make ClientSideEncryptionFilter use instance fields, not static fields

Author: baileympearson

test/tools/runner/filters/client_encryption_filter.ts

@@ -21,16 +21,16 @@ import { Filter } from './filter';
  */
 
 export class ClientSideEncryptionFilter extends Filter {
-  enabled: boolean;
-  static version = null;
-  static libmongocrypt: string | null = null;
+  enabled: boolean = false;
+  version: string | null = null;
+  libmongocrypt: string | null = null;
 
   override async initializeFilter(client: MongoClient, context: Record<string, any>) {
     let mongodbClientEncryption: typeof import('mongodb-client-encryption');
     try {
       // eslint-disable-next-line @typescript-eslint/no-require-imports
       mongodbClientEncryption = require('mongodb-client-encryption');
-      ClientSideEncryptionFilter.libmongocrypt = (
+      this.libmongocrypt = (
         mongodbClientEncryption as typeof import('mongodb-client-encryption')
       ).MongoCrypt.libmongocryptVersion;
     } catch (failedToGetFLELib) {
@@ -39,21 +39,23 @@ export class ClientSideEncryptionFilter extends Filter {
       }
     }
 
-    ClientSideEncryptionFilter.version ??= JSON.parse(
-      await readFile(
-        resolve(dirname(require.resolve('mongodb-client-encryption')), '..', 'package.json'),
-        'utf8'
-      )
-    ).version;
+    if (!this.version) {
+      this.version = JSON.parse(
+        await readFile(
+          resolve(dirname(require.resolve('mongodb-client-encryption')), '..', 'package.json'),
+          'utf8'
+        )
+      ).version;
+    }
 
     this.enabled = !!(kmsCredentialsPresent && mongodbClientEncryption);
 
     // Adds these fields onto the context so that they can be reused by tests
     context.clientSideEncryption = {
       enabled: this.enabled,
       mongodbClientEncryption,
-      version: ClientSideEncryptionFilter.version,
-      libmongocrypt: ClientSideEncryptionFilter.libmongocrypt
+      version: this.version,
+      libmongocrypt: this.libmongocrypt
     };
   }
 
@@ -73,18 +75,17 @@ export class ClientSideEncryptionFilter extends Filter {
 
     // TODO(NODE-3401): unskip csfle tests on windows
     if (process.env.TEST_CSFLE && process.platform !== 'win32') {
-      if (ClientSideEncryptionFilter.version == null) {
+      if (this.version == null) {
         throw new Error('FLE tests must run, but mongodb client encryption was not installed.');
       }
     }
 
     if (!kmsCredentialsPresent) return 'Test requires FLE kms credentials';
-    if (ClientSideEncryptionFilter.version == null)
-      return 'Test requires mongodb-client-encryption to be installed.';
+    if (this.version == null) return 'Test requires mongodb-client-encryption to be installed.';
 
     const validRange = typeof clientSideEncryption === 'string' ? clientSideEncryption : '>=0.0.0';
-    return satisfies(ClientSideEncryptionFilter.version, validRange, { includePrerelease: true })
+    return satisfies(this.version, validRange, { includePrerelease: true })
       ? true
-      : `requires mongodb-client-encryption ${validRange}, received ${ClientSideEncryptionFilter.version}`;
+      : `requires mongodb-client-encryption ${validRange}, received ${this.version}`;
   }
 }