Rails 测试 "ActionController::UnknownFormat: is missing a template for this request format and variant"

Question

我正在为名为 "Canary" 的 Twitter 克隆应用程序创建测试套件，但我很难为 chirps#reply 和 chirps#rechirps

编写集成测试

Chirps 控制器

def reply
    @chirp = current_user.chirps.new
    @parent = Chirp.find_by(id: params[:parent_id])
    @chirp.parent_id = params[:parent_id]
    respond_to do |format|
        format.js
        format.html
    end
end

def rechirp
    @chirp = current_user.chirps.new
    @reference = Chirp.find_by(id: params[:reference_id])
    @chirp.reference_id = params[:reference_id]
    respond_to do |format|
        format.js
        format.html
    end 
end

啁啾视图

<%= link_to reply_chirp_path(current_user, parent_id: chirp.id), remote: true, data: { target: '#modal_container', toggle: 'modal' } do %>
    <%= icon('far', 'comment') %> <%= chirp.children.size if chirp.children.size > 0 %>
<% end %>

<%= link_to rechirp_chirp_path(current_user, reference_id: chirp.id), remote: true, data: { target: '#modal_container', toggle: 'modal' } do %>
    <%= icon('fas', 'retweet') %> <%= count_rechirps(chirp) %>
<% end %>

Reply.js.erb

$("#modal_container").find(".modal-content").html("<%= j render 'chirps/modal_reply' %>");
$("#modal_container").modal('show', 'focus');

Rechirp.js.erb

$("#modal_container").find(".modal-content").html("<%= j render 'chirps/modal_rechirp' %>");
$("#modal_container").modal('show', 'focus');

Chirps 接口测试

# Try to reply to chirp
assert_select 'a[href=?]', reply_chirp_path(@user, parent_id: @chirp.id)
assert_difference 'Chirp.count', 1 do
    get reply_chirp_path(@user, parent_id: @chirp)
    assert_select 'div#modal_container > div.modal-dialog > div.modal-content > div.modal-body'
    post chirps_path, params: { chirp: { content: content, parent_id: @chirp.id } }
    assert :success
end
assert_redirected_to root_url
follow_redirect!
# Try to rechirp chirp
assert_select 'a[href=?]', rechirp_chirp_path(@user, reference_id: @chirp.id)

当我运行 chirp_interface_test.rb 时，我一直遇到同样的错误：

Error: ChirpsInterfaceTest#test_chirp_interface:

ActionController::UnknownFormat: ChirpsController#reply is missing a template for this request format and variant.

request.formats: ["text/html"]

request.variant: []
test/integration/chirps_interface_test.rb:30:in `block (2 levels) in <class:ChirpsInterfaceTest>'

test/integration/chirps_interface_test.rb:29:in `block in <class:ChirpsInterfaceTest>'

我知道路由在应用程序中有效，因为我已经通过本地主机多次通过回复和重新发送成功提交。我如何通过 rails 测试来测试这些操作是否正常工作？

Answer 1

Error: ChirpsInterfaceTest#test_chirp_interface:

ActionController::UnknownFormat: ChirpsController#reply is missing a template for this request format and variant.

request.formats: ["text/html"]

request.variant: []

您的链接有 remote: true。这意味着请求是 JS。要测试此类链接，您应该像这样使用 xhr: true

get reply_chirp_path(@user, parent_id: @chirp), xhr: true

由于您没有指定它，请求被视为 HTML 并因该异常而失败。

有关详细信息，请阅读 Testing XHR (AJAX) requests

Rails 测试 "ActionController::UnknownFormat: is missing a template for this request format and variant"

Rails Test "ActionController::UnknownFormat: is missing a template for this request format and variant"

ruby

routing

integration-testing

ruby-on-rails

ruby-on-rails-5