Major mutation framework 0 mutants covered - testing

When I run the major tool (http://mutation-testing.org/) on the examples provided, I am able to generate and analyze mutants.
I am also able to generate mutants from my own .java files but when I try to run my junit test suites on them, it reports 0 mutants covered.
Could anyone tell me why this might be the case?

I can think of two possible reasons, based on how Major works:
The generated mutants are overwritten by another compilation step between mutant generation and test execution.
The mutants are not enabled during test execution. By default, the generated and embedded mutants have no effect as they are guarded by a condition in the program code.
Could you please provide a minimal working example? This should allow us to determine which of the two issues it is.

Related

Handling Expected Changes in Regression Tests

I am working on using continuous deployment for my service which generates XML files as output. To achieve this, we are planning to add Regression Tests to our deployment flow, where we compare the XML file generated with this code change v/s the one without this code change.
But since some code changes might lead to differences between the output, leading to the test failure.
One approach could be to allow the tests to fail and generate a Diff report which would then be manually approved.
How are such cases handled generally in continuous deployment?
You could use something like this xmldiff tool, which creates human-readable diffs between XML files. If a code change was made that causes a test failure, the diff report would already be generated for you.
I've used similar utilities for screenshot comparison, and although they still require manual review in the end when there are unexpected changes, it speeds up the process quite a bit.

BDD framework to work for with good reports

My project requirements are
1.The framework must produce detailed Step Reports - which can be sent to the client through email.
2.The execution time must be less
3.Easy to write
I know behat and Cucumber
Please suggest me which framework is good ??
I would say Behat+Mink+Selenium combination. I've been using for very long time.
Behat will give you report as you wanted. We always send reports to clients where every single line is printed and either marked as success or failure. At the end of it, you get a full result where you can see overall report.
e.g. bin/behat #YourBundleName -f pretty,html --out ,report-path/behat.html. You can even get screen-shots of failed steps.
Every program can be considered as fast or slow. Result will depend on how you do things. You have a lot of options to make behat tests run fast. e.g. if you use phantomJs to run the tests and symfony2 as default session.
Behat uses Gherkin language which is easy to understand and write. You don't have to be a programmer at all.
One framework known for its pretty reports is Concordion. Please, have a look at the example to view one such report: http://concordion.org/Example.html
The Java version of Concordion utilizes JUnit to execute its tests. So you get a good integration in your development environment. Concordion support multiple technologies such as .NET, Ruby, Python, etc. http://concordion.org/Ports.html
Which technology are you using?
Concordion based on specification by example has been designed with a short learning-curve as a top priority. The purposely small command-set is simple to learn: http://concordion.org/Tutorial.html

BDD with Manual Tests?

We are switching from a classic 'Waterfall' model into more Agile-orient philosophy. We decided to give BDD a try (Cucumber), but we have some issues with migrating some of our 'old' methodologies. The biggest question mark is how manual tests integrates into the cycle.
Let's say the Project Manager defined the Feature and some basic Scenario Outlines. With the test team, we defined around 40 Scenarios for this feature. Some are not possible to automatically test, which means they will have to be tested manually. Execute manual testing when all you have is the feature file, feels wrong. We want to be able to see past failure rate of tests for example. Most of the Test-Cases managers support such features, but they can't work with Feature files. Maintaining the Manual Testcases in external Test-Case manager, will cause never-ending updating issues between the Feature file and the Test-Case manager.
I'm interested to hear if anyone is able to cover this 'mid-ground' and how.
This is not a very unusual case. Even in Agile it may not be possible to automate every scenario. The scrum teams I am working with usually tag them as #manual scenario in the feature file. We have configured our automation suite (Cucumber - Ruby) to ignore these tags while running nightly jobs. One problem with this is, as you have mentioned, we won't know what was the outcome of manual tests as the testers document the results locally.
My suggestion for this was to document the results of each iteration in a YML or any other file format that suits the purpose. This file should be part of the automation suite and should be checked in the repository. So to start with you have results documented along with the automation suite. Later when you have the resource and time, you can add a functionality to your automation suite to read this file and generate a report either with other automation results or separately. Until then your version control should help you to track all previous results.
Hope this helps.
To add to #Eswar's answer, if you're using Cucumber (or one of it's siblings), one option would be to execute the test runner manually and include prompts for the tester to check certain aspects. They then pass/fail the test according to their judgement.
This is often useful for aesthetic aspects e.g. cross-browser rendering, element alignment, correct images used, etc.
As #Eswar mentioned, you can exclude these tests from your automated runs by tagging them.
See this article for an example.
Test cases that cannot be automated are a poor fit for a cucumber test. We have a bunch of these edge cases. It is nigh impossible to get Selenium to verify PDF documents well. Same thing for CSV downloads (not impossible, but not worth the effort). Look and feel tests simply require human eyes at this point. Accessibility testing with screen readers is best done manually as well.
For that, be sure to record the acceptance criteria in the user story in whichever tool you use to track work items. Write a manual test case. The likes of Azure DevOps, Jira, IBM Rational Team Concert and their ilk have ways to record manual test plans, link them to stories, and record the results of executing a manual test.
I would remove the manual test cases from the cucumber tests, and rely on the acceptance criteria for the story, and link the story to some sort of manual test case, be it in a tool or a spreadsheet.
Sometimes you just need to compromise.
We use Azure DevOps with Test Plans + some custom code to synchronize cucumber tests to ADO. I can describe how we’ve realized it in our projects:
We start with the cucumber file first. Each User Story has its own Feature file. The scenarios in the Feature are the acceptance criteria for the story. We end up with lots of Feature files, so we use naming conventions and folders to organize them.
We annotate the top of the Feature file with a tag to the User Story, eg #Story-1234
We‘ve written a command line utility that reads the cucumber files with these tags. It then fetches all the Test Suites in the Test Plan that are linked to Stories. In ADO, a story can only be linked to a single test suite. If a Test Suite doesn’t exist for that Story, our tool creates one.
For each Scenario, the tool creates a an ADO Test Case and then annotates the Scenario with the Test Case ID. This creates amazing traceability for each User Story as the related Test Cases are automatically linked to the Story in the Azure DevOps UI
Although we don’t do this, we could populate the TestCase with the step definitions from our cucumber Scenario. It’s a basic XML structure that describes the steps to take. This would be useful if we wanted to manually execute the test case using the Azure DevOps Test Case UI. Since we focus primarily on automation, we rely on the steps in our Feature files and our ADO Test Cases end up being symbolic links back to cucumber Scenarios.
Because our cucumber tests are written in C# (SpecFlow), we can get the full class name and method for the cucumber test code. Our tool is able to update the Azure DevOps Test Case with the automation details.
Any test case that isn’t ready for automation or must be done manually, we annotate the Scenario with a #ignore or #manual tag.
Using Azure DevOps Pipelines, we use the Visual Studio Test task to run our tests. The important point here is we execute the Test Plan option. This option fetches the Test Cases in the Test Plan that have automation and then executes the specific cucumber tests. The out-of-the-box functionally updates the Test Case statuses with the test results.
After running through automation, we use the Test Plan Report in Azure DevOps which shows the Test Case execution status over time and can distinguish between test automated and manual test cases.
We execute any remaining manual test cases to complete the Test Plan
For us, we often found that the manual cases that cannot be automated are exception cases, or cases that depend on external environment (for example malformed data, network connection not available, maintenance, first time guide...). These cases require special setup to simulate the environment when they happen.
Ideally, I believe it is possible to cover everything, given that you are prepared to go as far as you can to make it happen. But in reality, it is most often too much an effort needed that we prefer the hybrid approach of mixed manual-automatic test cases. We do, however, try to convert those exception cases over the time to automatic ones, by setting up separate environment to simulate exception cases and write automation tests against them.
Nevertheless, even with that effort, there would be cases when it's impossible to simulate, and I believe they should be covered by technical tests from engineers.
You could use an approach similar to the following example:
http://concordion.org/Example.html
When you use a build or continuous integration system to track your test runs, you could add simple specifications / tests for your manual cases that contain a text comparison (e.g. "pass" or "fail"). Then you would need to update the spec after each manual test run, check it in, and start the tests in your build / continuous Integration system. Then the manual results would be recorded together with the results of the automated test execution.
If you would use a tool like Concordion+ (https://code.google.com/p/concordion-plus/) you could even write a summary specification, which could contain scenarios for each of your manual tests. Each one would be reported as individual test result in your test execution environment.
Cheers
taking screen shots seems to be a good idea, you can still automate the verification but will need to go an extra mile. for instance when using Selenium you can add Sikuli(NB: u can't run headless test) to compare results (images) or take a screenshot with Robot (java.awt) use OCR to read text and assert or verify(TestNG)

Running test coverage separately from test execution

We're configuring build steps in TeamCity. Since we have huge problems with test coverage reports (they were there and then inexplainably vanished), we're trying to find a work-trough (asking and bouting a question directly related to our issue yielded very cold response).
Please note that I'm not looking for an opinion but rather a technical knowledge base to support (or kill) the choice of ours. And yes, I've checked the build logs - these are posted in the other thread. This question is about the (in?)sanity of trying an alternative approach. :)
Is it recommended to run a build step for test and then another build step for test coverage?
Does it even makes sense to run these in separate build steps?!
What gains and disadvantages are there to running coverage bundled with/separately from the tests themselves?
Test coverage reports are generated during unit test runs. Unless your problem is with reading generated reports, it doesn't make sense to "run them in separate build steps". Test coverage tells you what parts of your code were run WHILE the tests were running- I don't see how they could be independent.
It may make more sense to ask for help with the test coverage reports no longer being generated...

Tool or eclipse base plugin available for generate test cases for SalesForce platform related Apex classes

Can any one please tell me is there any kind of tools or eclipse base plugins available for generate relevant test cases for SalesForce platform related Apex classes. It seems with code coverage they are not expecting out come like we expect with JUnit, they want to cover whether, test cases are going through the flows of the source classes (like code go through).
Please don't get this post in wrong, I don't want anyone is going to write test cases for my codes :). I have post this question due to nature of SalesForce expecting that code coverage should be. Thanks.
Although Salesforce requires a certain percentage of code coverage for your test cases, you really need to be writing cases that check the results to ensure that the code behaves as designed.
So, even if there was a tool that could generate code to get 100% coverage of your test class, it wouldn't be able to test the results of those method calls, leaving you with a false sense of having "tested code".
I've found that breaking up long methods into separate, sometimes static, methods makes it easier to do unit testing. You can test each individual method, and not worry so much about tweaking parameters to a single method so that it covers all execution paths.
it's now possible to generate test classes automatically for your class/trigger/batch. You can install "Test Class Generator" app from AppExchange and see it working.
This would really help you generating test class and saves lot of your development time.