Test Entity Framework Core 7 code without database - unit-testing

I created models based on database requirements using Entity Framework Core 7 but I don't know how to write unit tests and test the code because as of now we don't have any database.
So, is there any way to test the EF Core 7 code without a database?
When I googled, I saw few links related to in-memory database. Will this work for me or do we have any other better options?
Please guide me.
Thank you.

Related

Creating MOCK UP Data for Neo4j Unit testing

I want to do unit testing for my application in neo4j with java code .We are writing junit test cases for it. But we want when we run the junit test cases it should not communicate it to the main database rather then some other mockup data.
We are using neo4j server and no embedded database is used.
How could this be achieved?
How can we create mockup data for testing neo4j related code?
How to create a mocked database for unit testing so that main database
not be touched.
Is there any tool to mock the main database or we have to do it
manually through the code?
We've got a great article on testing your Neo4j-based Java application that should give you a few options for testing.

Test a query using Django nose

I am new to testing in django. I am using django nose for TDD.I am using django nose version 1.2 in my virtual environment. I referred the link below for creating my tests.
http://kokoko.fluxionary.net/testing-django-part-1-nose
Currently I need to test the query that I am going to write in my views ie to check whether the query output is correct. I used the code below but test fails:
import nose.tools as nt
nt.assert_true('obj_list' in resp.context)
nt.assert_equal([obj.pk for obj in resp.context['obj_list']], [1])
Any help will be much appreciated. Thanks in advance.
It looks like you don't have any objects in your database, so the test fails - when you run your tests a new database is created, so data from development database is not going to be transfered into your isolated test environment.
Choose one of the available solutions:
Create a fixture file, so it will hold data for all of your tests:
https://docs.djangoproject.com/en/dev/howto/initial-data/
Create objects in a setUp method or in the test method, and then try to do some asserts.
Read this first, if don't have experience with testing in Django:
https://docs.djangoproject.com/en/1.6/topics/testing/overview/

Cakephp Fixtures automatic truncate table not working properly

I recently switched over from cakephp 2.2.5 to 2.3 and the auto-truncate table is no longer working in 2.3.
What I did in 2.2.5 was just testing the framework using some small tables with no relations aka foreign keys constraints and the fixture import and auto-truncate table worked flawlessly.
Until I confirmed that I wanted to use cakephp and started developing my application using the CakeTestCase again. It stopped working. Data is still in the test database after they are imported the first time. So second time it would indicate that it fails to auto-load fixtures because data with the same IDs already exist.
So I started to suspect that it was mainly because the foreign key constraints I had in my current tables.
I searched the web and noticed that quite a lot of people having the same issue but there isn't a real solution to it yet.
The only one that seems to be a solution is here:
http://cakephp.lighthouseapp.com/projects/42648/tickets/2905-tests-fixture-table-ar-not-truncate-when-droptable-false
However, I tried turning on $dropTables = true, it didn't work. And also I tried modifying the CakeFixtureManager.php as suggested and it didn't work either.
Does anybody know how to fix this issue?

How to set up Doctrine2 fixtures when testing with PHPUnit?

I'm trying to get started with Symfony2 and have been trying to set up automated testing for the model layer of my application. The Symfony2 book talks about unit testing for controllers but I can't find many examples of model testing.
I would like to have a clean data set to work with before each test runs and found these articles:
http://blog.sznapka.pl/fully-isolated-tests-in-symfony2/
http://symfony.com/doc/current/cookbook/doctrine/doctrine_fixtures.html
Based on the sznapka.pl article I have a test actually running without errors, but although the test schema is created the fixtures don't load. I can't see why, or even a way to debug this.
Background: I've previously worked with CakePHP where the loading of fixtures is largely handled automatically, maybe I have the wrong approach for Symfony/Doctrine?
Yes DoctrineFixtures are a good choice.
To test model: you don't really need to load fixtures in the database, you should create objects with the data you want (by injecting it with setters).
To test controller: load doctrine fixtures and use doctrine transactions so the state of your database is the same before each testcase, begin transaction in setUp() and rollback in tearDow(). (If your controller use transactions too i haven't found a good solution yet).
For fixtures error, if you don't have any error and your fixtures aren't loaded maybe you have missed a naming convention. Can you show us some code ?
Have a look at this solution. I don't think using transactions is the best idea, since chances are that you'll use transactions in your code. This solution suggests to load fixtures manually in each of your test.
There is a very handy LiipFunctionalTestBundle that simplifies working with a fixtures in test. The basic idea is to create a database each time you run the tests and then load fixtures. Now you can save the models, delete, every test they will be the same.

Automated Testing in Apache Hive

I am about to embark on a project using Apache Hadoop/Hive which will involve a collection of hive query scripts to produce data feeds for various down stream applications. These scripts seem like ideal candidates for some unit testing - they represent the fulfillment of an API contract between my data store and client applications, and as such, it's trivial to write what the expected results should be for a given set of starting data. My issue is how to run these tests.
If I was working with SQL queries, I could use something like SQLlite or Derby to quickly bring up test databases, load test data and run a collection of query tests against them. Unfortunately, I am unaware of any such tools for Hive. At the moment, my best thought is to have the test framework bring up a hadoop local instance and run Hive against that, but I've never done that before and I'm not sure it will work, or be the right path.
Also, I'm not interested in a pedantic discussion about if what I am doing is unit testing or integration testing - I just need to be able to prove my code works.
Hive has special standalone mode, specifically design for the testing purposes. In this case it can run without hadoop. I think it is exactly what you need.
There is a link to the documentation:
http://wiki.apache.org/hadoop/Hive/HiveServer
I'm working as part of a team to support a big data and analytics platform, and we also have this kind of issue.
We've been searching for a while and we found two pretty promising tools: https://github.com/klarna/HiveRunner https://github.com/bobfreitas/HadoopMiniCluster
HiveRunner is a framework built on top of JUnit to test Hive Queries. It starts a standalone HiveServer with in memory HSQL as the metastore. With it you can stub tables, views, mock samples, etc.
There are some limitations on Hive versions though, but I definitely recommend it
Hope it helps you =)
You may also want to consider the following blog post which describes automating unit testing using a custom utility class and ant: http://dev.bizo.com/2011/04/hive-unit-testing.html
I know this is an old thread, but just in case someone comes across it. I have followed up on the whole minicluster & hive testing, and found that things have changed with MR2 and YARN, but in a good way. I have put together an article and github repo to give some help in it:
http://www.lopakalogic.com/articles/hadoop-articles/hive-testing/
Hope it helps!