com.microsoft.playwright;
 
+import java.nio.file.Path;
 import java.util.*;
 
 public interface Selectors {
@@ -27,9 +28,9 @@ public interface Selectors {
       return this;
     }
   }
-  default void register(String name, String script) {
-    register(name, script, null);
-  }
+  default void register(String name, String script) { register(name, script, null); }
   void register(String name, String script, RegisterOptions options);
+  default void register(String name, Path path) { register(name, path, null); }
+  void register(String name, Path path, RegisterOptions options);
 }
 

playwright/src/main/java/com/microsoft/playwright/impl/Connection.java

@@ -228,7 +228,7 @@ public class Connection {
         result = new Stream(parent, type, guid, initializer);
         break;
       case "Selectors":
-//        result = new Playwright(parent, type, guid, initializer);
+        result = new SelectorsImpl(parent, type, guid, initializer);
         break;
       case "Worker":
         result = new WorkerImpl(parent, type, guid, initializer);

playwright/src/main/java/com/microsoft/playwright/impl/ElementHandleImpl.java

@@ -34,7 +34,7 @@ import java.util.List;
 import static com.microsoft.playwright.impl.Serialization.*;
 import static com.microsoft.playwright.impl.Utils.isFunctionBody;
 
-class ElementHandleImpl extends JSHandleImpl implements ElementHandle {
+public class ElementHandleImpl extends JSHandleImpl implements ElementHandle {
   ElementHandleImpl(ChannelOwner parent, String type, String guid, JsonObject initializer) {
     super(parent, type, guid, initializer);
   }
@@ -384,6 +384,16 @@ class ElementHandleImpl extends JSHandleImpl implements ElementHandle {
     return toDeferred(sendMessageAsync("waitForElementState", params).apply(json -> null));
   }
 
+  public String createSelectorForTest(String name) {
+    JsonObject params = new JsonObject();
+    params.addProperty("name", name);
+    JsonObject json = sendMessage("createSelectorForTest", params).getAsJsonObject();
+    if (json.has("value")) {
+      return json.get("value").getAsString();
+    }
+    return null;
+  }
+
   private static String toProtocol(WaitForSelectorOptions.State state) {
     if (state == null) {
       state = WaitForSelectorOptions.State.VISIBLE;

playwright/src/main/java/com/microsoft/playwright/impl/PlaywrightImpl.java

@@ -20,10 +20,7 @@ import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
-import com.microsoft.playwright.BrowserType;
-import com.microsoft.playwright.DeviceDescriptor;
-import com.microsoft.playwright.Playwright;
-import com.microsoft.playwright.PlaywrightException;
+import com.microsoft.playwright.*;
 
 import java.io.File;
 import java.io.IOException;
@@ -51,6 +48,7 @@ public class PlaywrightImpl extends ChannelOwner implements Playwright {
   private final BrowserTypeImpl chromium;
   private final BrowserTypeImpl firefox;
   private final BrowserTypeImpl webkit;
+  private final Selectors selectors;
   private final Map<String, DeviceDescriptor> devices = new HashMap<>();
 
   public PlaywrightImpl(ChannelOwner parent, String type, String guid, JsonObject initializer) {
@@ -58,6 +56,7 @@ public class PlaywrightImpl extends ChannelOwner implements Playwright {
     chromium = parent.connection.getExistingObject(initializer.getAsJsonObject("chromium").get("guid").getAsString());
     firefox = parent.connection.getExistingObject(initializer.getAsJsonObject("firefox").get("guid").getAsString());
     webkit = parent.connection.getExistingObject(initializer.getAsJsonObject("webkit").get("guid").getAsString());
+    selectors = parent.connection.getExistingObject(initializer.getAsJsonObject("selectors").get("guid").getAsString());
 
     Gson gson = Serialization.gson();
     for (JsonElement item : initializer.getAsJsonArray("deviceDescriptors")) {
@@ -87,4 +86,9 @@ public class PlaywrightImpl extends ChannelOwner implements Playwright {
   public Map<String, DeviceDescriptor> devices() {
     return devices;
   }
+
+  @Override
+  public Selectors selectors() {
+    return selectors;
+  }
 }

playwright/src/main/java/com/microsoft/playwright/impl/SelectorsImpl.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.microsoft.playwright.impl;
+
+import com.google.gson.JsonObject;
+import com.microsoft.playwright.PlaywrightException;
+import com.microsoft.playwright.Selectors;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static com.microsoft.playwright.impl.Serialization.gson;
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+class SelectorsImpl extends ChannelOwner implements Selectors {
+  SelectorsImpl(ChannelOwner parent, String type, String guid, JsonObject initializer) {
+    super(parent, type, guid, initializer);
+  }
+
+  @Override
+  public void register(String name, String script, RegisterOptions options) {
+    if (options == null) {
+      options = new RegisterOptions();
+    }
+    JsonObject params = gson().toJsonTree(options).getAsJsonObject();
+    params.addProperty("name", name);
+    params.addProperty("source", script);
+    sendMessage("register", params);
+  }
+
+  @Override
+  public void register(String name, Path path, RegisterOptions options) {
+    byte[] buffer;
+    try {
+      buffer = Files.readAllBytes(path);
+    } catch (IOException e) {
+      throw new PlaywrightException("Failed to read selector from file: " + path, e);
+    }
+    register(name, new String(buffer, UTF_8), options);
+  }
+}

playwright/src/test/java/com/microsoft/playwright/TestNetworkResponse.java

@@ -18,9 +18,10 @@ package com.microsoft.playwright;
 
 import org.junit.jupiter.api.Test;
 
-import java.io.*;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
 import java.nio.file.Files;
-import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.concurrent.Future;
 
@@ -111,7 +112,7 @@ public class TestNetworkResponse extends TestBase {
   @Test
   void shouldReturnBody() throws IOException {
     Response response = page.navigate(server.PREFIX + "/pptr.png");
-    byte[] expected = Files.readAllBytes(new File("src/test/resources/pptr.png").toPath());
+    byte[] expected = Files.readAllBytes(Paths.get("src/test/resources/pptr.png"));
     assertTrue(Arrays.equals(expected, response.body()));
   }
 
@@ -119,7 +120,7 @@ public class TestNetworkResponse extends TestBase {
   void shouldReturnBodyWithCompression() throws IOException {
     server.enableGzip("/pptr.png");
     Response response = page.navigate(server.PREFIX + "/pptr.png");
-    byte[] expected = Files.readAllBytes(new File("src/test/resources/pptr.png").toPath());
+    byte[] expected = Files.readAllBytes(Paths.get("src/test/resources/pptr.png"));
     assertTrue(Arrays.equals(expected, response.body()));
   }
 

playwright/src/test/java/com/microsoft/playwright/TestRequestFulfill.java

@@ -61,7 +61,7 @@ public class TestRequestFulfill extends TestBase {
     page.route("**/*", route -> {
       byte[] imageBuffer;
       try {
-        imageBuffer = Files.readAllBytes(new File("src/test/resources/pptr.png").toPath());
+        imageBuffer = Files.readAllBytes(Paths.get("src/test/resources/pptr.png"));
       } catch (IOException e) {
         e.printStackTrace();
         throw new RuntimeException(e);

playwright/src/test/java/com/microsoft/playwright/TestSelectorsRegister.java

@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.microsoft.playwright;
+
+import com.microsoft.playwright.impl.ElementHandleImpl;
+import org.junit.jupiter.api.Test;
+
+import java.nio.file.Paths;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class TestSelectorsRegister extends TestBase {
+  @Test
+  void shouldWork() {
+    String selectorScript = "{\n" +
+      "  create(root, target) {\n" +
+      "    return target.nodeName;\n" +
+      "  },\n" +
+      "  query(root, selector) {\n" +
+      "    return root.querySelector(selector);\n" +
+      "  },\n" +
+      "  queryAll(root, selector) {\n" +
+      "    return Array.from(root.querySelectorAll(selector));\n" +
+      "  }\n" +
+      "}";
+    // Register one engine before creating context.
+    playwright.selectors().register("tag", selectorScript);
+
+    BrowserContext context = browser.newContext();
+    // Register another engine after creating context.
+    playwright.selectors().register("tag2", selectorScript);
+
+    Page page = context.newPage();
+    page.setContent("<div><span></span></div><div></div>");
+
+    assertEquals("DIV", ((ElementHandleImpl) page.querySelector("div")).createSelectorForTest("tag"));
+    assertEquals("DIV", page.evalOnSelector("tag=DIV", "e => e.nodeName"));
+    assertEquals("SPAN", page.evalOnSelector("tag=SPAN", "e => e.nodeName"));
+    assertEquals(2, page.evalOnSelectorAll("tag=DIV", "es => es.length"));
+
+    assertEquals("DIV", ((ElementHandleImpl) page.querySelector("div")).createSelectorForTest("tag2"));
+    assertEquals("DIV", page.evalOnSelector("tag2=DIV", "e => e.nodeName"));
+    assertEquals("SPAN", page.evalOnSelector("tag2=SPAN", "e => e.nodeName"));
+    assertEquals(2, page.evalOnSelectorAll("tag2=DIV", "es => es.length"));
+    try {
+      // Selector names are case-sensitive.
+      page.querySelector("tAG=DIV");
+      fail("did not throw");
+    } catch (PlaywrightException e) {
+      assertTrue(e.getMessage().contains("Unknown engine \"tAG\" while parsing selector tAG=DIV"));
+    }
+    context.close();
+  }
+
+  @Test
+  void shouldWorkWithPath() {
+    playwright.selectors().register("foo", Paths.get("src/test/resources/sectionselectorengine.js"));
+    page.setContent("<section></section>");
+    assertEquals("SECTION", page.evalOnSelector("foo=whatever", "e => e.nodeName"));
+  }
+
+  @Test
+  void shouldWorkInMainAndIsolatedWorld() {
+    String createDummySelector = "{\n" +
+      "  create(root, target) { },\n" +
+      "  query(root, selector) {\n" +
+      "    return window['__answer'];\n" +
+      "  },\n" +
+      "  queryAll(root, selector) {\n" +
+      "    return [document.body, document.documentElement, window['__answer']];\n" +
+      "  }\n" +
+      "}";
+    playwright.selectors().register("main", createDummySelector);
+    playwright.selectors().register("isolated", createDummySelector, new Selectors.RegisterOptions().withContentScript(true));
+    page.setContent("<div><span><section></section></span></div>");
+    page.evaluate("() => window['__answer'] = document.querySelector('span')");
+    // Works in main if asked.
+    assertEquals("SPAN", page.evalOnSelector("main=ignored", "e => e.nodeName"));
+    assertEquals("SPAN", page.evalOnSelector("css=div >> main=ignored", "e => e.nodeName"));
+    assertEquals(true, page.evalOnSelectorAll("main=ignored", "es => window['__answer'] !== undefined"));
+    assertEquals(3, page.evalOnSelectorAll("main=ignored", "es => es.filter(e => e).length"));
+    // Works in isolated by default.
+    assertNull(page.querySelector("isolated=ignored"));
+    assertNull(page.querySelector("css=div >> isolated=ignored"));
+    // $$eval always works in main, to avoid adopting nodes one by one.
+    assertEquals(true, page.evalOnSelectorAll("isolated=ignored", "es => window['__answer'] !== undefined"));
+    assertEquals(3, page.evalOnSelectorAll("isolated=ignored", "es => es.filter(e => e).length"));
+    // At least one engine in main forces all to be in main.
+    assertEquals("SPAN", page.evalOnSelector("main=ignored >> isolated=ignored", "e => e.nodeName"));
+    assertEquals("SPAN", page.evalOnSelector("isolated=ignored >> main=ignored", "e => e.nodeName"));
+    // Can be chained to css.
+    assertEquals("SECTION", page.evalOnSelector("main=ignored >> css=section", "e => e.nodeName"));
+  }
+
+  @Test
+  void shouldHandleErrors() {
+    try {
+      page.querySelector("neverregister=ignored");
+      fail("did not throw");
+    } catch (PlaywrightException e) {
+      assertTrue(e.getMessage().contains("Unknown engine \"neverregister\" while parsing selector neverregister=ignored"));
+    }
+    String createDummySelector = "{\n" +
+      "  create(root, target) {\n" +
+      "    return target.nodeName;\n" +
+      "  },\n" +
+      "  query(root, selector) {\n" +
+      "    return root.querySelector(\"dummy\");\n" +
+      "  },\n" +
+      "  queryAll(root, selector) {\n" +
+      "    return Array.from(root.querySelectorAll(\"dummy\"));\n" +
+      "  }\n" +
+      "}";
+    try {
+      playwright.selectors().register("$", createDummySelector);
+      fail("did not throw");
+    } catch (PlaywrightException e) {
+      assertTrue(e.getMessage().contains("Selector engine name may only contain [a-zA-Z0-9_] characters"));
+    }
+    // Selector names are case-sensitive.
+    playwright.selectors().register("dummy", createDummySelector);
+    playwright.selectors().register("duMMy", createDummySelector);
+    try {
+      playwright.selectors().register("dummy", createDummySelector);
+      fail("did not throw");
+    } catch (PlaywrightException e) {
+      assertTrue(e.getMessage().contains("\"dummy\" selector engine has been already registered"));
+    }
+    try {
+      playwright.selectors().register("css", createDummySelector);
+      fail("did not throw");
+    } catch (PlaywrightException e) {
+      assertTrue(e.getMessage().contains("\"css\" is a predefined selector engine"));
+    }
+  }
+}