Technical Challenge

Implement a feature that shows current time and weather temperature of 5 largest cities in the world.

• Use the provided code structure
• Only use dependencies that are already specified in package.json
• Create a GitHub issue and a pull request that resolves the issue
• Find and use weather API of your choice
• If the requirements are not clear, use your best judgement

Code Structure

• Acceptance tests are located at:
  • e2e/features/*.feature: Cucumber tests in Gherkin
  • e2e/steps/[feature].steps.js: Feature step definitions
• Application code is under src/:
  • index.ts: Load the app
  • components/: React components
    • [Component]/
      • index.tsx: Component code
      • index.test.tsx: Component tests (snapshot verification)
      • __snapshots__/: Generated snapshots for tests
    • index.tsx/index.test.tsx/__snapshots__/: Root layout component
  • app/:
    • index.tsx: Setup react context providers
    • store.ts: Redux store initialization
    • actions.ts: Redux action creators
    • reducers/
      • index.ts: Combine and export Redux reducers
      • [reducer]/
        • index.ts: Reducer function
        • index.test.ts: Reducer function tests
    • epics/
      • index.ts: Combine and export redux-observable epics
      • types.ts: Types used by epics
      • test-helpers.ts: Helper functions for testing epics
      • [epic]/
        • index.ts: Epic
        • index.test.ts: Epic observable tests
    • services/
      • index.ts: Combine and export services
      • [service]/
        • index.ts: Service code
        • index.test.ts: Service tests

Tests

Tests are not required to pass the challenge. You can write no tests, some tests, or go full BDD - up to you.

• Acceptance tests using puppeteer, jest and jest-cucumber
• React component snapshot tests using jest, enzyme and enzyme-to-json
• jest unit tests for redux reducers, redux-observable epics and services

Note: to mock 3rd party services in e2e tests you can use TEST_BUILD variable that is exported by webpack.