Conditional parametrize in PyTest - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is parametrize in pytest?

Parametrize allows you to run the same test function with different input values, making tests efficient and organized.

intermediate

How can you conditionally parametrize tests in pytest?

You can use Python code or fixtures to decide which parameters to pass, so tests run only with relevant data.

intermediate

Example of using @pytest.mark.parametrize with a condition inside the test function.

You parametrize all data but skip or assert only for certain conditions inside the test using if statements.

beginner

Why use conditional parametrize instead of multiple test functions?

It keeps tests DRY (Don't Repeat Yourself), easier to maintain, and runs only needed cases based on conditions.

intermediate

What is a simple way to skip certain parameter sets in pytest based on a condition?

Use pytest.param with marks=pytest.mark.skipif(condition, reason='...') inside @pytest.mark.parametrize.

What does @pytest.mark.parametrize do?

A Generates test reports

B Skips a test unconditionally

C Runs tests in parallel

D Runs a test multiple times with different inputs

Parametrize runs the same test function with different sets of input values.

How can you skip a parameter set conditionally in pytest?

A Use <code>pytest.param(..., marks=pytest.mark.skipif(condition))</code>

B Use <code>pytest.skip()</code> inside the test

C Use <code>assert False</code> in the test

D Remove the parameter from the list

Using pytest.param with skipif mark skips that parameter set based on the condition.

Why is conditional parametrize useful?

A To run tests only with relevant inputs based on conditions

B To avoid writing tests

C To make tests slower

D To run all tests regardless of input

Conditional parametrize helps run tests only for inputs that matter in the current context.

Which Python feature helps decide parameters dynamically in pytest?

A List comprehension

B Global variables only

C If statements and functions

D No Python code can be used

You can use if statements and functions to build parameter lists conditionally.

What happens if a test is skipped using skipif in parametrize?

A Test fails

B Test is ignored and marked skipped

C Test runs normally

D Test crashes

Tests marked with skipif are ignored and shown as skipped in reports.

Explain how to use conditional parametrize in pytest with an example.

Think about skipping some inputs based on a condition.

Why is conditional parametrize better than writing multiple test functions for different inputs?

Consider the DRY principle.