268 lines
12 KiB
PHP
268 lines
12 KiB
PHP
<?php
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namespace PhpParser;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Scalar\String_;
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class NodeTraverserTest extends \PHPUnit_Framework_TestCase
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{
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public function testNonModifying() {
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$str1Node = new String_('Foo');
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$str2Node = new String_('Bar');
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$echoNode = new Node\Stmt\Echo_(array($str1Node, $str2Node));
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$stmts = array($echoNode);
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(0))->method('beforeTraverse')->with($stmts);
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$visitor->expects($this->at(1))->method('enterNode')->with($echoNode);
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$visitor->expects($this->at(2))->method('enterNode')->with($str1Node);
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$visitor->expects($this->at(3))->method('leaveNode')->with($str1Node);
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$visitor->expects($this->at(4))->method('enterNode')->with($str2Node);
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$visitor->expects($this->at(5))->method('leaveNode')->with($str2Node);
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$visitor->expects($this->at(6))->method('leaveNode')->with($echoNode);
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$visitor->expects($this->at(7))->method('afterTraverse')->with($stmts);
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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}
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public function testModifying() {
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$str1Node = new String_('Foo');
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$str2Node = new String_('Bar');
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$printNode = new Expr\Print_($str1Node);
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// first visitor changes the node, second verifies the change
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$visitor1 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor2 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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// replace empty statements with string1 node
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$visitor1->expects($this->at(0))->method('beforeTraverse')->with(array())
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->will($this->returnValue(array($str1Node)));
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$visitor2->expects($this->at(0))->method('beforeTraverse')->with(array($str1Node));
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// replace string1 node with print node
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$visitor1->expects($this->at(1))->method('enterNode')->with($str1Node)
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->will($this->returnValue($printNode));
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$visitor2->expects($this->at(1))->method('enterNode')->with($printNode);
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// replace string1 node with string2 node
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$visitor1->expects($this->at(2))->method('enterNode')->with($str1Node)
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->will($this->returnValue($str2Node));
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$visitor2->expects($this->at(2))->method('enterNode')->with($str2Node);
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// replace string2 node with string1 node again
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$visitor1->expects($this->at(3))->method('leaveNode')->with($str2Node)
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->will($this->returnValue($str1Node));
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$visitor2->expects($this->at(3))->method('leaveNode')->with($str1Node);
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// replace print node with string1 node again
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$visitor1->expects($this->at(4))->method('leaveNode')->with($printNode)
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->will($this->returnValue($str1Node));
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$visitor2->expects($this->at(4))->method('leaveNode')->with($str1Node);
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// replace string1 node with empty statements again
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$visitor1->expects($this->at(5))->method('afterTraverse')->with(array($str1Node))
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->will($this->returnValue(array()));
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$visitor2->expects($this->at(5))->method('afterTraverse')->with(array());
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor1);
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$traverser->addVisitor($visitor2);
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// as all operations are reversed we end where we start
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$this->assertEquals(array(), $traverser->traverse(array()));
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}
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public function testRemove() {
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$str1Node = new String_('Foo');
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$str2Node = new String_('Bar');
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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// remove the string1 node, leave the string2 node
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$visitor->expects($this->at(2))->method('leaveNode')->with($str1Node)
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->will($this->returnValue(false));
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals(array($str2Node), $traverser->traverse(array($str1Node, $str2Node)));
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}
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public function testMerge() {
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$strStart = new String_('Start');
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$strMiddle = new String_('End');
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$strEnd = new String_('Middle');
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$strR1 = new String_('Replacement 1');
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$strR2 = new String_('Replacement 2');
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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// replace strMiddle with strR1 and strR2 by merge
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$visitor->expects($this->at(4))->method('leaveNode')->with($strMiddle)
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->will($this->returnValue(array($strR1, $strR2)));
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals(
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array($strStart, $strR1, $strR2, $strEnd),
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$traverser->traverse(array($strStart, $strMiddle, $strEnd))
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);
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}
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public function testDeepArray() {
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$strNode = new String_('Foo');
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$stmts = array(array(array($strNode)));
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(1))->method('enterNode')->with($strNode);
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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}
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public function testDontTraverseChildren() {
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$strNode = new String_('str');
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$printNode = new Expr\Print_($strNode);
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$varNode = new Expr\Variable('foo');
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$mulNode = new Expr\BinaryOp\Mul($varNode, $varNode);
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$negNode = new Expr\UnaryMinus($mulNode);
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$stmts = array($printNode, $negNode);
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$visitor1 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor2 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor1->expects($this->at(1))->method('enterNode')->with($printNode)
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->will($this->returnValue(NodeTraverser::DONT_TRAVERSE_CHILDREN));
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$visitor2->expects($this->at(1))->method('enterNode')->with($printNode);
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$visitor1->expects($this->at(2))->method('leaveNode')->with($printNode);
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$visitor2->expects($this->at(2))->method('leaveNode')->with($printNode);
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$visitor1->expects($this->at(3))->method('enterNode')->with($negNode);
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$visitor2->expects($this->at(3))->method('enterNode')->with($negNode);
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$visitor1->expects($this->at(4))->method('enterNode')->with($mulNode);
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$visitor2->expects($this->at(4))->method('enterNode')->with($mulNode)
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->will($this->returnValue(NodeTraverser::DONT_TRAVERSE_CHILDREN));
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$visitor1->expects($this->at(5))->method('leaveNode')->with($mulNode);
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$visitor2->expects($this->at(5))->method('leaveNode')->with($mulNode);
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$visitor1->expects($this->at(6))->method('leaveNode')->with($negNode);
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$visitor2->expects($this->at(6))->method('leaveNode')->with($negNode);
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor1);
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$traverser->addVisitor($visitor2);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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}
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public function testStopTraversal() {
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$varNode1 = new Expr\Variable('a');
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$varNode2 = new Expr\Variable('b');
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$varNode3 = new Expr\Variable('c');
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$mulNode = new Expr\BinaryOp\Mul($varNode1, $varNode2);
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$printNode = new Expr\Print_($varNode3);
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$stmts = [$mulNode, $printNode];
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// From enterNode() with array parent
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(1))->method('enterNode')->with($mulNode)
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->will($this->returnValue(NodeTraverser::STOP_TRAVERSAL));
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$visitor->expects($this->at(2))->method('afterTraverse');
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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// From enterNode with Node parent
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(2))->method('enterNode')->with($varNode1)
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->will($this->returnValue(NodeTraverser::STOP_TRAVERSAL));
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$visitor->expects($this->at(3))->method('afterTraverse');
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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// From leaveNode with Node parent
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(3))->method('leaveNode')->with($varNode1)
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->will($this->returnValue(NodeTraverser::STOP_TRAVERSAL));
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$visitor->expects($this->at(4))->method('afterTraverse');
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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// From leaveNode with array parent
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(6))->method('leaveNode')->with($mulNode)
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->will($this->returnValue(NodeTraverser::STOP_TRAVERSAL));
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$visitor->expects($this->at(7))->method('afterTraverse');
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals($stmts, $traverser->traverse($stmts));
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// Check that pending array modifications are still carried out
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->expects($this->at(6))->method('leaveNode')->with($mulNode)
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->will($this->returnValue(NodeTraverser::REMOVE_NODE));
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$visitor->expects($this->at(7))->method('enterNode')->with($printNode)
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->will($this->returnValue(NodeTraverser::STOP_TRAVERSAL));
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$visitor->expects($this->at(8))->method('afterTraverse');
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals([$printNode], $traverser->traverse($stmts));
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}
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public function testRemovingVisitor() {
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$visitor1 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor2 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor3 = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor1);
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$traverser->addVisitor($visitor2);
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$traverser->addVisitor($visitor3);
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$preExpected = array($visitor1, $visitor2, $visitor3);
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$this->assertAttributeSame($preExpected, 'visitors', $traverser, 'The appropriate visitors have not been added');
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$traverser->removeVisitor($visitor2);
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$postExpected = array(0 => $visitor1, 2 => $visitor3);
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$this->assertAttributeSame($postExpected, 'visitors', $traverser, 'The appropriate visitors are not present after removal');
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}
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public function testNoCloneNodes() {
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$stmts = array(new Node\Stmt\Echo_(array(new String_('Foo'), new String_('Bar'))));
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$traverser = new NodeTraverser;
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$this->assertSame($stmts, $traverser->traverse($stmts));
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}
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/**
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* @expectedException \LogicException
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* @expectedExceptionMessage leaveNode() may only return an array if the parent structure is an array
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*/
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public function testReplaceByArrayOnlyAllowedIfParentIsArray() {
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$stmts = array(new Node\Expr\UnaryMinus(new Node\Scalar\LNumber(42)));
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$visitor = $this->getMockBuilder('PhpParser\NodeVisitor')->getMock();
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$visitor->method('leaveNode')->willReturn(array(new Node\Scalar\DNumber(42.0)));
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$traverser = new NodeTraverser();
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$traverser->addVisitor($visitor);
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$traverser->traverse($stmts);
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}
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}
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