Tests: get rid of classes in test files.

Class usage came from the unittest framework and it was always redundant
after migration to the pytest.  This commit removes classes from files
containing tests to make them more readable and understandable.

test/test_njs.py

@@ -1,92 +1,101 @@
 import os
 
 import pytest
-from unit.applications.proto import TestApplicationProto
+from unit.applications.proto import ApplicationProto
 from unit.option import option
 from unit.utils import waitforfiles
 
 prerequisites = {'modules': {'njs': 'any'}}
 
+client = ApplicationProto()
 
-class TestNJS(TestApplicationProto):
-    @pytest.fixture(autouse=True)
-    def setup_method_fixture(self, temp_dir):
-        assert 'success' in self.conf(
-            {
-                "listeners": {"*:7080": {"pass": "routes"}},
-                "routes": [{"action": {"share": f"{temp_dir}/assets$uri"}}],
-            }
-        )
 
-    def create_files(self, *files):
-        assets_dir = f'{option.temp_dir}/assets/'
-        os.makedirs(assets_dir)
+@pytest.fixture(autouse=True)
+def setup_method_fixture(temp_dir):
+    assert 'success' in client.conf(
+        {
+            "listeners": {"*:7080": {"pass": "routes"}},
+            "routes": [{"action": {"share": f"{temp_dir}/assets$uri"}}],
+        }
+    )
 
-        [open(assets_dir + f, 'a') for f in files]
-        waitforfiles(*[assets_dir + f for f in files])
 
-    def set_share(self, share):
-        assert 'success' in self.conf(share, 'routes/0/action/share')
+def create_files(*files):
+    assets_dir = f'{option.temp_dir}/assets/'
+    os.makedirs(assets_dir)
 
-    def check_expression(self, expression, url='/'):
-        self.set_share(f'"`{option.temp_dir}/assets{expression}`"')
-        assert self.get(url=url)['status'] == 200
+    [open(assets_dir + f, 'a') for f in files]
+    waitforfiles(*[assets_dir + f for f in files])
 
-    def test_njs_template_string(self, temp_dir):
-        self.create_files('str', '`string`', '`backtick', 'l1\nl2')
 
-        self.check_expression('/str')
-        self.check_expression('/\\\\`backtick')
-        self.check_expression('/l1\\nl2')
+def set_share(share):
+    assert 'success' in client.conf(share, 'routes/0/action/share')
 
-        self.set_share(f'"{temp_dir}/assets/`string`"')
-        assert self.get()['status'] == 200
 
-    def test_njs_template_expression(self):
-        self.create_files('str', 'localhost')
+def check_expression(expression, url='/'):
+    set_share(f'"`{option.temp_dir}/assets{expression}`"')
+    assert client.get(url=url)['status'] == 200
 
-        self.check_expression('${uri}', '/str')
-        self.check_expression('${uri}${host}')
-        self.check_expression('${uri + host}')
-        self.check_expression('${uri + `${host}`}')
 
-    def test_njs_iteration(self):
-        self.create_files('Connection,Host', 'close,localhost')
+def test_njs_template_string(temp_dir):
+    create_files('str', '`string`', '`backtick', 'l1\nl2')
 
-        self.check_expression('/${Object.keys(headers).sort().join()}')
-        self.check_expression('/${Object.values(headers).sort().join()}')
+    check_expression('/str')
+    check_expression('/\\\\`backtick')
+    check_expression('/l1\\nl2')
 
-    def test_njs_variables(self, temp_dir):
-        self.create_files('str', 'localhost', '127.0.0.1')
+    set_share(f'"{temp_dir}/assets/`string`"')
+    assert client.get()['status'] == 200
 
-        self.check_expression('/${host}')
-        self.check_expression('/${remoteAddr}')
-        self.check_expression('/${headers.Host}')
 
-        self.set_share(f'"`{temp_dir}/assets/${{cookies.foo}}`"')
-        assert (
-            self.get(headers={'Cookie': 'foo=str', 'Connection': 'close'})[
-                'status'
-            ]
-            == 200
-        ), 'cookies'
+def test_njs_template_expression():
+    create_files('str', 'localhost')
 
-        self.set_share(f'"`{temp_dir}/assets/${{args.foo}}`"')
-        assert self.get(url='/?foo=str')['status'] == 200, 'args'
+    check_expression('${uri}', '/str')
+    check_expression('${uri}${host}')
+    check_expression('${uri + host}')
+    check_expression('${uri + `${host}`}')
 
-    def test_njs_invalid(self, skip_alert):
-        skip_alert(r'js exception:')
 
-        def check_invalid(template):
-            assert 'error' in self.conf(template, 'routes/0/action/share')
+def test_njs_iteration():
+    create_files('Connection,Host', 'close,localhost')
 
-        check_invalid('"`a"')
-        check_invalid('"`a``"')
-        check_invalid('"`a`/"')
+    check_expression('/${Object.keys(headers).sort().join()}')
+    check_expression('/${Object.values(headers).sort().join()}')
 
-        def check_invalid_resolve(template):
-            assert 'success' in self.conf(template, 'routes/0/action/share')
-            assert self.get()['status'] == 500
 
-        check_invalid_resolve('"`${a}`"')
-        check_invalid_resolve('"`${uri.a.a}`"')
+def test_njs_variables(temp_dir):
+    create_files('str', 'localhost', '127.0.0.1')
+
+    check_expression('/${host}')
+    check_expression('/${remoteAddr}')
+    check_expression('/${headers.Host}')
+
+    set_share(f'"`{temp_dir}/assets/${{cookies.foo}}`"')
+    assert (
+        client.get(headers={'Cookie': 'foo=str', 'Connection': 'close'})[
+            'status'
+        ]
+        == 200
+    ), 'cookies'
+
+    set_share(f'"`{temp_dir}/assets/${{args.foo}}`"')
+    assert client.get(url='/?foo=str')['status'] == 200, 'args'
+
+
+def test_njs_invalid(skip_alert):
+    skip_alert(r'js exception:')
+
+    def check_invalid(template):
+        assert 'error' in client.conf(template, 'routes/0/action/share')
+
+    check_invalid('"`a"')
+    check_invalid('"`a``"')
+    check_invalid('"`a`/"')
+
+    def check_invalid_resolve(template):
+        assert 'success' in client.conf(template, 'routes/0/action/share')
+        assert client.get()['status'] == 500
+
+    check_invalid_resolve('"`${a}`"')
+    check_invalid_resolve('"`${uri.a.a}`"')