Coverage report formats (terminal, HTML, XML) in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to run pytest with coverage and show the report in the terminal.

PyTest

pytest --cov=my_package --cov-report=[1]

Drag options to blanks, or click blank then click option'

Ajson

Bhtml

Cxml

Dterm

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'html' or 'xml' instead of 'term' for terminal output.

Forgetting to add --cov-report option.

The term option shows the coverage report directly in the terminal after tests run.

2fill in blank

medium

Complete the code to generate an HTML coverage report in the 'coverage_html' folder.

PyTest

pytest --cov=my_package --cov-report=[1]:coverage_html

Drag options to blanks, or click blank then click option'

Axml

Bterm

Chtml

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'term' or 'xml' instead of 'html' for HTML report.

Not specifying the output folder after colon.

The html option generates a detailed HTML report in the specified folder.

3fill in blank

hard

Fix the error in the code to generate an XML coverage report named 'coverage.xml'.

PyTest

pytest --cov=my_package --cov-report=[1]:coverage.xml

Drag options to blanks, or click blank then click option'

Axml

Bterm

Chtml

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'html' or 'term' instead of 'xml' for XML report.

Not specifying the file name after colon.

The xml option generates an XML report file, commonly named coverage.xml.

4fill in blank

hard

Fill both blanks to generate terminal and HTML coverage reports simultaneously.

PyTest

pytest --cov=my_package --cov-report=[1] --cov-report=[2]:htmlcov

Drag options to blanks, or click blank then click option'

Aterm

Bhtml

Cxml

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same format twice.

Mixing up the order of reports.

Use term for terminal output and html for HTML report folder.

5fill in blank

hard

Fill all three blanks to generate terminal, HTML, and XML coverage reports.

PyTest

pytest --cov=my_package --cov-report=[1] --cov-report=[2]:htmlcov --cov-report=[3]:coverage.xml

Drag options to blanks, or click blank then click option'

Aterm

Bhtml

Cxml

Djson

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect format names.

Not specifying output paths for HTML and XML reports.

This command generates coverage reports in terminal, HTML folder, and XML file formats.

Practice

1. What is the main purpose of a coverage report in pytest?

easy

A. To generate test data automatically

B. To run tests faster by skipping some tests

C. To fix bugs in the code automatically

D. To show which parts of the code were tested and which were not

Solution

1. Step 1: Understand coverage report purpose

   Coverage reports show which lines or parts of code were executed during tests.

2. Step 2: Compare options with coverage purpose

   Only To show which parts of the code were tested and which were not correctly describes this purpose; others describe unrelated actions.

3. Final Answer:

   To show which parts of the code were tested and which were not -> Option D

4. Quick Check:

   Coverage report = tested code visibility [OK]

Hint: Coverage reports show tested vs untested code [OK]

Common Mistakes:

• Confusing coverage with test execution speed
• Thinking coverage generates test data
• Believing coverage fixes bugs automatically

2. Which pytest command option generates an HTML coverage report?

easy

A. --cov-report=xml

B. --cov-report=summary

C. --cov-report=html

D. --cov-report=term

Solution

1. Step 1: Recall pytest coverage report options

   Common options include 'term' for terminal, 'html' for HTML, and 'xml' for XML reports.

2. Step 2: Match option to HTML report

   Only '--cov-report=html' generates an HTML report.

3. Final Answer:

   --cov-report=html -> Option C

4. Quick Check:

   HTML report option = --cov-report=html [OK]

Hint: HTML report uses --cov-report=html option [OK]

Common Mistakes:

• Using --cov-report=xml for HTML report
• Confusing term with html option
• Using non-existent --cov-report=summary

3. Given this pytest command:
pytest --cov=myapp --cov-report=term-missing
What will the terminal output show?

medium

A. An HTML file opened in the browser

B. A summary of coverage with missing lines shown

C. An XML file saved to disk

D. No coverage information displayed

Solution

1. Step 1: Understand --cov-report=term-missing

   This option shows coverage summary in terminal and highlights missing lines.

2. Step 2: Match output to options

   A summary of coverage with missing lines shown matches terminal summary with missing lines; others describe HTML, XML, or no output.

3. Final Answer:

   A summary of coverage with missing lines shown -> Option B

4. Quick Check:

   term-missing = terminal summary with missing lines [OK]

Hint: term-missing shows missing lines in terminal [OK]

Common Mistakes:

• Thinking term-missing opens HTML report
• Expecting XML output from term-missing
• Assuming no coverage info is shown

4. You ran pytest --cov=myapp --cov-report=html but no HTML report was generated. What is the most likely cause?

medium

A. The HTML report is saved in the current directory as 'htmlcov'

B. You forgot to install the pytest-cov plugin

C. You need to add --cov-report=xml to generate HTML

D. HTML reports are not supported by pytest

Solution

1. Step 1: Check where HTML report is saved

   By default, pytest-cov saves HTML reports in 'htmlcov' folder in current directory.

2. Step 2: Understand common confusion

   Users may think no report generated if they don't check 'htmlcov' folder; plugin installation is needed but question assumes it is installed.

3. Final Answer:

   The HTML report is saved in the current directory as 'htmlcov' -> Option A

4. Quick Check:

   HTML report folder = htmlcov [OK]

Hint: HTML report saved in 'htmlcov' folder by default [OK]

Common Mistakes:

• Assuming HTML report appears in terminal
• Forgetting to look in 'htmlcov' folder
• Thinking XML option is needed for HTML

5. You want to share coverage results with a CI tool that requires XML input. Which pytest command correctly generates the XML coverage report file?

hard

A. pytest --cov=myapp --cov-report=xml

B. pytest --cov=myapp --cov-report=html

C. pytest --cov=myapp --cov-report=term

D. pytest --cov=myapp --cov-report=term-missing

Solution

1. Step 1: Identify XML report option

   The '--cov-report=xml' option generates coverage results in XML format.

2. Step 2: Match option to CI tool requirement

   CI tools needing XML input require this exact option; others generate HTML or terminal output.

3. Final Answer:

   pytest --cov=myapp --cov-report=xml -> Option A

4. Quick Check:

   XML report option = --cov-report=xml [OK]

Hint: Use --cov-report=xml for CI XML coverage [OK]

Common Mistakes:

• Using HTML or terminal options for XML output
• Not specifying any --cov-report option
• Confusing term-missing with XML