I've encountered a similar issue as the one discussed in #5164 and also in this thread. Here is a sample of working test code:
// AccountResolver.test.ts
describe('Account entity', () => {
it('add account', async () => {
await createConnections()
const defaultConnection = getConnection('default')
const actual = await callGraphql(
`mutation {
addAccount(options: {
accountIdentifier: "7csdcd8-8a5f-49c3-ab9a-0198d42dd253"
name: "Jake, Bob (Braine-l’Alleud) JAM"
userName: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7c3e131e52311d0e1019053c1f131208130f13521f1311">[email protected]</a>"
}) {
accountIdentifier
name
userName
}
}`
)
expect(actual.data).toMatchObject({
data: {
addAccount: {
accountIdentifier: '7csdcd8-8a5f-49c3-ab9a-0198d42dd253',
name: 'Jake, Bob (Braine-l’Alleud) JAM',
userName: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f5b79a97dbb8948799908cb5969a9b819a869adb969a98">[email protected]</a>',
},
},
})
await defaultConnection.query(`DELETE FROM Account`)
await defaultConnection.close()
})
})
The code snippet for establishing a connection and closing it should be executed before and after all tests, which is why it has been included in globalSetup.ts and globalTeardown.ts:
// globalSetup.ts
require('ts-node/register')
import { createConnections } from 'typeorm'
module.exports = async () => {
await createConnections()
}
// globalTeardown.ts
require('ts-node/register')
import { getConnection } from 'typeorm'
module.exports = async () => {
const defaultConnection = getConnection('default')
await defaultConnection.close()
}
// AccountResolver.test.ts
describe('Account entity', () => {
it('add account', async () => {
const defaultConnection = getConnection('default')
await defaultConnection.query(`DELETE FROM Account`)
const actual = await callGraphql(
`mutation {
addAccount(options: {
accountIdentifier: "7csdcd8-8a5f-49c3-ab9a-0198d42dd253"
name: "Jake, Bob (Braine-l’Alleud) JAM"
userName: "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="20624f420e6d41524c455960434f4e544f532e454a4b">[email protected]</a>"
}) {
accountIdentifier
name
userName
}
}`
)
expect(actual.data).toMatchObject({
data: {
addAccount: {
accountIdentifier: '7csdcd8-8a5f-49c3-ab9a-0198d42dd253',
name: 'Jake, Bob (Braine-l’Alleud) JAM',
userName: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="41032e236f0c20332d243801222e2f352e32650c232c2d">[email protected]</a>',
},
},
})
})
})
If the line require('ts-node/register') is omitted from both files, it results in the following error:
T:\Test\src\it-portal\entity\Account.ts:1 import { ^^^^^^ SyntaxError: Cannot use import statement outside a module
However, including the require line throws:
FAIL src/resolvers/AccountResolver.test.ts × add account (31 ms) ● Account entity › add account ConnectionNotFoundError: Connection "default" was not found.Account entity
Version
"jest": "^26.0.1",
"ts-jest": "^26.1.0",
"ts-node-dev": "^1.0.0-pre.44",
"typescript": "^3.9.5"
Config
// jest.config.js
module.exports = {
preset: 'ts-jest',
globalSetup: './src/test-utils/config/globalSetup.ts',
globalTeardown: './src/test-utils/config/globalTeardown.ts',
setupFiles: ['./src/test-utils/config/setupFiles.ts'],
moduleDirectories: ['node_modules', 'src'],
globals: {
'ts-jest': {
tsConfig: 'tsconfig.json',
diagnostics: {
warnOnly: true,
},
},
},
coverageThreshold: {
global: {
branches: 80,
functions: 80,
lines: 80,
statements: 80,
},
},
coverageReporters: ['json', 'lcov', 'text', 'clover'],
}
Thank you for highlighting my errors. I tried searching for a solution as a newbie, but couldn't determine whether it's my lack of understanding or a tool bug. Came across a similar issue here with a relevant PR.
It seems like the tests run in a completely isolated environment where they cannot access the connection set up in globalSetup.
Workaround
The only workaround I've discovered so far is to include the following code in each test file:
beforeAll(async () => {
await createConnections()
})
afterAll(async () => {
const defaultConnection = getConnection('default')
await defaultConnection.close()
})