test(MongoBinaryDownloadUrl): add test for debian 11 for mongodb 4.2.1

fixes #553

Author: hasezoey

docs/guides/supported-systems.md

@@ -60,7 +60,7 @@ For Arm64 MongoDB only provides binaries for `ubuntu1604`
 
 (uses mongodb's `debian` release)<br/>
 Lowest supported Distribution version is `71`<br/>
-Highest version is `10`<br/>
+Highest version is `11`<br/>
 Default version is `10` (when in `unstable` or `testing`, otherwise none)
 
 ### Fedora

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

@@ -189,6 +189,22 @@ describe('MongoBinaryDownloadUrl', () => {
           );
         });
 
+        it('for debian 11 for 4.2.1 (using debian 10 binaries)', async () => {
+          const du = new MongoBinaryDownloadUrl({
+            platform: 'linux',
+            arch: 'x64',
+            version: '4.2.1',
+            os: {
+              os: 'linux',
+              dist: 'debian',
+              release: '11',
+            },
+          });
+          expect(await du.getDownloadUrl()).toBe(
+            'https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-debian10-4.2.1.tgz'
+          );
+        });
+
         it('should throw a Error when requesting a version below 4.2.1 for debian 10+ [#554] [KnownVersionIncompatibilityError]', async () => {
           const du = new MongoBinaryDownloadUrl({
             platform: 'linux',