Added tests for testForBuffer

Author: Rasmus Syberg

src/TransformOperationExecutor.ts

@@ -419,10 +419,10 @@ function instantiateArrayType(arrayType: Function): Array<any> | Set<any> {
     return array;
 }
 
-function testForBuffer(): boolean {
+export function testForBuffer(): boolean {
     try {
         Buffer
         return true;
-    } catch {}
-    return false;    
+    } catch { }
+    return false;
 }

test/functional/basic-functionality.spec.ts

@@ -6,12 +6,21 @@ import {
     plainToClassFromExist,
     classToClass, classToClassFromExist
 } from "../../src/index";
-import {defaultMetadataStorage} from "../../src/storage";
-import {Exclude, Expose, Type} from "../../src/decorators";
-import {expect} from "chai";
+import { defaultMetadataStorage } from "../../src/storage";
+import { Exclude, Expose, Type } from "../../src/decorators";
+import { expect } from "chai";
+import { testForBuffer } from "../../src/TransformOperationExecutor";
 
 describe("basic functionality", () => {
 
+    it("should return true if Buffer is present in environment, else false", () => {
+        expect(testForBuffer()).to.be.true;
+        const bufferImp = global.Buffer;
+        delete global.Buffer;
+        expect(testForBuffer()).to.be.false;
+        global.Buffer = bufferImp;
+    });
+
     it("should convert instance of the given object to plain javascript object and should expose all properties since its a default behaviour", () => {
         defaultMetadataStorage.clear();