Fixing buildColumn for null values.
Fixing small containable merge, it was duplicating values, tests added.
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@8265 3807eeeb-6ff5-0310-8944-8be069107fe0
Moving tearDown et al. to the top of each test class.
Adding short descriptions to docblocks.
Adding missing docblocks.
Removing unnecessary blank lines and whitespaces.
Updating labels of test groups.
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@8116 3807eeeb-6ff5-0310-8944-8be069107fe0