1 files changed, 46 insertions, 0 deletions
diff --git a/tests/functional/c/consider/consider_using_in.py b/tests/functional/c/consider/consider_using_in.py
new file mode 100644
index 000000000..fb68ac5e6
--- /dev/null
+++ b/tests/functional/c/consider/consider_using_in.py
@@ -0,0 +1,46 @@
+# pylint: disable=missing-docstring, invalid-name, pointless-statement, misplaced-comparison-constant, undefined-variable, literal-comparison, line-too-long, unneeded-not
+
+value = value1 = 1
+value2 = 2
+a_set = {1, 2, 3}
+a_list = [1, 2, 3]
+a_str = '1'
+
+# Positive
+value == 1 or value == 1  # [consider-using-in]
+value == 1 or value == 2  # [consider-using-in]
+'value' == value or 'value' == value  # [consider-using-in]
+value == 1 or value == undef_value  # [consider-using-in]
+value == 1 or value == 2 or value == 3  # [consider-using-in]
+value == '2' or value == 1  # [consider-using-in]
+1 == value or 2 == value  # [consider-using-in]
+1 == value or value == 2  # [consider-using-in]
+value == 1 or value == a_list  # [consider-using-in]
+value == a_set or value == a_list or value == a_str  # [consider-using-in]
+value != 1 and value != 2  # [consider-using-in]
+value1 == value2 or value2 == value1  # [consider-using-in]
+a_list == [1, 2, 3] or a_list == []  # [consider-using-in]
+
+# Negative
+value != 1 or value != 2  # not a "not in"-case because of "or"
+value == 1 and value == 2  # not a "in"-case because of "and"
+value == 1 and value == 2 or value == 3  # not only 'or's
+value == 1 or value == 2 or 3 < value < 4  # not only '=='
+value == 1  # value not checked against multiple values
+value == 1 or value == 2 or value == 3 and value == 4  # not all checks are concatenated with 'or'
+value == 1 or 2 < value < 3  # length of 'ops' != 1 for second check
+value is 1 or value is 2  # 'in' compares using '==' not 'is' and therefore not considered
+not value == 1 and not value == 2
+value1 == 1 or value2 == 2  # different variables and only one comparison for each
+value1 == value2 == 1 or value1 == 2  # not checking multi-compares for '=='
+value1 != 1 == value2 and value2 != value1 != 2  # not checking multi-compares for '!='
+value1 == 1 or value1 == value2 or value2 == 3  # value1 or value2 do not occur in every check
+value1 == 1 or value1 == 2 or value2 == 1 or value2 == 2  # value1 or value2 do not occur in every check
+'value' == 1 or 'value' == 2  # only detect variables for now
+
+
+def oops():
+    return 5 / 0
+
+
+some_value = value == 4 or value == 5 or value == oops() # We only look for names and constants