switch to functional tests

tests/functional/ext/function_return_not_assigned/function_return_not_assigned.py

@@ -0,0 +1,56 @@
+# pylint: disable=missing-function-docstring, missing-module-docstring, missing-class-docstring, expression-not-assigned, invalid-name
+from dataclasses import dataclass, replace
+
+
+def func_that_returns_something():
+    return 1
+
+
+func_that_returns_something()  # [function-return-not-assigned]
+
+_ = func_that_returns_something()
+
+if func_that_returns_something():
+    pass
+
+
+def func_that_returns_none():
+    return None
+
+
+def func_with_no_explicit_return():
+    print("I am doing something")
+
+
+func_that_returns_none()
+func_with_no_explicit_return()
+
+some_var = ""
+# next line should probably raise?
+func_that_returns_something() if some_var else func_that_returns_none()
+_ = func_that_returns_something() if some_var else func_that_returns_none()
+func_with_no_explicit_return() if some_var else func_that_returns_none()
+
+
+@dataclass
+class TestClass:
+    value: int
+
+    def return_self(self):
+        return self
+
+    def return_none(self):
+        pass
+
+
+inst = TestClass(1)
+inst.return_self()  # [function-return-not-assigned]
+inst.return_none()
+
+replace(inst, value=3)  # [function-return-not-assigned]
+
+inst = replace(inst, value=3)
+
+inst.return_self()  # [function-return-not-assigned]
+inst.return_none()
+inst = inst.return_self()

tests/functional/ext/function_return_not_assigned/function_return_not_assigned.rc

@@ -0,0 +1,2 @@
+[MAIN]
+load-plugins=pylint.extensions.function_return_not_assigned,

tests/functional/ext/function_return_not_assigned/function_return_not_assigned.txt

@@ -0,0 +1,4 @@
+function-return-not-assigned:9:0:9:29::Function returned value which is never used:UNDEFINED
+function-return-not-assigned:47:0:47:18::Function returned value which is never used:UNDEFINED
+function-return-not-assigned:50:0:50:22::Function returned value which is never used:UNDEFINED
+function-return-not-assigned:54:0:54:18::Function returned value which is never used:UNDEFINED