[Scons-users] How to reset the global state?

[Dirk Bächle]

Hi Björn,

On 24.04.2014 14:19, Björn Pollex wrote:

> I am currently trying to write some unit-tests for a custom SCons 

> tool. The setup looks a bit like this:

>

> from SCons.Environment import Environment

>

> def test_something():

>     env = Environment(tools=['my_custom_tool'])

>     t, = env.MyCustomBuilder(args...)

>     assert 'something' in t.get_build_env()

>

> def test_something_else():

>     env = Environment(tools=['my_custom_tool'])

>     t, = env.MyCustomBuilder(args...)

>     assert 'something_else' in t.get_build_env()

>

> This is made up. The important part is, I try to build the same node 

> multiple times in different tests. When I run each of the tests alone, 

> they all pass. However, when I run the entire test module, SCons 

> complains that it has multiple ways to build the same target when it 

> runs the second test case.

>

does "complains" mean you get an error, or simply a warning (a copy of 
the exact message would have been helpful)?
In a single SCons run, each file/target is unique regarding its absolute 
filepath. You can't create the same file with different settings, like a 
changed environment or a different action for your Builder.


> So the question seems to be, how can I reset that global state of 

> SCons between test cases?

>

There is no state to reset, you'll have to restructure your build, e.g. 
appending a suffix "_test1", "test_2",... to each single executable or 
using variant dirs.

Hope this helps you a little further.

Best regards,

Dirk