vedro-matrix 1.0.0
Simplify parameterized testing with matrix combinations of diverse test parameters
License: Apache-2.0
Requires Python: >=3.8

# vedro-matrix

[![PyPI Version](https://img.shields.io/pypi/v/vedro-matrix)](https://pypi.org/project/vedro-matrix/)
[![License](https://img.shields.io/github/license/mickeystreicher/vedro-matrix)](https://github.com/mickeystreicher/vedro-matrix/blob/main/LICENSE)

`vedro-matrix` is a Python package that extends the [Vedro](https://vedro.io/) framework, enabling parameterized testing with matrix combinations. It simplifies the process of creating and managing multiple test scenarios, especially when dealing with combinations of different test parameters like browsers, screen resolutions, user types, etc.

## Installation

Install [vedro-matrix](https://pypi.org/project/vedro-matrix/) using pip:

```sh
$ pip install vedro-matrix
```

## Usage

To use `vedro-matrix`, import the `params_matrix` decorator from the package and apply it to your test scenarios in a `vedro` test suite.

### Example

Here is an example of how to use `vedro-matrix` to test a web page's rendering on different browsers and resolutions:

```python
import vedro
from vedro_matrix import params_matrix

class Scenario(vedro.Scenario):
    subject = "Open /about page ({browser}, {resolution})"

    @params_matrix(
        ["chrome", "firefox"],
        ["1024x720", "1920x1080"],
    )
    def __init__(self, browser, resolution):
        self.browser = browser
        self.resolution = resolution

    def when_user_opens_page(self):
        self.page = open_about_page(self.browser, self.resolution)

    def then_it_should_show_main_content(self):
        assert self.page.main_content.is_visible()
```

This script will generate and run 4 separate test scenarios:

1. Open /about page (chrome, 1024x720)
2. Open /about page (chrome, 1920x1080)
3. Open /about page (firefox, 1024x720)
4. Open /about page (firefox, 1920x1080)

### Running Tests

Run the scenarios using the `vedro` command:

```sh
$ vedro run
```

You should see an output similar to the following, indicating that all scenarios have passed:

```sh
Scenarios
*
 ✔ Open /about page (chrome, 1024x720)
 ✔ Open /about page (chrome, 1920x1080)
 ✔ Open /about page (firefox, 1024x720)
 ✔ Open /about page (firefox, 1920x1080)

# --seed 79b84f2d-e98c-47bf-b057-acdf597c4143
# 4 scenarios, 4 passed, 0 failed, 0 skipped (1.51s)
```

### Additional Usage Examples

In addition to the standard matrix setup with fixed parameters, `vedro-matrix` offers flexible options to generate test cases using various types of iterables, like lists or enums, which simplifies the process of defining complex combinations of test inputs.

**1. Simple Numeric Parameters**

You can use `vedro-matrix` to test different inputs, such as numeric IDs or other sequences. Here's an example where `post_id` varies:

```python
import vedro
from vedro_matrix import params_matrix

class Scenario(vedro.Scenario):
    @params_matrix([1, 2, 3])
    def __init__(self, post_id):
        self.post_id = post_id
```

This will generate and run 3 test cases with the following values for `post_id`:

1. Scenario with `post_id = 1`
2. Scenario with `post_id = 2`
3. Scenario with `post_id = 3`

**2. Using Enums for Parameters**

In more structured setups, you can use enums to pass values to your test scenarios. This is particularly useful when the test parameters represent distinct options, such as browser types or user roles. Here's how to achieve that:

```python
import vedro
from vedro_matrix import params_matrix
from enum import StrEnum

class Browser(StrEnum):
    CHROME = "chrome"
    FIREFOX = "firefox"


class Scenario(vedro.Scenario):
    @params_matrix(Browser)
    def __init__(self, browser):
        self.browser = browser
```

In this case, `vedro-matrix` will generate two scenarios:

1. Scenario with `browser = "chrome"`
2. Scenario with `browser = "firefox"`

This approach improves code readability and maintainability, especially when managing larger test matrices with more complex inputs.