1 files changed, 101 insertions, 0 deletions
diff --git a/tests/functional/l/len_checks.py b/tests/functional/l/len_checks.py
new file mode 100644
index 000000000..e8e61afad
--- /dev/null
+++ b/tests/functional/l/len_checks.py
@@ -0,0 +1,101 @@
+# pylint: disable=too-few-public-methods,import-error, no-absolute-import,missing-docstring, misplaced-comparison-constant
+# pylint: disable=useless-super-delegation,wrong-import-position,invalid-name, wrong-import-order
+
+if len('TEST'):  # [len-as-condition]
+    pass
+
+if not len('TEST'):  # [len-as-condition]
+    pass
+
+z = False
+if z and len(['T', 'E', 'S', 'T']):  # [len-as-condition]
+    pass
+
+if True or len('TEST'):  # [len-as-condition]
+    pass
+
+if len('TEST') == 0:  # Should be fine
+    pass
+
+if len('TEST') < 1:  # Should be fine
+    pass
+
+if len('TEST') <= 0:  # Should be fine
+    pass
+
+if 1 > len('TEST'):  # Should be fine
+    pass
+
+if 0 >= len('TEST'):  # Should be fine
+    pass
+
+if z and len('TEST') == 0:  # Should be fine
+    pass
+
+if 0 == len('TEST') < 10:  # Should be fine
+    pass
+
+if 0 < 1 <= len('TEST') < 10:  # Should be fine
+    pass
+
+if 10 > len('TEST') != 0:  # Should be fine
+    pass
+
+if 10 > len('TEST') > 1 > 0:  # Should be fine
+    pass
+
+if 0 <= len('TEST') < 100:  # Should be fine
+    pass
+
+if z or 10 > len('TEST') != 0:  # Should be fine
+    pass
+
+if z:
+    pass
+elif len('TEST'):  # [len-as-condition]
+    pass
+
+if z:
+    pass
+elif not len('TEST'):  # [len-as-condition]
+    pass
+
+while len('TEST'):  # [len-as-condition]
+    pass
+
+while not len('TEST'):  # [len-as-condition]
+    pass
+
+while z and len('TEST'):  # [len-as-condition]
+    pass
+
+while not len('TEST') and z:  # [len-as-condition]
+    pass
+
+assert len('TEST') > 0  # Should be fine
+
+x = 1 if len('TEST') != 0 else 2  # Should be fine
+
+f_o_o = len('TEST') or 42  # Should be fine
+
+a = x and len(x)  # Should be fine
+
+def some_func():
+    return len('TEST') > 0  # Should be fine
+
+def github_issue_1325():
+    l = [1, 2, 3]
+    length = len(l) if l else 0  # Should be fine
+    return length
+
+def github_issue_1331(*args):
+    assert False, len(args)  # Should be fine
+
+def github_issue_1331_v2(*args):
+    assert len(args), args  # [len-as-condition]
+
+def github_issue_1331_v3(*args):
+    assert len(args) or z, args  # [len-as-condition]
+
+def github_issue_1331_v4(*args):
+    assert z and len(args), args  # [len-as-condition]