chore: move randomVal test to correct folder

test/common/libs/randomVal.js

@@ -0,0 +1,47 @@
+import randomVal from '../../../website/common/script/libs/randomVal';
+
+describe('randomVal', () => {
+  let obj;
+
+  beforeEach(() => {
+    obj = {
+      a: 1,
+      b: 2,
+      c: 3,
+      d: 4,
+    };
+  });
+
+  afterEach(() => {
+    sandbox.restore();
+  });
+
+  it('returns a random value from an object', () => {
+    let result = randomVal(obj);
+    expect(result).to.be.oneOf([1, 2, 3, 4]);
+  });
+
+  it('uses Math.random to determine the property', () => {
+    sandbox.spy(Math, 'random');
+
+    randomVal(obj);
+
+    expect(Math.random).to.be.calledOnce;
+  });
+
+  it('can pass in a predictable random value', () => {
+    sandbox.spy(Math, 'random');
+
+    let result = randomVal(obj, {
+      predictableRandom: 0.3,
+    });
+
+    expect(Math.random).to.not.be.called;
+    expect(result).to.equal(2);
+  });
+
+  it('returns a random key when the key option is passed in', () => {
+    let result = randomVal(obj, { key: true });
+    expect(result).to.be.oneOf(['a', 'b', 'c', 'd']);
+  });
+});