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Commit c245f6c

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Testing with database (PDO)
1 parent 32b91da commit c245f6c

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2 files changed

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2 files changed

+138
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‎src/ItemsTable.php

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<?php
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namespace TDD;
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use \PDO;
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class ItemsTable {
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protected $table = 'items';
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protected $PDO;
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public function __construct(PDO $pdo) {
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$this->PDO = $pdo;
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}
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public function __destruct() {
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unset($this->PDO);
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}
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public function findForId($id) {
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$query = "SELECT * FROM {$this->table} WHERE {$this->table}.id = ?";
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$statement = $this->PDO->prepare($query);
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$statement->execute([$id]);
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return $statement->fetch(PDO::FETCH_ASSOC);
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}
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}

‎tests/ItemsTableTest.php

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<?php
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namespace TDD\Test;
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require dirname( dirname(__FILE__) ) . DIRECTORY_SEPARATOR . 'vendor' . DIRECTORY_SEPARATOR . 'autoload.php';
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use PHPUnit\Framework\TestCase;
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use TDD\ItemsTable;
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use \PDO;
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class ItemsTableTest extends TestCase
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{
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public function setUp()
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{
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$this->PDO = $this->getConnection();
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$this->createTable();
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$this->populateTable();
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$this->ItemsTable = new ItemsTable($this->PDO);
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}
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public function tearDown()
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{
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unset($this->ItemsTable);
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unset($this->PDO);
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}
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public function testFindForId()
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{
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$id = 1;
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$result = $this->ItemsTable->findForId($id);
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$this->assertInternalType(
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'array',
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$result,
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'The result should always be an array.'
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);
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$this->assertEquals(
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$id,
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$result['id'],
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'The id key/value of the result for id should be equal to the id.'
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);
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$this->assertEquals(
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'Candy',
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$result['name'],
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'The id key/value of the result for name should be equal to `Candy`.'
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);
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}
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public function testFindForIdMock()
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{
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$id = 1;
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$PDOStatement = $this->getMockBuilder('\PDOStatement')
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->setMethods(['execute', 'fetch'])
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->getMock();
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$PDOStatement->expects($this->once())
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->method('execute')
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->with([$id])
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->will($this->returnSelf());
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$PDOStatement->expects($this->once())
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->method('fetch')
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->with($this->anything())
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->will($this->returnValue('canary'));
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$PDO = $this->getMockBuilder('\PDO')
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->setMethods(['prepare'])
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->disableOriginalConstructor()
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->getMock();
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$PDO->expects($this->once())
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->method('prepare')
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->with($this->stringContains('SELECT * FROM'))
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->willReturn($PDOStatement);
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$ItemsTable = new ItemsTable($PDO);
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$output = $ItemsTable->findForId($id);
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$this->assertEquals(
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'canary',
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$output,
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'The output for the mocked instance of the PDO and PDOStatment should produce the string `canary`.'
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);
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}
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protected function getConnection()
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{
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return new PDO('sqlite::memory:');
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}
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protected function createTable()
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{
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$query = "
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CREATE TABLE `items` (
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`id` INTEGER,
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`name` TEXT,
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`price` REAL,
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PRIMARY KEY(`id`)
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);
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";
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$this->PDO->query($query);
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}
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protected function populateTable()
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{
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$query = "
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INSERT INTO `items` VALUES (1,'Candy',1.00);
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INSERT INTO `items` VALUES (2,'TShirt',5.34);
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";
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$this->PDO->query($query);
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}
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}

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