basic unit tests

test/fixtures/mock-emails.ts

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+/**
+ * Canned Gmail API responses representing one email from each category.
+ * Body text is base64url-encoded to match the real Gmail API format.
+ */
+
+const toBase64Url = (text: string): string =>
+  Buffer.from(text, "utf-8").toString("base64url");
+
+// Category A — Acknowledgement only
+const catABody = [
+  "Dear Steven,",
+  "",
+  "Thank you for your interest in the Senior Software Engineer position at Acme Corp.",
+  "We have received your application and it is currently under review.",
+  "We will contact you if your qualifications match our needs.",
+  "",
+  "Best regards,",
+  "Acme Talent Acquisition",
+].join("\n");
+
+// Category B — Advancement to next step
+const catBBody = [
+  "Hi Steven,",
+  "",
+  "Thanks for applying to the Full Stack Engineer role at Globex Corp.",
+  "We'd love to schedule a phone screen to discuss your background.",
+  "Are you available this Thursday at 2:00 PM CST?",
+  "Please join via Zoom: https://zoom.us/j/123456789",
+  "",
+  "Looking forward to connecting,",
+  "Jane Smith",
+  "Senior Recruiter, Globex Corp",
+  "jane.smith@globexcorp.com",
+  "(555) 867-5309",
+].join("\n");
+
+// Category C — Rejection
+const catCBody = [
+  "Dear Steven,",
+  "",
+  "Thank you for taking the time to interview for the Platform Engineer position at Initech.",
+  "After careful consideration, we have decided to pursue other candidates",
+  "whose experience more closely aligns with our current needs.",
+  "",
+  "We wish you the best in your job search.",
+  "",
+  "Regards,",
+  "Initech Recruiting Team",
+].join("\n");
+
+// Category D — Other / non-job
+const catDBody = [
+  "Your Tailscale subscription payment of $6.00 was unsuccessful.",
+  "Please update your payment method at https://login.tailscale.com/billing.",
+  "",
+  "— Tailscale Billing",
+].join("\n");
+
+const makeHeaders = (from: string, subject: string, date: string) => [
+  { name: "From", value: from },
+  { name: "Subject", value: subject },
+  { name: "Date", value: date },
+  { name: "To", value: "steven@sjdev.co" },
+];
+
+export const MOCK_MESSAGE_LIST = {
+  data: {
+    messages: [
+      { id: "msg-cat-a-001" },
+      { id: "msg-cat-b-001" },
+      { id: "msg-cat-c-001" },
+      { id: "msg-cat-d-001" },
+    ],
+  },
+};
+
+export const MOCK_MESSAGES: Record<string, { data: any }> = {
+  "msg-cat-a-001": {
+    data: {
+      id: "msg-cat-a-001",
+      snippet: "Thank you for your interest in the Senior Software Engineer position...",
+      payload: {
+        headers: makeHeaders(
+          "Acme Talent <talent@acmecorp.com>",
+          "Application Received — Senior Software Engineer",
+          "Mon, 17 Feb 2026 10:00:00 +0000"
+        ),
+        mimeType: "multipart/alternative",
+        parts: [
+          {
+            mimeType: "text/plain",
+            body: { data: toBase64Url(catABody) },
+          },
+          {
+            mimeType: "text/html",
+            body: { data: toBase64Url(`<p>${catABody}</p>`) },
+          },
+        ],
+      },
+    },
+  },
+
+  "msg-cat-b-001": {
+    data: {
+      id: "msg-cat-b-001",
+      snippet: "We'd love to schedule a phone screen...",
+      payload: {
+        headers: makeHeaders(
+          "Jane Smith <jane.smith@globexcorp.com>",
+          "Phone Screen — Full Stack Engineer at Globex Corp",
+          "Tue, 18 Feb 2026 14:30:00 +0000"
+        ),
+        mimeType: "multipart/alternative",
+        parts: [
+          {
+            mimeType: "text/plain",
+            body: { data: toBase64Url(catBBody) },
+          },
+        ],
+      },
+    },
+  },
+
+  "msg-cat-c-001": {
+    data: {
+      id: "msg-cat-c-001",
+      snippet: "We have decided to pursue other candidates...",
+      payload: {
+        headers: makeHeaders(
+          "Initech Recruiting <recruiting@initech.com>",
+          "Update on Your Application — Platform Engineer",
+          "Wed, 19 Feb 2026 09:15:00 +0000"
+        ),
+        mimeType: "text/plain",
+        body: { data: toBase64Url(catCBody) },
+      },
+    },
+  },
+
+  "msg-cat-d-001": {
+    data: {
+      id: "msg-cat-d-001",
+      snippet: "Your Tailscale subscription payment of $6.00 was unsuccessful.",
+      payload: {
+        headers: makeHeaders(
+          "Tailscale Billing <billing@tailscale.com>",
+          "$6.00 payment to Tailscale US Inc. was unsuccessful",
+          "Thu, 20 Feb 2026 17:00:00 +0000"
+        ),
+        mimeType: "text/plain",
+        body: { data: toBase64Url(catDBody) },
+      },
+    },
+  },
+};
+
+export const MOCK_EMPTY_LIST = {
+  data: { messages: undefined },
+};
+
+// Raw body text for assertion comparisons
+export const RAW_BODIES = {
+  "msg-cat-a-001": catABody,
+  "msg-cat-b-001": catBBody,
+  "msg-cat-c-001": catCBody,
+  "msg-cat-d-001": catDBody,
+};