chore: move isDynamicBuffer to util.js.

Author: ghosind

src/dynamicBuffer.ts

@@ -202,20 +202,6 @@ export class DynamicBuffer {
     return this.used;
   }
 
-  /**
-   * Returns true if obj is a DynamicBuffer, false otherwise.
-   *
-   * ```js
-   * const buf1 = new DynamicBuffer();
-   * DynamicBuffer.isDynamicBuffer(buf1); // true
-   * const buf2 = Buffer.from('');
-   * DynamicBuffer.isDynamicBuffer(buf2); // false
-   * ```
-   */
-  static isDynamicBuffer(obj: any) {
-    return obj instanceof DynamicBuffer;
-  }
-
   /**
    * Appends string to this buffer according to the character encoding.
    *

src/index.ts

@@ -1 +1,2 @@
 export * from './dynamicBuffer';
+export { isDynamicBuffer } from './utils';

src/utils.ts

@@ -1,3 +1,5 @@
+import { DynamicBuffer } from "./dynamicBuffer";
+
 export const rangeCheck = (field: string, value: number, min?: number, max?: number) => {
   if (min !== undefined && value < min) {
     throw RangeError(`The value of '${field}' is out of range. It must be >= ${min}. Received ${value}`);
@@ -7,3 +9,19 @@ export const rangeCheck = (field: string, value: number, min?: number, max?: num
     throw RangeError(`The value of '${field}' is out of range. It must be <= ${max}. Received ${value}`);
   }
 };
+
+/**
+ * Returns true if obj is a DynamicBuffer, false otherwise.
+ *
+ * ```js
+ * import { isDynamicBuffer } from 'dynamic-buffer';
+ *
+ * const buf1 = new DynamicBuffer();
+ * isDynamicBuffer(buf1); // true
+ * const buf2 = Buffer.from('');
+ * isDynamicBuffer(buf2); // false
+ * ```
+ */
+export const isDynamicBuffer = (val: any) => {
+  return val instanceof DynamicBuffer;
+}

test/dynamicBuffer.spec.ts

@@ -2,7 +2,7 @@ import assert from 'assert';
 import { constants } from 'buffer';
 import { describe, it } from 'mocha';
 
-import { DynamicBuffer } from '../src';
+import { DynamicBuffer, isDynamicBuffer } from '../src';
 
 describe('Initialization tests', () => {
   it('Test initializing with default size', () => {
@@ -111,9 +111,9 @@ describe('Resize tests', () => {
   });
 });
 
-describe('Static methods test', () => {
-  it('Test isDynamicBuffer static method', () => {
-    assert.equal(DynamicBuffer.isDynamicBuffer(Buffer.from('')), false);
-    assert.equal(DynamicBuffer.isDynamicBuffer(new DynamicBuffer()), true);
+describe('Tools methods test', () => {
+  it('Test isDynamicBuffer util method', () => {
+    assert.equal(isDynamicBuffer(Buffer.from('')), false);
+    assert.equal(isDynamicBuffer(new DynamicBuffer()), true);
   });
 });