Test result trends in Jenkins - Mini Project: Build & Apply

Test Result Trends in Jenkins

📖 Scenario: You are a Jenkins administrator who wants to track how test results change over time for a software project. This helps the team see if tests are improving or failing more often.

🎯 Goal: Build a simple Jenkins pipeline script that collects test results from multiple builds and prints a trend summary showing how many tests passed and failed in each build.

📋 What You'll Learn

Create a list variable called builds with test result data for 3 builds

Add a variable called threshold to mark the minimum passing tests

Use a for loop to analyze each build's test results and create a summary list

Print the summary list showing test pass/fail trends

💡 Why This Matters

🌍 Real World

Tracking test result trends helps teams quickly spot if recent changes break tests or improve quality.

💼 Career

Jenkins administrators and DevOps engineers often create scripts to analyze build data and report test health.

1

Create test result data

Create a list variable called builds with 3 dictionaries. Each dictionary should have keys build_number, passed, and failed with these exact values: build 1: passed 50, failed 5; build 2: passed 48, failed 7; build 3: passed 52, failed 3.

Jenkins

# Create the list variable builds with 3 dictionaries for test results
# Your code here

Need a hint?

Think of builds as a list of snapshots showing test results for each build.

2

Add a passing threshold

Add a variable called threshold and set it to 50. This will be the minimum number of passed tests to consider a build successful.

Jenkins

builds = [
    {'build_number': 1, 'passed': 50, 'failed': 5},
    {'build_number': 2, 'passed': 48, 'failed': 7},
    {'build_number': 3, 'passed': 52, 'failed': 3}
]
# Add the threshold variable below
# Your code here

Need a hint?

This threshold helps decide if a build's test results are good enough.

3

Analyze test results with a loop

Use a for loop with variables build to go through each item in builds. Inside the loop, create a string status that is 'PASS' if build['passed'] is greater than or equal to threshold, otherwise 'FAIL'. Append a dictionary with keys build_number and status to a list called summary. Initialize summary as an empty list before the loop.

Jenkins

builds = [
    {'build_number': 1, 'passed': 50, 'failed': 5},
    {'build_number': 2, 'passed': 48, 'failed': 7},
    {'build_number': 3, 'passed': 52, 'failed': 3}
]
threshold = 50

# Initialize summary list
# Use a for loop to analyze each build and add status
# Your code here

Need a hint?

Use a simple if-else inside the loop to decide the status for each build.

4

Print the test result trend summary

Write a print statement to display the summary list.

Jenkins

builds = [
    {'build_number': 1, 'passed': 50, 'failed': 5},
    {'build_number': 2, 'passed': 48, 'failed': 7},
    {'build_number': 3, 'passed': 52, 'failed': 3}
]
threshold = 50

summary = []
for build in builds:
    status = 'PASS' if build['passed'] >= threshold else 'FAIL'
    summary.append({'build_number': build['build_number'], 'status': status})

# Print the summary list below
# Your code here

Need a hint?

Just print the summary list to see the trend.