Part of lp.codehosting.tests
| Class | BzrDirFormatA | Undocumented |
| Class | BzrDirFormatB | Undocumented |
| Class | BranchFormatA | Undocumented |
| Class | BranchFormatB | Undocumented |
| Class | RepoFormatA | Undocumented |
| Class | RepoFormatB | Undocumented |
| Class | StubObjectWithFormat | A stub object with a _format attribute, like bzrdir and repositories. |
| Class | StubBranch | A stub branch object that just has formats. |
| Class | IdenticalFormatsTestCase | Test case for identical_formats function. |