# 指明要覆盖的方法 `@covers` 标注（参见 [Table B.1, “用于指明测试覆盖哪些方法的标注”](# "Table B.1. 用于指明测试覆盖哪些方法的标注")）可以用在测试代码中来指明测试方法想要对哪些方法进行测试。如果提供了这个信息，则只有指定方法的代码覆盖率信息会被统计。 [Example 11.2, “在测试中指明欲覆盖哪些方法”](# "Example 11.2. 在测试中指明欲覆盖哪些方法")展示了一个例子。 **Example 11.2. 在测试中指明欲覆盖哪些方法** ~~~ <?php class BankAccountTest extends PHPUnit_Framework_TestCase { protected $ba; protected function setUp() { $this->ba = new BankAccount; } /** * @covers BankAccount::getBalance */ public function testBalanceIsInitiallyZero() { $this->assertEquals(0, $this->ba->getBalance()); } /** * @covers BankAccount::withdrawMoney */ public function testBalanceCannotBecomeNegative() { try { $this->ba->withdrawMoney(1); } catch (BankAccountException $e) { $this->assertEquals(0, $this->ba->getBalance()); return; } $this->fail(); } /** * @covers BankAccount::depositMoney */ public function testBalanceCannotBecomeNegative2() { try { $this->ba->depositMoney(-1); } catch (BankAccountException $e) { $this->assertEquals(0, $this->ba->getBalance()); return; } $this->fail(); } /** * @covers BankAccount::getBalance * @covers BankAccount::depositMoney * @covers BankAccount::withdrawMoney */ public function testDepositWithdrawMoney() { $this->assertEquals(0, $this->ba->getBalance()); $this->ba->depositMoney(1); $this->assertEquals(1, $this->ba->getBalance()); $this->ba->withdrawMoney(1); $this->assertEquals(0, $this->ba->getBalance()); } } ?> ~~~ 同时，可以用 `@coversNothing` 标注来指明一个测试不覆盖*任何*方法（参见[the section called “@coversNothing”](# "@coversNothing")）。这可以在编写集成测试时用于确保代码覆盖全部来自单元测试。 **Example 11.3. 指明测试不欲覆盖任何方法** ~~~ <?php class GuestbookIntegrationTest extends PHPUnit_Extensions_Database_TestCase { /** * @coversNothing */ public function testAddEntry() { $guestbook = new Guestbook(); $guestbook->addEntry("suzy", "Hello world!"); $queryTable = $this->getConnection()->createQueryTable( 'guestbook', 'SELECT * FROM guestbook' ); $expectedTable = $this->createFlatXmlDataSet("expectedBook.xml") ->getTable("guestbook"); $this->assertTablesEqual($expectedTable, $queryTable); } } ?> ~~~