Tox env with no dependencies

.github/workflows/main.yml

@@ -4,7 +4,7 @@ on: [push]
 
 jobs:
   checks:
-    name: Lint, typing, coverage
+    name: Flake8, typing, black
     runs-on: ubuntu-latest
 
     steps:
@@ -27,12 +27,6 @@ jobs:
     - name: Black
       run: tox -e black
 
-    - name: Generate coverage report
-      run: tox -e py
-
-    - name: Upload coverage report
-      run: bash <(curl -s https://codecov.io/bash)
-
 
   tests-ubuntu:
     name: "Test: py${{ matrix.python-version }}, Ubuntu"
@@ -55,6 +49,32 @@ jobs:
     - name: Run tests
       run: tox -e py
 
+    - name: Upload coverage report
+      run: bash <(curl -s https://codecov.io/bash) -cF tests
+
+
+  tests-no-deps:
+    name: "Test: python3.6, Ubuntu, no deps"
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python 3.6
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.6
+
+    - name: Install tox
+      run: pip install tox
+
+    - name: Run tests
+      run: tox -e no-deps
+
+    - name: Upload coverage report
+      run: bash <(curl -s https://codecov.io/bash) -cF tests
+
+
   tests-other-os:
     name: "Test: py3.8, ${{ matrix.os }}"
     runs-on: "${{ matrix.os }}"

tests/test_utils.py

@@ -6,10 +6,6 @@
 from tests import AttrsItem, DataClassItem, ScrapyItem, ScrapySubclassedItem
 
 
-def mocked_import(name, *args, **kwargs):
-    raise ImportError(name)
-
-
 class ItemLikeTestCase(unittest.TestCase):
     def test_false(self):
         self.assertFalse(is_item(int))
@@ -50,8 +46,6 @@ def test_false(self):
         self.assertFalse(is_attrs_instance(sum))
         self.assertFalse(is_attrs_instance(1234))
         self.assertFalse(is_attrs_instance(object()))
-        self.assertFalse(is_attrs_instance(ScrapyItem()))
-        self.assertFalse(is_attrs_instance(ScrapySubclassedItem()))
         self.assertFalse(is_attrs_instance("a string"))
         self.assertFalse(is_attrs_instance(b"some bytes"))
         self.assertFalse(is_attrs_instance({"a": "dict"}))
@@ -60,11 +54,6 @@ def test_false(self):
         self.assertFalse(is_attrs_instance({"a", "set"}))
         self.assertFalse(is_attrs_instance(AttrsItem))
 
-    @unittest.skipIf(not AttrsItem, "attrs module is not available")
-    @mock.patch("builtins.__import__", mocked_import)
-    def test_module_not_available(self):
-        self.assertFalse(is_attrs_instance(AttrsItem(name="asdf", value=1234)))
-
     @unittest.skipIf(not AttrsItem, "attrs module is not available")
     def test_true(self):
         self.assertTrue(is_attrs_instance(AttrsItem()))
@@ -77,9 +66,6 @@ def test_false(self):
         self.assertFalse(is_dataclass_instance(sum))
         self.assertFalse(is_dataclass_instance(1234))
         self.assertFalse(is_dataclass_instance(object()))
-        self.assertFalse(is_dataclass_instance(ScrapyItem()))
-        self.assertFalse(is_dataclass_instance(AttrsItem()))
-        self.assertFalse(is_dataclass_instance(ScrapySubclassedItem()))
         self.assertFalse(is_dataclass_instance("a string"))
         self.assertFalse(is_dataclass_instance(b"some bytes"))
         self.assertFalse(is_dataclass_instance({"a": "dict"}))
@@ -88,11 +74,6 @@ def test_false(self):
         self.assertFalse(is_dataclass_instance({"a", "set"}))
         self.assertFalse(is_dataclass_instance(DataClassItem))
 
-    @unittest.skipIf(not DataClassItem, "dataclasses module is not available")
-    @mock.patch("builtins.__import__", mocked_import)
-    def test_module_not_available(self):
-        self.assertFalse(is_dataclass_instance(DataClassItem(name="asdf", value=1234)))
-
     @unittest.skipIf(not DataClassItem, "dataclasses module is not available")
     def test_true(self):
         self.assertTrue(is_dataclass_instance(DataClassItem()))
@@ -105,7 +86,6 @@ def test_false(self):
         self.assertFalse(is_scrapy_item(sum))
         self.assertFalse(is_scrapy_item(1234))
         self.assertFalse(is_scrapy_item(object()))
-        self.assertFalse(is_scrapy_item(AttrsItem()))
         self.assertFalse(is_scrapy_item("a string"))
         self.assertFalse(is_scrapy_item(b"some bytes"))
         self.assertFalse(is_scrapy_item({"a": "dict"}))
@@ -114,11 +94,6 @@ def test_false(self):
         self.assertFalse(is_scrapy_item({"a", "set"}))
         self.assertFalse(is_scrapy_item(ScrapySubclassedItem))
 
-    @unittest.skipIf(not ScrapySubclassedItem, "scrapy module is not available")
-    @mock.patch("builtins.__import__", mocked_import)
-    def test_module_not_available(self):
-        self.assertFalse(is_scrapy_item(ScrapySubclassedItem(name="asdf", value=1234)))
-
     @unittest.skipIf(not ScrapySubclassedItem, "scrapy module is not available")
     def test_true(self):
         self.assertTrue(is_scrapy_item(ScrapyItem()))

tox.ini

@@ -1,23 +1,46 @@
 [tox]
-envlist = py35,py36,py37,py38,flake8,typing,black
+envlist = py35,py36,py37,py38,no-deps,flake8,typing,black
 
 [testenv]
 deps =
-    -rtests/requirements.txt
+    pytest>=5.4
+    pytest-cov>=2.8
 commands =
-    pytest --verbose --cov=itemadapter --cov-report=term-missing --cov-report=html --cov-report=xml {posargs: itemadapter tests}
+    pytest --verbose --cov=itemadapter --cov-report=term-missing --cov-report=html --cov-report=xml --cov-append {posargs: itemadapter tests}
 
 [testenv:py35]
 basepython = python3.5
+deps =
+    {[testenv]deps}
+    attrs
+    scrapy>=2.0
 
 [testenv:py36]
 basepython = python3.6
+deps =
+    {[testenv]deps}
+    attrs
+    dataclasses
+    scrapy>=2.0
 
 [testenv:py37]
 basepython = python3.7
+deps =
+    {[testenv]deps}
+    attrs
+    scrapy>=2.0
 
 [testenv:py38]
 basepython = python3.8
+deps =
+    {[testenv]deps}
+    attrs
+    scrapy>=2.0
+
+[testenv:no-deps]
+deps =
+    {[testenv]deps}
+basepython = python3.6
 
 [testenv:flake8]
 basepython = python3.8