3.0.18

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartstream",
-  "version": "3.0.16",
+  "version": "3.0.18",
   "private": false,
   "description": "simplifies access to node streams",
   "main": "dist_ts/index.js",

test/test.streamfunction.ts

@@ -29,7 +29,7 @@ tap.test('should handle a read stream', async (tools) => {
       },
     })
   ]);
-  // await streamWrapper.run();
+  await streamWrapper.run();
 });
 
 tap.test('should create a valid Intake', async (tools) => {

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartstream',
-  version: '3.0.16',
+  version: '3.0.18',
   description: 'simplifies access to node streams'
 }

ts/smartstream.classes.smartduplex.ts

@@ -129,12 +129,18 @@ export class SmartDuplex<TInput = any, TOutput = any> extends Duplex {
     }
   }
 
+  public notBackpressured = true;
+  public get backpressured(): boolean {
+    return !this.notBackpressured;
+  }
   public push(chunkArg?: TOutput | null): boolean {
     const result = super.push(chunkArg);
     if (!result && this.handleBackpressure) {
+      this.notBackpressured = false;
       this.pause();
       // Listen for 'drain' event to resume
       this.once('drain', () => {
+        this.notBackpressured = true;
         this.resume(); // Resume the source of data
       });
     }
@@ -158,12 +164,21 @@ export class SmartDuplex<TInput = any, TOutput = any> extends Duplex {
     try {
       const modifiedChunk = await this.writeFunction(chunk, tools);
       if (modifiedChunk) {
-        this.push(modifiedChunk);
+        this.push(modifiedChunk)
+        if (this.backpressured && this.handleBackpressure) {
+          this.once('drain', () => {
+            callback();
+          });
+        } else {
+          callback();
+        }      
+      } else {
+        callback();
       }
-      callback();
     } catch (err) {
       callback(err);
     }
+    return this.notBackpressured;
   }
 
   public async _final(callback: (error?: Error | null) => void) {