Allow tests to run when no databases are setup

Prior to 2.7.1, tests ran when:

- ext/pgsql was enabled
- but no databases were setup for pgsql

With the changes introduced to resolve #70, however, the above
combination causes cascading failures across the test suite.

Marking the two tests introduced to run in separate processes largely
solves the issues. Updating the first test to test for a connection
exception prevents a test failure when no database is setup.

Author: weierophinney

src/Adapter/Driver/Pgsql/Connection.php

@@ -123,7 +123,9 @@ public function connect()
         $connection = $this->getConnectionString();
         set_error_handler(function ($number, $string) {
             throw new Exception\RuntimeException(
-                __METHOD__ . ': Unable to connect to database', null, new Exception\ErrorException($string, $number)
+                __METHOD__ . ': Unable to connect to database',
+                null,
+                new Exception\ErrorException($string, $number)
             );
         });
         $this->resource = pg_connect($connection);

test/Adapter/Driver/Pgsql/ConnectionTest.php

@@ -114,6 +114,9 @@ public function testSetConnectionType()
         $this->assertEquals($type, self::readAttribute($this->connection, 'type'));
     }
 
+    /**
+     * @runInSeparateProcess
+     */
     public function testSetCharset()
     {
         if (! extension_loaded('pgsql')) {
@@ -130,11 +133,18 @@ public function testSetCharset()
             'charset'  => 'SQL_ASCII',
         ]);
 
-        $this->connection->connect();
+        try {
+            $this->connection->connect();
+        } catch (AdapterException\RuntimeException $e) {
+            $this->markTestSkipped('Skipping pgsql charset test due to inability to connecto to database');
+        }
 
         $this->assertEquals('SQL_ASCII', pg_client_encoding($this->connection->getResource()));
     }
 
+    /**
+     * @runInSeparateProcess
+     */
     public function testSetInvalidCharset()
     {
         if (! extension_loaded('pgsql')) {