Chris@13: <?php declare(strict_types=1);
Chris@13: 
Chris@13: namespace PhpParser;
Chris@13: 
Chris@13: use PhpParser\Node\Expr;
Chris@13: 
Chris@17: class NodeFinderTest extends \PHPUnit\Framework\TestCase
Chris@13: {
Chris@13:     private function getStmtsAndVars() {
Chris@13:         $assign = new Expr\Assign(new Expr\Variable('a'), new Expr\BinaryOp\Concat(
Chris@13:             new Expr\Variable('b'), new Expr\Variable('c')
Chris@13:         ));
Chris@13:         $stmts = [new Node\Stmt\Expression($assign)];
Chris@13:         $vars = [$assign->var, $assign->expr->left, $assign->expr->right];
Chris@13:         return [$stmts, $vars];
Chris@13:     }
Chris@13: 
Chris@13:     public function testFind() {
Chris@13:         $finder = new NodeFinder;
Chris@13:         list($stmts, $vars) = $this->getStmtsAndVars();
Chris@13:         $varFilter = function(Node $node) {
Chris@13:             return $node instanceof Expr\Variable;
Chris@13:         };
Chris@13:         $this->assertSame($vars, $finder->find($stmts, $varFilter));
Chris@13:         $this->assertSame($vars, $finder->find($stmts[0], $varFilter));
Chris@13: 
Chris@13:         $noneFilter = function () { return false; };
Chris@13:         $this->assertSame([], $finder->find($stmts, $noneFilter));
Chris@13:     }
Chris@13: 
Chris@13:     public function testFindInstanceOf() {
Chris@13:         $finder = new NodeFinder;
Chris@13:         list($stmts, $vars) = $this->getStmtsAndVars();
Chris@13:         $this->assertSame($vars, $finder->findInstanceOf($stmts, Expr\Variable::class));
Chris@13:         $this->assertSame($vars, $finder->findInstanceOf($stmts[0], Expr\Variable::class));
Chris@13:         $this->assertSame([], $finder->findInstanceOf($stmts, Expr\BinaryOp\Mul::class));
Chris@13:     }
Chris@13: 
Chris@13:     public function testFindFirst() {
Chris@13:         $finder = new NodeFinder;
Chris@13:         list($stmts, $vars) = $this->getStmtsAndVars();
Chris@13:         $varFilter = function(Node $node) {
Chris@13:             return $node instanceof Expr\Variable;
Chris@13:         };
Chris@13:         $this->assertSame($vars[0], $finder->findFirst($stmts, $varFilter));
Chris@13:         $this->assertSame($vars[0], $finder->findFirst($stmts[0], $varFilter));
Chris@13: 
Chris@13:         $noneFilter = function () { return false; };
Chris@13:         $this->assertNull($finder->findFirst($stmts, $noneFilter));
Chris@13:     }
Chris@13: 
Chris@13:     public function testFindFirstInstanceOf() {
Chris@13:         $finder = new NodeFinder;
Chris@13:         list($stmts, $vars) = $this->getStmtsAndVars();
Chris@13:         $this->assertSame($vars[0], $finder->findFirstInstanceOf($stmts, Expr\Variable::class));
Chris@13:         $this->assertSame($vars[0], $finder->findFirstInstanceOf($stmts[0], Expr\Variable::class));
Chris@13:         $this->assertNull($finder->findFirstInstanceOf($stmts, Expr\BinaryOp\Mul::class));
Chris@13:     }
Chris@13: }