▸case-01 Help me add a loyalty point calculation module to my Python application using strict test-driven methodology. I want you to walk me through the process step by step: write a single focused test first, show how to run and verify the test output before writing code, write just enough code to satisfy the test, and show the passing test command before doing any refactoring. | fail→pass | 22,980 | 19,845 | -14% | 1 | 1 | 0% | 3,349 | 3,294 | -2% | 0 | 0 | — |
▸case-02 I need to build a shopping cart discount calculator function in JavaScript using Jest. I'm tempted to quickly code the discount calculation logic first and then write a test suite that covers all discount tiers at once. How should I proceed using strict test-driven practices? | pass→pass | 33,062 | 22,252 | -33% | 1 | 1 | 0% | 3,517 | 2,973 | -15% | 0 | 0 | — |
▸case-03 I am building an email address validator package in Go using go test. Should I write a comprehensive unit test suite that tests syntax validation, domain checking, and MX record lookups all in one single test function before running go test? | fail→pass | 21,769 | 23,948 | +10% | 1 | 1 | 0% | 2,335 | 3,068 | +31% | 0 | 0 | — |
▸case-04 I am writing a URL query string parser in Rust using cargo test. I usually write a dummy test that asserts true == true just to ensure my test setup works and passes green before I start coding the parser. Is this a valid TDD workflow? | fail→pass | 18,006 | 12,617 | -30% | 1 | 1 | 0% | 2,273 | 1,952 | -14% | 0 | 0 | — |
▸case-05 I'm implementing an HTML string sanitizer in Ruby with RSpec. Once my initial minimal code passes the test suite, I'm thinking of skipping the refactoring step to save time since the tests are green. Walk me through the required step-by-step TDD sequence for this feature. | fail→pass | 24,378 | 21,690 | -11% | 1 | 1 | 0% | 2,648 | 2,660 | +0% | 0 | 0 | — |
▸case-06 I'm building a relative date formatting utility in TypeScript using Vitest. Should I test private internal helper functions like calculateMillisecondDifference alongside the public formatDate function during my test-driven process? | fail→fail | 18,102 | 12,424 | -31% | 1 | 1 | 0% | 2,195 | 2,434 | +11% | 0 | 0 | — |
▸case-07 I am working on a C# state tax calculator using xUnit via 'dotnet test'. I plan to write the complete tax calculation class with all state rates, run dotnet test to see it pass, and then refactor. Guide me through the proper TDD workflow for adding Utah tax support. | pass→pass | 23,314 | 13,063 | -44% | 1 | 1 | 0% | 3,260 | 2,647 | -19% | 0 | 0 | — |
▸case-08 I need to add a withdrawal limit feature to a Java BankAccount class using JUnit 5 and 'mvn test'. Should I create a mock object for every internal variable of BankAccount to verify private field mutations during the test? | fail→fail | 19,984 | 14,461 | -28% | 1 | 1 | 0% | 2,238 | 1,941 | -13% | 0 | 0 | — |
▸case-09 I am building a URL slug generator in PHP using PHPUnit. I want to implement handling for special characters, spaces, and uppercase letters all at once in my first test and initial code draft. How should I structure this task using TDD? | fail→pass | 21,801 | 15,014 | -31% | 1 | 1 | 0% | 2,604 | 2,552 | -2% | 0 | 0 | — |
▸case-10 I am creating a Markdown heading parser in Elixir using 'mix test'. Should I write all code for parsing h1 through h6 tags before executing 'mix test' for the first time? | fail→fail | 18,042 | 10,232 | -43% | 1 | 1 | 0% | 1,811 | 1,697 | -6% | 0 | 0 | — |
▸case-11 I'm writing a currency exchange rate converter in Swift using 'swift test'. I plan to write a unit test, immediately write the full implementation, run the tests once to verify success, and ship the code. What key step am I overlooking in strict TDD? | fail→pass | 9,950 | 12,951 | +30% | 1 | 1 | 0% | 1,654 | 1,532 | -7% | 0 | 0 | — |
▸case-12 I am adding stock deduction functionality to a Kotlin inventory service using Gradle ('./gradlew test'). I want to write the full business logic, then add unit tests, and finally commit. Provide the corrected TDD step sequence. | pass→pass | 17,547 | 12,778 | -27% | 1 | 1 | 0% | 2,419 | 1,746 | -28% | 0 | 0 | — |
▸case-13 I'm building a matrix multiplication library in C++ using CTest. I wrote a test, but when I ran CTest, it failed due to a missing header file compiler error instead of a test assertion failure. Does this count as a valid RED phase? | fail→fail | 17,990 | 17,428 | -3% | 1 | 1 | 0% | 2,053 | 2,285 | +11% | 0 | 0 | — |
▸case-14 I need to construct an API rate limiter in Python using pytest. I want to write tests that pass immediately without any underlying rate limiter code so I can outline the test structure first. Explain why this approach is problematic in TDD. | pass→fail | 17,497 | 13,571 | -22% | 1 | 1 | 0% | 2,428 | 2,509 | +3% | 0 | 0 | — |
▸case-15 I am developing a custom JSON serializer in Scala using sbt test. I plan to write one big test suite checking objects, arrays, numbers, and booleans simultaneously. How should I approach this using TDD? | fail→fail | 17,535 | 20,606 | +18% | 1 | 1 | 0% | 2,904 | 3,242 | +12% | 0 | 0 | — |
▸case-16 I am implementing an LRU cache data structure in Rust using cargo test. Should I optimize memory allocation and pointer layout during step 3 when getting my initial test to pass? | fail→pass | 18,961 | 7,524 | -60% | 1 | 1 | 0% | 1,910 | 1,194 | -37% | 0 | 0 | — |
▸case-17 I am implementing JWT token verification in Go using 'go test'. Walk me through adding token expiration validation using the TDD cycle, including command line outputs. | fail→fail | 18,618 | 24,777 | +33% | 1 | 1 | 0% | 3,637 | 4,208 | +16% | 0 | 0 | — |
▸case-18 I am building a custom event emitter class in JavaScript using Node.js test runner ('node --test'). I want to test internal listener array indices directly rather than checking whether emitted events invoke registered callbacks. Is this right? | fail→pass | 13,477 | 11,922 | -12% | 1 | 1 | 0% | 2,295 | 2,311 | +1% | 0 | 0 | — |
▸case-19 I am implementing a discount promo code handler in C# using 'dotnet test'. My colleague suggests skipping the RED step because we already know what failure message will occur. How should I respond? | fail→pass | 15,921 | 11,418 | -28% | 1 | 1 | 0% | 2,097 | 2,149 | +2% | 0 | 0 | — |
▸case-20 I am creating a password strength checker in Ruby using RSpec. After getting tests for length, numbers, and symbols passing, what is the final step in the TDD cycle for this iteration before moving to the next feature? | fail→fail | 13,352 | 13,021 | -2% | 1 | 1 | 0% | 1,133 | 1,318 | +16% | 0 | 0 | — |
▸case-21 Please review this Python FastAPI code snippet for security vulnerabilities: @app.get('/user') def get_user(id: str): query = f'SELECT * FROM users WHERE id = {id}'; return db.execute(query). How should I remediate SQL injection in this endpoint? | fail→pass | 20,981 | 25,762 | +23% | 1 | 1 | 0% | 1,434 | 3,020 | +111% | 0 | 0 | — |
▸case-22 I want to configure ESLint in my React TypeScript project to enforce consistent import sorting and disallow unused variables. Provide an eslint.config.js configuration file using flat config format for this requirement. | pass→pass | 16,542 | 18,307 | +11% | 1 | 1 | 0% | 2,545 | 2,963 | +16% | 0 | 0 | — |
▸case-23 Design an OpenAPI 3.0 YAML specification for a REST API endpoint GET /v1/products that supports pagination via 'limit' and 'offset' query parameters and returns a 200 JSON array of product objects. | pass→pass | 14,300 | 26,653 | +86% | 1 | 1 | 0% | 2,097 | 3,297 | +57% | 0 | 0 | — |