Cleanup/improve coverage, mainly with tests

[blueyed]

No description provided.

[codecov-io]

Codecov Report

Merging #706 into master will increase coverage by 1.53%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #706      +/-   ##
==========================================
+ Coverage   96.49%   98.03%   +1.53%     
==========================================
  Files          32       32              
  Lines        1854     1831      -23     
  Branches      154      142      -12     
==========================================
+ Hits         1789     1795       +6     
+ Misses         39       23      -16     
+ Partials       26       13      -13

Flag	Coverage Δ
#dj110	85.58% <24.39%> (+1.06%)	⬆️
#dj111	87.87% <24.39%> (+1.09%)	⬆️
#dj18	86.56% <24.39%> (+1.07%)	⬆️
#dj19	85.63% <80.48%> (+1.38%)	⬆️
#dj20	87.82% <24.39%> (+1.08%)	⬆️
#dj21	85.3% <14.63%> (+0.89%)	⬆️
#dj22	83.17% <14.63%> (+0.87%)	⬆️
#djmaster	81.15% <14.63%> (+1%)	⬆️
#mysql_innodb	86.07% <24.39%> (+1.06%)	⬆️
#mysql_myisam	85.9% <24.39%> (+1.06%)	⬆️
#postgres	91.09% <24.39%> (+1.13%)	⬆️
#py27	90.93% <34.14%> (+1.12%)	⬆️
#py34	85.63% <80.48%> (+1.38%)	⬆️
#py35	85.58% <24.39%> (+1.06%)	⬆️
#py36	88.74% <24.39%> (+1.1%)	⬆️
#py37	85.69% <14.63%> (+0.9%)	⬆️
#pytest41	85.03% <14.63%> (+0.89%)	⬆️
#sqlite	90.33% <80.48%> (+1.44%)	⬆️
#sqlite_file	85.63% <80.48%> (+1.38%)	⬆️
#xdist	87.82% <24.39%> (+1.08%)	⬆️

Impacted Files	Coverage Δ
tests/test_fixtures.py	99.6% <ø> (ø)	⬆️
pytest_django_test/app/models.py	100% <ø> (+28.57%)	⬆️
tests/test_django_configurations.py	100% <ø> (+7.31%)	⬆️
pytest_django_test/db_helpers.py	100% <100%> (+18.51%)	⬆️
pytest_django_test/app/views.py	100% <100%> (+20%)	⬆️
pytest_django_test/settings_base.py	100% <100%> (+14.28%)	⬆️

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