Use tox for testing, add coverage testing

.coveragerc

@@ -0,0 +1,32 @@
+[run]
+# measure 'branch' coverage in addition to 'statement' coverage
+# See: http://coverage.readthedocs.org/en/coverage-4.0.3/branch.html#branch
+branch = True
+parallel = True
+omit = tests/*
+
+# list of directories or packages to measure
+source = fontmake
+
+# these are treated as equivalent when combining data
+[paths]
+source =
+    Lib/fontmake
+    */site-packages/fontmake
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # keywords to use in inline comments to skip coverage
+    pragma: no cover
+
+    # don't complain if tests don't hit defensive assertion code
+    raise AssertionError
+    raise NotImplementedError
+
+    # don't complain if non-runnable code isn't run
+    if 0:
+    if __name__ == .__main__.:
+
+# ignore source code that can’t be found
+ignore_errors = True

.gitattributes

@@ -5,6 +5,7 @@
 # to native line endings on checkout.
 *.cfg text
 *.in text
+*.ini text
 *.md text
 *.py text
 *.rst text

.travis.yml

@@ -1,31 +1,35 @@
-sudo: false
-language: python
+dist: xenial
+
 env:
   global:
     - TWINE_USERNAME="anthrotype"
     - secure: 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
 
-python:
-  - "2.7"
-  - "3.6"
-
 cache:
   directories:
     - $HOME/.cache/pip
     - $HOME/.cache/pre-commit
 
+language: python
+
+matrix:
+  include:
+    - python: 3.7
+      env: TOXENV=lint
+    - python: 3.6
+      env: TOXENV=py36-cov
+    - python: 3.7
+      env: TOXENV=py37-cov
+
 install:
-  - pip install --upgrade pip
-  - pip install -r test_requirements.txt .
+  - pip install tox
 
 script:
-  - |
-    if [ "$TRAVIS_PYTHON_VERSION" == "3.6" ]; then pip install --upgrade pre-commit && pre-commit run --all-files --show-diff-on-failure; fi
-  - (cd test && ./run.sh)
+  - tox
 
 after_success:
   - |
-    if [ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_REPO_SLUG" == "googlefonts/fontmake" ] && [ "$TRAVIS_PYTHON_VERSION" == "3.6" ]; then
+    if [ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_REPO_SLUG" == "googlefonts/fontmake" ] && [ "$TOXENV" == "py37-cov" ]; then
       pip install --upgrade pip
       pip install --upgrade twine setuptools wheel shiv
       python setup.py sdist
@@ -46,4 +50,4 @@ deploy:
       repo: googlefonts/fontmake
       tags: true
       all_branches: true
-      python: 3.6
+      python: 3.7

setup.cfg

@@ -13,3 +13,8 @@ ignore = E203, E266, E501, W503
 max-line-length = 80
 max-complexity = 21
 exclude = .git, __pycache__, build, dist, .eggs, .tox
+
+[tool:pytest]
+filterwarnings =
+    ignore:fromstring:DeprecationWarning
+    ignore:tostring:DeprecationWarning

test_requirements.txt

@@ -1,2 +1,3 @@
 -r requirements.txt
-mock==2.0.0; python_version < "3.3"
+pytest>=4.5.0
+pytest-cov>=2.7

tox.ini

@@ -0,0 +1,24 @@
+# More info on pytest-cov integration: https://pytest-cov.readthedocs.io/en/latest/tox.html
+# Coverage is intentionally not appended to each run because we do not have a coverage
+# service set up, it should be used by the developer for local runs only.
+
+[tox]
+envlist = lint, py{36,37}-cov, coverage-report
+
+[testenv]
+deps =
+    -r test_requirements.txt
+commands =
+    pytest --cov fontmake {posargs}
+
+[testenv:lint]
+skip_install = true
+deps = pre-commit
+commands =
+    pre-commit run --all-files --show-diff-on-failure
+    python -c 'print(r"hint: run {envdir}/bin/pre-commit or {envdir}/Scripts/pre-commit install to add checks as pre-commit hook")'
+
+[testenv:coverage-report]
+skip_install = true
+commands =
+    coverage html