fix: update iobuffer (#3)

Author: targos

package.json

@@ -8,7 +8,7 @@
   "license": "MIT",
   "dependencies": {
     "eslint-config-cheminfo": "^8.0.2",
-    "iobuffer": "^3.1.0"
+    "iobuffer": "^5.1.0"
   },
   "devDependencies": {
     "@jest/globals": "^28.1.3",
@@ -20,11 +20,10 @@
   "scripts": {
     "eslint": "eslint src",
     "eslint-fix": "eslint --fix src",
-    "test": "npm run test-coverage && npm run eslint",
-    "test-only": "jest",
+    "test": "npm run test-only && npm run eslint && npm run prettier",
     "prettier": "prettier --check src",
     "prettier-write": "prettier --write src",
-    "test-coverage": "jest --coverage",
+    "test-only": "jest --coverage",
     "test-watch": "jest --watch",
     "test-write": "FAST_BMP_WRITE_DATA_FILES=1 npm run test-jest"
   },

src/BMPEncoder.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const IOBuffer = require('iobuffer');
+const { IOBuffer } = require('iobuffer');
 
 const constants = require('./constants');
 
@@ -36,7 +36,8 @@ class BMPEncoder extends IOBuffer {
     this.writePixelArray();
     this.encoded.rewind();
     this.writeBitmapFileHeader(offset);
-    return this.encoded.getBuffer();
+    const array = this.encoded.toArray();
+    return Buffer.from(array.buffer, array.byteOffset, array.byteLength);
   }
 
   writePixelArray() {
@@ -104,7 +105,7 @@ class BMPEncoder extends IOBuffer {
   writeBitmapFileHeader(imageOffset) {
     this.encoded
       .writeChars('BM') // 14 bytes bitmap file header
-      .writeInt32(this.encoded._lastWrittenByte) // Size of BMP file in bytes
+      .writeInt32(this.encoded.lastWrittenByte) // Size of BMP file in bytes
       .writeUint16(0)
       .writeUint16(0)
       .writeUint32(imageOffset);