add some method names during client closed errors

Author: HanaPearlman

src/collection.ts

@@ -655,7 +655,7 @@ export class Collection implements OperationParent {
     }
 
     const topology = this.getTopology();
-    if (!topology) throw new MongoClientClosedError();
+    if (!topology) throw new MongoClientClosedError('Collection.prototype.find');
     return new Cursor(
       topology,
       new FindOperation(this, this.s.namespace, filter, options),
@@ -867,7 +867,7 @@ export class Collection implements OperationParent {
    */
   listIndexes(options?: ListIndexesOptions): CommandCursor {
     const topology = this.getTopology();
-    if (!topology) throw new MongoClientClosedError();
+    if (!topology) throw new MongoClientClosedError('Collection.prototype.listIndexes');
     const cursor = new CommandCursor(topology, new ListIndexesOperation(this, options), options);
 
     return cursor;
@@ -1213,7 +1213,7 @@ export class Collection implements OperationParent {
     options = options || {};
 
     const topology = this.getTopology();
-    if (!topology) throw new MongoClientClosedError();
+    if (!topology) throw new MongoClientClosedError('Collection.prototype.aggregate');
     return new AggregationCursor(
       topology,
       new AggregateOperation(this, pipeline, options),

src/db.ts

@@ -311,7 +311,7 @@ export class Db implements OperationParent {
 
     options = options || {};
 
-    if (!this.s.client.topology) throw new MongoClientClosedError();
+    if (!this.s.client.topology) throw new MongoClientClosedError('Db.prototype.aggregate');
     const cursor = new AggregationCursor(
       this.s.client.topology,
       new AggregateOperation(this, pipeline, options),
@@ -432,7 +432,7 @@ export class Db implements OperationParent {
     filter = filter || {};
     options = options || {};
 
-    if (!this.s.client.topology) throw new MongoClientClosedError();
+    if (!this.s.client.topology) throw new MongoClientClosedError('Db.prototype.listCollections');
     return new CommandCursor(
       this.s.client.topology,
       new ListCollectionsOperation(this, filter, options),

src/operations/execute_operation.ts

@@ -64,9 +64,7 @@ export function executeOperation<
   operation: T,
   callback?: Callback<TResult>
 ): Promise<TResult> | void {
-  if (topology == null) {
-    throw new MongoClientClosedError();
-  }
+  if (!topology) throw new MongoClientClosedError();
 
   if (!(operation instanceof OperationBase)) {
     throw new TypeError('This method requires a valid operation instance');

src/utils.ts

@@ -270,7 +270,7 @@ export function executeLegacyOperation<T extends OperationBase>(
 ): void | Promise<any> {
   const Promise = PromiseProvider.get();
 
-  if (topology == null) throw new MongoClientClosedError();
+  if (!topology) throw new MongoClientClosedError();
 
   if (!Array.isArray(args)) {
     throw new TypeError('This method requires an array of arguments to apply');
@@ -439,9 +439,7 @@ export function decorateWithCollation(
   topology: Topology | undefined,
   options: AnyOptions
 ): void {
-  if (!topology) {
-    throw new MongoClientClosedError();
-  }
+  if (!topology) throw new MongoClientClosedError();
 
   const capabilities = topology.capabilities();
   if (options.collation && typeof options.collation === 'object') {