applying col_style to a list of rows of unequal length can cause an error as there is no cell at the index.

for example, with a structure like this:
********
**
********
***

col_style 2, 1
would fail as the second row has no cell at index 2. 

Thanks Don!

https://github.com/randym/axlsx/issues/15

1 files changed, 7 insertions, 0 deletions

diff --git a/test/workbook/worksheet/tc_worksheet.rb b/test/workbook/worksheet/tc_worksheet.rb
index 4722a999..24e26155 100644
--- a/test/workbook/worksheet/tc_worksheet.rb
+++ b/test/workbook/worksheet/tc_worksheet.rb
@@ -69,6 +69,13 @@ class TestWorksheet < Test::Unit::TestCase
     assert_equal(@ws.rows.first.cells[0].style, 0)
   end
 
+  def test_col_style_with_empty_column
+    @ws.add_row [1,2,3,4]
+    @ws.add_row [1]
+    @ws.add_row [1,2,3,4]
+    assert_nothing_raised {@ws.col_style(1, 1)}
+  end
+
   def test_cols
     @ws.add_row [1,2,3,4]
     @ws.add_row [1,2,3,4]