Fix MongoDB container excessive CPU usage (testcontainers#1146)

Author: digital88

.prettierrc

@@ -1,5 +1,8 @@
 {
   "printWidth": 120,
   "trailingComma": "es5",
-  "plugins": ["prettier-plugin-organize-imports"]
-}
+  "plugins": [
+    "prettier-plugin-organize-imports"
+  ],
+  "endOfLine": "auto"
+}

packages/modules/mongodb/src/mongodb-container.ts

@@ -49,27 +49,36 @@ export class MongoDBContainer extends GenericContainer {
 
   private withWaitForRsHealthCheck(): this {
     return this.withHealthCheck({
-      test: [
-        "CMD-SHELL",
-        this.buildMongoEvalCommand(
-          `'try { rs.initiate(); } catch (e){} while (db.runCommand({isMaster: 1}).ismaster==false) { sleep(100); }'`
-        ),
-      ],
-      interval: 250,
+      test: ["CMD-SHELL", this.buildMongoEvalCommand(this.getRsInitCmd())],
+      interval: 5000,
       timeout: 60000,
       retries: 1000,
     });
   }
 
   private buildMongoEvalCommand(command: string) {
-    const useMongosh = satisfies(this.imageName.tag, ">=5.0.0");
     const args = [];
-    if (useMongosh) args.push("mongosh");
+    if (this.isV5OrLater()) args.push("mongosh");
     else args.push("mongo", "admin");
     if (this.username && this.password) args.push("-u", this.username, "-p", this.password);
     args.push("--quiet", "--eval", command);
     return args.join(" ");
   }
+
+  private getRsInitCmd() {
+    if (this.isV5OrLater())
+      return `'try { rs.status(); } catch (e) { rs.initiate(); } while (db.runCommand({isMaster: 1}).ismaster==false) { sleep(100); }'`;
+    else
+      return `'try { rs.initiate(); } catch (e) {} while (db.runCommand({isMaster: 1}).ismaster==false) { sleep(100); }'`;
+  }
+
+  private isV5OrLater() {
+    try {
+      return satisfies(this.imageName.tag, ">=5.0.0");
+    } catch {
+      return false;
+    }
+  }
 }
 
 export class StartedMongoDBContainer extends AbstractStartedContainer {

packages/testcontainers/src/utils/test-helper.ts

@@ -2,6 +2,7 @@ import { GetEventsOptions, ImageInspectInfo } from "dockerode";
 import { createServer, Server } from "http";
 import { createSocket } from "node:dgram";
 import fs from "node:fs";
+import { EOL } from "node:os";
 import path from "node:path";
 import { Readable } from "stream";
 import { Agent, request } from "undici";
@@ -14,7 +15,7 @@ import { StartedTestContainer } from "../test-container";
 export const getImage = (dirname: string, index = 0): string => {
   return fs
     .readFileSync(path.resolve(dirname, "..", "Dockerfile"), "utf-8")
-    .split("\n")
+    .split(EOL)
     [index].split(" ")[1];
 };