1 files changed, 37 insertions, 0 deletions
diff --git a/tests/functional/c/consider_merging_isinstance.py b/tests/functional/c/consider_merging_isinstance.py
new file mode 100644
index 000000000..34068d9b7
--- /dev/null
+++ b/tests/functional/c/consider_merging_isinstance.py
@@ -0,0 +1,37 @@
+"""Checks use of consider-merging-isinstance"""
+# pylint:disable=line-too-long
+
+
+def isinstances():
+    "Examples of isinstances"
+    var = range(10)
+
+    # merged
+    if isinstance(var[1], (int, float)):
+        pass
+    result = isinstance(var[2], (int, float))
+
+    # not merged
+    if isinstance(var[3], int) or isinstance(var[3], float) or isinstance(var[3], list) and True:  # [consider-merging-isinstance]
+        pass
+    result = isinstance(var[4], int) or isinstance(var[4], float) or isinstance(var[5], list) and False  # [consider-merging-isinstance]
+
+    result = isinstance(var[5], int) or True or isinstance(var[5], float)  # [consider-merging-isinstance]
+
+    infered_isinstance = isinstance
+    result = infered_isinstance(var[6], int) or infered_isinstance(var[6], float) or infered_isinstance(var[6], list) and False   # [consider-merging-isinstance]
+    result = isinstance(var[10], str) or isinstance(var[10], int) and var[8] * 14 or isinstance(var[10], float) and var[5] * 14.4 or isinstance(var[10], list)   # [consider-merging-isinstance]
+    result = isinstance(var[11], int) or isinstance(var[11], int) or isinstance(var[11], float)   # [consider-merging-isinstance]
+
+    result = isinstance(var[20])
+    result = isinstance()
+
+    # Combination merged and not merged
+    result = isinstance(var[12], (int, float)) or isinstance(var[12], list)  # [consider-merging-isinstance]
+
+    # not merged but valid
+    result = isinstance(var[5], int) and var[5] * 14 or isinstance(var[5], float) and var[5] * 14.4
+    result = isinstance(var[7], int) or not isinstance(var[7], float)
+    result = isinstance(var[6], int) or isinstance(var[7], float)
+    result = isinstance(var[6], int) or isinstance(var[7], int)
+    return result