test: migrate types unit tests to vitest

packages/types/package.json

@@ -61,10 +61,13 @@
     "check-types": "tsc",
     "lint": "eslint --color --ext .ts src/ test/",
     "lint:fix": "yarn run lint --fix",
-    "test:unit": "yarn test:constants:minimal && yarn test:constants:mainnet && mocha 'test/unit/**/*.test.ts'",
-    "test:constants:minimal": "LODESTAR_PRESET=minimal mocha 'test/constants/**/*.test.ts'",
-    "test:constants:mainnet": "LODESTAR_PRESET=mainnet mocha 'test/constants/**/*.test.ts'",
-    "test:browsers": "yarn karma start karma.config.cjs",
+    "test:constants:minimal": "LODESTAR_PRESET=minimal vitest --run --dir test/constants/ --coverage",
+    "test:constants:mainnet": "LODESTAR_PRESET=mainnet vitest --run --dir test/constants/ --coverage",
+    "test:unit": "yarn test:constants:minimal && yarn test:constants:mainnet && vitest --run --dir test/unit/ --coverage",
+    "test:browsers": "yarn test:browsers:chrome && yarn test:browsers:firefox && yarn test:browsers:electron",
+    "test:browsers:chrome": "vitest --run --browser chrome --config ./vitest.browser.config.ts --dir test/unit",
+    "test:browsers:firefox": "vitest --run --browser firefox --config ./vitest.browser.config.ts --dir test/unit",
+    "test:browsers:electron": "echo 'Electron tests will be introduced back in the future as soon vitest supports electron.'",
     "check-readme": "typescript-docs-verifier"
   },
   "types": "lib/index.d.ts",

packages/types/test/constants/blobs.test.ts

@@ -1,4 +1,4 @@
-import {expect} from "chai";
+import {describe, it, expect} from "vitest";
 import * as constants from "@lodestar/params";
 import {ssz} from "../../src/index.js";
 

packages/types/test/constants/lightclient.test.ts

@@ -1,4 +1,4 @@
-import {expect} from "chai";
+import {describe, it, expect} from "vitest";
 import * as constants from "@lodestar/params";
 import {ssz} from "../../src/index.js";
 
@@ -26,7 +26,7 @@ describe(`${constants.ACTIVE_PRESET}/ Lightclient pre-computed constants`, () =>
 
   for (const [key, expectedValue] of Object.entries(correctConstants)) {
     it(key, () => {
-      expect((constants as unknown as Record<string, number>)[key]).to.equal(expectedValue);
+      expect((constants as unknown as Record<string, number>)[key]).toBe(expectedValue);
     });
   }
 });

packages/types/test/globalSetup.ts

@@ -0,0 +1,2 @@
+export async function setup(): Promise<void> {}
+export async function teardown(): Promise<void> {}

packages/types/test/unit/ssz.test.ts

@@ -1,13 +1,13 @@
-import {expect} from "chai";
+import {describe, it, expect} from "vitest";
 import {ssz} from "../../src/index.js";
 
 describe("size", function () {
   it("should calculate correct minSize and maxSize", () => {
     const minSize = ssz.phase0.BeaconState.minSize;
     const maxSize = ssz.phase0.BeaconState.maxSize;
     // https://gist.github.com/protolambda/db75c7faa1e94f2464787a480e5d613e
-    expect(minSize).to.be.equal(2687377);
-    expect(maxSize).to.be.equal(141837543039377);
+    expect(minSize).toBe(2687377);
+    expect(maxSize).toBe(141837543039377);
   });
 });
 
@@ -24,7 +24,7 @@ describe("container serialization/deserialization field casing(s)", function ()
 
     const result = ssz.phase0.AttesterSlashing.fromJson(json);
     const back = ssz.phase0.AttesterSlashing.toJson(result);
-    expect(back).to.be.deep.equal(json);
+    expect(back).toEqual(json);
   });
 
   it("ProposerSlashing", function () {
@@ -39,6 +39,6 @@ describe("container serialization/deserialization field casing(s)", function ()
 
     const result = ssz.phase0.ProposerSlashing.fromJson(json);
     const back = ssz.phase0.ProposerSlashing.toJson(result);
-    expect(back).to.be.deep.equal(json);
+    expect(back).toEqual(json);
   });
 });

packages/types/vitest.browser.config.ts

@@ -0,0 +1,14 @@
+import {defineConfig, mergeConfig} from "vitest/config";
+import vitestConfig from "../../vitest.base.browser.config";
+
+export default mergeConfig(
+  vitestConfig,
+  defineConfig({
+    test: {
+      globalSetup: ["./test/globalSetup.ts"],
+    },
+    optimizeDeps: {
+      exclude: ["@chainsafe/blst"],
+    },
+  })
+);

packages/types/vitest.config.ts

@@ -0,0 +1,11 @@
+import {defineConfig, mergeConfig} from "vitest/config";
+import vitestConfig from "../../vitest.base.config";
+
+export default mergeConfig(
+  vitestConfig,
+  defineConfig({
+    test: {
+      globalSetup: ["./test/globalSetup.ts"],
+    },
+  })
+);