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