Rails 测试 - 如何测试特定的验证? [英] Rails Test - How to test specific validation?

问题描述

使用默认的 Rails 测试套件，我将如何编写仅测试某些验证的测试?例如，如果我有对存在、数字和我自己的验证器的验证，我如何只测试数字?

Using default Rails test suite, how would I write tests that test certain validations only? For example, if I have validations for presence, numeric, and my own validator, how do I just test numeric?

假设我没有数字验证工作，所以这个测试应该失败:

Say I don't have numeric validation working, so this test should fail:

test "should test numeric validator" do
    post = Post.new(:number => 'not a number')
    assert !post.save, "it saved a non-numeric value for :number"
end

但它会通过，因为我自己的验证器出于其他原因不允许它保存，所以我的测试并没有真正正确地测试.

But it'll pass because my own validator didn't allow it to save for some other reason, so my test doesn't really test properly.

推荐答案

您可以为特定字段断言 post.errors 哈希，即:

You coud assert the post.errors hash for the specific field, i.e.:

assert_nil post.errors[:number], "it saved a non numeric value for :number"

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