Initial commit

packages/core-shared/src/lib/date.test.ts

@@ -0,0 +1,23 @@
+import { describe, expect, it } from "vitest";
+import { toIsoString } from "./date";
+
+describe("toIsoString", () => {
+  it("converts a Date to ISO string", () => {
+    const d = new Date("2026-05-04T12:00:00.000Z");
+    expect(toIsoString(d)).toBe("2026-05-04T12:00:00.000Z");
+  });
+
+  it("passes through an existing ISO string", () => {
+    expect(toIsoString("2026-05-04T12:00:00.000Z")).toBe(
+      "2026-05-04T12:00:00.000Z",
+    );
+  });
+
+  it("returns null for null input", () => {
+    expect(toIsoString(null)).toBeNull();
+  });
+
+  it("returns null for undefined input", () => {
+    expect(toIsoString(undefined)).toBeNull();
+  });
+});

packages/core-shared/src/lib/date.ts

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+export function toIsoString(input: Date | string | null | undefined): string | null {
+  if (input === null || input === undefined) return null;
+  if (input instanceof Date) return input.toISOString();
+  return input;
+}

packages/core-shared/src/lib/env.test.ts

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+import { describe, expect, it, afterEach } from "vitest";
+import { requireEnv } from "./env";
+
+describe("requireEnv", () => {
+  const originalEnv = process.env.SOME_KEY;
+
+  afterEach(() => {
+    if (originalEnv === undefined) delete process.env.SOME_KEY;
+    else process.env.SOME_KEY = originalEnv;
+  });
+
+  it("returns the value when set", () => {
+    process.env.SOME_KEY = "value";
+    expect(requireEnv("SOME_KEY")).toBe("value");
+  });
+
+  it("throws when missing", () => {
+    delete process.env.SOME_KEY;
+    expect(() => requireEnv("SOME_KEY")).toThrow(
+      /Missing required env var: SOME_KEY/,
+    );
+  });
+
+  it("throws when empty string", () => {
+    process.env.SOME_KEY = "";
+    expect(() => requireEnv("SOME_KEY")).toThrow();
+  });
+});

packages/core-shared/src/lib/env.ts

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+export function requireEnv(name: string): string {
+  const value = process.env[name];
+  if (!value) {
+    throw new Error(`Missing required env var: ${name}`);
+  }
+  return value;
+}