feat: add command to fetch render tree by widget type (#119)

Author: Alpaca00

README.md

@@ -51,7 +51,7 @@ Get the latest version from `https://pub.dev/packages/appium_flutter_server/inst
 
    ```yaml
    dev_dependencies:
-     appium_flutter_server: 0.0.27
+     appium_flutter_server: 0.0.28
    ```
 
 2. Create a directory called `integration_test` in the root of your Flutter project.

package.json

@@ -5,7 +5,7 @@
       "appium",
       "flutter"
    ],
-   "version": "1.1.4",
+   "version": "1.1.5",
    "author": "",
    "license": "MIT License",
    "repository": {

src/driver.ts

@@ -137,6 +137,13 @@ export class AppiumFlutterDriver extends BaseDriver<FlutterDriverConstraints> {
             required: ['imageId'],
          },
       },
+      'flutter: renderTree': {
+         command: 'renderTree',
+         params: {
+            required: [],
+            optional: ['widgetType', 'text', 'key'],
+         },
+      },
    };
 
    async doubleClick(origin: any, offset: any, locator: any) {
@@ -430,4 +437,21 @@ export class AppiumFlutterDriver extends BaseDriver<FlutterDriverConstraints> {
       });
       return activateAppResponse;
    }
+
+   async renderTree(widgetType?: string, text?: string, key?: string) {
+      const body: Record<string, string> = {};
+
+      if (widgetType !== undefined) {
+         body['widgetType'] = widgetType;
+      }
+      if (text !== undefined) {
+         body['text'] = text;
+      }
+      if (key !== undefined) {
+         body['key'] = key;
+      }
+
+      const url = `/session/${this.sessionId}/element/render_tree`;
+      return this.proxy?.command(url, 'POST', body);
+   }
 }