tests: verify that /test is handled correctly

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

__tests__/index.test.js

@@ -1,6 +1,10 @@
 const index = require('../GitGitGadget/index')
+const crypto = require('crypto')
+const stream = require('stream')
+const https = require('https')
 
 process.env['GITHUB_WEBHOOK_SECRET'] = 'for-testing'
+process.env['GITGITGADGET_TRIGGER_TOKEN'] = 'token-for-testing'
 
 test('reject requests other than webhook payloads', async () => {
     const context = {
@@ -45,3 +49,94 @@ test('reject requests other than webhook payloads', async () => {
     context.req.rawBody = '# empty'
     await expectInvalidWebhook('Incorrect X-Hub-Signature')
 })
+
+jest.mock('https')
+
+const mockRequest = {
+    write: jest.fn(),
+    end: jest.fn()
+}
+https.request = jest.fn().mockImplementation((options, cb) => {
+    const s = new stream()
+    s.setEncoding = jest.fn()
+    cb(s)
+    s.emit('data', '{}')
+    s.emit('end')
+    return mockRequest
+})
+
+const makeContext = (body, headers) => {
+    const rawBody = JSON.stringify(body)
+    const sha256 = crypto.createHmac('sha256', process.env['GITHUB_WEBHOOK_SECRET']).update(rawBody).digest('hex')
+    return {
+        log: jest.fn(),
+        req: {
+            body,
+            headers: {
+                'content-type': 'application/json',
+                'x-hub-signature-256': `sha256=${sha256}`,
+                ...headers || {}
+            },
+            method: 'POST',
+            rawBody
+        },
+        done: jest.fn()
+    }
+}
+
+const testIssueComment = (comment, fn) => {
+    const repoOwner = 'gitgitgadget'
+    const number = 0x70756c6c
+    const context = makeContext({
+        action: 'created',
+        comment: {
+            body: comment,
+            html_url: `https://github.com/${repoOwner}/git/pull/${number}`,
+            id: 0x636f6d6d656e74,
+            user: {
+                login: 'alice wonderland'
+            }
+        },
+        installation: {
+            id: 123
+        },
+        issue: {
+            number
+        },
+        repository: {
+            name: 'git',
+            owner: {
+                login: repoOwner
+            }
+        }
+    }, {
+        'x-github-event': 'issue_comment'
+    })
+
+    test(`test ${comment}`, async () => {
+        try {
+            expect(await index(context, context.req)).toBeUndefined()
+            await fn(context)
+            expect(context.done).toHaveBeenCalledTimes(1)
+        } catch (e) {
+            context.log.mock.calls.forEach(e => console.log(e[0]))
+            throw e;
+        }
+    })
+}
+
+testIssueComment('/test', async (context) => {
+    expect(context.done).toHaveBeenCalledTimes(1)
+    expect(context.res).toEqual({
+        body: 'Okay!'
+    })
+    expect(mockRequest.write).toHaveBeenCalledTimes(1)
+    expect(JSON.parse(mockRequest.write.mock.calls[0][0])).toEqual({
+        definition: {
+            id: 3
+        },
+        sourceBranch: 'refs/pull/1886743660/head',
+        parameters: '{"pr.comment.id":27988538471837300}'
+    })
+    expect(mockRequest.end).toHaveBeenCalledTimes(1)
+})