Testing a Deno project with Vitest

Is it possible ?
I have a monorepo mixing Deno & Node package. I wanted to use only a single testing library like Vitest

If we use vitest as a runner : can't resolve Deno import style like

import { generate } from "@std/uuid/unstable-v7";

import { generate } from "@std/uuid/unstable-v7";

import { generate } from "@std/uuid/unstable-v7";

import { generate } from "@std/uuid/unstable-v7";
if we use vitest as a library : error see issue https://github.com/denoland/deno/issues/31302

Has someone already use Vitest in project ?

index.ts

import { generate } from "@std/uuid/unstable-v7";

export const uuid = (): string => {
  return generate();
};

import { generate } from "@std/uuid/unstable-v7";

export const uuid = (): string => {
  return generate();
};

import { generate } from "@std/uuid/unstable-v7";

export const uuid = (): string => {
  return generate();
};

import { generate } from "@std/uuid/unstable-v7";

export const uuid = (): string => {
  return generate();
};

test

import { assertType, test } from "vitest";
import { uuid } from "./index.ts";

test("uuid", () => {
  assertType<string>(uuid());
});

import { assertType, test } from "vitest";
import { uuid } from "./index.ts";

test("uuid", () => {
  assertType<string>(uuid());
});

import { assertType, test } from "vitest";
import { uuid } from "./index.ts";

test("uuid", () => {
  assertType<string>(uuid());
});

import { assertType, test } from "vitest";
import { uuid } from "./index.ts";

test("uuid", () => {
  assertType<string>(uuid());
});

deno.json

{
  "name": "@foobar/deno-vitest",
  "exports": {
    "./index.ts": "./index.ts",
  },
  "imports": {
    "@std/uuid": "jsr:@std/uuid@^1.0",
    "vitest": "npm:vitest",
  },
  "tasks": {
    "test": "deno run -A --node-modules-dir npm:vitest",
  },
}

{
  "name": "@foobar/deno-vitest",
  "exports": {
    "./index.ts": "./index.ts",
  },
  "imports": {
    "@std/uuid": "jsr:@std/uuid@^1.0",
    "vitest": "npm:vitest",
  },
  "tasks": {
    "test": "deno run -A --node-modules-dir npm:vitest",
  },
}

{
  "name": "@foobar/deno-vitest",
  "exports": {
    "./index.ts": "./index.ts",
  },
  "imports": {
    "@std/uuid": "jsr:@std/uuid@^1.0",
    "vitest": "npm:vitest",
  },
  "tasks": {
    "test": "deno run -A --node-modules-dir npm:vitest",
  },
}

{
  "name": "@foobar/deno-vitest",
  "exports": {
    "./index.ts": "./index.ts",
  },
  "imports": {
    "@std/uuid": "jsr:@std/uuid@^1.0",
    "vitest": "npm:vitest",
  },
  "tasks": {
    "test": "deno run -A --node-modules-dir npm:vitest",
  },
}

GitHub

Vitest report an error with assertType<string> · Issue #31302 · d...

Version: Deno 2.5.6 I run Deno test with Vitest library and want to test assertType<string> Is it due to Deno or Vitest ? assertType("aaa") => works assertType(uuid()) => erro...

Testing a Deno project with Vitest

Similar Threads

Similar Threads

Similar Threads