fix: exercise production evidence asset lookup

src/features/tech-log/adapters/static/evidence-assets.ts

@@ -0,0 +1,25 @@
+export const evidenceAssets = {
+  "fetch-strategy-boundary": {
+    src: "/media/fetch-strategy-boundary.svg",
+    width: 1080,
+    height: 420,
+    triggerLabel: "Fetch Join과 Batch Fetch 비교 다이어그램 크게 보기",
+    dialogLabel: "Fetch Join과 Batch Fetch의 페이징 경계 확대",
+  },
+} as const;
+
+export type SupportedEvidenceKey = keyof typeof evidenceAssets;
+
+export function isSupportedEvidenceKey(
+  key: string,
+): key is SupportedEvidenceKey {
+  return Object.hasOwn(evidenceAssets, key);
+}
+
+export function getEvidenceAsset(key: string) {
+  if (!isSupportedEvidenceKey(key)) {
+    throw new Error(`Unknown local evidence asset: ${key}`);
+  }
+
+  return evidenceAssets[key];
+}

tests/features/tech-log/migration-baseline.test.ts

@@ -4,6 +4,8 @@ import { resolve } from "node:path";
 
 import { describe, expect, it } from "vitest";
 
+import { getEvidenceAsset } from "../../../src/features/tech-log/adapters/static/evidence-assets.ts";
+
 const publicDirectory = resolve(process.cwd(), "public");
 
 const approvedSvgAssets = [
@@ -17,25 +19,6 @@ const approvedSvgAssets = [
   },
 ] as const;
 
-const localEvidenceAssets = {
-  "fetch-strategy-boundary": {
-    src: "/media/fetch-strategy-boundary.svg",
-    width: 1080,
-    height: 420,
-    triggerLabel: "Fetch Join과 Batch Fetch 비교 다이어그램 크게 보기",
-    dialogLabel: "Fetch Join과 Batch Fetch의 페이징 경계 확대",
-  },
-} as const;
-
-function getLocalEvidenceAsset(key: string) {
-  const asset = localEvidenceAssets[key as keyof typeof localEvidenceAssets];
-  if (!asset) {
-    throw new Error(`Unknown local evidence asset: ${key}`);
-  }
-
-  return asset;
-}
-
 function sha256(filePath: string) {
   return createHash("sha256").update(readFileSync(filePath)).digest("hex");
 }
@@ -51,7 +34,7 @@ describe("TechLog migration baseline", () => {
   });
 
   it("resolves the fetch strategy evidence to its published asset contract", () => {
-    expect(getLocalEvidenceAsset("fetch-strategy-boundary")).toEqual({
+    expect(getEvidenceAsset("fetch-strategy-boundary")).toEqual({
       src: "/media/fetch-strategy-boundary.svg",
       width: 1080,
       height: 420,
@@ -61,11 +44,14 @@ describe("TechLog migration baseline", () => {
 
     const evidencePath = resolve(
       publicDirectory,
-      getLocalEvidenceAsset("fetch-strategy-boundary").src.slice(1),
+      getEvidenceAsset("fetch-strategy-boundary").src.slice(1),
     );
     expect(existsSync(evidencePath)).toBe(true);
     expect(sha256(evidencePath)).toBe(
       "b07926823ed77fc200f962a1f64a440e130cefa6bed31144b611612af9b02606",
     );
+    expect(() => getEvidenceAsset("unknown")).toThrow(
+      "Unknown local evidence asset: unknown",
+    );
   });
 });