In order to mimic module-level evaluation, globals and locals should be the
same object, so doctest does not pass separate locals dict.
https://docs.python.org/2.7/reference/simple_stmts.html#exec
This fixes NameError in the following example:
>>> import foo
>>> def bar():
... foo # must exist in globalvars
Normally changes in tests are reported like this in diffs:
$ cat foo
- a
+ b
Using -i mode lets us update tests when the new results are correct
and/or populate tests with their output.
But with the standard doctest framework, inline Python sections in
tests changes instead result in a big failure report that's unhelpful.
So here, we replace the doctest calls with a simple compile/eval loop.
This fix mirrors the changes made to test-doctest.py in 04cfbbc5ae97
and 39599b7929c4.
Without this change, tests running heredoctest.py can fail on certain
versions of OS X when TERM is set to xterm-256color:
$ /opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -m heredoctest <<EOF
> >>> open('b', 'w').write('this' * 1000)
> EOF
+ \x1b[?1034h (no-eol) (esc)
A similar problem occurs with test-url.py:
$ ./run-tests.py test-url.py
--- .../tests/test-url.py.out
+++ .../tests/test-url.py.err
@@ -0,0 +1 @@
+
ERROR: .../test-url.py output changed
!
Failed test-url.py: output changed
# Ran 1 tests, 0 skipped, 1 failed.
Writes stdin to a temp file and doctests it.
In the future we might want to spare the temp file and directly call into
doctest.
Also, with some tweaking it seems possible to adjust the line numbers reported
in an error report so they match the ones in the original file.
