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Dan Duffek

PROFILE

Dan Duffek

Daniel D. developed and maintained robust test automation and backend features across the LabKey/testAutomation and LabKey/platform repositories, focusing on reliability, data integrity, and cross-platform compatibility. He engineered automated workflows for study import/export, list management, and UI testing, using Java, Selenium, and JUnit to address issues like flaky tests, timezone handling, and special character support in data. Daniel introduced utilities for file management and Excel integration, refactored test infrastructure for maintainability, and implemented stress-tested fixes for concurrency and deadlocks. His work consistently improved CI stability, accelerated feedback cycles, and ensured safer, more predictable releases through comprehensive test coverage and targeted bug fixes.

Overall Statistics

Feature vs Bugs

55%Features

Repository Contributions

55Total
Bugs
15
Commits
55
Features
18
Lines of code
5,102
Activity Months14

Work History

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 (LabKey/testAutomation): Reliability and usability improvements in data-domain/workflow tooling. Delivered a deadlock fix in the Data Class Domain Update with automated stress testing to validate stability under concurrent updates; and introduced SampleFinder Edit Search Cards to enhance filter interaction, improving user experience and productivity. The work included end-to-end test automation aligned with issues (#2866, #2877), enabling faster validation before production deployment.

December 2025

4 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for LabKey/testAutomation focused on UI reliability, data validation, and grid view customization. Delivered stabilizing fixes to flaky UI tests, hardened data handling around sample types and AssayID column, and improved the reliability of grid view customization to reflect changes in the UI. These efforts reduced flaky failures, improved data visibility, and enhanced end-user confidence in test results and grid-driven workflows.

November 2025

2 Commits • 2 Features

Nov 1, 2025

Month: 2025-11. Delivered two high-impact features with direct business value across two repositories, plus reliability improvements that reduce CI feedback cycles. The work emphasizes streamlined data import onboarding and stabilized UI tests, enabling faster shipping and fewer operational incidents.

October 2025

3 Commits • 1 Features

Oct 1, 2025

Delivered robustness enhancements to the test automation suite for LabKey/testAutomation in 2025-10. Key features include UI locator updates, improved API sample handling, and DST-aware test data to ensure reliability across time zones; all aimed at reducing flaky tests and stabilizing CI. Major improvements also consolidated test fixes and utilities to boost maintainability and speed of test cycles. Notable utilities added: EscapeUtil.escapeForExcelSheetName to ensure safe Excel interactions and a Create Files With Specific Dates utility to enable deterministic date-based tests. Business value: higher test reliability, faster feedback loops, and safer data handling across environments, improving release confidence and reducing time to ship.

September 2025

4 Commits • 1 Features

Sep 1, 2025

September 2025 monthly summary: Key features delivered, major bugs fixed, and measurable business impact across test automation and targeted testing. In LabKey/testAutomation, we implemented significant test infrastructure improvements, including a new TestFileUtils.makeLegalFileName utility to sanitize file names; reliability enhancements for the LKSM test suite and FieldSelectionDialog usage; and removal of a module-specific wait in BaseWebDriverTest.waitForPendingRequests to streamline test execution. In LabKey/targetedms, TargetedMS test stability was improved by refactoring element waiting and assertion logic to reduce flaky failures and ensure robust element identification. These efforts collectively shorten CI cycles, increase test reliability, and accelerate release readiness. Technologies demonstrated include Java, test utilities, and WebDriver-based automation.

August 2025

9 Commits • 4 Features

Aug 1, 2025

August 2025: Delivered foundational capabilities, stability improvements, and expanded test coverage across DiscvrLabKeyModules, testAutomation, and platform, enabling faster feedback, more robust data handling, and safer releases. Key features delivered include: Foundation for Array Utilities in FastqcRunner (fcb737c1d558fe9c2555b7c0627c9f8c192f4fd7); UI Test Stability enhancements for PipelineStatusDetailsPage using explicit waits (b761afdd0a23920e5d4bb0c0d6b2c990f4476736); Folder Archiving Test Automation with FolderArchiveDialog (a9e3b50e85d7a4b3fe70bb97d32e96dd578c4c96); Comprehensive Schema Linking Test Coverage across external subfolders with special characters and permissions (b57f033062bacd2709c367c34aa3d26092f9686e); Guard Rapid Updates by DB Type for Sample Types to run only on PostgreSQL (86c519f89ae5d0198eff805b4e67adf8c656386d); Major bugs fixed include: Robust Sample Type Naming and Indexing in Tests to handle default values with special characters and ensure indexing after updates (38aceec2f103caa71f26ad3a405a4d02f2f6db9a; 3a1bb0b32905047779d647e28ad02e40662766e3); Test cleanup in AutoLinkToStudyTest removing unused import (630e4c1e4124f6d8a8225adf90ded2a9ce07dab1); PlateImpl data type fixes to resolve build breaks (463bb63a4b99d5f4de608e3903ab96c880f8f34d). Overall impact: improved reliability of UI tests, stronger data validation, and smoother CI builds, enabling more frequent, confident releases. Technologies/skills demonstrated: Java, test automation, explicit waits, database-aware logic (PostgreSQL vs MSSQL), data modeling, test data generation, and build stability.

July 2025

7 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary highlights: - Focused on reliability, stability, and data integrity across two repos (LabKey/ehrModules and LabKey/testAutomation). - ehrModules: Reliability improvement for Run Report In Browser on the Notification Admin page by replacing a standard click with a wait-and-click and adding predictive waits in tests, addressing race conditions and improving report execution stability. - testAutomation: Consolidated test automation improvements for Sample and List features, stabilizing test suites, reducing flakiness, and strengthening data integrity checks. - NameExpressionTest robustness: Fixed batch ID extraction logic to handle underscores in values, preventing test failures. - Impact: Reduced runtime failures, faster CI feedback, and increased confidence in LabKey reporting and data integrity checks. - Technologies/skills demonstrated: wait-for-click pattern, predictive waits, test automation stabilization, and robust string parsing.

May 2025

4 Commits

May 1, 2025

May 2025: Reliability and audit-logging improvements across LabKey/testAutomation and LabKey/platform driven. Delivered fixes that reduce flaky tests, enable reproducible runs, and strengthen audit trails — accelerating CI feedback and improving trust in study data.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 — LabKey/testAutomation: Delivered List Management Robustness Enhancement with UTF-8 BOM CSV import coverage, improved handling of special characters, and test refactors to boost reliability and maintainability. These changes reduce import-related regressions and improve data integrity in list operations.

March 2025

1 Commits

Mar 1, 2025

March 2025 monthly summary for LabKey/testAutomation: Delivered targeted reliability improvements to the automation suite by fixing DST-related date/time handling and generated field name normalization, aligning tests with the 25.3 release cycle.

February 2025

1 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for LabKey/testAutomation focused on feature delivery and robustness improvements that enhance test coverage when handling special characters in field names and data. The work aligns with reliability and data integrity goals for test automation across diverse datasets.

January 2025

3 Commits • 2 Features

Jan 1, 2025

January 2025 summary for LabKey/testAutomation: Delivered two major test automation enhancements that strengthen upgrade validation and UI robustness, with targeted fixes to flaky tests and test configurations. Key outcomes include a new Server Upgrade Test Suite that validates server upgrades, checks for post-upgrade errors, and verifies that no unknown modules are present; refinements to test configurations improved reliability. In addition, the UI navigation bar robustness refactor uses the refindWhenNeeded mechanism for stable element detection and includes a dedicated FieldSelectionDialog test to validate removing all selected fields and re-adding one. These changes reduce upgrade risk, improve CI feedback, and broaden end-to-end coverage of critical workflows. Demonstrates proficiency in test automation design, robust UI automation, and configuration management.

December 2024

6 Commits • 3 Features

Dec 1, 2024

December 2024 monthly summary for LabKey/testAutomation. Focused on delivering robust data handling, stabilizing automated tests, and modernizing the page structure to improve maintainability and release readiness.

November 2024

8 Commits

Nov 1, 2024

November 2024: Strengthened reliability and cross-platform stability for study import/export and test automation across LabKey/testAutomation and LabKey/platform. Achievements include robust handling of spaces in study names during import/export, encoded file paths, and updated UI locators; explicit waits and timing fixes reduced flaky tests; Windows-specific fixes ensured consistent behavior across OS. Business value: higher CI stability, fewer flaky tests, and more reliable data export/import workflows, enabling faster delivery and fewer regressions.

Activity

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Quality Metrics

Correctness87.8%
Maintainability87.0%
Architecture78.8%
Performance79.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

CSVJavaTextXML

Technical Skills

API TestingAPI testingAutomated TestingAutomationAutomation TestingBackend DevelopmentBuild SystemCSV HandlingConditional LogicCross-Platform CompatibilityDatabase TestingDate and Time FormattingDate and Time HandlingExcel IntegrationFile Management

Repositories Contributed To

5 repos

Overview of all repositories you've contributed to across your timeline

LabKey/testAutomation

Nov 2024 Feb 2026
14 Months active

Languages Used

JavaXMLCSVText

Technical Skills

JavaSeleniumTest AutomationWebDriverDate and Time FormattingDate and Time Handling

LabKey/platform

Nov 2024 Aug 2025
3 Months active

Languages Used

Java

Technical Skills

Backend DevelopmentCross-Platform CompatibilityJavaTest AutomationTestingBuild System

LabKey/ehrModules

Jul 2025 Jul 2025
1 Month active

Languages Used

Java

Technical Skills

Automated TestingFront End DevelopmentSeleniumTest Automation

LabKey/targetedms

Sep 2025 Nov 2025
2 Months active

Languages Used

Java

Technical Skills

JavaSeleniumTest Automationtest automation

LabKey/DiscvrLabKeyModules

Aug 2025 Aug 2025
1 Month active

Languages Used

Java

Technical Skills

Java Development

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