feat: initial prototype attempt

test/config.spec.ts

@@ -0,0 +1,71 @@
+/**
+ * @copyright NHCarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+/* eslint-disable vitest/valid-expect -- Test expectations don't need messages */
+/* eslint-disable max-nested-callbacks -- Vitest structure requires nested callbacks */
+
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+describe("config", () => {
+  const originalEnvironment = process.env;
+
+  beforeEach(() => {
+    vi.resetModules();
+    process.env = { ...originalEnvironment };
+  });
+
+  afterEach(() => {
+    process.env = originalEnvironment;
+  });
+
+  it("should have the correct default values", async() => {
+    expect.assertions(5);
+    process.env.GITEA_TOKEN = "test-token";
+    const { config } = await import("../src/config.js");
+
+    expect(config.checkInterval).toBe("0 7 * * *");
+    expect(config.giteaOrg).toBe("nhcarrigan");
+    expect(config.giteaUrl).toBe("https://git.nhcarrigan.com");
+    expect(config.npmRegistryUrl).toBe("https://registry.npmjs.org");
+    expect(config.prBranchPrefix).toBe("dependencies/update-");
+  });
+
+  it("should use GITEA_TOKEN from environment", async() => {
+    expect.assertions(1);
+    process.env.GITEA_TOKEN = "my-secret-token";
+    const { config } = await import("../src/config.js");
+
+    expect(config.giteaToken).toBe("my-secret-token");
+  });
+
+  it("should default giteaToken to empty string when not set", async() => {
+    expect.assertions(1);
+    delete process.env.GITEA_TOKEN;
+    const { config } = await import("../src/config.js");
+
+    expect(config.giteaToken).toBe("");
+  });
+
+  it("should not throw when GITEA_TOKEN is set", async() => {
+    expect.assertions(1);
+    process.env.GITEA_TOKEN = "valid-token";
+    const { validateConfig } = await import("../src/config.js");
+
+    expect(() => {
+      validateConfig();
+    }).not.toThrow();
+  });
+
+  it("should throw when GITEA_TOKEN is empty", async() => {
+    expect.assertions(1);
+    delete process.env.GITEA_TOKEN;
+    const { validateConfig } = await import("../src/config.js");
+
+    expect(() => {
+      validateConfig();
+    }).toThrow("GITEA_TOKEN is required");
+  });
+});