Change example configs to support tox -e pyXX

Author: gschaffner

examples/adhoc-layout/tox.ini

@@ -1,12 +1,14 @@
 [tox]
-envlist = clean,py27,py38,report
+envlist = py27,py38,report
 
 [tool:pytest]
 addopts =
     --cov-report=term-missing
 
 [testenv]
-commands = pytest --cov --cov-append --cov-config={toxinidir}/.coveragerc {posargs:-vv}
+setenv =
+    py{27,38}: COVERAGE_FILE = .coverage.{envname}
+commands = pytest --cov --cov-config={toxinidir}/.coveragerc {posargs:-vv}
 deps =
     pytest
     coverage
@@ -17,7 +19,6 @@ deps =
     ../..
 
 depends =
-    {py27,py38}: clean
     report: py27,py38
 
 # note that this is necessary to prevent the tests importing the code from your badly laid project
@@ -27,10 +28,6 @@ changedir = tests
 skip_install = true
 deps = coverage
 commands =
+    coverage combine
     coverage html
     coverage report --fail-under=100
-
-[testenv:clean]
-skip_install = true
-deps = coverage
-commands = coverage erase

examples/src-layout/tox.ini

@@ -1,13 +1,15 @@
 [tox]
-envlist = clean,py27,py38,report
+envlist = py27,py38,report
 
 [tool:pytest]
 testpaths = tests
 addopts =
     --cov-report=term-missing
 
 [testenv]
-commands = pytest --cov --cov-append {posargs:-vv}
+setenv =
+    py{27,38}: COVERAGE_FILE = .coverage.{envname}
+commands = pytest --cov {posargs:-vv}
 deps =
     pytest
     coverage
@@ -18,17 +20,12 @@ deps =
     ../..
 
 depends =
-    {py27,py38}: clean
     report: py27,py38
 
 [testenv:report]
 skip_install = true
 deps = coverage
 commands =
+    coverage combine
     coverage html
     coverage report --fail-under=100
-
-[testenv:clean]
-skip_install = true
-deps = coverage
-commands = coverage erase