chore: install vitest

package.json

@@ -121,6 +121,7 @@
     "turbo": "2.1.2",
     "typescript": "~4.9.5",
     "verdaccio": "5.25.0",
+    "vitest": "0.34.6",
     "webpack": "5.76.0",
     "webpack-cli": "4.10.0",
     "yargs": "17.5.1",

packages/core/integ/request-handlers/request-handlers.integ.spec.ts

@@ -1,3 +1,5 @@
+import { test as it, describe, expect } from "vitest";
+
 import { Kinesis } from "@aws-sdk/client-kinesis";
 import { S3 } from "@aws-sdk/client-s3";
 import { TranscribeStreaming } from "@aws-sdk/client-transcribe-streaming";

packages/core/package.json

@@ -12,8 +12,8 @@
     "lint": "node ./scripts/lint.js",
     "clean": "rimraf ./dist-* && rimraf *.tsbuildinfo",
     "extract:docs": "api-extractor run --local",
-    "test": "jest",
-    "test:integration": "jest -c jest.config.integ.js"
+    "test": "vitest run",
+    "test:integration": "vitest run -c vitest.config.integ.ts"
   },
   "main": "./dist-cjs/index.js",
   "module": "./dist-es/index.js",

packages/core/src/submodules/account-id-endpoint/AccountIdEndpointModeConstants.spec.ts

@@ -1,3 +1,5 @@
+import { describe, expect, test as it } from "vitest";
+
 import { validateAccountIdEndpointMode } from "./AccountIdEndpointModeConstants";
 
 describe("validateAccountIdEndpointMode", () => {

packages/core/src/submodules/account-id-endpoint/NodeAccountIdEndpointModeConfigOptions.spec.ts

@@ -1,3 +1,5 @@
+import { afterEach, beforeEach, describe, expect, test as it, vi } from "vitest";
+
 import { DEFAULT_ACCOUNT_ID_ENDPOINT_MODE } from "./AccountIdEndpointModeConstants";
 import {
   CONFIG_ACCOUNT_ID_ENDPOINT_MODE,
@@ -9,7 +11,7 @@ describe("NODE_ACCOUNT_ID_ENDPOINT_MODE_CONFIG_OPTIONS", () => {
   const originalEnv = process.env;
 
   beforeEach(() => {
-    jest.resetModules();
+    vi.resetModules();
     process.env = { ...originalEnv };
   });
 

packages/core/src/submodules/client/emitWarningIfUnsupportedVersion.spec.ts

@@ -1,17 +1,18 @@
+import { afterEach, beforeEach, describe, expect, test as it, vi } from "vitest";
+
+import { emitWarningIfUnsupportedVersion, state } from "./emitWarningIfUnsupportedVersion";
+
 describe("emitWarningIfUnsupportedVersion", () => {
-  let emitWarningIfUnsupportedVersion: any;
   const emitWarning = process.emitWarning;
   const supportedVersion = "18.0.0";
 
-  beforeEach(() => {
-    const module = require("./emitWarningIfUnsupportedVersion");
-    emitWarningIfUnsupportedVersion = module.emitWarningIfUnsupportedVersion;
-  });
+  beforeEach(() => {});
 
   afterEach(() => {
-    jest.clearAllMocks();
-    jest.resetModules();
+    vi.clearAllMocks();
+    vi.resetModules();
     process.emitWarning = emitWarning;
+    state.warningEmitted = false;
   });
 
   describe(`emits warning for Node.js <${supportedVersion}`, () => {
@@ -31,7 +32,7 @@ describe("emitWarningIfUnsupportedVersion", () => {
         [getPreviousMajorVersion(major), 0, 0],
       ].map((arr) => `v${arr.join(".")}`)
     )(`%s`, async (unsupportedVersion) => {
-      process.emitWarning = jest.fn();
+      process.emitWarning = vi.fn() as any;
       emitWarningIfUnsupportedVersion(unsupportedVersion);
 
       // Verify that the warning was emitted.
@@ -62,7 +63,7 @@ More information can be found at: https://a.co/74kJMmI`
         [major + 1, 0, 0],
       ].map((arr) => `v${arr.join(".")}`)
     )(`%s`, async (unsupportedVersion) => {
-      process.emitWarning = jest.fn();
+      process.emitWarning = vi.fn() as any;
       emitWarningIfUnsupportedVersion(unsupportedVersion);
       expect(process.emitWarning).not.toHaveBeenCalled();
     });

packages/core/src/submodules/client/emitWarningIfUnsupportedVersion.ts

@@ -1,5 +1,7 @@
 // Stores whether the warning was already emitted.
-let warningEmitted = false;
+export const state = {
+  warningEmitted: false,
+};
 
 /**
  * @internal
@@ -10,8 +12,8 @@ let warningEmitted = false;
  * @param version - The Node.js version string.
  */
 export const emitWarningIfUnsupportedVersion = (version: string) => {
-  if (version && !warningEmitted && parseInt(version.substring(1, version.indexOf("."))) < 18) {
-    warningEmitted = true;
+  if (version && !state.warningEmitted && parseInt(version.substring(1, version.indexOf("."))) < 18) {
+    state.warningEmitted = true;
     process.emitWarning(
       `NodeDeprecationWarning: The AWS SDK for JavaScript (v3) will
 no longer support Node.js 16.x on January 6, 2025.

packages/core/src/submodules/client/setCredentialFeature.spec.ts

@@ -1,4 +1,5 @@
 import { AttributedAwsCredentialIdentity } from "@aws-sdk/types";
+import { describe, expect, test as it } from "vitest";
 
 import { setCredentialFeature } from "./setCredentialFeature";
 

packages/core/src/submodules/client/setFeature.spec.ts

@@ -1,4 +1,5 @@
 import { AwsHandlerExecutionContext } from "@aws-sdk/types";
+import { describe, test as it } from "vitest";
 
 import { setFeature } from "./setFeature";
 

packages/core/src/submodules/httpAuthSchemes/aws_sdk/AwsSdkSigV4Signer.spec.ts

@@ -1,3 +1,5 @@
+import { describe, expect, test as it } from "vitest";
+
 import { AwsSdkSigV4Signer } from "./AwsSdkSigV4Signer";
 
 describe(AwsSdkSigV4Signer.name, () => {

packages/core/src/submodules/httpAuthSchemes/aws_sdk/resolveAwsSdkSigV4AConfig.spec.ts

@@ -1,3 +1,5 @@
+import { describe, expect, test as it } from "vitest";
+
 import { resolveAwsSdkSigV4AConfig } from "./resolveAwsSdkSigV4AConfig";
 
 describe(resolveAwsSdkSigV4AConfig.name, () => {

packages/core/src/submodules/httpAuthSchemes/utils/getSkewCorrectedDate.spec.ts

@@ -1,14 +1,16 @@
+import { afterEach, beforeEach, describe, expect, test as it, vi } from "vitest";
+
 import { getSkewCorrectedDate } from "./getSkewCorrectedDate";
 
 describe(getSkewCorrectedDate.name, () => {
   const mockDateNow = Date.now();
 
   beforeEach(() => {
-    jest.spyOn(Date, "now").mockReturnValue(mockDateNow);
+    vi.spyOn(Date, "now").mockReturnValue(mockDateNow);
   });
 
   afterEach(() => {
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   it.each([-100000, -100, 0, 100, 100000])("systemClockOffset: %d", (systemClockOffset) => {

packages/core/src/submodules/httpAuthSchemes/utils/getUpdatedSystemClockOffset.spec.ts

@@ -1,28 +1,30 @@
+import { afterEach, beforeEach, describe, expect, test as it, vi } from "vitest";
+
 import { getUpdatedSystemClockOffset } from "./getUpdatedSystemClockOffset";
 import { isClockSkewed } from "./isClockSkewed";
 
-jest.mock("./isClockSkewed");
+vi.mock("./isClockSkewed");
 
 describe(getUpdatedSystemClockOffset.name, () => {
   // Mock ServerTime is accurate to last second, to remove milliseconds information.
   const mockClockTime = new Date(Math.floor(Date.now() / 1000) * 1000);
   const mockSystemClockOffset = 100;
 
   afterEach(() => {
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   it("returns passed systemClockOffset when clock is not skewed", () => {
-    (isClockSkewed as jest.Mock).mockReturnValue(false);
+    vi.mocked(isClockSkewed).mockReturnValue(false);
     expect(getUpdatedSystemClockOffset(mockClockTime.toString(), mockSystemClockOffset)).toEqual(mockSystemClockOffset);
   });
 
   describe("returns difference between serverTime and current time when clock is skewed", () => {
     const dateDotNowFn = Date.now;
 
     beforeEach(() => {
-      (isClockSkewed as jest.Mock).mockReturnValue(true);
-      jest.spyOn(Date, "now").mockReturnValueOnce(mockClockTime.getTime());
+      vi.mocked(isClockSkewed).mockReturnValue(true);
+      vi.spyOn(Date, "now").mockReturnValueOnce(mockClockTime.getTime());
     });
 
     afterEach(() => {

packages/core/src/submodules/httpAuthSchemes/utils/isClockSkewed.spec.ts

@@ -1,19 +1,21 @@
+import { afterEach, beforeEach, describe, expect, test as it, vi } from "vitest";
+
 import { getSkewCorrectedDate } from "./getSkewCorrectedDate";
 import { isClockSkewed } from "./isClockSkewed";
 
-jest.mock("./getSkewCorrectedDate");
+vi.mock("./getSkewCorrectedDate");
 
 describe(isClockSkewed.name, () => {
   const mockSystemClockOffset = 100;
   const mockSkewCorrectedDate = new Date();
 
   beforeEach(() => {
-    (getSkewCorrectedDate as jest.Mock).mockReturnValue(mockSkewCorrectedDate);
+    vi.mocked(getSkewCorrectedDate).mockReturnValue(mockSkewCorrectedDate);
   });
 
   afterEach(() => {
     expect(getSkewCorrectedDate).toHaveBeenCalledWith(mockSystemClockOffset);
-    jest.clearAllMocks();
+    vi.clearAllMocks();
   });
 
   describe("returns true for time difference >=300000", () => {

packages/core/src/submodules/protocols/coercing-serializers.spec.ts

@@ -1,3 +1,5 @@
+import { afterAll, beforeAll, describe, expect, test as it } from "vitest";
+
 import { _toBool, _toNum, _toStr } from "./coercing-serializers";
 
 const consoleWarn = console.warn;

packages/core/src/submodules/protocols/json/awsExpectUnion.spec.ts

@@ -1,3 +1,5 @@
+import { describe, expect, test as it } from "vitest";
+
 import { awsExpectUnion } from "./awsExpectUnion";
 
 describe(awsExpectUnion.name, () => {

packages/core/src/submodules/protocols/xml/parseXmlBody.spec.ts

@@ -1,5 +1,6 @@
 import type { SerdeContext } from "@smithy/types";
 import { toUtf8 } from "@smithy/util-utf8";
+import { describe, expect, test as it } from "vitest";
 
 import { parseXmlBody } from "./parseXmlBody";
 

packages/core/vitest.config.integ.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    include: ["**/*.integ.spec.{ts,js}"],
+    environment: "node",
+  },
+});

packages/core/vitest.config.ts

@@ -0,0 +1,9 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    exclude: ["**/*.{integ,e2e,browser}.spec.{ts,js}"],
+    include: ["**/*.spec.{ts,js}"],
+    environment: "node",
+  },
+});

scripts/validation/vitest-validation.js

@@ -0,0 +1,102 @@
+const fs = require("fs");
+const path = require("path");
+const walk = require("../utils/walk");
+
+const paths = [path.join(__dirname, "..", "..", "packages", "core")];
+
+(async () => {
+  for (const folder of paths) {
+    const pkgJson = require(path.join(folder, "package.json"));
+
+    if (pkgJson.scripts.test) {
+      if (pkgJson.scripts.test.includes("jest")) {
+        console.log("setting unit test to vitest");
+
+        pkgJson.scripts.test = "vitest run";
+        fs.rmSync(path.join(folder, "jest.config.js"));
+        fs.writeFileSync(
+          path.join(folder, "vitest.config.ts"),
+          `import { defineConfig } from "vitest/config";
+
+  export default defineConfig({
+    test: {
+      exclude: ["**/*.{integ,e2e,browser}.spec.{ts,js}"],
+      include: ["**/*.spec.{ts,js}"],
+      environment: "node",
+    },
+  });
+  `
+        );
+      }
+    }
+
+    for (const testType of ["integ", "e2e"]) {
+      const script = testType === "integ" ? "integration" : testType;
+      if (pkgJson.scripts[`test:${script}`]) {
+        if (pkgJson.scripts[`test:${script}`].includes("jest")) {
+          console.log(`setting ${testType} test to vitest`);
+
+          pkgJson.scripts[`test:${script}`] = `vitest run -c vitest.config.${testType}.ts`;
+          fs.rmSync(path.join(folder, `jest.config.${testType}.js`));
+          fs.writeFileSync(
+            path.join(folder, `vitest.config.${testType}.ts`),
+            `import { defineConfig } from "vitest/config";
+
+    export default defineConfig({
+      test: {
+        include: ["**/*.${testType}.spec.{ts,js}"],
+        environment: "node",
+      },
+    });
+    `
+          );
+        }
+      }
+    }
+
+    fs.writeFileSync(path.join(folder, "package.json"), JSON.stringify(pkgJson, null, 2) + "\n");
+
+    for await (const file of walk(path.join(folder))) {
+      if (file.endsWith(".spec.ts")) {
+        let contents = fs.readFileSync(file, "utf-8");
+
+        const namespaces = {
+          jest: "vi",
+        };
+
+        const functionCalls = {
+          beforeEach: "beforeEach",
+          beforeAll: "beforeAll",
+          afterEach: "afterEach",
+          afterAll: "afterAll",
+          describe: "describe",
+          expect: "expect",
+        };
+
+        const imports = ["test as it"];
+
+        contents = contents.replace(/\((\w+) as (jest|vi).Mock\)/g, "vi.mocked($1)");
+
+        for (const [old, _new] of Object.entries(namespaces)) {
+          if (contents.includes(old + ".") || contents.includes(_new + ".")) {
+            imports.push(_new);
+            contents = contents.replace(new RegExp(old + "\\.", "g"), _new + ".");
+          }
+        }
+
+        for (const [old, _new] of Object.entries(functionCalls)) {
+          if (contents.includes(old + "(") || contents.includes(_new + "(")) {
+            if (!_new.includes(".")) {
+              imports.push(_new);
+            }
+          }
+        }
+
+        contents = contents.replace(/import {(.*?)} from "(vitest|vtestest)";/g, "");
+        contents = `import { ${imports.join(", ")} } from "vitest";\n\n` + contents;
+
+        fs.writeFileSync(file, contents);
+      }
+    }
+  }
+})();

vite.workspace.ts

@@ -0,0 +1 @@
+export default ["{packages,clients,lib,private}/*/vitest.config.{e2e,integ,browser}.ts"];