deno.land / x / xstate@xstate@4.33.6 / test / typegenTypes.test.ts
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describe('typegen types', () => { it('should not require implementations when creating machine using `createMachine`', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'fooAction'; delays: 'barDelay'; guards: 'bazGuard'; services: 'qwertyService'; }; } createMachine({ tsTypes: {} as TypesMeta }); });
it('should not require implementations when creating machine using `model.createMachine`', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'fooAction'; delays: 'barDelay'; guards: 'bazGuard'; services: 'qwertyService'; }; }
const model = createModel({});
model.createMachine({ tsTypes: {} as TypesMeta }); });
it('should limit event type provided to an action', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingActions: { myAction: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { actions: { myAction: (_ctx, event) => { event.type === 'FOO'; event.type === 'BAR'; // @ts-expect-error event.type === 'BAZ'; } } } ); });
it('should limit event type provided to a delay', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingDelays: { myDelay: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { delays: { myDelay: (_ctx, event) => { event.type === 'FOO'; event.type === 'BAR'; // @ts-expect-error event.type === 'BAZ';
return 42; } } } ); });
it('should limit event type provided to a guard', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingGuards: { myGuard: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { guards: { myGuard: (_ctx, event) => { event.type === 'FOO'; event.type === 'BAR'; // @ts-expect-error event.type === 'BAZ';
return true; } } } ); });
it('should limit event type provided to a service', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingServices: { myService: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { services: { myService: (_ctx, event) => { event.type === 'FOO'; event.type === 'BAR'; // @ts-expect-error event.type === 'BAZ';
return () => {}; } } } ); });
it('should not allow an unknown action', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingActions: { myAction: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { actions: { // @ts-expect-error unknownAction: () => {} } } ); });
it('should not allow an unknown delay', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingDelays: { myDelay: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { delays: { // @ts-expect-error unknownDelay: () => 42 } } ); });
it('should not allow an unknown guard', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingGuards: { myGuard: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { guards: { // @ts-expect-error unknownGuard: () => true } } ); });
it('should not allow an unknown service', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; eventsCausingServices: { myService: 'FOO' | 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { services: { // @ts-expect-error unknownService: () => () => {} } } ); });
it('should allow valid string `matches`', () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | 'b' | 'c'; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } }, initial: 'a', states: { a: {} } });
machine.initialState.matches('a'); });
it('should allow valid object `matches`', () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | { a: 'b' } | { a: 'c' }; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, initial: 'a', states: { a: {} } });
machine.initialState.matches({ a: 'c' }); });
it('should not allow invalid string `matches`', () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | 'b' | 'c'; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } }, initial: 'a', states: { a: {} } });
// @ts-expect-error machine.initialState.matches('d'); });
it('should not allow invalid object `matches`', () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | { a: 'b' } | { a: 'c' }; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, initial: 'a', states: { a: {} } });
// @ts-expect-error machine.initialState.matches({ a: 'd' }); });
it('should allow a valid tag with `hasTag`', () => { interface TypesMeta extends TypegenMeta { tags: 'a' | 'b' | 'c'; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } }, initial: 'a', states: { a: {} } });
machine.initialState.hasTag('a'); });
it('should not allow an invalid tag with `hasTag`', () => { interface TypesMeta extends TypegenMeta { tags: 'a' | 'b' | 'c'; }
const machine = createMachine({ tsTypes: {} as TypesMeta, context: { foo: 100 }, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } }, initial: 'a', states: { a: {} } });
// @ts-expect-error machine.initialState.hasTag('d'); });
it('`withConfig` should require all missing implementations ', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'myAction'; delays: 'myDelay'; guards: never; services: never; }; eventsCausingActions: { myAction: 'FOO'; myDelay: 'BAR'; }; }
const machine = createMachine({ tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } });
// @ts-expect-error machine.withConfig({}); machine.withConfig({ // @ts-expect-error actions: {} }); // @ts-expect-error machine.withConfig({ actions: { myAction: () => {} } }); machine.withConfig({ actions: { myAction: () => {} }, delays: { myDelay: () => 42 } }); });
it('should allow to create a service out of a machine without any missing implementations', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: never; delays: never; guards: never; services: never; }; }
const machine = createMachine({ tsTypes: {} as TypesMeta });
interpret(machine); });
it('should not allow to create a service out of a machine with missing implementations', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'myAction'; delays: never; guards: never; services: never; }; eventsCausingActions: { myAction: 'FOO'; }; }
const machine = createMachine({ tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } });
// @ts-expect-error interpret(machine); });
it('should allow to create a service out of a machine with implementations provided through `withConfig`', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'myAction'; delays: never; guards: never; services: never; }; eventsCausingActions: { myAction: 'FOO'; }; }
const machine = createMachine({ tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } });
interpret( machine.withConfig({ actions: { myAction: () => {} } }) ); });
it('should not require all implementations when creating machine', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'fooAction'; delays: 'barDelay'; guards: 'bazGuard'; services: 'qwertyService'; }; eventsCausingActions: { fooAction: 'FOO' }; eventsCausingDelays: { barDelay: 'BAR' }; eventsCausingGuards: { bazGuard: 'BAR' }; eventsCausingServices: { qwertyService: 'BAR' }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { actions: { fooAction: () => {} } } ); });
it('should allow to override already provided implementation using `withConfig`', () => { interface TypesMeta extends TypegenMeta { missingImplementations: { actions: 'fooAction'; delays: never; guards: never; services: never; }; eventsCausingActions: { fooAction: 'FOO' }; eventsCausingDelays: { barDelay: 'BAR' }; }
const machine = createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } | { type: 'BAZ' } } }, { delays: { barDelay: () => 42 } } );
machine.withConfig({ actions: { fooAction: () => {} }, delays: { barDelay: () => 100 } }); });
it('should preserve provided action type for the meta object', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'FOO' | 'BAR'; }; }
const model = createModel( { foo: 100 }, { actions: { myAction: (x: number) => ({ x }) }, events: { FOO: () => ({}), BAR: () => ({}), BAZ: () => ({}) } } );
model.createMachine( { tsTypes: {} as TypesMeta }, { actions: { myAction: (_ctx, _ev, { action }) => { action.type === 'myAction'; ((_accept: number) => {})(action.x); // @ts-expect-error ((_accept: string) => {})(action.x); } } } ); });
it('should include init event in the provided parameter type if necessary', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'xstate.init'; }; internalEvents: { 'xstate.init': { type: 'xstate.init' }; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } } }, { actions: { myAction: (_ctx, event) => { event.type === 'xstate.init'; } } } ); });
it('should include generated dynamic internal event in the provided parameter if schema.services is not provided', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'done.invoke.myService' | 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } } }, { actions: { myAction: (_ctx, event) => { if (event.type === 'FOO') { return; } event.type === 'done.invoke.myService'; event.data; // indirectly check that it's not any // @ts-expect-error ((_accept: string) => {})(event.data); } } } ); });
it('should use an event generated based on schema.services for a dynamic internal event over the generated fallback', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'done.invoke.myService' | 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' }, services: { myService: { data: {} as string } } } }, { actions: { myAction: (_ctx, event) => { if (event.type === 'FOO') { return; } event.type === 'done.invoke.myService'; event.data; ((_accept: string) => {})(event.data); } } } ); });
it('should allow a promise service returning the explicitly declared data in the given schema.services', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { myService: 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' }, services: { myService: { data: {} as string } } } }, { services: { myService: (_ctx) => Promise.resolve('foo') } } ); });
it('should not allow a promise service returning a different type than the explicitly declared one in the given schema.services', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { myService: 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' }, services: { myService: { data: {} as string } } } }, { services: { // @ts-expect-error myService: (_ctx) => Promise.resolve(42) } } ); });
it('should allow a machine service returning the explicitly declared data in the given schema.services', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { myService: 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' }, services: { myService: { data: {} as { foo: string } } } } }, { services: { myService: (_ctx) => createMachine<{ foo: string }>({}) } } ); });
it('should not allow a machine service returning a different type than the explicitly declared one in the given schema.services', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { myService: 'FOO'; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; __tip: 'Declare the type.'; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' }, services: { myService: { data: {} as { foo: string } } } } }, { services: { // @ts-expect-error myService: (_ctx) => createMachine<{ foo: number }>({}) } } ); });
it('should infer an action object with narrowed event type', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { actionName: 'BAR'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR'; value: string } } }, { actions: { actionName: assign((_context, event) => { ((_accept: 'BAR') => {})(event.type); return {}; }) } } ); });
it('should accept a machine as a service', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { fooService: 'FOO'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR'; value: string } } }, { services: { fooService: createMachine({}) } } ); });
it('should be able to send all of the parent event types back to the parent from an invoked callback', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { fooService: 'FOO'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } } }, { services: { fooService: (_context, event) => (send) => { ((_accept: 'FOO') => {})(event.type);
send({ type: 'BAR' }); send({ type: 'FOO' }); // @ts-expect-error send({ type: 'BAZ' }); } } } ); });
it('It should tighten service types when using model.createMachine', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'done.invoke.myService'; }; eventsCausingServices: { myService: never; }; internalEvents: { 'done.invoke.myService': { type: 'done.invoke.myService'; data: unknown; }; }; invokeSrcNameMap: { myService: 'done.invoke.myService'; }; }
const model = createModel({}, {});
model.createMachine( { tsTypes: {} as TypesMeta, schema: { services: {} as { myService: { data: boolean; }; } } }, { actions: { myAction: (_ctx, event) => { ((_accept: boolean) => {})(event.data); } }, services: { // @ts-expect-error myService: () => Promise.resolve('') } } ); });
it("should not provide a loose type for `onReceive`'s argument as a default", () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { fooService: 'FOO'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } } }, { services: { fooService: (_ctx, _ev) => (_send, onReceive) => { onReceive((event) => { ((_accept: string) => {})(event.type); // @ts-expect-error event.unknown; }); } } } ); });
it("should allow specifying `onReceive`'s argument type manually", () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: { fooService: 'FOO'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { events: {} as { type: 'FOO' } | { type: 'BAR' } } }, { services: { fooService: (_ctx, _ev) => (_send, onReceive) => { onReceive((_event: { type: 'TEST' }) => {}); // @ts-expect-error onReceive((_event: { type: number }) => {}); } } } ); });
it('should error correctly for implementations called in response to internal events when there is no explicit event type', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { myAction: 'done.invoke.invocation'; }; eventsCausingServices: { myInvocation: 'xstate.init'; }; internalEvents: { 'xstate.init': { type: 'xstate.init' }; }; invokeSrcNameMap: { myInvocation: 'done.invoke.invocation'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { services: { myInvocation: {} as { data: string; } } } }, { services: { // @ts-expect-error myInvocation: () => { return Promise.resolve(1); } }, actions: { myAction: (_context, event) => { ((_accept: 'done.invoke.invocation') => {})(event.type); ((_accept: string) => {})(event.data); // @ts-expect-error ((_accept: number) => {})(event.data); } } } ); });
it("shouldn't end up with `any` context after calling `state.matches`", () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | 'b' | 'c'; }
const machine = createMachine({ tsTypes: {} as TypesMeta,
schema: { context: {} as { foo: string; } } });
if (machine.initialState.matches('a')) { // @ts-expect-error machine.initialState.context.val; } });
it("shouldn't end up with `never` within a branch after two `state.matches` calls", () => { interface TypesMeta extends TypegenMeta { matchesStates: 'a' | 'a.b'; }
const machine = createMachine({ tsTypes: {} as TypesMeta, schema: { context: {} as { foo: string; } } });
const state = machine.initialState;
if (state.matches('a') && state.matches('a.b')) { ((_accept: string) => {})(state.context.foo); } });
it('should be possible to pass typegen-less machines to functions expecting a machine argument that do not utilize the typegen information', () => { const machine = createMachine({});
function acceptMachine<TContext, TEvent extends { type: string }>( machine: StateMachine<TContext, any, TEvent> ) { return machine; }
acceptMachine(machine); });
it('should error on a provided action where there are no inferred actions', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: never; }
createMachine( { tsTypes: {} as TypesMeta, schema: { context: {} as { foo: string; } } }, { // @ts-expect-error actions: { testAction: () => {} } } ); });
it('should error on a provided delay where there are no inferred delays', () => { interface TypesMeta extends TypegenMeta { eventsCausingDelays: never; }
createMachine( { tsTypes: {} as TypesMeta, schema: { context: {} as { foo: string; } } }, { // @ts-expect-error delays: { testDelay: () => {} } } ); });
it('should error on a provided guard where there are no inferred guards', () => { interface TypesMeta extends TypegenMeta { eventsCausingGuards: never; }
createMachine( { tsTypes: {} as TypesMeta, schema: { context: {} as { foo: string; } } }, { // @ts-expect-error guards: { testGuard: () => {} } } ); });
it('should error on a provided service where there are no declared services', () => { interface TypesMeta extends TypegenMeta { eventsCausingServices: never; invokeSrcNameMap: never; }
createMachine( { tsTypes: {} as TypesMeta, schema: { context: {} as { foo: string; } } }, { // @ts-expect-error services: { testService: () => Promise.resolve(42) } } ); });
it('should be able to provide events that use string unions as their type', () => { interface TypesMeta extends TypegenMeta { eventsCausingActions: { increment: 'INC'; decrement: 'DEC'; }; }
createMachine( { tsTypes: {} as TypesMeta, schema: { context: {} as { count: number; }, events: {} as { type: 'INC' | 'DEC'; value: number } } }, { actions: { increment: assign((ctx, ev) => { return { count: ctx.count + ev.value }; }) } } ); });});
xstate
Version Info
2 years ago
