backend/conat/test: replace toThrowError with toThrow per Jest v30 migration

Jest v30 removed the toThrowError matcher. Following the official migration
guide, all instances have been replaced with the equivalent toThrow matcher.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: haraldschilly

src/packages/backend/conat/test/core/basic.test.ts

@@ -101,7 +101,7 @@ describe("basic test of publish and subscribe", () => {
     const sub1 = await cn.subscribe(subject);
     await expect(async () => {
       await cn.subscribe(subject, { queue: "xxx" });
-    }).rejects.toThrowError("one queue group");
+    }).rejects.toThrow("one queue group");
 
     sub1.stop();
     // now this works
@@ -259,7 +259,7 @@ describe("basic tests of request/respond", () => {
   it("call the iter server -- test that throws an error", async () => {
     await expect(async () => {
       await callIter(c1, null);
-    }).rejects.toThrowError("is not iterable");
+    }).rejects.toThrow("is not iterable");
   });
 });
 

src/packages/backend/conat/test/core/core-stream-break.test.ts

@@ -65,7 +65,7 @@ describe("stop persist server, create a client, create an ephemeral core-stream,
 
     await expect(async () => {
       await stream.publish("y", { timeout: 100 });
-    }).rejects.toThrowError();
+    }).rejects.toThrow();
 
     try {
       await stream.publish("y", { timeout: 100 });

src/packages/backend/conat/test/core/core-stream.test.ts

@@ -60,7 +60,7 @@ describe("create a client, create an ephemeral core-stream, and do basic tests",
   it("publishing undefined is not allowed", async () => {
     await expect(
       async () => await stream.publish(undefined),
-    ).rejects.toThrowError("must not be 'undefined'");
+    ).rejects.toThrow("must not be 'undefined'");
   });
 
   it("a second client has the same messages", async () => {
@@ -307,7 +307,7 @@ describe("test previousSeq when setting keys, which can be used to ensure consis
   it("tries to change the value using the wrong previousSeq", async () => {
     await expect(async () => {
       await stream.setKv("my", "newval", { previousSeq: 0 });
-    }).rejects.toThrowError("wrong last sequence");
+    }).rejects.toThrow("wrong last sequence");
   });
 
   it("changes the value using the correct previousSeq", async () => {
@@ -398,7 +398,7 @@ describe("test permissions", () => {
     // they give the project_id, not their id.
     await expect(async () => {
       await stream.init();
-    }).rejects.toThrowError("permission denied");
+    }).rejects.toThrow("permission denied");
 
     stream.close();
   });
@@ -415,7 +415,7 @@ describe("test permissions", () => {
     stream.storage.path = "hub/conat2.ipynb";
     await expect(async () => {
       await stream.init();
-    }).rejects.toThrowError("permission denied");
+    }).rejects.toThrow("permission denied");
     stream.close();
 
     stream = new CoreStream({
@@ -429,7 +429,7 @@ describe("test permissions", () => {
     stream.user = { project_id: "00000000-0000-4000-8000-000000000004" };
     await expect(async () => {
       await stream.init();
-    }).rejects.toThrowError("permission denied");
+    }).rejects.toThrow("permission denied");
     stream.close();
 
     stream = new CoreStream({
@@ -442,7 +442,7 @@ describe("test permissions", () => {
     stream.user = { account_id: "00000000-0000-4000-8000-000000000000" };
     await expect(async () => {
       await stream.init();
-    }).rejects.toThrowError("permission denied");
+    }).rejects.toThrow("permission denied");
 
     stream.close();
   });

src/packages/backend/conat/test/core/services.test.ts

@@ -100,7 +100,7 @@ describe("more service tests", () => {
     });
     await expect(async () => {
       await arith.mul(2, 3);
-    }).rejects.toThrowError("no subscribers");
+    }).rejects.toThrow("no subscribers");
   });
 
   it("cleans up", () => {

src/packages/backend/conat/test/core/wait-for-interest.test.ts

@@ -35,7 +35,7 @@ describe("test waitForInterest with request", () => {
   it("request throws an error by default if there is no listener", async () => {
     expect(async () => {
       await client.request("eval.server.com", "2+3");
-    }).rejects.toThrowError("no subscribers");
+    }).rejects.toThrow("no subscribers");
   });
 
   it("requests with waitForInterest set and sees it work", async () => {
@@ -54,7 +54,7 @@ describe("test waitForInterest with requestMany", () => {
   it("request throws an error by default if there is no listener", async () => {
     expect(async () => {
       await client.requestMany("arith.server.com", [2, 3]);
-    }).rejects.toThrowError("no subscribers");
+    }).rejects.toThrow("no subscribers");
   });
 
   it("requestMany with waitForInterest set and sees it work", async () => {

src/packages/backend/conat/test/server/limits.test.ts

@@ -27,7 +27,7 @@ describe("test the per user subscription limit", () => {
   it("creates another subscription and gets an error", async () => {
     await expect(async () => {
       await client.sub("sub3");
-    }).rejects.toThrowError("limit");
+    }).rejects.toThrow("limit");
   });
 
   it("cleans up", () => {

src/packages/backend/conat/test/service.test.ts

@@ -38,7 +38,7 @@ describe("create a service and test it out", () => {
     s.close();
     await expect(async () => {
       await callConatService({ service: "echo", mesg: "hi", timeout: 250 });
-    }).rejects.toThrowError("time");
+    }).rejects.toThrow("time");
   });
 });
 
@@ -275,7 +275,7 @@ describe("create a slow service and check that the timeout parameter works", ()
         mesg: 5000,
         timeout: 75,
       });
-    }).rejects.toThrowError("imeout");
+    }).rejects.toThrow("imeout");
   });
 
   it("clean up", async () => {

src/packages/backend/conat/test/sync/akv.test.ts

@@ -91,7 +91,7 @@ describe("test interop with a dkv", () => {
   it("check sqlite query fails", async () => {
     await expect(async () => {
       await akv.sqlite("SELECT count(*) AS n FROM messages");
-    }).rejects.toThrowError("sqlite command not currently supported");
+    }).rejects.toThrow("sqlite command not currently supported");
   });
 
   //   it("check sqlite query works", async () => {

src/packages/backend/conat/test/sync/limits.test.ts

@@ -246,7 +246,7 @@ describe("create a dstream with limit on the total number of messages, and confi
     s.publish("x".repeat(70));
     await expect(async () => {
       await s.stream.publish("x".repeat(150));
-    }).rejects.toThrowError("max_msg_size");
+    }).rejects.toThrow("max_msg_size");
     await s.config({ max_msg_size: 200 });
     s.publish("x".repeat(150));
     await s.config({ max_msg_size: -1 });