fix(MongoBinaryDownloadUrl): refactor fedora handling to pass through to rhel

but set the mapping to rhel version first, like linux mint to ubuntu.

fixes typegoose#893

Author: hasezoey

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

@@ -336,25 +336,31 @@ export class MongoBinaryDownloadUrl implements MongoBinaryDownloadUrlOpts {
    * @param os LinuxOS Object
    */
   getFedoraVersionString(os: LinuxOS): string {
-    let name = 'rhel';
     const fedoraVer: number = parseInt(os.release, 10);
 
+    const rhelOS: LinuxOS = {
+      os: 'linux',
+      dist: 'rhel',
+      // fallback to 8.0
+      release: '8.0',
+    };
+
     // 36 and onwards dont ship with libcrypto.so.1.1 anymore and need to be manually installed ("openssl1.1")
     // 34 onward dosnt have "compat-openssl10" anymore, and only build from 4.0.24 are available for "rhel80"
     if (fedoraVer >= 34) {
-      name += '80';
+      rhelOS.release = '8.0';
     }
     if (fedoraVer < 34 && fedoraVer >= 19) {
-      name += '70';
+      rhelOS.release = '7.0';
     }
     if (fedoraVer < 19 && fedoraVer >= 12) {
-      name += '62';
+      rhelOS.release = '6.2';
     }
     if (fedoraVer < 12 && fedoraVer >= 6) {
-      name += '55';
+      rhelOS.release = '5.5';
     }
 
-    return name;
+    return this.getRhelVersionString(rhelOS);
   }
 
   /**

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

@@ -1255,6 +1255,22 @@ describe('MongoBinaryDownloadUrl', () => {
             'https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel80-6.0.0.tgz'
           );
         });
+
+        it('fedora 36 & 7.0.13 x86_64', async () => {
+          const du = new MongoBinaryDownloadUrl({
+            platform: 'linux',
+            arch: 'x64',
+            version: '7.0.13',
+            os: {
+              os: 'linux',
+              dist: 'fedora',
+              release: '36',
+            },
+          });
+          expect(await du.getDownloadUrl()).toBe(
+            'https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel8-7.0.13.tgz'
+          );
+        });
       });
 
       // see https://github.com/typegoose/mongodb-memory-server/issues/527