Fixing errors and failing tests with SQLite.

Seems that MySQL is extremely permissive with NOT NULL fields.
SQLite is more strict it seems.

lib/Cake/Model/Datasource/DboSource.php

@@ -153,7 +153,7 @@ class DboSource extends DataSource {
  *
  * @var array
  */
-	public $connection = null;
+	protected $_connection = null;
 
 /**
  * The DataSource configuration key name

lib/Cake/Test/Case/Model/ModelReadTest.php

@@ -6567,13 +6567,14 @@ class ModelReadTest extends BaseModelTest {
  * @return void
  */
 	public function testFindCount() {
-		$this->loadFixtures('User', 'Article');
+		$this->loadFixtures('User', 'Article', 'Comment', 'Tag', 'ArticlesTag');
 
 		$TestModel = new User();
 		$this->db->getLog(false, true);
 		$result = $TestModel->find('count');
 		$this->assertEqual($result, 4);
 
+		$this->db->getLog(false, true);
 		$fullDebug = $this->db->fullDebug;
 		$this->db->fullDebug = true;
 		$TestModel->order = 'User.id';
@@ -6631,7 +6632,7 @@ class ModelReadTest extends BaseModelTest {
 	public function testFindCountWithDbExpressions() {
 		$this->skipIf($this->db instanceof Postgres, 'testFindCountWithDbExpressions is not compatible with Postgres.');
 
-		$this->loadFixtures('Project');
+		$this->loadFixtures('Project', 'Thread');
 		$db = ConnectionManager::getDataSource('test');
 		$TestModel = new Project();
 

lib/Cake/Test/Case/Model/ModelWriteTest.php

@@ -3007,7 +3007,7 @@ class ModelWriteTest extends BaseModelTest {
 	public function testSaveAllManyRowsTransactionNoRollback() {
 		$this->loadFixtures('Post');
 
-		$this->getMock('DboSource', array(), array(), 'MockTransactionDboSource');
+		$this->getMock('DboSource', array('connect', 'rollback', 'describe'), array(), 'MockTransactionDboSource');
 		$db = ConnectionManager::create('mock_transaction', array(
 			'datasource' => 'MockTransactionDboSource',
 		));
@@ -3038,7 +3038,12 @@ class ModelWriteTest extends BaseModelTest {
 	public function testSaveAllAssociatedTransactionNoRollback() {
 		$testDb = ConnectionManager::getDataSource('test');
 
-		$mock = $this->getMock('DboSource', array(), array(), 'MockTransactionAssociatedDboSource', false);
+		$mock = $this->getMock(
+			'DboSource',
+			array('connect', 'rollback', 'describe', 'create', 'update', 'begin'),
+			array(),
+			'MockTransactionAssociatedDboSource'
+		);
 		$db = ConnectionManager::create('mock_transaction_assoc', array(
 			'datasource' => 'MockTransactionAssociatedDboSource',
 		));
@@ -4313,7 +4318,7 @@ class ModelWriteTest extends BaseModelTest {
 	public function testSaveManyTransactionNoRollback() {
 		$this->loadFixtures('Post');
 
-		$this->getMock('DboSource', array(), array(), 'MockManyTransactionDboSource');
+		$this->getMock('DboSource', array('connect', 'rollback', 'describe'), array(), 'MockManyTransactionDboSource');
 		$db = ConnectionManager::create('mock_many_transaction', array(
 			'datasource' => 'MockManyTransactionDboSource',
 		));
@@ -4344,7 +4349,13 @@ class ModelWriteTest extends BaseModelTest {
 	public function testSaveAssociatedTransactionNoRollback() {
 		$testDb = ConnectionManager::getDataSource('test');
 
-		$mock = $this->getMock('DboSource', array(), array(), 'MockAssociatedTransactionDboSource', false);
+		$mock = $this->getMock(
+			'DboSource',
+			array('connect', 'rollback', 'describe', 'create', 'begin'), 
+			array(),
+			'MockAssociatedTransactionDboSource',
+			false
+		);
 		$db = ConnectionManager::create('mock_assoc_transaction', array(
 			'datasource' => 'MockAssociatedTransactionDboSource',
 		));

lib/Cake/Test/Fixture/ArticleFixture.php

@@ -38,8 +38,8 @@ class ArticleFixture extends CakeTestFixture {
  */
 	public $fields = array(
 		'id' => array('type' => 'integer', 'key' => 'primary'),
-		'user_id' => array('type' => 'integer', 'null' => false),
-		'title' => array('type' => 'string', 'null' => false),
+		'user_id' => array('type' => 'integer', 'null' => true),
+		'title' => array('type' => 'string', 'null' => true),
 		'body' => 'text',
 		'published' => array('type' => 'string', 'length' => 1, 'default' => 'N'),
 		'created' => 'datetime',
@@ -56,4 +56,5 @@ class ArticleFixture extends CakeTestFixture {
 		array('user_id' => 3, 'title' => 'Second Article', 'body' => 'Second Article Body', 'published' => 'Y', 'created' => '2007-03-18 10:41:23', 'updated' => '2007-03-18 10:43:31'),
 		array('user_id' => 1, 'title' => 'Third Article', 'body' => 'Third Article Body', 'published' => 'Y', 'created' => '2007-03-18 10:43:23', 'updated' => '2007-03-18 10:45:31')
 	);
+
 }

lib/Cake/Test/Fixture/CounterCachePostFixture.php

@@ -28,10 +28,10 @@ class CounterCachePostFixture extends CakeTestFixture {
 
 	public $fields = array(
 		'id' => array('type' => 'integer', 'key' => 'primary'),
-		'title' => array('type' => 'string', 'length' => 255, 'null' => false),
+		'title' => array('type' => 'string', 'length' => 255),
 		'user_id' => array('type' => 'integer', 'null' => true),
 		'user_id' => array('type' => 'integer', 'null' => true),
-		'published' => array('type' => 'boolean', 'null' => false)
+		'published' => array('type' => 'boolean', 'null' => false, 'default' => 0)
 	);
 
     public $records = array(