Create a new guide for ddev command exposing

guides/beginner/ddev-expose-behat-and-phpunit.md

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+---
+last_modified_on: "2023-08-07"
+title: DDEV Expose Behat and PHPUnit
+description: A guide on how to expose Behat and PHPUnit to the host machine when using DDEV.
+series_position: null
+author_github: https://github.com/admirlju
+author_name: Admir Ljubijankic
+tags: ["language: bash", "ddev", "behat", "phpunit"]
+---
+
+## About
+
+This guide will show you how to expose Behat and PHPUnit to the host machine when using DDEV.
+This will allow us to run tests with `ddev <command>` instead of `ddev exec <command>` or using `ddev ssh`.
+
+## Prerequisites
+
+- [DDEV](https://ddev.readthedocs.io/en/stable/)
+- [Behat](https://docs.behat.org/en/latest/)
+- [PHPUnit](https://phpunit.readthedocs.io/en/9.5/)
+
+## Assumptions
+
+- You have a working DDEV PHP project.
+- You have Behat and PHPUnit installed inside your DDEV project.
+
+## Steps
+
+### 1. Create new bash scripts for Behat and PHPUnit
+
+In your DDEV project, you should have a `.ddev/commands` directory.
+This directory contains directories for each container that DDEV uses. In our case, we will be using the `web` container.
+
+Inside the `web` directory, create two new files: `behat` and `phpunit`.
+
+```bash
+touch .ddev/commands/web/behat
+touch .ddev/commands/web/phpunit
+```
+
+#### Remember
+
+These files do not end with `.sh` extension.
+
+At this point you can also make these files executable by running:
+
+```bash
+chmod +x .ddev/commands/web/behat
+chmod +x .ddev/commands/web/phpunit
+```
+
+### 2. Edit the `behat` and `phpunit` scripts
+
+Let's first add the necessary code and I'll explain what it does later.
+
+#### behat:
+
+```bash
+#!/bin/bash
+
+## Description: Run Behat inside the web container
+## Usage: ddev behat [options]
+## Example: ddev behat --tags @javascript
+## HostWorkingDirectory: true
+## ExecRaw: true
+$DDEV_COMPOSER_ROOT/vendor/bin/behat "$@"
+```
+
+#### phpunit:
+
+```bash
+#!/bin/bash
+
+## Description: Run PHPUnit inside the web container
+## Usage: ddev phpunit [options]
+## Example: ddev phpunit --filter testSomething
+## HostWorkingDirectory: true
+## ExecRaw: true
+$DDEV_COMPOSER_ROOT/vendor/bin/phpunit "$@"
+```
+
+#### Explanation
+
+- `#!/bin/bash` - This is the shebang. It tells the shell what interpreter to use when executing the script.
+- `## Description: Run Behat inside the web container` - The description of the command that will be shown when running `ddev list`.
+- `## Usage: ddev behat [options]` - The usage of the command that will be shown when running `ddev help behat`.
+- `## Example: ddev behat --tags @javascript` - The example of the command that will be shown when running `ddev help behat`.
+- `## HostWorkingDirectory: true` - Your container command will be executed in the same directory as your current host working directory.
+- `## ExecRaw: true` - This will pass command arguments directly to the container. This is recommended for all container commands.
+- `$DDEV_COMPOSER_ROOT/vendor/bin/behat "$@"` - The command that will be executed inside the container. `$DDEV_COMPOSER_ROOT`
+is the absolute path to the composer root directory inside the container. `"$@"` will pass all arguments to the command.
+
+### 3. Run Behat and PHPUnit
+
+Now that we have our scripts ready, we can test them out.
+
+```bash
+ddev behat --version
+ddev phpunit --version
+```
+
+You should see the output of the commands.
+
+## Conclusion
+
+We have successfully exposed Behat and PHPUnit to the host machine when using DDEV. Remember you can do this for any
+other command you want to expose. These commands are basic bash scripts that will be executed, so you can make them as complex as you need.
+You can also put commands in the global ddev scope if you want to run them from any container.
+
+In the official DDEV documentation, you can find more useful annotations and environment variables that you can use.
+
+## Resources
+
+- [DDEV Documentation](https://ddev.readthedocs.io/en/latest/users/extend/custom-commands)