test: cover error model and unauth order create

tests/errors.test.ts

@@ -0,0 +1,29 @@
+import { isApiError, toApiError } from "@/lib/errors"
+import { describe, expect, it } from "vitest"
+
+describe("lib/errors", () => {
+  describe("toApiError", () => {
+    it("passes through {code,msg} ApiError", () => {
+      const err = { code: 400, msg: "bad request" }
+      expect(isApiError(err)).toBe(true)
+
+      try {
+        throw err
+      } catch (e) {
+        expect(toApiError(e)).toBe(err)
+      }
+    })
+
+    it("converts Error to safe {code,msg}", () => {
+      expect(toApiError(new Error("x"))).toEqual({ code: 500, msg: "x" })
+    })
+
+    it("converts string to safe {code,msg}", () => {
+      expect(toApiError("x")).toEqual({ code: 500, msg: "x" })
+    })
+
+    it("converts unknown input to safe {code,msg}", () => {
+      expect(toApiError(null)).toEqual({ code: 500, msg: "Unknown error" })
+    })
+  })
+})