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在运行我的测试用例时使用：Ruby 2.4.0p0 Rails 5.2.3：有和错误：

我的测试用例是这样的：

require 'test_helper'

class SubscriptionsControllerTest < ActionDispatch::IntegrationTest

  test "Can reach to index " do
    get subscriptions_url
    assert_response :success
  end

结尾

错误：

SubscriptionsControllerTest#test_Can_reach_to_index_:
ActionView::Template::Error: Can't resolve image into URL: undefined method `[]' for nil:NilClass
    app/views/subscriptions/index.html.erb:43:in `_app_views_subscriptions_index_html_erb__900758959545617488_70234463713200'
    test/controllers/subscriptions_controller_test.rb:6:in `block in <class:SubscriptionsControllerTest>'

但是手动打开 ui 时图像会正确加载。你能建议什么是错的。在视图中有 image_tag 在第 43 行。

 <%= image_tag 'tukacad_1.png', alt: '', class: "img-responsive" %>
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1 回答 1

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在 application.rb 或 test.rb 中写入以下行

config.serve_static_assets = true

也跑

rails assets:precompile
于 2020-05-20T19:13:56.393 回答