当任何任何 arguments 用于方法时，Mockito 存根返回 null

Question

I have the below method which I want to sub:

ProductArray productsArray;
productsArray = dataService.getProducts(ProductFilter pf, Date date1, Date date2, boolean matured);

In my test class I have below

ProductArray productsArrayTest = getProductsArrayForTest();
Mockito.when(dataServiceMock.getProducts(Mockito.any(ProductFilter.class), Mockito.any(Date.class), Mockito.any(Date.class), Mockito.any(Boolean.class))).thenReturn(productsArrayTest);

However in this test productsArray returns as null ;

Mockito gives the below warning

[MockitoHint] 1. Unused... -> at 
com.company.util.TestProduct.testProductLoad(TestProduct.java:157)
[MockitoHint]  ...args ok? -> at 
com.company.datastore.ProductLoader.processAll(ProductLoaderProcess.java:158)

What could be the reason for this?

Edit:

private ProductArray getProductsArrayTest() {
    ProductArray pa = new ProductArray();
    Product product = createProduct();
    pa.add(product);
    return pa;
}

private Product createProduct() {
    Product p = new Product();
    p.setPrice(1.23);
    return p;
}

Answer 1

• Edit after the first comment - I see that you call the method getProductsArrayForTest() while you define getProductsArrayTest(). Check if it is only a mistake in the post or even in the code. However here is the code and the test succeeds.

   public class Product { double price; public Product() { } public double getPrice() { return this.price; } public void setPrice(double value) { this.price=value; } }

  ProductArray.class

   import java.util.ArrayList; import java.util.List; public class ProductArray { private List<Product> productList; public ProductArray() { productList=new ArrayList<Product>(); } public void add(Product product) { this.productList.add(product); } public List<Product> getProductList(){ return this.productList; } }

  ProductTest.class

   public class ProductTest { @Test public void testProduct() { DataService dataserviceMock = Mockito.mock(DataService.class); ProductArray productsArrayTest = getProductsArrayTest(); Mockito.when(dataserviceMock.getProducts(Mockito.any(ProductFilter.class), Mockito.any(Date.class), Mockito.any(Date.class), Mockito.anyBoolean())).thenReturn(productsArrayTest); assertEquals(1, dataserviceMock.getProducts(null, null, null, false).getProductList().size()); } private ProductArray getProductsArrayTest() { ProductArray pa = new ProductArray(); Product product = createProduct(); pa.add(product); return pa; } private Product createProduct() { Product p = new Product(); p.setPrice(1.23); return p; } }