How to: :thumbsdown: Anti-Pattern Example: No separation, one bulk, harder to interpret
```javascript
test("Should be classified as premium", () => {
  const customerToClassify = { spent: 505, joined: new Date(), id: 1 };
  const DBStub = sinon.stub(dataAccess, "getCustomer").reply({ id: 1, classification: "regular" });
  const receivedClassification = customerClassifier.classifyCustomer(customerToClassify);
  expect(receivedClassification).toMatch("premium");
});
```