**Issue with Injecting HttpClient.Fetch for Unit Tests in API Client Adapter**

import {
  HttpClient,
  HttpClientRequest,
  HttpClientResponse,
} from "@effect/platform";
import { Schema } from "@effect/schema";

import { Context, Effect, Layer, pipe } from "effect";

type Note = {
  id: string;
  note: string;
};

type Author = {
  id: string;
  name: string;
};

interface ApiClient {
  createNote(author: Author, note: string): Effect.Effect<string, any, never>;
  // other methods
}

const ApiClient = Context.GenericTag<ApiClient>("ApiClient");

const createClientAdapter = () =>
  Layer.effect(
    ApiClient,
    pipe(
      HttpClient.fetchOk,
      HttpClient.mapRequest(
        HttpClientRequest.prependUrl("https://api.example.com")
      ),
      HttpClient.mapRequest(HttpClientRequest.accept("application/json")),
      HttpClient.mapRequest(
        HttpClientRequest.setHeaders({
          "Content-Type": "application/json",
        })
      ),
      (client) =>
        ApiClient.of({
          createNote: (author, note) =>
            pipe(
              HttpClientRequest.post("/notes"),
              HttpClientRequest.schemaBody(Schema.Any)({ author, note }),
              Effect.flatMap(client),
              Effect.flatMap(HttpClientResponse.schemaBodyJson(Schema.String)),
              Effect.scoped
            ),
        }),
      Effect.succeed
    )
  );

// Mock fetch implementation
const FetchTest = Layer.succeed(HttpClient.Fetch, () =>
  Promise.resolve(new Response("not found", { status: 404 }))
);

// Test
const apiClient = Effect.runSync(
  pipe(
    ApiClient,
    Effect.provide(createClientAdapter()),
    Effect.provide(FetchTest)
  )
);

Effect.runPromise(
  apiClient.createNote({ id: "1", name: "John" }, "Hello world!")
).then((result) => {
  console.log(result);
});

import {
  HttpClient,
  HttpClientRequest,
  HttpClientResponse,
} from "@effect/platform";
import { Schema } from "@effect/schema";

import { Context, Effect, Layer, pipe } from "effect";

type Note = {
  id: string;
  note: string;
};

type Author = {
  id: string;
  name: string;
};

interface ApiClient {
  createNote(author: Author, note: string): Effect.Effect<string, any, never>;
  // other methods
}

const ApiClient = Context.GenericTag<ApiClient>("ApiClient");

const createClientAdapter = () =>
  Layer.effect(
    ApiClient,
    pipe(
      HttpClient.fetchOk,
      HttpClient.mapRequest(
        HttpClientRequest.prependUrl("https://api.example.com")
      ),
      HttpClient.mapRequest(HttpClientRequest.accept("application/json")),
      HttpClient.mapRequest(
        HttpClientRequest.setHeaders({
          "Content-Type": "application/json",
        })
      ),
      (client) =>
        ApiClient.of({
          createNote: (author, note) =>
            pipe(
              HttpClientRequest.post("/notes"),
              HttpClientRequest.schemaBody(Schema.Any)({ author, note }),
              Effect.flatMap(client),
              Effect.flatMap(HttpClientResponse.schemaBodyJson(Schema.String)),
              Effect.scoped
            ),
        }),
      Effect.succeed
    )
  );

// Mock fetch implementation
const FetchTest = Layer.succeed(HttpClient.Fetch, () =>
  Promise.resolve(new Response("not found", { status: 404 }))
);

// Test
const apiClient = Effect.runSync(
  pipe(
    ApiClient,
    Effect.provide(createClientAdapter()),
    Effect.provide(FetchTest)
  )
);

Effect.runPromise(
  apiClient.createNote({ id: "1", name: "John" }, "Hello world!")
).then((result) => {
  console.log(result);
});