Drop custom test runner, include tox in dev-requirements.txt

Author: eemeli

.github/workflows/fluent.integration.yml

@@ -41,5 +41,5 @@ jobs:
       - name: Install latest fluent.syntax
         working-directory: ./fluent.syntax
         run: python -m pip install .
-      - run: ./runtests.py
+      - run: python -m unittest
         working-directory: ./fluent.runtime

.github/workflows/fluent.runtime.yml

@@ -41,5 +41,5 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install fluent.syntax==${{ matrix.fluent-syntax }} six
           python -m pip install .
-      - run: ./runtests.py
+      - run: python -m unittest
         working-directory: ./fluent.runtime

.github/workflows/fluent.syntax.yml

@@ -36,5 +36,5 @@ jobs:
           python -m pip install wheel
           python -m pip install --upgrade pip
           python -m pip install .
-      - run: ./runtests.py
+      - run: python -m unittest
         working-directory: ./fluent.syntax

dev-requirements.txt

@@ -1,5 +1,6 @@
 flake8 ~= 7.0
 isort ~= 5.0
 mypy ~= 1.0
+tox ~= 4.0
 types-babel
 types-pytz

fluent.runtime/runtests.py

@@ -12,9 +12,9 @@ deps =
      attrs==19.1.0
      babel==2.7.0
      pytz==2019.2
-     typing-extensions==3.7
+     typing-extensions~=3.7
      syntax: .
-commands = ./runtests.py
+commands = python -m unittest
 
 [testenv:latest]
 basepython = python3

fluent.runtime/tox.ini

@@ -8,5 +8,5 @@ skipsdist=True
 setenv =
     PYTHONPATH = {toxinidir}
 deps =
-     typing-extensions==3.7
-commands = ./runtests.py
+     typing-extensions~=3.7
+commands = python -m unittest