Add some tests for configuration groups.

tests/ConfigGroupTest.php

@@ -0,0 +1,91 @@
+<?php
+namespace Consolidation\Config\Util;
+
+use Consolidation\Config\Config;
+
+class ConfigGroupTest extends \PHPUnit_Framework_TestCase
+{
+    protected $config;
+
+    protected function setUp()
+    {
+        $data = [
+            // Define some configuration settings for the options for
+            // the commands my:foo and my:bar.
+            'command' => [
+                'my' => [
+                    // commands.my.options.* apply to all my:* commands.
+                    'options' => [
+                        'path' => '/etc/common',
+                        'priority' => 'normal',
+                    ],
+                    'foo' => [
+                        // commands.my.foo.options.* apply only to the my:foo command.
+                        'options' => [
+                            'name' => 'baz',
+                        ],
+                    ],
+                    'bar' => [
+                        // Similarly, commands.my.bar.options is for the my:bar command.
+                        'options' => [
+                            'priority' => 'high',
+                        ],
+                    ],
+                ],
+            ],
+            // Define some configuration settings for the configuration
+            // of some task \My\Tasks\Operations\Frobulate.
+            'task' => [
+                'Operations' => [
+                    // task.Operations.settings apply to all tasks in
+                    // any *.Tass.Operations namespace.
+                    'settings' => [
+                        'dir' => '/base/dir',
+                    ],
+                    'Frobulate' => [
+                        // task.Operations.Frobulate.settings applies only
+                        // the Frobulate task.
+                        'settings' => [
+                            'object' => 'fire truck',
+                        ],
+                    ],
+                ],
+            ],
+        ];
+
+        $this->config = new Config($data);
+    }
+
+    public function testDotNotation()
+    {
+        // Test the test
+        $this->assertEquals('baz', $this->config->get('command.my.foo.options.name'));
+    }
+
+    public function testFallback()
+    {
+        $fooFallback = new ConfigFallback($this->config, 'my.foo', 'command.', '.options.');
+        $barFallback = new ConfigFallback($this->config, 'my.bar', 'command.', '.options.');
+
+        $this->assertEquals(null, $barFallback->get('name'));
+        $this->assertEquals('baz', $fooFallback->get('name'));
+        $this->assertEquals('high', $barFallback->get('priority'));
+
+        $this->assertEquals('normal', $fooFallback->get('priority'));
+        $this->assertEquals('/etc/common', $barFallback->get('path'));
+        $this->assertEquals('/etc/common', $fooFallback->get('path'));
+    }
+
+    public function testMerge()
+    {
+        $frobulateMerge = new ConfigMerge($this->config, 'Operations.Frobulate', 'task.');
+
+        $settings = $frobulateMerge->get('settings');
+        $this->assertEquals('fire truck', $settings['object']);
+        $this->assertEquals('/base/dir', $settings['dir']);
+        $keys = array_keys($settings);
+        sort($keys);
+        $this->assertEquals('dir,object', implode(',', $keys));
+    }
+}
+