fix(MongoBinaryDownloadUrl): translate ubuntu 2104 to 2004

fixes #582

Author: hasezoey

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

@@ -422,6 +422,12 @@ export class MongoBinaryDownloadUrl implements MongoBinaryDownloadUrlOpts {
       return 'ubuntu1804';
     }
 
+    // there are not binaries for ubuntu 21.04, so defaulting to one version below for now
+    // see https://github.com/nodkz/mongodb-memory-server/issues/582
+    if (ubuntuYear >= 21) {
+      return 'ubuntu2004';
+    }
+
     // the "04" version always exists for ubuntu, use that as default
     return `ubuntu${ubuntuYear || 14}04`;
   }

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

@@ -717,6 +717,17 @@ describe('MongoBinaryDownloadUrl', () => {
       ).toBe('ubuntu1804');
       downloadUrl.version = oldMongoVersion;
     });
+
+    it('should return a archive name for Ubuntu 21.04 using 2004', () => {
+      downloadUrl.version = '5.0.3';
+      expect(
+        downloadUrl.getUbuntuVersionString({
+          os: 'linux',
+          dist: 'Ubuntu Linux',
+          release: '21.04',
+        })
+      ).toBe('ubuntu2004');
+    });
   });
 
   describe('getDebianVersionString()', () => {