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LSST Data Management Base Package
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test_channel Namespace Reference

Functions

 test_channel ()
 

Function Documentation

◆ test_channel()

test_channel.test_channel ( )

Definition at line 6 of file test_channel.py.

6def test_channel():
7 # Previous tests may have added channels
8 # Ideally we'd clean up but it is more difficult to ensure fixtures remove
9 # all channels and uses thereof than to just accept that some may exist
10 channels_all = g2f.Channel.all
11 n_channels = len(channels_all)
12 assert n_channels >= 1
13
14 with pytest.raises(ValueError):
15 # The None channel is special and accessed as g2f.Channel.NONE
16 g2f.Channel("None")
17
18 name_new = "A long name that is very unlikely to have already been taken"
19 channel_new = g2f.Channel(name_new)
20 assert len(g2f.Channel.all) == (n_channels + 1)
21 with pytest.raises(ValueError):
22 g2f.Channel.erase("None")
23 with pytest.raises(ValueError):
24 g2f.Channel(name_new)
25
26 # deleting a Channel object should be fine
27 del channel_new
28 # ...only calling erase removes it from the registry, though
29 g2f.Channel.erase(name_new)
30 assert g2f.Channel.find(name_new) is None
31 assert len(g2f.Channel.all) == n_channels
32 assert len(g2f.Channel(name_new).all) == (n_channels + 1)
33 assert len(g2f.Channel("Another unusually long name").all) == (n_channels + 2)
An observational channel, usually representing some range of wavelengths of light.
Definition channel.h:29