fix: tune tmp dir opts, add debug info, add test for 4.0.3

Related #89

package.json

@@ -27,6 +27,7 @@
   "devDependencies": {
     "@babel/cli": "^7.0.0",
     "@babel/core": "^7.0.0",
+    "@babel/node": "^7.0.0",
     "@babel/plugin-proposal-class-properties": "^7.0.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
     "@babel/plugin-proposal-optional-chaining": "^7.0.0",

src/MongoMemoryServer.js

@@ -112,7 +112,12 @@ export default class MongoMemoryServer {
     if (instOpts.dbPath) {
       data.dbPath = instOpts.dbPath;
     } else {
-      tmpDir = tmp.dirSync({ prefix: 'mongo-mem-', unsafeCleanup: true });
+      tmpDir = tmp.dirSync({
+        prefix: 'mongo-mem-',
+        unsafeCleanup: true,
+        discardDescriptor: true,
+        mode: '0755',
+      });
       data.dbPath = tmpDir.name;
     }
 

src/util/MongoBinary.js

@@ -34,8 +34,6 @@ export default class MongoBinary {
           : false,
     };
 
-    const { downloadDir, platform, arch, version } = Object.assign({}, defaultOptions, opts);
-
     let debug;
     if (opts.debug) {
       if (opts.debug.call && typeof opts.debug === 'function' && opts.debug.apply) {
@@ -47,6 +45,11 @@ export default class MongoBinary {
       debug = (msg: string) => {}; // eslint-disable-line
     }
 
+    const options = { ...defaultOptions, ...opts };
+    debug(`MongoBinary options: ${JSON.stringify(options)}`);
+
+    const { downloadDir, platform, arch, version } = options;
+
     if (this.cache[version]) {
       debug(`MongoBinary: found cached binary path for ${version}`);
     } else {

src/util/MongoInstance.js

@@ -168,6 +168,8 @@ export default class MongodbInstance {
       this.instanceFailed('Data directory not found');
     } else if (/shutting down with code/i.test(log)) {
       this.instanceFailed('Mongod shutting down');
+    } else if (/\*\*\*aborting after/i.test(log)) {
+      this.instanceFailed('Mongod internal error');
     }
   }
 }

src/util/__tests__/MongoInstance-test.js

@@ -137,4 +137,15 @@ describe('MongoInstance', () => {
     await mongod.kill();
     expect(isPidRunning(pid)).toBeFalsy();
   });
+
+  it('should work with mongodb 4.0.3', async () => {
+    const mongod = await MongoInstance.run({
+      instance: { port: 27445, dbPath: tmpDir.name },
+      binary: { version: '4.0.3' },
+      debug: true,
+    });
+    const pid: any = mongod.getPid();
+    expect(pid).toBeGreaterThan(0);
+    await mongod.kill();
+  });
 });