NOTICKET: Improve end to end tests using retries for a more reliable …

…run in ci pipelines and ensuring labels exists before extracting attributes (#98)

demo-app/e2e/config.json

@@ -1,4 +1,5 @@
 {
+  "setupFilesAfterEnv": ["<rootDir>/e2e/jest.setup.js"],
   "globalSetup": "detox/runners/jest/globalSetup",
   "globalTeardown": "detox/runners/jest/globalTeardown",
   "maxWorkers": 1,

demo-app/e2e/jest.setup.js

@@ -0,0 +1,8 @@
+// Attempt to re-run individual tests when they fail
+const retries = 5;
+console.log('==========================');
+console.log(
+  `Running Jest with retries: will retry failing tests ${retries} time(s).`
+);
+console.log('==========================');
+jest.retryTimes(retries);

demo-app/e2e/page-objects/LabelPO.js

@@ -1,9 +1,13 @@
 /* eslint-disable @typescript-eslint/no-var-requires */
 const { UIComponentPO } = require('./UIComponentPO');
+const { waitFor } = require('detox');
+const { TIMEOUT_IN_MS } = require('./Options');
+
 /* eslint-enable @typescript-eslint/no-var-requires */
 
 class LabelPO extends UIComponentPO {
   async text() {
+    await waitFor(this.component()).toExist().withTimeout(TIMEOUT_IN_MS);
     const attributes = await this.getAttributes();
     return attributes.text;
   }