test: add basic tests

cases

__tests__/cases/baseline.ts

@@ -0,0 +1,48 @@
+/**
+ * Make sure some basic behaviors of puppeteer assertions
+ */
+
+import { expectToFind, expectToNotFind } from '../utils'
+
+describe(`in random page`, () => {
+  beforeAll(() => page.goto('https://google.com'))
+
+  it('wait for hidden non-exist element should resolve null', async () => {
+    expect(
+      await page.waitForSelector('.non-exist-element', { hidden: true, timeout: 1000 }),
+    ).toBeNull()
+  })
+
+  it('wait for exist element', async () => {
+    expectToFind('*')
+  })
+
+  it('wait for exist element', async () => {
+    expectToNotFind('.non-exist-element')
+  })
+
+  it('wait for non-exist element reject should throw', async () => {
+    await expect(page.waitForSelector('.non-exist-element', { timeout: 1000 })).rejects.toThrow()
+  })
+
+  // Cases below are expected to fail to show how async test works
+
+  // // This is expected to fail!
+  // it('wait for non-exist element reject should not throw', async () => {
+  //   await expect(
+  //     page.waitForSelector('.non-exist-element', { timeout: 1000 }),
+  //   ).rejects.not.toThrow()
+  // })
+
+  // // This is expected to fail!
+  // it('wait for non-exist element should resolve throw', async () => {
+  //   await expect(page.waitForSelector('.non-exist-element', { timeout: 1000 })).resolves.toThrow()
+  // })
+
+  // // This is expected to fail!
+  // it('wait for non-exist element should resolve not throw', async () => {
+  //   await expect(
+  //     page.waitForSelector('.non-exist-element', { timeout: 1000 }),
+  //   ).resolves.not.toThrow()
+  // })
+})

__tests__/cases/homepage.not-render.ts

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+import { expectToNotFind } from '../utils'
+
+describe(`in GitHub homepage`, () => {
+  beforeAll(() => page.goto('https://github.com'))
+
+  it('should not render Gitako', async () => {
+    expectToNotFind('.gitako-side-bar .gitako-position-wrapper')
+  })
+})

__tests__/cases/project-page.gitako.ts

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+import { expectToFind } from '../utils'
+
+describe(`in Gitako project page`, () => {
+  beforeAll(() => page.goto('https://github.com/EnixCoda/Gitako'))
+
+  it('should render Gitako', async () => {
+    expectToFind('.gitako-side-bar .gitako-position-wrapper')
+  })
+})

__tests__/utils.ts

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+export async function expectToFind(selector: string) {
+  await expect(await page.waitForSelector(selector)).not.toBeNull()
+}
+
+export async function expectToNotFind(selector: string) {
+  await expect(page.waitForSelector(selector, { timeout: 1000 })).rejects.toThrow()
+}