This project contains a small add-on to LUnit for creating parameterized tests. Parameterization is useful when you need to test the same functionality using a set of different inputs and expected results. Using the Parameterized Test Case, this can be done in a way which minimizes code duplication and provides a starting point for developing these types of tests.
The add-on is installed using the vip-file under the releases section of this repository. LabVIEW 2020 or newer versions are supported.
To get started, let us look at an example. Let's assume we want to test conversion of some adc value from a temperature sensor. We could know the following possible values:
| Raw data | Temperature [degC] |
|---|---|
| 0x0000 | -40.0 |
| 0x7D00 | 125.0 |
| 0x313E | 25.0 |
| 0xFFFF | Error |
Now we could write four different tests to test each value. However, using the Parameterized Test Case, we may write one test and define four parameter sets to test against. We start by creating a new Parameterized Test Case from the Tools menu option
You'll get a new class created from a template. This is what the template looks like.
We start by adding the inputs value and expected output values in the Parameters.ctl. We are just defining the names and datatypes here.
Next we can go to the Parameters.vi.
In this VI, there is an array constant, we just fill that with our scenario information.
We have still not written the actual test, so let's do that next. We now need to write the test once, with the parameters taken from the paramaters cluster in the private data of the class.
When executed by LUnit, this method will be run four times, once for each parameter. LUnit will report the results for each parameter under the test case name in the UI. The index of the scenario, as in the array above, will be prepended to the scenario name.
And of course the results will turn green once the parser is implemented.