Fixed test for node generator.

Author: Johannestegner

src/Generator.js

@@ -1,7 +1,4 @@
-import { randomBytes } from "crypto";
-
 export default class Generator {
-
   /**
    * @internal
    * @abstract

test/NodeGenerator.test.js

@@ -0,0 +1,35 @@
+import NodeGenerator from '../src/NodeGenerator';
+
+const generator = new NodeGenerator();
+
+describe('Tests for node generator.', () => {
+  test('Return value is correct type.', () => {
+    const result = generator.getRandom(10);
+    expect(result).toBeInstanceOf(Uint8Array);
+  });
+
+  test('List contains values between -255 and +255', () => {
+    const result = generator.getRandom(128);
+    let min = 0;
+    let max = 0;
+
+    result.forEach((obj) => {
+      if (obj < min) {
+        min = obj;
+      }
+      if (obj > max) {
+        max = obj;
+      }
+    });
+
+    expect(max).toBeLessThan(256);
+    expect(min).toBeGreaterThan(-256);
+  });
+
+  test('Two calls generates different values.', () => {
+    const one = generator.getRandom(20);
+    const two = generator.getRandom(20);
+
+    expect(JSON.stringify(one)).not.toStrictEqual(JSON.stringify(two));
+  });
+});