test: clarify source map and worker diagnostics

src/javascript/analysis/JavaScriptAnalysisWorkerServer.test.ts

@@ -159,7 +159,7 @@ it("drains oversized checkpoint admission, reports output failure, and serves th
       reason: "output",
       resource: null,
       limits: null,
-      message: "JavaScript worker admission frame is missing or oversized",
+      message: expect.stringMatching(/admission frame.*missing or oversized/iu),
     });
     expect(await server.next()).toMatchObject({
       kind: "static",
@@ -198,7 +198,7 @@ it("reports missing checkpoint admission as output failure at stdin EOF", async
       id: request.id,
       reason: "output",
       resource: null,
-      message: "JavaScript worker admission frame is missing or oversized",
+      message: expect.stringMatching(/admission frame.*missing or oversized/iu),
     });
     expect((await server.closed)[0]).toBe(0);
   } finally {

src/javascript/sourceMaps/TraceSourceMap.test.ts

@@ -63,8 +63,7 @@ it("uses the same conservative section classification for URL-plus-map and malfo
   expect(malformed).toThrow(
     expect.objectContaining({
       reason: "format",
-      message:
-        "External source-map section URL must be a string. Section path: [0].",
+      message: expect.stringMatching(/section URL.*must be a string.*\[0\]/iu),
     }),
   );
 });
@@ -82,7 +81,7 @@ it("rejects a present non-array sections member through the shared section-list
   expect(malformed).toThrow(
     expect.objectContaining({
       reason: "format",
-      message: "Indexed source-map sections must be an array.",
+      message: expect.stringMatching(/sections.*must be an array/iu),
     }),
   );
 });