mirror of
https://github.com/phabelio/PHP-Parser.git
synced 2024-12-11 00:29:37 +01:00
360 lines
13 KiB
PHP
360 lines
13 KiB
PHP
<?php declare(strict_types=1);
|
|
|
|
namespace PhpParser;
|
|
|
|
use PhpParser\Node\Expr;
|
|
use PhpParser\Node\Scalar\String_;
|
|
|
|
class NodeTraverserTest extends \PHPUnit\Framework\TestCase
|
|
{
|
|
public function testNonModifying() {
|
|
$str1Node = new String_('Foo');
|
|
$str2Node = new String_('Bar');
|
|
$echoNode = new Node\Stmt\Echo_([$str1Node, $str2Node]);
|
|
$stmts = [$echoNode];
|
|
|
|
$visitor = new NodeVisitorForTesting();
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $echoNode],
|
|
['enterNode', $str1Node],
|
|
['leaveNode', $str1Node],
|
|
['enterNode', $str2Node],
|
|
['leaveNode', $str2Node],
|
|
['leaveNode', $echoNode],
|
|
['afterTraverse', $stmts],
|
|
], $visitor->trace);
|
|
}
|
|
|
|
public function testModifying() {
|
|
$str1Node = new String_('Foo');
|
|
$str2Node = new String_('Bar');
|
|
$printNode = new Expr\Print_($str1Node);
|
|
|
|
// first visitor changes the node, second verifies the change
|
|
$visitor1 = new NodeVisitorForTesting([
|
|
['beforeTraverse', [], [$str1Node]],
|
|
['enterNode', $str1Node, $printNode],
|
|
['enterNode', $str1Node, $str2Node],
|
|
['leaveNode', $str2Node, $str1Node],
|
|
['leaveNode', $printNode, $str1Node],
|
|
['afterTraverse', [$str1Node], []],
|
|
]);
|
|
$visitor2 = new NodeVisitorForTesting();
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor1);
|
|
$traverser->addVisitor($visitor2);
|
|
|
|
// as all operations are reversed we end where we start
|
|
$this->assertEquals([], $traverser->traverse([]));
|
|
$this->assertEquals([
|
|
['beforeTraverse', [$str1Node]],
|
|
['enterNode', $printNode],
|
|
['enterNode', $str2Node],
|
|
['leaveNode', $str1Node],
|
|
['leaveNode', $str1Node],
|
|
['afterTraverse', []],
|
|
], $visitor2->trace);
|
|
}
|
|
|
|
public function testRemove() {
|
|
$str1Node = new String_('Foo');
|
|
$str2Node = new String_('Bar');
|
|
|
|
$visitor = new NodeVisitorForTesting([
|
|
['leaveNode', $str1Node, NodeTraverser::REMOVE_NODE],
|
|
]);
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
|
|
$this->assertEquals([$str2Node], $traverser->traverse([$str1Node, $str2Node]));
|
|
}
|
|
|
|
public function testMerge() {
|
|
$strStart = new String_('Start');
|
|
$strMiddle = new String_('End');
|
|
$strEnd = new String_('Middle');
|
|
$strR1 = new String_('Replacement 1');
|
|
$strR2 = new String_('Replacement 2');
|
|
|
|
$visitor = new NodeVisitorForTesting([
|
|
['leaveNode', $strMiddle, [$strR1, $strR2]],
|
|
]);
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
|
|
$this->assertEquals(
|
|
[$strStart, $strR1, $strR2, $strEnd],
|
|
$traverser->traverse([$strStart, $strMiddle, $strEnd])
|
|
);
|
|
}
|
|
|
|
public function testInvalidDeepArray() {
|
|
$this->expectException(\LogicException::class);
|
|
$this->expectExceptionMessage('Invalid node structure: Contains nested arrays');
|
|
$strNode = new String_('Foo');
|
|
$stmts = [[[$strNode]]];
|
|
|
|
$traverser = new NodeTraverser;
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
}
|
|
|
|
public function testDontTraverseChildren() {
|
|
$strNode = new String_('str');
|
|
$printNode = new Expr\Print_($strNode);
|
|
$varNode = new Expr\Variable('foo');
|
|
$mulNode = new Expr\BinaryOp\Mul($varNode, $varNode);
|
|
$negNode = new Expr\UnaryMinus($mulNode);
|
|
$stmts = [$printNode, $negNode];
|
|
|
|
$visitor1 = new NodeVisitorForTesting([
|
|
['enterNode', $printNode, NodeTraverser::DONT_TRAVERSE_CHILDREN],
|
|
]);
|
|
$visitor2 = new NodeVisitorForTesting([
|
|
['enterNode', $mulNode, NodeTraverser::DONT_TRAVERSE_CHILDREN],
|
|
]);
|
|
|
|
$expectedTrace = [
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $printNode],
|
|
['leaveNode', $printNode],
|
|
['enterNode', $negNode],
|
|
['enterNode', $mulNode],
|
|
['leaveNode', $mulNode],
|
|
['leaveNode', $negNode],
|
|
['afterTraverse', $stmts],
|
|
];
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor1);
|
|
$traverser->addVisitor($visitor2);
|
|
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals($expectedTrace, $visitor1->trace);
|
|
$this->assertEquals($expectedTrace, $visitor2->trace);
|
|
}
|
|
|
|
public function testDontTraverseCurrentAndChildren() {
|
|
// print 'str'; -($foo * $foo);
|
|
$strNode = new String_('str');
|
|
$printNode = new Expr\Print_($strNode);
|
|
$varNode = new Expr\Variable('foo');
|
|
$mulNode = new Expr\BinaryOp\Mul($varNode, $varNode);
|
|
$divNode = new Expr\BinaryOp\Div($varNode, $varNode);
|
|
$negNode = new Expr\UnaryMinus($mulNode);
|
|
$stmts = [$printNode, $negNode];
|
|
|
|
$visitor1 = new NodeVisitorForTesting([
|
|
['enterNode', $printNode, NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN],
|
|
['enterNode', $mulNode, NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN],
|
|
['leaveNode', $mulNode, $divNode],
|
|
]);
|
|
$visitor2 = new NodeVisitorForTesting();
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor1);
|
|
$traverser->addVisitor($visitor2);
|
|
|
|
$resultStmts = $traverser->traverse($stmts);
|
|
$this->assertInstanceOf(Expr\BinaryOp\Div::class, $resultStmts[1]->expr);
|
|
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $printNode],
|
|
['leaveNode', $printNode],
|
|
['enterNode', $negNode],
|
|
['enterNode', $mulNode],
|
|
['leaveNode', $mulNode],
|
|
['leaveNode', $negNode],
|
|
['afterTraverse', $resultStmts],
|
|
], $visitor1->trace);
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $negNode],
|
|
['leaveNode', $negNode],
|
|
['afterTraverse', $resultStmts],
|
|
], $visitor2->trace);
|
|
}
|
|
|
|
public function testStopTraversal() {
|
|
$varNode1 = new Expr\Variable('a');
|
|
$varNode2 = new Expr\Variable('b');
|
|
$varNode3 = new Expr\Variable('c');
|
|
$mulNode = new Expr\BinaryOp\Mul($varNode1, $varNode2);
|
|
$printNode = new Expr\Print_($varNode3);
|
|
$stmts = [$mulNode, $printNode];
|
|
|
|
// From enterNode() with array parent
|
|
$visitor = new NodeVisitorForTesting([
|
|
['enterNode', $mulNode, NodeTraverser::STOP_TRAVERSAL],
|
|
]);
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $mulNode],
|
|
['afterTraverse', $stmts],
|
|
], $visitor->trace);
|
|
|
|
// From enterNode with Node parent
|
|
$visitor = new NodeVisitorForTesting([
|
|
['enterNode', $varNode1, NodeTraverser::STOP_TRAVERSAL],
|
|
]);
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $mulNode],
|
|
['enterNode', $varNode1],
|
|
['afterTraverse', $stmts],
|
|
], $visitor->trace);
|
|
|
|
// From leaveNode with Node parent
|
|
$visitor = new NodeVisitorForTesting([
|
|
['leaveNode', $varNode1, NodeTraverser::STOP_TRAVERSAL],
|
|
]);
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $mulNode],
|
|
['enterNode', $varNode1],
|
|
['leaveNode', $varNode1],
|
|
['afterTraverse', $stmts],
|
|
], $visitor->trace);
|
|
|
|
// From leaveNode with array parent
|
|
$visitor = new NodeVisitorForTesting([
|
|
['leaveNode', $mulNode, NodeTraverser::STOP_TRAVERSAL],
|
|
]);
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
$this->assertEquals($stmts, $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $mulNode],
|
|
['enterNode', $varNode1],
|
|
['leaveNode', $varNode1],
|
|
['enterNode', $varNode2],
|
|
['leaveNode', $varNode2],
|
|
['leaveNode', $mulNode],
|
|
['afterTraverse', $stmts],
|
|
], $visitor->trace);
|
|
|
|
// Check that pending array modifications are still carried out
|
|
$visitor = new NodeVisitorForTesting([
|
|
['leaveNode', $mulNode, NodeTraverser::REMOVE_NODE],
|
|
['enterNode', $printNode, NodeTraverser::STOP_TRAVERSAL],
|
|
]);
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor);
|
|
$this->assertEquals([$printNode], $traverser->traverse($stmts));
|
|
$this->assertEquals([
|
|
['beforeTraverse', $stmts],
|
|
['enterNode', $mulNode],
|
|
['enterNode', $varNode1],
|
|
['leaveNode', $varNode1],
|
|
['enterNode', $varNode2],
|
|
['leaveNode', $varNode2],
|
|
['leaveNode', $mulNode],
|
|
['enterNode', $printNode],
|
|
['afterTraverse', [$printNode]],
|
|
], $visitor->trace);
|
|
}
|
|
|
|
public function testRemovingVisitor() {
|
|
$visitor1 = new class extends NodeVisitorAbstract {};
|
|
$visitor2 = new class extends NodeVisitorAbstract {};
|
|
$visitor3 = new class extends NodeVisitorAbstract {};
|
|
|
|
$traverser = new NodeTraverser;
|
|
$traverser->addVisitor($visitor1);
|
|
$traverser->addVisitor($visitor2);
|
|
$traverser->addVisitor($visitor3);
|
|
|
|
$getVisitors = (function () {
|
|
return $this->visitors;
|
|
})->bindTo($traverser, NodeTraverser::class);
|
|
|
|
$preExpected = [$visitor1, $visitor2, $visitor3];
|
|
$this->assertSame($preExpected, $getVisitors());
|
|
|
|
$traverser->removeVisitor($visitor2);
|
|
|
|
$postExpected = [0 => $visitor1, 2 => $visitor3];
|
|
$this->assertSame($postExpected, $getVisitors());
|
|
}
|
|
|
|
public function testNoCloneNodes() {
|
|
$stmts = [new Node\Stmt\Echo_([new String_('Foo'), new String_('Bar')])];
|
|
|
|
$traverser = new NodeTraverser;
|
|
|
|
$this->assertSame($stmts, $traverser->traverse($stmts));
|
|
}
|
|
|
|
/**
|
|
* @dataProvider provideTestInvalidReturn
|
|
*/
|
|
public function testInvalidReturn($stmts, $visitor, $message) {
|
|
$this->expectException(\LogicException::class);
|
|
$this->expectExceptionMessage($message);
|
|
|
|
$traverser = new NodeTraverser();
|
|
$traverser->addVisitor($visitor);
|
|
$traverser->traverse($stmts);
|
|
}
|
|
|
|
public function provideTestInvalidReturn() {
|
|
$num = new Node\Scalar\LNumber(42);
|
|
$expr = new Node\Stmt\Expression($num);
|
|
$stmts = [$expr];
|
|
|
|
$visitor1 = new NodeVisitorForTesting([
|
|
['enterNode', $expr, 'foobar'],
|
|
]);
|
|
$visitor2 = new NodeVisitorForTesting([
|
|
['enterNode', $num, 'foobar'],
|
|
]);
|
|
$visitor3 = new NodeVisitorForTesting([
|
|
['leaveNode', $num, 'foobar'],
|
|
]);
|
|
$visitor4 = new NodeVisitorForTesting([
|
|
['leaveNode', $expr, 'foobar'],
|
|
]);
|
|
$visitor5 = new NodeVisitorForTesting([
|
|
['leaveNode', $num, [new Node\Scalar\DNumber(42.0)]],
|
|
]);
|
|
$visitor6 = new NodeVisitorForTesting([
|
|
['leaveNode', $expr, false],
|
|
]);
|
|
$visitor7 = new NodeVisitorForTesting([
|
|
['enterNode', $expr, new Node\Scalar\LNumber(42)],
|
|
]);
|
|
$visitor8 = new NodeVisitorForTesting([
|
|
['enterNode', $num, new Node\Stmt\Return_()],
|
|
]);
|
|
|
|
return [
|
|
[$stmts, $visitor1, 'enterNode() returned invalid value of type string'],
|
|
[$stmts, $visitor2, 'enterNode() returned invalid value of type string'],
|
|
[$stmts, $visitor3, 'leaveNode() returned invalid value of type string'],
|
|
[$stmts, $visitor4, 'leaveNode() returned invalid value of type string'],
|
|
[$stmts, $visitor5, 'leaveNode() may only return an array if the parent structure is an array'],
|
|
[$stmts, $visitor6, 'bool(false) return from leaveNode() no longer supported. Return NodeTraverser::REMOVE_NODE instead'],
|
|
[$stmts, $visitor7, 'Trying to replace statement (Stmt_Expression) with expression (Scalar_LNumber). Are you missing a Stmt_Expression wrapper?'],
|
|
[$stmts, $visitor8, 'Trying to replace expression (Scalar_LNumber) with statement (Stmt_Return)'],
|
|
];
|
|
}
|
|
}
|