Issue #3418136 by shalini_jha, smustgrave, rohit sankhla: Add last() function... (c0327e8d) · Commits · project / drupal

core/lib/Drupal/Core/TypedData/ListInterface.php

+8 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,14 @@ public function set($index, $value);
		*/
		public function first();

		/**
		* Returns the last item in this list.
		*
		* @return \Drupal\Core\TypedData\TypedDataInterface\|null
		* The last item in this list, or NULL if there are no items.
		*/
		public function last(): ?TypedDataInterface;

		/**
		* Appends a new item to the list.
		*

+7 −0

Original line number	Diff line number	Diff line
		@@ -303,4 +303,11 @@ public function __clone() {
		}
		}

		/**
		* {@inheritdoc}
		*/
		public function last(): ?TypedDataInterface {
		return $this->get($this->count() - 1);
		}

		}

+21 −0

Original line number	Diff line number	Diff line
		@@ -695,4 +695,25 @@ public function testTypedDataValidation(): void {
		$this->assertSame('0.value', $violations[0]->getPropertyPath());
		}

		/**
		* Tests the last() method on typed data lists.
		*/
		public function testTypedDataListsLast(): void {
		// Create an ItemList with two string items.
		$value = ['zero', 'one'];
		$typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);

		// Assert that the last item is the second one ('one').
		$this->assertEquals('one', $typed_data->last()->getValue());

		// Add another item to the list and check the last item.
		$value[] = 'two';
		$typed_data = $this->createTypedData(ListDataDefinition::create('string'), $value);
		$this->assertEquals('two', $typed_data->last()->getValue());

		// Check behavior with an empty list.
		$typed_data = $this->createTypedData(ListDataDefinition::create('string'), []);
		$this->assertNull($typed_data->last(), 'Empty list should return NULL.');
		}

		}