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312 lines
14 KiB
312 lines
14 KiB
<?php declare(strict_types=1);
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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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use PhpParser\NodeVisitor;
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use PHPUnit\Framework\TestCase;
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class NodeTraverserTest extends 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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$echoNode = new Node\Stmt\Echo_([$str1Node, $str2Node]);
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$stmts = [$echoNode];
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$visitor = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor2 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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// replace empty statements with string1 node
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$visitor1->expects($this->at(0))->method('beforeTraverse')->with([])
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->will($this->returnValue([$str1Node]));
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$visitor2->expects($this->at(0))->method('beforeTraverse')->with([$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([$str1Node])
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->will($this->returnValue([]));
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$visitor2->expects($this->at(5))->method('afterTraverse')->with([]);
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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([], $traverser->traverse([]));
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}
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public function testRemove() {
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$str1Node = new String_('Foo');
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$str2Node = new String_('Bar');
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$visitor = $this->getMockBuilder(NodeVisitor::class)->getMock();
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// remove the string1 node, leave the string2 node
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$visitor->expects($this->at(2))->method('leaveNode')->with($str1Node)
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->will($this->returnValue(NodeTraverser::REMOVE_NODE));
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals([$str2Node], $traverser->traverse([$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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// replace strMiddle with strR1 and strR2 by merge
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$visitor->expects($this->at(4))->method('leaveNode')->with($strMiddle)
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->will($this->returnValue([$strR1, $strR2]));
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$traverser = new NodeTraverser;
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$traverser->addVisitor($visitor);
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$this->assertEquals(
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[$strStart, $strR1, $strR2, $strEnd],
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$traverser->traverse([$strStart, $strMiddle, $strEnd])
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);
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}
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/**
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* @expectedException \LogicException
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* @expectedExceptionMessage Invalid node structure: Contains nested arrays
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*/
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public function testInvalidDeepArray() {
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$strNode = new String_('Foo');
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$stmts = [[[$strNode]]];
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$traverser = new NodeTraverser;
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$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 = [$printNode, $negNode];
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$visitor1 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor2 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor2 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor3 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$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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$preExpected = [$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 = [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 = [new Node\Stmt\Echo_([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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* @dataProvider provideTestInvalidReturn
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*/
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public function testInvalidReturn($visitor, $message) {
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$this->expectException(\LogicException::class);
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$this->expectExceptionMessage($message);
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$stmts = [new Node\Stmt\Expression(new Node\Scalar\LNumber(42))];
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$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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public function provideTestInvalidReturn() {
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$visitor1 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor1->expects($this->at(1))->method('enterNode')
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->willReturn('foobar');
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$visitor2 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor2->expects($this->at(2))->method('enterNode')
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->willReturn('foobar');
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$visitor3 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor3->expects($this->at(3))->method('leaveNode')
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->willReturn('foobar');
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$visitor4 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor4->expects($this->at(4))->method('leaveNode')
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->willReturn('foobar');
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$visitor5 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor5->expects($this->at(3))->method('leaveNode')
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->willReturn([new Node\Scalar\DNumber(42.0)]);
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$visitor6 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor6->expects($this->at(4))->method('leaveNode')
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->willReturn(false);
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$visitor7 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor7->expects($this->at(1))->method('enterNode')
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->willReturn(new Node\Scalar\LNumber(42));
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$visitor8 = $this->getMockBuilder(NodeVisitor::class)->getMock();
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$visitor8->expects($this->at(2))->method('enterNode')
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->willReturn(new Node\Stmt\Return_());
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return [
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[$visitor1, 'enterNode() returned invalid value of type string'],
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[$visitor2, 'enterNode() returned invalid value of type string'],
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[$visitor3, 'leaveNode() returned invalid value of type string'],
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[$visitor4, 'leaveNode() returned invalid value of type string'],
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[$visitor5, 'leaveNode() may only return an array if the parent structure is an array'],
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[$visitor6, 'bool(false) return from leaveNode() no longer supported. Return NodeTraverser::REMOVE_NODE instead'],
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[$visitor7, 'Trying to replace statement (Stmt_Expression) with expression (Scalar_LNumber). Are you missing a Stmt_Expression wrapper?'],
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[$visitor8, 'Trying to replace expression (Scalar_LNumber) with statement (Stmt_Return)'],
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];
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}
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}
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