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@connectedcars/test
Advanced tools
Connected Cars JavaScript/TypeScript testing utilities
npm install --save-dev @connectedcars/test
Start a mysqld in a tmp folder and migrate from files in ./migrations:
// Start a new mysqld in a tmp folder
const mySqlServer = new MySQLServer()
// Migrate the started server with migrations from the package @connectedcars/data
const mySqlClient = new MySQLClient({ port: await mySqlServer.getListenPort() })
const migrate = new Migrate({
mysqlClient: mySqlClient,
// First try local cache else use the one in @connectedcars/data
cachePaths:['./cache', './node_modules/@connectedcars/data/cache'],
migrationsDir: './node_modules/@connectedcars/data/migrations',
})
let migrationResult = await migrate.migrate() // Run all migrations
// Connect to the database and run some queries
const pool = await mySqlClient.getConnectionPool('myDataBase')
const databases: string[] = await this.mySqlClient.queryArray<string>(basePool,
`
SELECT SCHEMA_NAME as \`name\`
FROM information_schema.SCHEMATA;
`
)
const tableColumns = await this.mySqlClient.query<{ name: string; column: string; extra: string }>(basePool,
`
SELECT TABLE_NAME as \`name\`, COLUMN_NAME as \`column\`, EXTRA as extra
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = DATABASE()
ORDER BY \`name\`;
`
)
// Creates a copy of myDataBase with a new name and return a pool with this is a the default database
let myPoolCopy = this.mySqlClient.createDatabaseCopy('myDataBase')
To greatly speed up initial start and migrations add an npm script that builds startup cache:
package.json:
"scripts": {
"build-cache": "cache-migrations",
}
npm run build-cache
Stubs all environment variable keys passed into the constructor. This allows you to set the variables in a test case (for example process.env.LOG_LEVEL = 'ERROR'
) without those changes persisting between test cases.
describe('database/config', () => {
let envStub: EnvStub
beforeEach(() => {
envStub = new EnvStub(['CORE_DB', 'LOG_LEVEL'])
})
afterEach(() => {
envStub.restore()
})
test('some test', () => {
// CORE_DB and LOG_LEVEL are always undefined until explicitly defined in a test case
})
})
FAQs
Test utilities for Node projects
The npm package @connectedcars/test receives a total of 273 weekly downloads. As such, @connectedcars/test popularity was classified as not popular.
We found that @connectedcars/test demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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