/
integrationTest.ts
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/
integrationTest.ts
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import { IntrospectionEngine } from '@prisma/sdk'
import slugify from '@sindresorhus/slugify'
import fs from 'fs-jetpack'
import { FSJetpack } from 'fs-jetpack/types'
import path from 'path'
import hash from 'string-hash'
import VError, { MultiError } from 'verror'
import { getTestClient } from '@prisma/client/dist/utils/getTestClient'
process.setMaxListeners(200)
process.env.SKIP_GENERATE = 'true'
const engine = new IntrospectionEngine()
/**
* A potentially async value
*/
type MaybePromise<T = void> = Promise<T> | T
/**
* Configuration for an integration test.
*/
type Scenario = {
/**
* Only run this test case (and any others with only set).
*/
only?: boolean
/**
* Do not run this test case.
*/
todo?: boolean
/**
* Name of the test case. Influences the temp dir, snapshot, etc.
*/
name: string
/**
* SQL to put database into pre-test condition.
*/
up: string
/**
* Arbitrary Prisma client logic to test.
*/
do: (client: any) => Promise<any>
/**
* Value that the "do" operation should result in.
*/
expect: any
}
/**
* Contextual data and API attached to each integration test run.
*/
export type Context = {
/**
* Jetpack instance bound to the integration test temporary directory.
*/
fs: FSJetpack
/**
* The name of the current test being run.
*/
scenarioName: string
/**
* The name of the current test being run, slugified.
*/
scenarioSlug: string
/**
* The ID for the current scenario test being run.
*/
id: string
}
/**
* Integration test database interface.
*/
type Database<Client> = {
/**
* Name of the database being worked with.
*
* @remarks This is used as the default provider name for the Prisma schema datasource block.
*/
name: string
/**
* Create a client connection to the database.
*/
connect: (ctx: Context) => MaybePromise<Client>
/**
* Run logic before each scenario. Typically used to run scenario SQL setup against the database.
*/
beforeEach: (
db: Client,
sqlScenario: string,
ctx: Context,
) => MaybePromise<any>
/**
* At the end of _each_ test run logic
*/
afterEach?: (db: Client) => MaybePromise
/**
* At the end of _all_ tests run logic to close the database connection.
*/
close?: (db: Client) => MaybePromise
/**
* Give the connection URL for the Prisma schema datasource block or provide your own custom implementation.
*/
datasource:
| {
/**
* Construct the whole datasource block for the Prisma schema
*/
raw: (ctx: Context) => string
}
| {
/**
* Supply the connection URL used in the datasource block.
*/
url: string | ((ctx: Context) => string)
/**
* Supply the provider name used in the datasource block.
*
* @dynamicDefault The value passed to database.name
*/
provider?: string
}
}
/**
* Settings to control things like test timeout and Prisma engine version.
*/
type Settings = {
/**
* How long each test case should have to run to completion.
*
* @default 15_000
*/
timeout?: number
/**
* The version of Prisma Engine to use.
*
* @dynamicDefault The result of `@prisma/fetch-engine#getLatestTag`
*/
engineVersion?: MaybePromise<string>
/**
* After a test scenario is done, should its temporary directory be removed from disk?
*/
cleanupTempDirs?: boolean
}
/**
* A list of available preview features on the Prisma client.
*/
type PreviewFeature =
| 'connectOrCreate'
| 'microsoftSqlServer'
| 'transactionApi'
/**
* Settings to add properties on the Prisma client.
*/
type PrismaClientSettings = {
/**
* Supply the enabled preview features for the Prisma client.
*/
previewFeatures?: PreviewFeature[]
}
/**
* Integration test keyword arguments
*/
export type Input<Client = any> = {
database: Database<Client>
scenarios: Scenario[]
settings?: Settings
prismaClientSettings?: PrismaClientSettings
}
type ScenarioState<Client = any> = {
scenario: Scenario
ctx: Context
database: Input<Client>['database']
db: Client
prisma: any
input: Input<Client>
}
/**
* Run introspection integration test
*/
export function introspectionIntegrationTest<Client>(input: Input<Client>) {
const kind = 'introspection'
const states: Record<string, ScenarioState<Client>> = {}
beforeAll(() => {
beforeAllScenarios(kind, input)
})
afterAll(() => {
afterAllScenarios(kind, states)
})
/**
* it.concurrent.each (https://jestjs.io/docs/en/api#testconcurrenteachtablename-fn-timeout)
* does not seem to work. Snapshots keep getting errors. And each runs leads to different
* snapshot errors. Might be related to https://github.com/facebook/jest/issues/2180 but we're
* explicitly naming our snapshots here so...?
*
* If we ever make use of test.concurrent we will need to rethink our ctx system:
* https://github.com/facebook/jest/issues/10513
*/
it.each(filterTestScenarios(input.scenarios))(
`${kind}: %s`,
async (_, scenario) => {
const { state, introspectionResult } = await setupScenario(
kind,
input,
scenario,
)
states[scenario.name] = state
expect(introspectionResult.datamodel).toMatchSnapshot(`datamodel`)
expect(introspectionResult.warnings).toMatchSnapshot(`warnings`)
await teardownScenario(state)
},
input.settings?.timeout ?? 30_000,
)
}
/**
* Run a runtime integration tests
*/
export function runtimeIntegrationTest<Client>(input: Input<Client>) {
const kind = 'runtime'
const states: Record<string, ScenarioState<Client>> = {}
beforeAll(() => {
beforeAllScenarios(kind, input)
})
afterAll(() => {
afterAllScenarios(kind, states)
})
it.concurrent.each(filterTestScenarios(input.scenarios).slice(0, 1))(
`${kind}: %s`,
async (_, scenario) => {
const { ctx, state } = await setupScenario(kind, input, scenario)
states[scenario.name] = state
const PrismaClient = await getTestClient(ctx.fs.cwd())
state.prisma = new PrismaClient()
await state.prisma.$connect()
const result = await scenario.do(state.prisma)
expect(result).toEqual(scenario.expect)
await teardownScenario(state)
},
input.settings?.timeout ?? 30_000,
)
}
function afterAllScenarios(
kind: string,
states: Record<string, ScenarioState>,
) {
engine.stop()
Object.values(states).forEach(async (state) => {
// props might be missing if test errors out before they are set.
if (state.db && state.input.database.close) {
await state.input.database.close(state.db)
}
if (state.input.settings?.cleanupTempDirs !== false) {
fs.remove(getScenariosDir(state.input.database.name, kind))
}
})
}
function beforeAllScenarios(testKind: string, input: Input) {
fs.remove(getScenariosDir(input.database.name, testKind))
}
/**
* Setup the scenario test context and state and Prisma datamodel.
*/
async function setupScenario(kind: string, input: Input, scenario: Scenario) {
const state: ScenarioState = {} as any
const ctx: Context = {} as any
const dir = getScenarioDir(input.database.name, kind, scenario.name)
ctx.fs = fs.cwd(dir)
ctx.scenarioName = `${kind}: ${scenario.name}`
ctx.scenarioSlug = slugify(ctx.scenarioName, { separator: '_' })
ctx.id = `${ctx.scenarioSlug.slice(0, 7)}_${hash(ctx.scenarioSlug)}`
state.input = input
state.ctx = ctx
state.scenario = scenario
await ctx.fs.dirAsync('.')
state.db = await input.database.connect(ctx)
await input.database.beforeEach(state.db, scenario.up, ctx)
const datasourceBlock =
'raw' in input.database.datasource
? input.database.datasource.raw(ctx)
: makeDatasourceBlock(
input.database.datasource.provider ?? input.database.name,
typeof input.database.datasource.url === 'function'
? input.database.datasource.url(ctx)
: input.database.datasource.url,
)
const schemaBase = `
generator client {
provider = "prisma-client-js"
output = "${ctx.fs.path()}"
${renderPreviewFeatures(input.prismaClientSettings?.previewFeatures)}
}
${datasourceBlock}
`
const introspectionResult = await engine.introspect(schemaBase)
const prismaSchemaPath = ctx.fs.path('schema.prisma')
await fs.writeAsync(prismaSchemaPath, introspectionResult.datamodel)
return {
introspectionResult,
state,
ctx,
prismaSchemaPath,
}
}
async function teardownScenario(state: ScenarioState) {
const errors: any[] = []
// props might be missing if test errors out before they are set.
if (state.db) {
await Promise.resolve(state.input.database.afterEach?.(state.db))
.catch((e) => errors.push(e))
.then(() => state.prisma?.$disconnect())
.catch((e) => errors.push(e))
}
if (errors.length) {
throw new VError(
new MultiError(errors),
'Got Errors while running scenario teardown',
)
}
}
/**
* Convert test scenarios into something jest.each can consume
*/
function filterTestScenarios(scenarios: Scenario[]): [string, Scenario][] {
const onlys = scenarios.filter((scenario) => scenario.only)
if (onlys.length) {
return onlys.map((scenario) => [scenario.name, scenario])
}
return scenarios
.filter((scenario) => scenario.todo !== true)
.map((scenario) => [scenario.name, scenario])
}
/**
* Get the temporary directory for the scenario
*/
function getScenarioDir(
databaseName: string,
testKind: string,
scenarioName: string,
) {
return path.join(
getScenariosDir(databaseName, testKind),
slugify(scenarioName),
)
}
/**
* Get the temporary directory for the scenarios
*/
function getScenariosDir(databaseName: string, testKind: string) {
// use tmp dir instead, as that often times is ramdisk
return path.join(
'/tmp/prisma-tests',
`integration-test-${databaseName}-${testKind}`,
)
}
/**
* Create a Prisma schema datasource block.
*/
function makeDatasourceBlock(providerName: string, url: string) {
return `
datasource ${providerName} {
provider = "${providerName}"
url = "${url}"
}
`
}
/**
* Create Prisma schema enabled features array of strings.
*/
function renderPreviewFeatures(
featureMatrix: PreviewFeature[] | undefined,
) {
if (featureMatrix) {
return `previewFeatures = [${featureMatrix.map(
(feature) => `"` + feature + `"`,
)}]`
}
return ''
}