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Make the test class instance behaviour clearer 

In the "Getting Started" doc, the test class instance example for
instance sharing doesn't actually demonstrate anything about the
reinstantiation of the class. This change shows clearly how the instance
data isn't retained between test runs.
This commit is contained in:
Chris Rose 2021-05-26 09:06:47 -07:00 committed by Chris Rose
parent 1d5ee4dd7c
commit 640b2c0e13
2 changed files with 13 additions and 18 deletions
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1
AUTHORS
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@ -62,6 +62,7 @@ Charles Machalow
Charnjit SiNGH (CCSJ) Charnjit SiNGH (CCSJ)
Chris Lamb Chris Lamb
Chris NeJame Chris NeJame
Chris Rose
Christian Boelsen Christian Boelsen
Christian Fetzer Christian Fetzer
Christian Neumüller Christian Neumüller

30
doc/en/getting-started.rst
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@ -169,40 +169,34 @@ This is outlined below:
# content of test_class_demo.py # content of test_class_demo.py
class TestClassDemoInstance: class TestClassDemoInstance:
value = 0
def test_one(self): def test_one(self):
assert 0 self.value = 1
assert self.value == 1
def test_two(self): def test_two(self):
assert 0 assert self.value == 1
.. code-block:: pytest .. code-block:: pytest
$ pytest -k TestClassDemoInstance -q $ pytest -k TestClassDemoInstance -q
FF [100%] .F [100%]
================================= FAILURES ================================= ================================= FAILURES =================================
______________________ TestClassDemoInstance.test_one ______________________
self = <test_class_demo.TestClassDemoInstance object at 0xdeadbeef>
def test_one(self):
> assert 0
E assert 0
test_class_demo.py:3: AssertionError
______________________ TestClassDemoInstance.test_two ______________________ ______________________ TestClassDemoInstance.test_two ______________________
self = <test_class_demo.TestClassDemoInstance object at 0xdeadbeef> self = <test_class_demo.TestClassDemoInstance object at 0xdeadbeef>
def test_two(self): def test_two(self):
> assert 0 > assert self.value == 1
E assert 0 E assert 0 == 1
E + where 0 = <test_class_demo.TestClassDemoInstance object at 0xdeadbeef>.value
test_class_demo.py:6: AssertionError test_class_demo.py:9: AssertionError
========================= short test summary info ========================== ========================= short test summary info ==========================
FAILED test_class_demo.py::TestClassDemoInstance::test_one - assert 0 FAILED test_class_demo.py::TestClassDemoInstance::test_two - assert 0 == 1
FAILED test_class_demo.py::TestClassDemoInstance::test_two - assert 0 1 failed, 1 passed in 0.04s
2 failed in 0.12s
Note that attributes added at class level are *class attributes*, so they will be shared between tests. Note that attributes added at class level are *class attributes*, so they will be shared between tests.