Init tests; give up on tsc for now

.eslintrc.yml

@@ -2,10 +2,14 @@ extends: [airbnb-base, plugin:prettier/recommended]
 env:
   es2023: true
   node: true
+  jest: true
 parserOptions:
   ecmaVersion: latest
   sourceType: module
 rules:
   no-console: off
   import/prefer-default-export: off
-  import/extensions: [error, always]
+  import/extensions:
+    - error
+    - always
+    - mjs: never

jest.config.mjs

@@ -0,0 +1,3 @@
+export default {
+  testRegex: "test.mjs$",
+};

lib/util.mjs

@@ -0,0 +1,18 @@
+/**
+ * Parse string to date (or arrays of strings)
+ */
+export function parseDate(str) {
+  if (Array.isArray(str)) {
+    return str.map((s) => parseDate(s));
+  }
+
+  if (str) {
+    const date = new Date(str);
+    if (!date.getTime()) {
+      throw new Error(`Invalid date input: ${str}`);
+    }
+    return date;
+  }
+
+  return null;
+}

lib/util.test.mjs

@@ -0,0 +1,22 @@
+import { parseDate } from "./util";
+
+describe("util", () => {
+  describe("parseDate", () => {
+    test("parses strings", () => {
+      expect(parseDate("2022-04-05")).toEqual(new Date("2022-04-05"));
+      expect(parseDate(["2022-04-05"])).toEqual([new Date("2022-04-05")]);
+    });
+
+    test("returns null for blank values", () => {
+      expect(parseDate(null)).toBeNull();
+      expect(parseDate("")).toBeNull();
+      expect(parseDate([""])).toEqual([null]);
+    });
+
+    test("throws errors for bad dates", () => {
+      expect(() => parseDate("whatev")).toThrow(/invalid date input/i);
+      expect(() => parseDate(["whatev"])).toThrow(/invalid date input/i);
+      expect(() => parseDate("2024-99-99")).toThrow(/invalid date input/i);
+    });
+  });
+});

package.json

@@ -9,14 +9,14 @@
   },
   "private": "true",
   "scripts": {
-    "lint": "npm run lint-prettier && npm run lint-es && npm run lint-ts",
+    "lint": "npm run lint-prettier && npm run lint-es",
     "lint-prettier": "npx prettier --check **/*.{json,yml}",
     "lint-es": "npx eslint '**/*.{js,mjs}'",
     "lint-ts": "npx tsc",
     "lint-fix": "npm run lint-fix-prettier && npm run lint-fix-es",
     "lint-fix-prettier": "npx prettier --check **/*.{json,yml} --write",
     "lint-fix-es": "npx eslint --fix '**/*.{js,mjs}'",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "NODE_OPTIONS=\"$NODE_OPTIONS --experimental-vm-modules\" npx jest"
   },
   "repository": {
     "type": "git",
@@ -34,13 +34,20 @@
   },
   "homepage": "https://github.com/PRX/dovetail-cdn-usage#readme",
   "devDependencies": {
+    "@aws-sdk/client-athena": "^3.567.0",
+    "@types/jest": "^29.5.12",
     "eslint": "^8.57.0",
     "eslint-config-airbnb-base": "*",
     "eslint-config-prettier": "*",
     "eslint-plugin-import": "*",
     "eslint-plugin-jest": "*",
     "eslint-plugin-prettier": "*",
+    "jest": "^29.7.0",
     "prettier": "^3.2.5",
     "typescript": "^5.4.5"
+  },
+  "dependencies": {
+    "@google-cloud/bigquery": "^7.6.1",
+    "lambda-log": "^3.1.0"
   }
 }