feat: centralize application framework primitives

packages/core/test/pagination.test.ts

@@ -0,0 +1,17 @@
+import { expect, test } from "bun:test";
+import { createContext } from "../src/index.ts";
+
+test("context pagination applies defaults, bounds and cursor parsing", () => {
+  const request = new Request("https://example.test/items?limit=500&cursor=next-1");
+  const ctx = createContext(request, new URL(request.url));
+  expect(ctx.pagination({ defaultLimit: 25, maxLimit: 100 })).toEqual({
+    limit: 100,
+    cursor: "next-1",
+  });
+});
+
+test("context pagination rejects invalid limits", () => {
+  const request = new Request("https://example.test/items?limit=-2");
+  const ctx = createContext(request, new URL(request.url));
+  expect(ctx.pagination()).toEqual({ limit: 25, cursor: undefined });
+});

packages/core/test/transaction-cookie.test.ts

@@ -0,0 +1,24 @@
+import { expect, test } from "bun:test";
+import { createContext, withContextHeaders } from "../src/index.ts";
+
+test("transaction cookies preserve policy when consumed and delete exactly once", () => {
+  const firstRequest = new Request("https://example.test/oauth");
+  const first = createContext(firstRequest, new URL(firstRequest.url));
+  first.cookies.transaction<{ state: string }>("oauth").set({ state: "välue" });
+  const issued = withContextHeaders(first, new Response()).headers.get("set-cookie")!;
+  expect(issued).toContain("HttpOnly");
+  expect(issued).toContain("SameSite=Lax");
+  expect(issued).toContain("Secure");
+
+  const pair = issued.split(";", 1)[0]!;
+  const callbackRequest = new Request("https://example.test/callback", {
+    headers: { cookie: pair },
+  });
+  const callback = createContext(callbackRequest, new URL(callbackRequest.url));
+  expect(callback.cookies.transaction<{ state: string }>("oauth").consume()).toEqual({
+    state: "välue",
+  });
+  const consumed = withContextHeaders(callback, new Response()).headers.get("set-cookie")!;
+  expect(consumed).toContain("Max-Age=0");
+  expect(consumed).toContain("Path=/");
+});