fix(errors::UnexpectedCloseError): add extra message on SIGILL

re #693
re #692
re #687

Author: hasezoey

packages/mongodb-memory-server-core/src/util/__tests__/MongoInstance.test.ts

@@ -341,6 +341,19 @@ describe('MongodbInstance', () => {
       }
     });
 
+    it('"closeHandler" should emit "instanceError" with extra information on "SIGILL"', () => {
+      // test SIGILL
+      mongod.closeHandler(null, 'SIGILL');
+
+      expect(events.size).toEqual(2);
+      expect(events.get(MongoInstanceEvents.instanceClosed)).toEqual([null, 'SIGILL']);
+
+      const event = events.get(MongoInstanceEvents.instanceError)?.[0];
+      expect(event).toBeInstanceOf(UnexpectedCloseError);
+      assertIsError(event); // has to be used, because there is not typeguard from "expect(variable).toBeInstanceOf"
+      expect(event.message).toMatchSnapshot();
+    });
+
     it('"closeHandler" should emit "instanceError" with non-0 or non-12 code', () => {
       // test code non-0
       {

packages/mongodb-memory-server-core/src/util/__tests__/__snapshots__/MongoInstance.test.ts.snap

@@ -8,6 +8,11 @@ exports[`MongodbInstance prepareCommandArgs should throw an error if no port is
 
 exports[`MongodbInstance test events "closeHandler" should emit "instanceClosed" 1`] = `"Instance closed unexpectedly with code \\"null\\" and signal \\"SIG\\""`;
 
+exports[`MongodbInstance test events "closeHandler" should emit "instanceError" with extra information on "SIGILL" 1`] = `
+"Instance closed unexpectedly with code \\"null\\" and signal \\"SIGILL\\"
+The Process Exited with SIGILL, which mean illegal instruction, which is commonly thrown in mongodb 5.0+ when not having AVX available on the CPU"
+`;
+
 exports[`MongodbInstance test events "closeHandler" should emit "instanceError" with non-0 or non-12 code 1`] = `"Instance closed unexpectedly with code \\"1\\" and signal \\"null\\""`;
 
 exports[`MongodbInstance test events "closeHandler" should emit "instanceError" with non-0 or non-12 code 2`] = `"Instance closed unexpectedly with code \\"null\\" and signal \\"SIG\\""`;

packages/mongodb-memory-server-core/src/util/errors.ts

@@ -178,6 +178,11 @@ export class UnexpectedCloseError extends Error {
     super();
 
     this.message = `Instance closed unexpectedly with code "${code}" and signal "${signal}"`;
+
+    if (signal == 'SIGILL') {
+      this.message +=
+        '\nThe Process Exited with SIGILL, which mean illegal instruction, which is commonly thrown in mongodb 5.0+ when not having AVX available on the CPU';
+    }
   }
 }