Effect-TS/effect @effect/vitest@0.10.5

on GitHub

Patch Changes

• #3689 4d91f41 Thanks @tim-smart! - add layer api to @effect/vitest

  This allows you to share a Layer between multiple tests, optionally wrapping
  the tests in a describe block.

  import { expect, layer } from "@effect/vitest"
  import { Context, Effect, Layer } from "effect"
  
  class Foo extends Context.Tag("Foo")<Foo, "foo">() {
    static Live = Layer.succeed(Foo, "foo")
  }
  
  class Bar extends Context.Tag("Bar")<Bar, "bar">() {
    static Live = Layer.effect(
      Bar,
      Effect.map(Foo, () => "bar" as const)
    )
  }
  
  layer(Foo.Live)("layer", (it) => {
    it.effect("adds context", () =>
      Effect.gen(function* () {
        const foo = yield* Foo
        expect(foo).toEqual("foo")
      })
    )
  
    it.layer(Bar.Live)("nested", (it) => {
      it.effect("adds context", () =>
        Effect.gen(function* () {
          const foo = yield* Foo
          const bar = yield* Bar
          expect(foo).toEqual("foo")
          expect(bar).toEqual("bar")
        })
      )
    })
  })