[Solved] What will be the outcome of this pytest assertion?str1 = 'hello' str2 = ''.join(['h', 'e', 'l', 'l', 'o']) assert str1 is str2 | PyTest

PyTest - Writing Assertions

What will be the outcome of this pytest assertion?

str1 = 'hello'
str2 = ''.join(['h', 'e', 'l', 'l', 'o'])
assert str1 is str2

AThe assertion will pass because both strings have the same content

BThe assertion will fail because str1 and str2 are different objects

CThe assertion will fail because str2 is None

DThe assertion will pass because Python interns all strings automatically

Step-by-Step Solution

Solution:

Step 1: Understand string interning
Python may intern some strings, but dynamically created strings like str2 are usually new objects.
Step 2: Check identity vs equality
is checks object identity, not content equality.
Step 3: Analyze the assertion
str1 and str2 have same content but are different objects, so assert str1 is str2 fails.
Final Answer:
The assertion will fail because str1 and str2 are different objects -> Option B
Quick Check:
Same content ≠ same object [OK]

Quick Trick: Use 'is' for identity, not string content equality [OK]

Common Mistakes:

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