我正在尝试测试一个 sinatra (1.3.2) 应用程序，其字段使用数据绑定通过Knockout.js更新以在客户端连接，我需要对此运行一些测试。但是我似乎无法让它工作。我已经使用 Capybara 配置了 RSpec（使用 webkit 作为 js 驱动程序）并且由于某种原因，当我在相关字段上使用 find_field('lead[temporary_notes).text 进行测试时（从 Knockout 获取它的值），我得到一个空字符串..任何想法为什么会这样或如何正确测试？
谢谢！
——杰克
这是规范（它访问更高描述块中的前块中的页面）：
describe "submitting with empty field (home phone)" do
before do
fill_in "Home Phone", with: ""
fill_in "lead[temporary_notes]", with: x_lead.temporary_notes
fill_in "Appointment Time", with: "07/07/12 9:43 am"
click_button "Post Lead"
end
it { should have_selector('div.alert', text: "missing required fields")}
it { find_field('First Name').value.should == x_lead.fname }
it { find_field('Last Name').value.should == x_lead.lname }
it { find_field('Address').value.should == x_lead.address1 }
it { find_field('City').value.should == x_lead.city }
it { find_field('Zip').value.should == x_lead.zip }
it { find_field('Home Phone').value.should == "" }
it { find_field('Cell Phone').value.should == x_lead.phone3 }
it { find_field('Spouse Phone').value.should == x_lead.phone4 }
it { find_field('Email Address').value.should == x_lead.email }
it { find_field('lead[temporary_notes]').text.should == x_lead.temporary_notes }
end
这是页面（erb）：
<div id="lead-form" class="row">
<form accept-charset="UTF-8" action="/leads" class="new_lead" id="new_lead" method="post" name="new_lead">
<div style="margin:0;padding:0;display:inline">
<input name="utf8" type="hidden" value="✓">
<div id="lead-personal" class="span3">
<label class="switch-spousename no_selection required_field" for="lead_fname"><span id="first_name_switch">First Name</span></label><input id="lead_fname" name="lead[fname]" size="30" type="text" value="<%= @lead.fname %>">
<label class="switch-lastname no_selection required_field" for="lead_lname"><span id="last_name_switch">Last Name</span></label> <input id="lead_lname" name="lead[lname]" size="30" type="text" value="<%= @lead.lname %>">
<label class="switch-spousename no_selection" for="lead_spouse"><span id="spouse_name_switch">Spouse Name</span></label><input id="lead_spouse" name="lead[spouse]" size="30" type="text" value="<%= @lead.spouse %>">
<label for="lead[email]">Email Address</label><input type="text" name="lead[email]" value="<%= @lead.email %>" id="lead[email]">
</div>
<div id="lead-phone" class="span3">
<label for="lead_phone1" class="required_field">Home Phone</label><input id="lead_phone1" name="lead[phone1]" size="30" type="text" value="<%= @lead.phone1 %>">
<label for="lead_phone2">Cell Phone</label><input id="lead_phone2" name="lead[phone2]" size="30" type="text" value="<%= @lead.phone2 %>">
<label for="lead_phone4">Spouse Phone</label> <input id="lead_phone4" name="lead[phone4]" size="30" type="text" value="<%= @lead.phone4 %>">
</div>
<div id="lead-address" class="span4">
<label for="lead_address1" class="required_field">Address</label> <input id="lead_address1" name="lead[address1]" size="30" value="<%= @lead.address1 %>"type="text">
<label for="lead_city" class="required_field">City</label> <input id="lead_city" name="lead[city]" size="30" type="text" value="<%= @lead.city %>">
<label for="lead_state" class="required_field">State</label> <input id="lead_state" name="lead[state]" size="30" type="text" value="<%= @lead.state %>">
<label for="lead_zip" class="required_field">Zip</label> <input id="lead_zip" name="lead[zip]" size="30" type="text" value="<%= @lead.zip %>">
<div class="control-group">
<label class="control-label" class="required_field" for="lead_lead_home_ownership">Homeowner Status:</label>
<div id="lead-homeowner-status" class="controls">
<label class="radio inline" for="lead_lead_home_ownership">Own</label> <input checked="checked" class="radio inline" id="lead_lead_home_ownership_own" name="lead[lead_home_ownership]" type="radio" value="Own"> <label class="radio inline" for="lead_lead_home_ownership">Rent</label> <input class="radio inline" id="lead_lead_home_ownership_rent" name="lead[lead_home_ownership]" type="radio" value="Rent"> <label class="radio inline" for="lead_lead_home_ownership">Lease</label> <input class="radio inline" id="lead_lead_home_ownership_lease" name="lead[lead_home_ownership]" type="radio" value="Lease"> <label class="radio inline" for="lead_lead_home_ownership">Other</label> <input class="radio inline" id="lead_lead_home_ownership_other" name="lead[lead_home_ownership]" type="radio" value="Other" >
</div>
</div>
</div>
<div id="lead-comments" class="span3">
<label for="lead[temporary_notes]">Notes</label>
<textarea cols="30" name="lead[temporary_notes]" data-bind="value: leadTelemarketerNotes" rows="3" value="<%= @lead.temporary_notes %>" id="lead_temporary_notes"/>
</textarea>
</div>
<div id="lead-appointment" class="span3">
<label for="lead_contact_time" class="required_field">Appointment Time</label> <input id="lead_contact_time" name="lead[contact_time]" size="30" type="text" value="<%= @lead.contact_time %>">
</div>
<input type="hidden" name="lead[lead_callcenter_notes]" data-bind="value: leadCallcenterNotes" />
<input type="hidden" name="lead[lead_callcenter_rep]" data-bind="value: leadTelemarketerName" />
<input class="btn btn-success" id="lead-submit" name="commit" type="submit" value="Post Lead">
</div>
</form>
</div>
<script type="text/javascript" charset="utf-8">
var ko_form = new LeadViewModel("<%= @lead.lead_callcenter_rep %>", "<%= @lead.temporary_notes %>", <%= @lead.has_alarm %>);
ko.applyBindings(ko_form);
var tooltipDelay = ({ show: 550, hide: 75 });
$('#first_name_switch').tooltip({title: "Click: Switch with Spouse name", delay: tooltipDelay});
$('#last_name_switch').tooltip({title: "Click: Switch with First name", delay: tooltipDelay});
$('#spouse_name_switch').tooltip({title: "Click: Switch with First name", delay: tooltipDelay});
</script>
运行规范时我得到了这个：
Failure/Error: it { find_field('lead[temporary_notes]').text.should == x_lead.temporary_notes}
expected: "Some notes"
got: "" (using ==)