API Enable config files to be loaded for behat tests

composer.json

@@ -94,8 +94,8 @@
         "thirdparty/"
     ],
     "scripts": {
-        "lint": "phpcs src/ tests/php",
+        "lint": "phpcs src/ tests/php/ tests/behat/src/",
-        "lint-clean": "phpcbf src/ tests/php",
+        "lint-clean": "phpcbf src/ tests/php/ tests/behat/src/",
         "php-peg": "php thirdparty/php-peg/cli.php src/View/SSTemplateParser.peg > src/View/SSTemplateParser.php"
     },
     "minimum-stability": "dev",

tests/behat/src/CmsFormsContext.php

@@ -352,5 +352,4 @@ JS;
         // Destroy cookie to detach session
         $this->getMainContext()->getSession()->setCookie('PHPSESSID', null);
     }
-
 }

tests/behat/src/ConfigContext.php

@@ -0,0 +1,133 @@
+<?php
+
+namespace SilverStripe\Framework\Tests\Behaviour;
+
+use Behat\Behat\Context\Context;
+use Behat\Behat\Hook\Scope\AfterScenarioScope;
+use InvalidArgumentException;
+use SilverStripe\BehatExtension\Context\MainContextAwareTrait;
+use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Core\Kernel;
+use SilverStripe\Core\Manifest\ModuleLoader;
+use SilverStripe\Core\Manifest\ModuleManifest;
+
+/**
+ * Provides custom config abilities.
+ */
+class ConfigContext implements Context
+{
+    use MainContextAwareTrait;
+
+    /**
+     * Path to yml config fixtures
+     *
+     * @var string
+     */
+    protected $configPath;
+
+    /**
+     * Track all config files installed into mysite/_config/behat*.yml
+     *
+     * @var string[]
+     */
+    protected $activatedConfigFiles = [];
+
+    /**
+     * Create new ConfigContext
+     *
+     * @param string $configPath Path to config files. E.g.
+     * `%paths.modules.framework%/tests/behat/features/configs/`
+     */
+    public function __construct($configPath = null)
+    {
+        if (empty($configPath)) {
+            throw new InvalidArgumentException("filesPath is required");
+        }
+        $this->setConfigPath($configPath);
+    }
+
+    /**
+     * @return string
+     */
+    public function getConfigPath()
+    {
+        return $this->configPath;
+    }
+
+    /**
+     * @param string $configPath
+     * @return $this
+     */
+    public function setConfigPath($configPath)
+    {
+        $this->configPath = $configPath;
+        return $this;
+    }
+
+    /**
+     * Clean up all files after scenario
+     *
+     * @AfterScenario
+     * @param AfterScenarioScope $event
+     */
+    public function afterResetAssets(AfterScenarioScope $event)
+    {
+        // No files to cleanup
+        if (empty($this->activatedConfigFiles)) {
+            return;
+        }
+
+        foreach ($this->activatedConfigFiles as $configFile) {
+            if (file_exists($configFile)) {
+                unlink($configFile);
+            }
+        }
+        $this->activatedConfigFiles = [];
+
+        // Flush
+        $this->stepIFlush();
+    }
+
+    /**
+     * @When /^(?:|I )go flush the website$/
+     */
+    public function stepIFlush()
+    {
+        $this->getMainContext()->visit('/?flush=all');
+    }
+
+    /**
+     * Setup a config file. The $filename should be a yml filename
+     * placed in the directory specified by configPaths argument
+     * to fixture constructor.
+     *
+     * @When /^(?:|I )have a config file "([^"]+)"$/
+     * @param string $filename
+     */
+    public function stepIHaveConfigFile($filename)
+    {
+        // Ensure site is in dev mode
+        /** @var Kernel $kernel */
+        $kernel = Injector::inst()->get(Kernel::class);
+        assertEquals(Kernel::DEV, $kernel->getEnvironment(), "Site is in dev mode");
+
+        // Ensure file exists in specified fixture dir
+        $sourceDir = $this->getConfigPath();
+        $sourcePath = "{$sourceDir}/{$filename}";
+        assertFileExists($sourcePath, "Config file {$filename} exists");
+
+        // Get destination
+        $project = ModuleManifest::config()->get('project') ?: 'mysite';
+        $mysite = ModuleLoader::getModule($project);
+        assertNotNull($mysite, 'Project exists');
+        $destPath = $mysite->getResourcePath("_config/{$filename}");
+        assertFileNotExists($destPath, "Config file {$filename} hasn't aleady been loaded");
+
+        // Load
+        $this->activatedConfigFiles[] = $destPath;
+        copy($sourcePath, $destPath);
+
+        // Flush website
+        $this->stepIFlush();
+    }
+}