Question

我正在尝试使用RSpec在rails 4中测试PG数据库约束，我不知道如何设置它。

我的想法是做这样的事情：

before do
  @subscriber = Marketing::Subscriber.new(email: "subscriber@example.com")
end

describe "when email address is already taken" do
  before do
    subscriber_with_same_email = @subscriber.dup
    subscriber_with_same_email.email = @subscriber.email.upcase
    subscriber_with_same_email.save
  end

  it "should raise db error when validation is skipped" do
    expect(@subscriber.save!(validate: false)).to raise_error
  end
end

当我运行它时，它会产生错误：

PG::UniqueViolation: ERROR:  duplicate key value violates unique constraint

然而，测试仍然失败。

是否有正确的语法让测试通过？

Answer 1

尝试

it "should raise db error when validation is skipped" do
  expect { @subscriber.save!(validate: false) }.to raise_error
end

有关详细信息，请查看more info on rspec-expectations expect-error matchers

希望这有帮助！

使用RSpec测试PG数据库约束

1 个答案: