Retry E2E tests in CI

Author: Half-Shot

jest.config.ts

@@ -9,6 +9,7 @@ const config: Config = {
   // The root directory that Jest should scan for tests and modules within
   rootDir: "spec-lib",
   testTimeout: 60000,
+  setupFiles: ["<rootDir>/spec/setup-jest.js"],
 };
 
 export default config;

spec/setup-jest.ts

@@ -0,0 +1,2 @@
+// In CI, the network creation for the homerunner containers can race (https://github.com/matrix-org/complement/issues/720).
+jest.retryTimes(process.env.CI ? 3 : 1);