minor #19399 [Config] Extra tests for Config component (zomberg)

This PR was squashed before being merged into the 2.7 branch (closes #19399).

Discussion
----------

[Config] Extra tests for Config component

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

Commits
-------

d0f4434 [Config] Extra tests for Config component

Author: nicolas-grekas

Tests/Definition/Builder/ArrayNodeDefinitionTest.php

@@ -185,6 +185,48 @@ public function testTrueEnableEnabledNode($expected, $config, $message)
         );
     }
 
+    public function testCanBeDisabled()
+    {
+        $node = new ArrayNodeDefinition('root');
+        $node->canBeDisabled();
+
+        $this->assertTrue($this->getField($node, 'addDefaults'));
+        $this->assertEquals(array('enabled' => false), $this->getField($node, 'falseEquivalent'));
+        $this->assertEquals(array('enabled' => true), $this->getField($node, 'trueEquivalent'));
+        $this->assertEquals(array('enabled' => true), $this->getField($node, 'nullEquivalent'));
+
+        $nodeChildren = $this->getField($node, 'children');
+        $this->assertArrayHasKey('enabled', $nodeChildren);
+
+        $enabledNode = $nodeChildren['enabled'];
+        $this->assertTrue($this->getField($enabledNode, 'default'));
+        $this->assertTrue($this->getField($enabledNode, 'defaultValue'));
+    }
+
+    public function testIgnoreExtraKeys()
+    {
+        $node = new ArrayNodeDefinition('root');
+
+        $this->assertFalse($this->getField($node, 'ignoreExtraKeys'));
+
+        $result = $node->ignoreExtraKeys();
+
+        $this->assertEquals($node, $result);
+        $this->assertTrue($this->getField($node, 'ignoreExtraKeys'));
+    }
+
+    public function testNormalizeKeys()
+    {
+        $node = new ArrayNodeDefinition('root');
+
+        $this->assertTrue($this->getField($node, 'normalizeKeys'));
+
+        $result = $node->normalizeKeys(false);
+
+        $this->assertEquals($node, $result);
+        $this->assertFalse($this->getField($node, 'normalizeKeys'));
+    }
+
     public function getEnableableNodeFixtures()
     {
         return array(

Tests/Definition/Builder/ExprBuilderTest.php

@@ -150,6 +150,26 @@ public function testThenUnsetExpression()
         $this->assertEquals(array(), $this->finalizeTestBuilder($test));
     }
 
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage You must specify an if part.
+     */
+    public function testEndIfPartNotSpecified()
+    {
+        $this->getTestBuilder()->end();
+    }
+
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessage You must specify a then part.
+     */
+    public function testEndThenPartNotSpecified()
+    {
+        $builder = $this->getTestBuilder();
+        $builder->ifPart = 'test';
+        $builder->end();
+    }
+
     /**
      * Create a test treebuilder with a variable node, and init the validation.
      *