Misc fixes

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

tests/Environment/ScriptRunnerTest.php

@@ -27,4 +27,32 @@ class ScriptRunnerTest extends \PhpUnit\Framework\TestCase
         ];
     }
 
+    /**
+     * @covers ScriptRunner::defineScript
+     * @covers ScriptRunner::evalutateDefinedScript
+     */
+    public function testDefiningAndCallingScript()
+    {
+        $runner = new ScriptRunner(true);
+        $runner->defineScript('test1', __CLASS__."::call1");
+        $runner->defineScript('test2', [ __CLASS__."::call2" ]);
+
+        $this->assertFalse(self::$call1);
+        $runner->evaluateDefinedScript('test1');
+        $this->assertTrue(self::$call1);
+
+        $this->assertFalse(self::$call2);
+        $runner->evaluateDefinedScript('test2');
+        $this->assertTrue(self::$call2);
+    }
+
+    public static function call1()
+    { self::$call1 = true; }
+
+    public static function call2()
+    { self::$call2 = true; }
+
+    private static bool $call1 = false;
+    private static bool $call2 = false;
+
 }