We rename the file_XXX contents to test_XXX_to_rename so that these tests keep
running (so long as they begin with file_ and not test_ the test harness will
refuse to run them). If we rename these files to test_XXX in the same patch
Mercurial will not treat this as a rename and so we will lose the history
associated with file_XXX.
Instead, we rename test_XXX_to_rename to test_XXX in the next patch in this
series and by doing this Mercurial will treat this as two rename operations and
`hg log -f test_XXX` will show the history file_XXX as well.
One minor exception to this occurs due to the fact that we have two naming
conventions:
(a) For tests in css-animations, css-transitions, style etc.
Most of these tests should eventually land in web-platform-tests. However,
in many cases that's not yet possible because, for example, CSS
Animations 2 does not yet specify the behavior tested by the
css-animations tests.
For tests in web-platform-tests we generally separate words using -.
However, our mochitest running machinery requires that tests begin with
test_. Hence we name tests: test_abc-def-ghi.html.
(b) For tests in mozilla
These tests are never intended to be part of web-platform-tests and
generally for mochitests we use _ to separate words (hence the test_
prefix). Hence we name these tests test_abc_def_ghi.html
Now, there are some tests in the 'mozilla' directory that use the (a) naming
scheme instead of (b). In this case, instead of renaming file_xxx-xxx.html to
test_xxx-xxx_to_rename.html in this patch, and then renaming
test_xxx-xxx_to_rename.html to test_xxx-xxx.html in a second patch, we can just
delete test_xxx-xxx.html and rename file_xxx-xxx.html to test_xxx_xxx.html in
the one patch and Mercurial will recognize this as a rename because the file
names don't overlap.
MozReview-Commit-ID: Etcdmyfx0zf
Currently CSS Animations are exempted from Reduce Timer Precision, so this isn't needed.
Additionally, when we test by overriding that restriction, these tests aren't run, which
leads to confusion.
MozReview-Commit-ID: Gv6T3oGO475
There are a few different reasons why tests needed updating (not an exhaustive list):
- Tests assume that successive operations take place at different times.
- Tests assume that an operation took a minimum amount of time.
- Tests hardcodes a specific delay.
In most cases we hardcode the preference off. In some cases this is the best approach,
in others, we would like to improve. The bug for tracking those improvements is Bug 1429648
An improvement that is present in some tests is to hardcode a specific precision reduction
that is acceptable based on the confides of the test. (Obviously this needs to be a fix for
the test framework and not a requirement on the feature being tested.)
In a few places, the test itself can be fixed, for example to no longer require the end
time of an operation to be strictly greater than the start time, and allows it to be equal
to it.
MozReview-Commit-ID: J59c7xQtZZJ
