public void DirectoryController_SearchFilesTest_RightPath_ReturnCorrectModel() { mockFileService.Setup(a => a.SearchFiles(It.IsAny <string>(), It.IsAny <string>())).Returns(new Dictionary <string, string>() { { "D:\\Hello\\New", "folder" }, { "D:\\Hello\\New\\New11.txt", "file" } }); var result = controller.SearchFiles("D\\Hello", "New") as PartialViewResult; Assert.IsNotNull(result); // mockFileService.Verify(a => a.SearchFiles("D:\\Hello", "New")); Assert.AreEqual("SearchFiles", result.ViewName); }