[bidi][java] Add set viewport command

Author: pujagani

java/src/org/openqa/selenium/bidi/browsingcontext/BrowsingContext.java

@@ -288,6 +288,33 @@ public String captureElementScreenshot(String elementId, boolean scrollIntoView)
             }));
   }
 
+  public void setViewport(double width, double height) {
+    Require.positive("Viewport width", width);
+    Require.positive("Viewport height", height);
+
+    this.bidi.send(
+        new Command<>(
+            "browsingContext.setViewport",
+            Map.of(CONTEXT, id, "viewport", Map.of("width", width, "height", height))));
+  }
+
+  public void setViewport(double width, double height, double devicePixelRatio) {
+    Require.positive("Viewport width", width);
+    Require.positive("Viewport height", height);
+    Require.positive("Device pixel ratio.", devicePixelRatio);
+
+    this.bidi.send(
+        new Command<>(
+            "browsingContext.setViewport",
+            Map.of(
+                CONTEXT,
+                id,
+                "viewport",
+                Map.of("width", width, "height", height),
+                "devicePixelRatio",
+                devicePixelRatio)));
+  }
+
   public void close() {
     // This might need more clean up actions once the behavior is defined.
     // Specially when last tab or window is closed.

java/test/org/openqa/selenium/bidi/browsingcontext/BrowsingContextTest.java

@@ -33,6 +33,7 @@
 import org.junit.jupiter.api.Test;
 import org.openqa.selenium.By;
 import org.openqa.selenium.Dimension;
+import org.openqa.selenium.JavascriptExecutor;
 import org.openqa.selenium.Rectangle;
 import org.openqa.selenium.WebElement;
 import org.openqa.selenium.WindowType;
@@ -418,6 +419,49 @@ void canScrollAndCaptureElementScreenshot() {
     assertThat(screenshot.length()).isPositive();
   }
 
+  @Test
+  @NotYetImplemented(SAFARI)
+  @NotYetImplemented(IE)
+  void canSetViewport() {
+    BrowsingContext browsingContext = new BrowsingContext(driver, driver.getWindowHandle());
+    driver.get(appServer.whereIs("formPage.html"));
+
+    browsingContext.setViewport(250, 300);
+
+    List<Long> newViewportSize =
+        (List<Long>)
+            ((JavascriptExecutor) driver)
+                .executeScript("return [window.innerWidth, window.innerHeight];");
+
+    assertThat(newViewportSize.get(0)).isEqualTo(250);
+    assertThat(newViewportSize.get(1)).isEqualTo(300);
+  }
+
+  @Test
+  @NotYetImplemented(SAFARI)
+  @NotYetImplemented(IE)
+  @NotYetImplemented(CHROME)
+  @NotYetImplemented(FIREFOX)
+  void canSetViewportWithDevicePixelRatio() {
+    BrowsingContext browsingContext = new BrowsingContext(driver, driver.getWindowHandle());
+    driver.get(appServer.whereIs("formPage.html"));
+
+    browsingContext.setViewport(250, 300, 5);
+
+    List<Long> newViewportSize =
+        (List<Long>)
+            ((JavascriptExecutor) driver)
+                .executeScript("return [window.innerWidth, window.innerHeight];");
+
+    assertThat(newViewportSize.get(0)).isEqualTo(250);
+    assertThat(newViewportSize.get(1)).isEqualTo(300);
+
+    Long newDevicePixelRatio =
+        (Long) ((JavascriptExecutor) driver).executeScript("return window.devicePixelRatio");
+
+    assertThat(newDevicePixelRatio).isEqualTo(5);
+  }
+
   private String alertPage() {
     return appServer.create(
         new Page()