openAgent

1import { describe, expect } from "bun:test"
2import { Config, ConfigProvider, Context, Effect, Layer, Option } from "effect"
3import { ConfigService } from "../../src/effect/config-service"
4import { it } from "../lib/effect"
5 
6class TestConfig extends ConfigService.Service<TestConfig>()("@test/ConfigService", {
7  name: Config.string("NAME"),
8  token: Config.string("TOKEN").pipe(Config.option),
9  port: Config.number("PORT").pipe(Config.withDefault(3000)),
10}) {}
11 
12const fromConfig = (input: Record<string, unknown>) =>
13  TestConfig.layer.pipe(Layer.provide(ConfigProvider.layer(ConfigProvider.fromUnknown(input))))
14 
15const readConfig = TestConfig.useSync((config) => config)
16 
17describe("ConfigService", () => {
18  it.effect("layer parses values from the active ConfigProvider", () =>
19    Effect.gen(function* () {
20      const config = yield* readConfig.pipe(
21        Effect.provide(
22          fromConfig({
23            NAME: "kit",
24            TOKEN: "secret",
25            PORT: "4096",
26          }),
27        ),
28      )
29 
30      expect(config.name).toBe("kit")
31      expect(config.token).toEqual(Option.some("secret"))
32      expect(config.port).toBe(4096)
33    }),
34  )
35 
36  it.effect("layer applies Effect Config defaults", () =>
37    Effect.gen(function* () {
38      const config = yield* readConfig.pipe(Effect.provide(fromConfig({ NAME: "kit" })))
39 
40      expect(config.name).toBe("kit")
41      expect(config.token).toEqual(Option.none())
42      expect(config.port).toBe(3000)
43    }),
44  )
45 
46  it.effect("layer provides an already parsed service value", () =>
47    Effect.gen(function* () {
48      const config = yield* readConfig.pipe(
49        Effect.provide(
50          TestConfig.configLayer({
51            name: "direct",
52            token: Option.some("parsed"),
53            port: 9000,
54          }),
55        ),
56      )
57 
58      expect(config).toEqual({
59        name: "direct",
60        token: Option.some("parsed"),
61        port: 9000,
62      } satisfies Context.Service.Shape<typeof TestConfig>)
63    }),
64  )
65})
66