blog(mock-hell): add stub

Signed-off-by: Matej Focko <mfocko@redhat.com>

blog/2023-10-09-mock-hell.md

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+---
+title: Mocking hell
+description: How can mocking make your life a hell.
+date: 2023-10-09
+authors:
+  - key: mf
+    title: a.k.a. hater of languages with dynamic typing
+tags:
+  - 🏭
+  - red-hat
+  - python
+  - tests
+  - mocks
+---
+
+Mocking is a pretty standard technique used in tests, is the benefit bigger than
+the negatives though?
+
+<!--truncate-->
+
+## Positives of mocking
+
+## Negatives of mocking
+
+### Mocking functions that need network access
+
+### Mocking in dynamically typed language
+
+### Scope
+
+### Small changes in the code
+
+## Summary