fix(MongoBinaryDownloadUrl): handle cases where patch version is checked and "-latest" was requested

Author: hasezoey

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

@@ -254,7 +254,8 @@ export class MongoBinaryDownloadUrl implements MongoBinaryDownloadUrlOpts {
     if (release >= 11 || ['unstable', 'testing'].includes(os.release)) {
       // Debian 11 is compatible with the binaries for debian 10
       // but does not have binaries for before 5.0.8
-      if (semver.lt(coercedVersion, '5.0.8')) {
+      // and only set to use "debian10" if the requested version is not a latest version
+      if (semver.lt(coercedVersion, '5.0.8') && !testVersionIsLatest(this.version)) {
         log('debian11 detected, but version below 5.0.8 requested, using debian10');
         name += '10';
       } else {
@@ -271,7 +272,7 @@ export class MongoBinaryDownloadUrl implements MongoBinaryDownloadUrlOpts {
     }
 
     if (release >= 10) {
-      if (semver.lt(coercedVersion, '4.2.1')) {
+      if (semver.lt(coercedVersion, '4.2.1') && !testVersionIsLatest(this.version)) {
         throw new KnownVersionIncompatibilityError(
           `Debian ${release}`,
           this.version,
@@ -337,7 +338,7 @@ export class MongoBinaryDownloadUrl implements MongoBinaryDownloadUrlOpts {
         }
         // there are no versions for aarch64 before mongodb 4.4.2
         // Note: version 4.4.2 and 4.4.3 are NOT listed at the list, but are existing; list: https://www.mongodb.com/download-center/community/releases/archive
-        if (semver.lt(coercedVersion, '4.4.2')) {
+        if (semver.lt(coercedVersion, '4.4.2') && !testVersionIsLatest(this.version)) {
           throw new KnownVersionIncompatibilityError(`Rhel ${release}`, this.version, '>=4.4.2');
         }
 
@@ -602,3 +603,8 @@ function regexHelper(regex: RegExp, os: LinuxOS): boolean {
     (!isNullOrUndefined(os.id_like) ? os.id_like.filter((v) => regex.test(v)).length >= 1 : false)
   );
 }
+
+/** Helper to consistently test if a version is a "-latest" version, like "v5.0-latest" */
+function testVersionIsLatest(version: string): boolean {
+  return /^v\d+\.\d+-latest$/.test(version);
+}

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

@@ -490,6 +490,22 @@ describe('MongoBinaryDownloadUrl', () => {
           );
         });
 
+        it('for debian 11 for v5.0-latest', async () => {
+          const du = new MongoBinaryDownloadUrl({
+            platform: 'linux',
+            arch: 'x64',
+            version: 'v5.0-latest',
+            os: {
+              os: 'linux',
+              dist: 'debian',
+              release: '11',
+            },
+          });
+          expect(await du.getDownloadUrl()).toBe(
+            'https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-debian11-v5.0-latest.tgz'
+          );
+        });
+
         it('for debian 11 for 6.0.0', async () => {
           const du = new MongoBinaryDownloadUrl({
             platform: 'linux',
@@ -566,6 +582,22 @@ describe('MongoBinaryDownloadUrl', () => {
           }
         });
 
+        it('should not throw a error for v4.2-latest for debian 10+', async () => {
+          const du = new MongoBinaryDownloadUrl({
+            platform: 'linux',
+            arch: 'x64',
+            version: 'v4.2-latest',
+            os: {
+              os: 'linux',
+              dist: 'debian',
+              release: '10',
+            },
+          });
+          expect(await du.getDownloadUrl()).toBe(
+            'https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-debian10-v4.2-latest.tgz'
+          );
+        });
+
         it('should throw a Error when requesting a version below 4.2.1 for debian 11+ [#554] [KnownVersionIncompatibilityError]', async () => {
           const du = new MongoBinaryDownloadUrl({
             platform: 'linux',
@@ -1087,6 +1119,22 @@ describe('MongoBinaryDownloadUrl', () => {
           }
         });
 
+        it('should not throw a error for arm64 v4.4-latest', async () => {
+          const du = new MongoBinaryDownloadUrl({
+            platform: 'linux',
+            arch: 'arm64',
+            version: 'v4.4-latest',
+            os: {
+              os: 'linux',
+              dist: 'rhel',
+              release: '8.2',
+            },
+          });
+          expect(await du.getDownloadUrl()).toBe(
+            'https://fastdl.mongodb.org/linux/mongodb-linux-aarch64-rhel82-v4.4-latest.tgz'
+          );
+        });
+
         it('should warn when a unhandled RHEL release is used', async () => {
           const consoleWarnSpy = jest.spyOn(console, 'warn').mockImplementationOnce(() => void 0);