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<?php /** * Copyright (c) 2013-2023 Nicolò Martini * * For the full copyright and license information, please view * the LICENSE.md file that was distributed with this source code. * * @see https://github.com/nicmart/Tree / namespace Tree\Test\Unit\Node; use PHPUnit\Framework; use Tree\Node\Node; use Tree\Node\NodeInterface; use Tree\Test; use Tree\Visitor\Visitor; /* * @internal * * @covers \Tree\Node\Node */ final class NodeTest extends Framework\TestCase { use Test\Util\Helper; public function testDefaults(): void { $node = new Node(); self::assertSame([], $node->getChildren()); self::assertNull($node->getValue()); } public function testConstructorSetsValue(): void { $value = self::faker()->sentence(); $node = new Node($value); self::assertSame($value, $node->getValue()); } public function testConstructorSetsChildren(): void { $children = [ new Node(), new Node(), new Node(), ]; $node = new Node( null, $children, ); self::assertSame($children, $node->getChildren()); $parents = \array_map(static function (NodeInterface $child): ?NodeInterface { return $child->getParent(); }, $children); $expected = \array_fill(0, \count($children), $node); self::assertSame($expected, $parents); } public function testSetValue(): void { $node = new Node(); $node->setValue('string value'); self::assertSame('string value', $node->getValue()); $node->setValue($object = new \stdClass()); $object->foo = 'bar'; self::assertSame($object, $node->getValue()); } public function testAddAndGetChildren(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')); self::assertSame([$child1, $child2, $child3], $root->getChildren()); } public function testAddChildSetParent(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')); self::assertSame($root, $child1->getParent()); self::assertSame($root, $child2->getParent()); } public function testSetAndGetParent(): void { $root = new Node(); $child = new Node('foo'); $child->setParent($root); self::assertSame($root, $child->getParent()); } public function testSetChildren(): void { $children = [new Node('child1'), new Node('child2'), new Node('child3')]; $root = new Node(); $root->setChildren($children); self::assertSame($children, $root->getChildren()); } public function testSetChildrenSetParentsReferences(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')); self::assertSame($root, $child1->getParent()); self::assertSame($root, $child2->getParent()); } public function testRemoveChild(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')) ->removeChild($child2); self::assertSame([$child1, $child3], $root->getChildren()); } public function testRemoveChildRemoveParentReference(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->removeChild($child1); self::assertNull($child1->getParent()); } public function testRemoveAllChildrenRemoveParentReferences(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->removeAllChildren(); self::assertNull($child1->getParent()); } public function testRemoveAllChildren(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')) ->removeAllChildren(); self::assertEmpty($root->getChildren()); } public function testGetAncestors(): void { $root = new Node('r'); $root->addChild($a = new Node('a')); $a->addChild($b = new Node('b')); $b->addChild($c = new Node('c')); self::assertSame([$root, $a, $b], $c->getAncestors()); } public function testGetAncestorsAndSelf(): void { $root = new Node('r'); $root->addChild($a = new Node('a')); $a->addChild($b = new Node('b')); self::assertSame([$root, $a, $b], $b->getAncestorsAndSelf()); } public function testGetNeighborsReturnsEmptyArrayWhenNodeDoesNotHaveParent(): void { $node = new Node(self::faker()->sentence()); self::assertSame([], $node->getNeighbors()); } public function testGetNeighbors(): void { $root = new Node('r'); $root ->addChild($a = new Node('a')) ->addChild($b = new Node('b')) ->addChild($c = new Node('c')); self::assertSame([$b, $c], $a->getNeighbors()); } public function testGetNeighborsAndSelfReturnsArrayWithNodeWhenNodeDoesNotHaveParent(): void { $node = new Node(self::faker()->sentence()); $expected = [ $node, ]; self::assertSame($expected, $node->getNeighborsAndSelf()); } public function testGetNeighborsAndSelf(): void { $root = new Node('r'); $root ->addChild($a = new Node('a')) ->addChild($b = new Node('b')) ->addChild($c = new Node('c')); self::assertSame([$a, $b, $c], $a->getNeighborsAndSelf()); } public function testIsLeaf(): void { $root = new Node(); self::assertTrue($root->isLeaf()); $root->addChild(new Node('child')); self::assertFalse($root->isLeaf()); } public function testRoot(): void { $root = (new Node('root')) ->addChild( (new Node('child'))->addChild($grandchild = new Node('grandchild')), ); self::assertSame($root, $grandchild->root()); } public function testIsRoot(): void { $root = new Node('root'); $root->addChild($child = new Node('child')); self::assertTrue($root->isRoot()); self::assertFalse($child->isRoot()); } public function testIsChild(): void { $root = new Node('root'); $root->addChild($child = new Node('child')); self::assertTrue($child->isChild()); self::assertFalse($root->isChild()); } public function testGetDepth(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')); $child3 ->addChild($child4 = new Node('a')) ->addChild(new Node('b')); self::assertSame(1, $child1->getDepth()); self::assertSame(0, $root->getDepth()); self::assertSame(2, $child4->getDepth()); } public function testGetHeight(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')); $child3 ->addChild(new Node('a')) ->addChild(new Node('b')); self::assertSame(0, $child1->getHeight()); self::assertSame(2, $root->getHeight()); self::assertSame(1, $child3->getHeight()); } public function testGetSize(): void { $root = new Node(); $root ->addChild($child1 = new Node('child1')) ->addChild($child2 = new Node('child2')) ->addChild($child3 = new Node('child3')); $child3 ->addChild(new Node('a')) ->addChild($child4 = new Node('b')); $child4->addChild($child5 = new Node('c')); $child5 ->addChild(new Node('d')) ->addChild(new Node('f')); self::assertSame(9, $root->getSize()); self::assertSame(3, $child5->getSize()); self::assertSame(4, $child4->getSize()); self::assertSame(6, $child3->getSize()); self::assertSame(1, $child2->getSize()); } public function testAcceptLetsVisitorVisitNode(): void { $node = new Node(); $value = self::faker()->sentence(); $visitor = $this->createMock(Visitor::class); $visitor ->expects(self::once()) ->method('visit') ->with(self::identicalTo($node)) ->willReturn($value); $accepted = $node->accept($visitor); self::assertSame($value, $accepted); } }

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