deno.land / std@0.166.0 / testing / bdd.ts

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
/** A [BDD](https://en.wikipedia.org/wiki/Behavior-driven_development) interface * to `Deno.test()` API. * * @module */
import { DescribeDefinition, HookNames, ItDefinition, TestSuite, TestSuiteInternal,} from "./_test_suite.ts";export type { DescribeDefinition, ItDefinition, TestSuite };
/** The arguments for an ItFunction. */export type ItArgs<T> = | [options: ItDefinition<T>] | [ name: string, options: Omit<ItDefinition<T>, "name">, ] | [ name: string, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [fn: (this: T, t: Deno.TestContext) => void | Promise<void>] | [ name: string, options: Omit<ItDefinition<T>, "fn" | "name">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ options: Omit<ItDefinition<T>, "fn">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ options: Omit<ItDefinition<T>, "fn" | "name">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ suite: TestSuite<T>, name: string, options: Omit<ItDefinition<T>, "name" | "suite">, ] | [ suite: TestSuite<T>, name: string, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ suite: TestSuite<T>, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ suite: TestSuite<T>, name: string, options: Omit<ItDefinition<T>, "fn" | "name" | "suite">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ suite: TestSuite<T>, options: Omit<ItDefinition<T>, "fn" | "suite">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ] | [ suite: TestSuite<T>, options: Omit<ItDefinition<T>, "fn" | "name" | "suite">, fn: (this: T, t: Deno.TestContext) => void | Promise<void>, ];
/** Generates an ItDefinition from ItArgs. */function itDefinition<T>(...args: ItArgs<T>): ItDefinition<T> { let [ suiteOptionsOrNameOrFn, optionsOrNameOrFn, optionsOrFn, fn, ] = args; let suite: TestSuite<T> | undefined = undefined; let name: string; let options: | ItDefinition<T> | Omit<ItDefinition<T>, "fn"> | Omit<ItDefinition<T>, "name"> | Omit<ItDefinition<T>, "fn" | "name">; if ( typeof suiteOptionsOrNameOrFn === "object" && typeof (suiteOptionsOrNameOrFn as TestSuite<T>).symbol === "symbol" ) { suite = suiteOptionsOrNameOrFn as TestSuite<T>; } else { fn = optionsOrFn as typeof fn; optionsOrFn = optionsOrNameOrFn as typeof optionsOrFn; optionsOrNameOrFn = suiteOptionsOrNameOrFn as typeof optionsOrNameOrFn; } if (typeof optionsOrNameOrFn === "string") { name = optionsOrNameOrFn; if (typeof optionsOrFn === "function") { fn = optionsOrFn; options = {}; } else { options = optionsOrFn!; if (!fn) fn = (options as Omit<ItDefinition<T>, "name">).fn; } } else if (typeof optionsOrNameOrFn === "function") { fn = optionsOrNameOrFn; name = fn.name; options = {}; } else { options = optionsOrNameOrFn!; if (typeof optionsOrFn === "function") { fn = optionsOrFn; } else { fn = (options as ItDefinition<T>).fn; } name = (options as ItDefinition<T>).name ?? fn.name; }
return { suite, ...options, name, fn, };}
/** Registers an individual test case. */export interface it { <T>(...args: ItArgs<T>): void;
/** Registers an individual test case with only set to true. */ only<T>(...args: ItArgs<T>): void;
/** Registers an individual test case with ignore set to true. */ ignore<T>(...args: ItArgs<T>): void;}
/** Registers an individual test case. */export function it<T>(...args: ItArgs<T>) { if (TestSuiteInternal.runningCount > 0) { throw new Error( "cannot register new test cases after already registered test cases start running", ); } const options = itDefinition(...args); const { suite } = options; const testSuite = suite ? TestSuiteInternal.suites.get(suite.symbol) : TestSuiteInternal.current;
if (!TestSuiteInternal.started) TestSuiteInternal.started = true; if (testSuite) { TestSuiteInternal.addStep(testSuite, options); } else { const { name, fn, ignore, only, permissions, sanitizeExit, sanitizeOps, sanitizeResources, } = options; TestSuiteInternal.registerTest({ name, ignore, only, permissions, sanitizeExit, sanitizeOps, sanitizeResources, async fn(t) { TestSuiteInternal.runningCount++; try { await fn.call({} as T, t); } finally { TestSuiteInternal.runningCount--; } }, }); }}
it.only = function itOnly<T>(...args: ItArgs<T>) { const options = itDefinition(...args); return it({ ...options, only: true, });};
it.ignore = function itIgnore<T>(...args: ItArgs<T>) { const options = itDefinition(...args); return it({ ...options, ignore: true, });};
function addHook<T>( name: HookNames, fn: (this: T) => void | Promise<void>,) { if (!TestSuiteInternal.current) { if (TestSuiteInternal.started) { throw new Error( "cannot add global hooks after a global test is registered", ); } TestSuiteInternal.current = new TestSuiteInternal({ name: "global", [name]: fn, }); } else { TestSuiteInternal.setHook(TestSuiteInternal.current!, name, fn); }}
/** Run some shared setup before all of the tests in the suite. */export function beforeAll<T>( fn: (this: T) => void | Promise<void>,) { addHook("beforeAll", fn);}
/** Run some shared teardown after all of the tests in the suite. */export function afterAll<T>( fn: (this: T) => void | Promise<void>,) { addHook("afterAll", fn);}
/** Run some shared setup before each test in the suite. */export function beforeEach<T>( fn: (this: T) => void | Promise<void>,) { addHook("beforeEach", fn);}
/** Run some shared teardown after each test in the suite. */export function afterEach<T>( fn: (this: T) => void | Promise<void>,) { addHook("afterEach", fn);}
/** The arguments for a DescribeFunction. */export type DescribeArgs<T> = | [options: DescribeDefinition<T>] | [name: string] | [ name: string, options: Omit<DescribeDefinition<T>, "name">, ] | [name: string, fn: () => void] | [fn: () => void] | [ name: string, options: Omit<DescribeDefinition<T>, "fn" | "name">, fn: () => void, ] | [ options: Omit<DescribeDefinition<T>, "fn">, fn: () => void, ] | [ options: Omit<DescribeDefinition<T>, "fn" | "name">, fn: () => void, ] | [ suite: TestSuite<T>, name: string, ] | [ suite: TestSuite<T>, name: string, options: Omit<DescribeDefinition<T>, "name" | "suite">, ] | [ suite: TestSuite<T>, name: string, fn: () => void, ] | [ suite: TestSuite<T>, fn: () => void, ] | [ suite: TestSuite<T>, name: string, options: Omit<DescribeDefinition<T>, "fn" | "name" | "suite">, fn: () => void, ] | [ suite: TestSuite<T>, options: Omit<DescribeDefinition<T>, "fn" | "suite">, fn: () => void, ] | [ suite: TestSuite<T>, options: Omit<DescribeDefinition<T>, "fn" | "name" | "suite">, fn: () => void, ];
/** Generates a DescribeDefinition from DescribeArgs. */function describeDefinition<T>( ...args: DescribeArgs<T>): DescribeDefinition<T> { let [ suiteOptionsOrNameOrFn, optionsOrNameOrFn, optionsOrFn, fn, ] = args; let suite: TestSuite<T> | undefined = undefined; let name: string; let options: | DescribeDefinition<T> | Omit<DescribeDefinition<T>, "fn"> | Omit<DescribeDefinition<T>, "name"> | Omit<DescribeDefinition<T>, "fn" | "name">; if ( typeof suiteOptionsOrNameOrFn === "object" && typeof (suiteOptionsOrNameOrFn as TestSuite<T>).symbol === "symbol" ) { suite = suiteOptionsOrNameOrFn as TestSuite<T>; } else { fn = optionsOrFn as typeof fn; optionsOrFn = optionsOrNameOrFn as typeof optionsOrFn; optionsOrNameOrFn = suiteOptionsOrNameOrFn as typeof optionsOrNameOrFn; } if (typeof optionsOrNameOrFn === "string") { name = optionsOrNameOrFn; if (typeof optionsOrFn === "function") { fn = optionsOrFn; options = {}; } else { options = optionsOrFn ?? {}; if (!fn) fn = (options as Omit<DescribeDefinition<T>, "name">).fn; } } else if (typeof optionsOrNameOrFn === "function") { fn = optionsOrNameOrFn; name = fn.name; options = {}; } else { options = optionsOrNameOrFn ?? {}; if (typeof optionsOrFn === "function") { fn = optionsOrFn; } else { fn = (options as DescribeDefinition<T>).fn; } name = (options as DescribeDefinition<T>).name ?? fn?.name ?? ""; }
if (!suite) { suite = options.suite; } if (!suite && TestSuiteInternal.current) { const { symbol } = TestSuiteInternal.current; suite = { symbol }; }
return { ...options, suite, name, fn, };}
/** Registers a test suite. */export interface describe { <T>(...args: DescribeArgs<T>): TestSuite<T>;
/** Registers a test suite with only set to true. */ only<T>(...args: DescribeArgs<T>): TestSuite<T>;
/** Registers a test suite with ignore set to true. */ ignore<T>(...args: DescribeArgs<T>): TestSuite<T>;}
/** Registers a test suite. */export function describe<T>( ...args: DescribeArgs<T>): TestSuite<T> { if (TestSuiteInternal.runningCount > 0) { throw new Error( "cannot register new test suites after already registered test cases start running", ); } const options = describeDefinition(...args); if (!TestSuiteInternal.started) TestSuiteInternal.started = true; const { symbol } = new TestSuiteInternal(options); return { symbol };}
describe.only = function describeOnly<T>( ...args: DescribeArgs<T>): TestSuite<T> { const options = describeDefinition(...args); return describe({ ...options, only: true, });};
describe.ignore = function describeIgnore<T>( ...args: DescribeArgs<T>): TestSuite<T> { const options = describeDefinition(...args); return describe({ ...options, ignore: true, });};
std
Deno standard library
GitHub Repositorydenoland/deno_std
GitHub Stars
2457

Version Info

Tagged at
2 months ago