1

我试图让事务在 Grails 服务中工作,但我没有得到我期望的结果。如果我做错了什么,如果我的假设不成立,有人可以告诉我吗?

我的域类:

class Account {

  static constraints = {
    balance(min: 0.00)
  }

  String companyName
  BigDecimal balance = 0.00
  Boolean active = true

  String toString() {
    return "${companyName} : ${balance}"
  }
}

我的服务:

class AccountService {

  static transactional = true

  def transfer(Account source, Account destination, amount) throws RuntimeException {

    if (source.active && destination.active) {
      source.balance -= amount

      if (!source.save(flush: true)) {
        throw new RuntimeException("Could not save source account.")
      } else {
        destination.balance += amount

        if (!destination.save(flush: true)) {
          throw new RuntimeException("Could not save destination account.")
        }
      }
    } else {
      throw new RuntimeException("Both accounts must be active.")
    }
  }

  def someMethod(Account account) throws RuntimeException {

    account.balance = -10.00

    println "validated: ${account.validate()}"

    if(!account.validate()) {
      throw new RuntimeException("Rollback!")
    }
  }
}

我的单元测试: import grails.test.*

class AccountServiceTests extends GrailsUnitTestCase {

  def AccountService

  protected void setUp() {
    super.setUp()
    mockDomain(Account)
    AccountService = new AccountService()
  }

  protected void tearDown() {
    super.tearDown()
  }

  void testTransactional() {
    def account = new Account(companyName: "ACME Toy Company", balance: 2000.00, active: true)

    def exception = null

    try {
      AccountService.someMethod(account)
    } catch (RuntimeException e) {
      exception = e
    }

    assert exception instanceof RuntimeException

    println "exception thrown: ${exception.getMessage()}"

    assertEquals 2000.00, account.balance
  }
}

结果:

Testsuite: AccountServiceTests
Tests run: 1, Failures: 1, Errors: 0, Time elapsed: 1.068 sec
------------- Standard Output ---------------
--Output from testTransactional--
validated: false
exception thrown: Rollback!
------------- ---------------- ---------------
------------- Standard Error -----------------
--Output from testTransactional--
------------- ---------------- ---------------

Testcase: testTransactional took 1.066 sec
    FAILED
expected:<2000.00> but was:<-10.00>
junit.framework.AssertionFailedError: expected:<2000.00> but was:<-10.00>
    at AccountServiceTests.testTransactional(AccountServiceTests.groovy:89)
    at _GrailsTest_groovy$_run_closure4.doCall(_GrailsTest_groovy:203)
    at _GrailsTest_groovy$_run_closure4.call(_GrailsTest_groovy)
    at _GrailsTest_groovy$_run_closure2.doCall(_GrailsTest_groovy:147)
    at _GrailsTest_groovy$_run_closure1_closure19.doCall(_GrailsTest_groovy:113)
    at _GrailsTest_groovy$_run_closure1.doCall(_GrailsTest_groovy:96)
    at TestApp$_run_closure1.doCall(TestApp.groovy:66)
    at gant.Gant$_dispatch_closure4.doCall(Gant.groovy:324)
    at gant.Gant$_dispatch_closure6.doCall(Gant.groovy:334)
    at gant.Gant$_dispatch_closure6.doCall(Gant.groovy)
    at gant.Gant.withBuildListeners(Gant.groovy:344)
    at gant.Gant.this$2$withBuildListeners(Gant.groovy)
    at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
    at gant.Gant.dispatch(Gant.groovy:334)
    at gant.Gant.this$2$dispatch(Gant.groovy)
    at gant.Gant.invokeMethod(Gant.groovy)
    at gant.Gant.processTargets(Gant.groovy:495)
    at gant.Gant.processTargets(Gant.groovy:480)

我的期望:

当账户的余额为负时,它不应该验证(它不验证),应该抛出一个 RuntimeException(它是),并且账户应该回滚到它之前的状态(余额:2000),即它分崩离析的地方。

我在这里想念什么?

4

3 回答 3

4

单元测试只是 Groovy 或 Java 类,因此没有 Spring 应用程序上下文,因此没有事务支持。您必须为单元测试模拟它,但这不会测试事务性,只是模拟的质量。将其转换为集成测试,不要在服务上调用 new,使用依赖注入:

class AccountServiceTests extends GroovyTestCase {

  def AccountService

  void testTransactional() {
    def account = new Account(companyName: "ACME Toy Company", balance: 2000.00,
                              active: true)
    account.save()
    assertFalse account.hasErrors()

    String message = shouldFail(RuntimeException) {
      AccountService.someMethod(account)
    }

    println "exception thrown: $message"

    assertEquals 2000.00, account.balance
  }
}

请注意,实际的异常可能是一个包装器异常,其原因是您抛出的异常。

于 2010-01-15T17:30:28.943 回答
1

我尝试了代码,但在集成测试中看到了同样的问题。我使用 Grails 1.2

根据Jira GRAILS-3765,这是一个已知问题并且仍然存在。(我不确定为什么当 1.1.x 已经发布很长时间时它只说“影响版本 1.0.4”)。

基于这些观点,我认为这是 Grails 中的一个错误。Jira note 有一个解决方法,但我没有尝试过。但是,根据问题,它在运行应用程序时仍然可以工作;这可以手动确认。

于 2010-01-16T04:23:19.767 回答
0

您正在运行哪个版本的 Grails?v1.1.1 有一个错误,其中 transactional=true 无法正常工作。

于 2010-01-16T02:04:19.590 回答