Corrupt JSON Response

Corrupt a JSON response and assert that the app renders a parse-safe error instead of crashing.

Playwright

await injectChaos(page, {
  seed: 42,
  network: { corruptions: [{ urlPattern: '/api/profile', strategy: 'malformed-json', probability: 1 }] },
});
await page.goto('/profile');
await expect(page.locator('[data-testid="parse-error"]')).toBeVisible();
expect((await getChaosLog(page)).some((event) => event.type === 'network:corruption' && event.applied)).toBe(true);

Cypress

cy.injectChaos({
  seed: 42,
  network: { corruptions: [{ urlPattern: '/api/profile', strategy: 'malformed-json', probability: 1 }] },
});
cy.visit('/profile');
cy.get('[data-testid="parse-error"]').should('be.visible');
cy.getChaosLog().should((log) => {
  expect(log.some((event) => event.type === 'network:corruption' && event.applied)).to.equal(true);
});

WebdriverIO

await browser.url('/profile');
await injectChaos(browser, {
  seed: 42,
  network: { corruptions: [{ urlPattern: '/api/profile', strategy: 'malformed-json', probability: 1 }] },
});
await $('#reload-profile').click();
await expect($('[data-testid="parse-error"]')).toBeDisplayed();
expect((await getChaosLog(browser)).some((event) => event.type === 'network:corruption' && event.applied)).toBe(true);

Puppeteer

await injectChaos(page, {
  seed: 42,
  network: { corruptions: [{ urlPattern: '/api/profile', strategy: 'malformed-json', probability: 1 }] },
});
await page.goto('http://localhost:3000/profile');
await page.waitForSelector('[data-testid="parse-error"]');
const log = await getChaosLog(page);
if (!log.some((event) => event.type === 'network:corruption' && event.applied)) {
  throw new Error('Expected corrupt JSON chaos');
}