使用ruby watir测试是否存在html表元素

Question

我想测试的是表元素是否存在？如果没有表格,那么我只想让脚本结束.但是如果有一个表我想将它输出到excel.

该脚本正在测试两个url:

http://www.mycounciltax.org.uk/results?postcode=EX99AE&search=Search

http://www.mycounciltax.org.uk/results?postcode=CV56bz&search=Search

第一个网址显示没有html表格的网页,第二个网页显示包含html表格元素的网页.

我已经尝试将以下脚本放在一起,但我不认为这是正确的.我确信我在测试table元素时犯了一个错误.

if browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}.exists?
then content = browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}

如果你从下面的脚本中删除上面的代码,它将运行,但是当它找不到html表时会崩溃.

require "watir-webdriver"
browser = Watir::Browser.new :ff
browser.goto "http://www.mycounciltax.org.uk/results?postcode=CV56BZ&search=Search"

if browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}.exists?
then content = browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}
require 'win32ole'

application = WIN32OLE.new('Excel.Application')

application.visible = TRUE
workbook = application.Workbooks.Add();
worksheet = workbook.Worksheets(1);
worksheet.visible

row = 1; column = 0
content.each do |array|
array.each do |element|
worksheet.Cells(1,1).offset(row,column).value = element #.offset(row,column)
column += 1
end
row += 1
column = 0
end

else end

browser.goto "http://www.mycounciltax.org.uk/results?postcode=EX99AE&search=Search"

if browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}.exists?
then content = browser.table.trs.collect {|tr| [tr[0].text, tr[1].text, tr[2].text]}
require 'win32ole'

application = WIN32OLE.new('Excel.Application')

application.visible = TRUE
workbook = application.Workbooks.Add();
worksheet = workbook.Worksheets(1);
worksheet.visible

row = 1; column = 0
content.each do |array|
array.each do |element|
worksheet.Cells(1,1).offset(row,column).value = element #.offset(row,column)
column += 1
end
row += 1
column = 0
end

else end

我打算立刻运行上面的代码.任何人都可以指出我哪里错了吗？我是ruby和watir的新手:-).

提前谢谢了.

Answer 1

有一种#exists?方法.

if browser.table.exists?
  # go on
end