test: tighten server method helper coverage

src/gateway/server-methods/server-methods.test.ts

@@ -221,59 +221,70 @@ describe("injectTimestamp", () => {
 });
 
 describe("timestampOptsFromConfig", () => {
-  it("extracts timezone from config", () => {
-    const opts = timestampOptsFromConfig({
-      agents: {
-        defaults: {
-          userTimezone: "America/Chicago",
-        },
-      },
+  it.each([
+    {
+      name: "extracts timezone from config",
       // oxlint-disable-next-line typescript/no-explicit-any
-    } as any);
-
-    expect(opts.timezone).toBe("America/Chicago");
-  });
-
-  it("falls back gracefully with empty config", () => {
-    // oxlint-disable-next-line typescript/no-explicit-any
-    const opts = timestampOptsFromConfig({} as any);
-
-    expect(opts.timezone).toBeDefined();
+      cfg: { agents: { defaults: { userTimezone: "America/Chicago" } } } as any,
+      expected: "America/Chicago",
+    },
+    {
+      name: "falls back gracefully with empty config",
+      // oxlint-disable-next-line typescript/no-explicit-any
+      cfg: {} as any,
+      expected: Intl.DateTimeFormat().resolvedOptions().timeZone,
+    },
+  ])("$name", ({ cfg, expected }) => {
+    expect(timestampOptsFromConfig(cfg).timezone).toBe(expected);
   });
 });
 
 describe("normalizeRpcAttachmentsToChatAttachments", () => {
-  it("passes through string content", () => {
-    const res = normalizeRpcAttachmentsToChatAttachments([
-      { type: "file", mimeType: "image/png", fileName: "a.png", content: "Zm9v" },
-    ]);
-    expect(res).toEqual([
-      { type: "file", mimeType: "image/png", fileName: "a.png", content: "Zm9v" },
-    ]);
-  });
-
-  it("converts Uint8Array content to base64", () => {
-    const bytes = new TextEncoder().encode("foo");
-    const res = normalizeRpcAttachmentsToChatAttachments([{ content: bytes }]);
-    expect(res[0]?.content).toBe("Zm9v");
+  it.each([
+    {
+      name: "passes through string content",
+      attachments: [{ type: "file", mimeType: "image/png", fileName: "a.png", content: "Zm9v" }],
+      expected: [{ type: "file", mimeType: "image/png", fileName: "a.png", content: "Zm9v" }],
+    },
+    {
+      name: "converts Uint8Array content to base64",
+      attachments: [{ content: new TextEncoder().encode("foo") }],
+      expected: [{ type: undefined, mimeType: undefined, fileName: undefined, content: "Zm9v" }],
+    },
+    {
+      name: "converts ArrayBuffer content to base64",
+      attachments: [{ content: new TextEncoder().encode("bar").buffer }],
+      expected: [{ type: undefined, mimeType: undefined, fileName: undefined, content: "YmFy" }],
+    },
+    {
+      name: "drops attachments without usable content",
+      attachments: [{ content: undefined }, { mimeType: "image/png" }],
+      expected: [],
+    },
+  ])("$name", ({ attachments, expected }) => {
+    expect(normalizeRpcAttachmentsToChatAttachments(attachments)).toEqual(expected);
   });
 });
 
 describe("sanitizeChatSendMessageInput", () => {
-  it("rejects null bytes", () => {
-    expect(sanitizeChatSendMessageInput("before\u0000after")).toEqual({
-      ok: false,
-      error: "message must not contain null bytes",
-    });
-  });
-
-  it("strips unsafe control characters while preserving tab/newline/carriage return", () => {
-    const result = sanitizeChatSendMessageInput("a\u0001b\tc\nd\re\u0007f\u007f");
-    expect(result).toEqual({ ok: true, message: "ab\tc\nd\ref" });
-  });
-
-  it("normalizes unicode to NFC", () => {
-    expect(sanitizeChatSendMessageInput("Cafe\u0301")).toEqual({ ok: true, message: "Café" });
+  it.each([
+    {
+      name: "rejects null bytes",
+      input: "before\u0000after",
+      expected: { ok: false as const, error: "message must not contain null bytes" },
+    },
+    {
+      name: "strips unsafe control characters while preserving tab/newline/carriage return",
+      input: "a\u0001b\tc\nd\re\u0007f\u007f",
+      expected: { ok: true as const, message: "ab\tc\nd\ref" },
+    },
+    {
+      name: "normalizes unicode to NFC",
+      input: "Cafe\u0301",
+      expected: { ok: true as const, message: "Café" },
+    },
+  ])("$name", ({ input, expected }) => {
+    expect(sanitizeChatSendMessageInput(input)).toEqual(expected);
   });
 });