Issue #15 (#23)

* Test: Created new tests for issue 3. Issue #15

* Test: Modified WPS235 in test_noqa.py. Issue #15

Co-authored-by: iZafiro <60047972+iZafiro@users.noreply.github.com>

tests/test_checker/test_noqa.py

@@ -104,7 +104,7 @@
     'WPS232': 0,  # logically unacceptable.
     'WPS233': 1,
     'WPS234': 1,
-    'WPS235': 3,  # Gwin73 and iZafiro
+    'WPS235': 1,
 
     'WPS300': 1,
     'WPS301': 1,

tests/test_visitors/test_ast/test_complexity/test_function/test_raises.py

@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+
+import pytest
+
+from wemake_python_styleguide.visitors.ast.complexity.function import (
+    FunctionComplexityVisitor,
+    TooManyRaisesViolation,
+)
+
+function_without_raises = 'def function(): ...'
+
+function_with_raises = """
+def function():
+    if 1 > 2:
+        raise error1
+    raise error2
+"""
+
+function_with_nested_function_and_raises = """
+def function():  # has two raises
+    def factory():  # has one raise
+        raise error3
+    raise error4
+"""
+
+
+@pytest.mark.parametrize('code', [
+    function_without_raises,
+    function_with_raises,
+    function_with_nested_function_and_raises,
+])
+def test_raises_correct_count(
+    assert_errors,
+    parse_ast_tree,
+    code,
+    default_options,
+    mode,
+):
+    """Testing that raises counted correctly."""
+    tree = parse_ast_tree(mode(code))
+
+    visitor = FunctionComplexityVisitor(default_options, tree=tree)
+    visitor.run()
+
+    assert_errors(visitor, [])
+
+
+@pytest.mark.parametrize('code', [
+    function_with_raises,
+    function_with_nested_function_and_raises,
+])
+def test_raises_wrong_count(
+    assert_errors,
+    assert_error_text,
+    parse_ast_tree,
+    options,
+    code,
+    mode,
+):
+    """Testing that many raises raises a warning."""
+    tree = parse_ast_tree(mode(code))
+
+    option_values = options(max_raises=1)
+    visitor = FunctionComplexityVisitor(option_values, tree=tree)
+    visitor.run()
+
+    assert_errors(visitor, [TooManyRaisesViolation])
+    assert_error_text(visitor, '2', option_values.max_raises)