Add test to ensure renamed or removed columns that reference removed tables...

Add test to ensure renamed or removed columns that reference removed tables have their FK constraints properly removed.

tests/Doctrine/Tests/DBAL/Schema/ComparatorTest.php

@@ -1232,4 +1232,44 @@ class ComparatorTest extends \PHPUnit_Framework_TestCase
             array('0', 'foo', false),
         );
     }
+
+    public function testForeignKeyRemovalWithRenamedLocalColumn()
+    {
+        $fromSchema = new Schema( array(
+            'table1' => new Table('table1',
+                array(
+                    'id' => new Column('id', Type::getType('integer')),
+                )),
+            'table2' => new Table('table2',
+                array(
+                    'id' => new Column('id', Type::getType('integer')),
+                    'id_table1' => new Column('id_table1', Type::getType('integer'))
+                ),
+                array(),
+                array(
+                    new ForeignKeyConstraint(array('id_table1'), 'table1', array('id'), 'fk_table2_table1')
+                ))
+        ));
+        $toSchema = new Schema( array(
+            'table2' => new Table('table2',
+                array(
+                    'id' => new Column('id', Type::getType('integer')),
+                    'id_table3' => new Column('id_table3', Type::getType('integer'))
+                ),
+                array(),
+                array(
+                    new ForeignKeyConstraint(array('id_table3'), 'table3', array('id'), 'fk_table2_table3')
+                )),
+            'table3' => new Table('table3',
+                array(
+                    'id' => new Column('id', Type::getType('integer'))
+                ))
+        ));
+        $actual = Comparator::compareSchemas($fromSchema, $toSchema);
+        $this->assertArrayHasKey("table2", $actual->changedTables);
+        $this->assertCount(1, $actual->orphanedForeignKeys);
+        $this->assertEquals("fk_table2_table1", $actual->orphanedForeignKeys[0]->getName());
+        $this->assertCount(1, $actual->changedTables['table2']->addedForeignKeys, "FK to table3 should be added.");
+        $this->assertEquals("table3", $actual->changedTables['table2']->addedForeignKeys[0]->getForeignTableName());
+    }
 }