Misc fixes

* Updated build scripts to handle gitless environments a little
  better
* PDO shell plugin improvements
* More tests

tests/Environment/EnvironmentTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Spark\Environment;
+
+class EnvironmentTest extends \PhpUnit\Framework\TestCase
+{
+    
+    /**
+     * @covers Environment::createFromDirectory
+     * @covers Environment::getProjectDirectory
+     */
+    public function testCreatingEnvironmentByTraversing()
+    {
+        $env = Environment::createFromDirectory(__DIR__, true);
+
+        $this->assertInstanceOf(Environment::class, $env);
+        $this->assertEquals(dirname(__DIR__), $env->getProjectDirectory());
+    }
+
+    /**
+     * @covers Environment::createFromDirectory
+     */
+    public function testFailingToCreatingEnvironmentFromMissingConfig()
+    {
+        $env = Environment::createFromDirectory(__DIR__);
+
+        $this->assertNull($env);
+    }
+
+    /**
+     * @covers Environment::createFromDirectory
+     * @covers Environment::getProjectDirectory
+     */
+    public function testCreatingEnvironmentDirectly()
+    {
+        $env = Environment::createFromDirectory(__DIR__."/..");
+
+        $this->assertInstanceOf(Environment::class, $env);
+        $this->assertEquals(dirname(__DIR__), $env->getProjectDirectory());
+    }
+
+}