ssmirr / TestNAnalysis

Test and Analysis

Before you get started

1. Import this as a notebook or clone this repo locally. Also, ensure you install latest version of docable!

docable-server import https://github.com/CSC-DevOps/TestNAnalysis

2. Install the necessary packages...

npm install

📹 Watch the video recording of the slides and workshop as you work/follow along.

https://www.youtube.com/embed/n313mojz9hI

Code Coverage

https://docs.google.com/presentation/d/e/2PACX-1vRKjbwjlpceTDajOsA7Wey1EUBLu6RK2vQMv4T9lc9PFnEwqGkOdfyeA_bcV0Qtz_NmVOg_vBF__tSr/embed?start=false&loop=false&delayms=3000

Quiz ❓

Based on the slides you just reviewed... Does condition coverage imply branch coverage?

- [ ] YES
- [ ] NO

We'll describe why (or why not) in next set of slides ⏭️.

But before doing that, we're going to get hands-on practice with measuring statement and branch coverage.

Practice: Statement and Branch Coverage

Given the follow code, will we provide test inputs for achieving 100% statement and branch coverage...

function inc(p, q) {
    if(q == undefined) q=1;
    if( p < 0 )
    {
        p = -p;
    }
    return p + q/q;
}

Use the following for providing test inputs.

var main = require("../index.js");

describe("unit tests for index.js", function() {

    it("testing inputs for inc()", function() {
       main.inc(1,1);
       // Add more test inputs...
       
    });

});

Calculate the current code coverage. Use the coverage report below to see what has not been covered. Try extending the tests to covere more branches and statements.

npm run coverage

Coverage report

You can also view the coverage report by clicking the Reload button, or in a new tab or window, open the coverage report:

Reload

<iframe id="serviceFrameSend" src="./coverage/lcov-report/index.html" width="800" height="600" frameborder="1"></iframe>

Advanced Code Coverage

What about other forms of test coverage? Just how far does this rabbit hole go?

https://docs.google.com/presentation/d/e/2PACX-1vQMoeBFeBRhhOP_LT8mT-kmf4HUFO4pSFIp2B2pnIb1c_16f23TdFB_2eIVuroroCQ5AhWD4AWEoNo3/embed?start=false&loop=false&delayms=3000

Quiz ❓

1. Does achieve 100% path coverage mean you also have achieved 100% branch coverage?

- [ ] YES
- [ ] NO

2. Does achieve 100% path coverage mean you also have achieved 100% condition coverage?

- [ ] YES
- [ ] NO

3. Why might be data-flow coverage be effective for testing?

- [ ] Provides a rationale for how robust a test suite might be to mistaken changes to the code.
- [ ] Describes all the conditions that a predicate in a if statement can contain.
- [ ] Allows testing the same line of code, with variables changed by uniquely different subpaths above.

1 2 3 4 5 6