Clean up and documentation

Author: jekuaitk

README.md

@@ -106,13 +106,16 @@ $key = $repository->getKey('openid_connect_ad');
 
 ## Providers
 
+The module comes with two key providers.
+
 ### Azure Key Vault
 
-`@todo` <https://azure.microsoft.com/en-us/products/key-vault>
+Used for fetching certificate from Azure Key vault. 
 
-### Infisical
+### HashiCorp Vault
 
-`@todo` <https://infisical.com/>
+Used to fetch any sort of secret string from HashiCorp vault. Note that
+this can only provide string values, i.e. no binary files.
 
 ## Coding standards
 
@@ -146,3 +149,17 @@ analysis:
 ```shell
 docker run --rm --volume ${PWD}:/app --workdir /app itkdev/php8.3-fpm ./scripts/code-analysis
 ```
+
+## Unit tests
+
+We use [PHPUnit](https://phpunit.de/documentation.html) for unit testing.
+
+Testing mostly centers around the conversion and parsing of certificates. For this purpose a bunch of test
+certificates has been generated.
+
+Running PHPUnit tests in a standalone Drupal module is a bit tricky, so we use a helper script to run the
+analysis:
+
+```shell
+docker run --rm --volume ${PWD}:/app --workdir /app itkdev/php8.3-fpm ./scripts/unit-tests
+```

composer.json

@@ -47,13 +47,6 @@
         "sort-packages": true
     },
     "scripts": {
-        "code-analysis": [
-            "@code-analysis/drupal-check"
-        ],
-        "code-analysis/drupal-check": [
-            "# @see https://github.com/mglaman/drupal-check/issues/261#issuecomment-1030141772 for details on exclude-dir value",
-            "drupal-check --deprecations --analysis --exclude-dir='vendor' *.* src"
-        ],
         "coding-standards-apply": [
             "@coding-standards-apply/phpcs"
         ],