add 'create' to be more compatible with crypto-js

fix #9

Author: PeterAlfredLee

src/core/core.js

@@ -96,6 +96,22 @@ export class Base {
     Object.assign(clone, this);
     return clone;
   }
+
+  /**
+   * Get a new instance of this class.
+   * Arguments to create() will be passed to constructor.
+   *
+   * @return {Object} The new object.
+   *
+   * @static
+   *
+   * @example
+   *
+   *     var instance = MyType.create();
+   */
+  static create(...args) {
+    return new this(...args);
+  }
 }
 
 /**

test/md5.test.js

@@ -48,6 +48,16 @@ describe('algo-md5-test', () => {
     expect(md5.finalize().toString()).toBe('7d017545e0268a6a12f2b507871d0429');
   });
 
+  test('testCreate', () => {
+    let i = 0;
+    const md5 = C.algo.MD5.create();
+    while (i < 100) {
+      md5.update('12345678901234567890123456789012345678901234567890');
+      i++;
+    }
+    expect(md5.finalize().toString()).toBe('7d017545e0268a6a12f2b507871d0429');
+  });
+
   test('testInputIntegrity', () => {
     const message = new C.lib.WordArray([0x12345678]);
     const expected = message.toString();