tufyalahmmed/k6-practice-

1. This repository is not an application under test; it is a small k6 performance-testing harness. Its architecture is centered on one executable load-test script, a generated results artifact, and lightweight repo guidance for beginners.

2. The main executable unit is scripts/first_k6_script.js. k6 treats this file as the test program: it defines the virtual-user workload, the target endpoint, pacing, checks, and performance thresholds. In diagram terms, this is the “test client” layer.

3. The primary runtime dependency is k6 itself. The script runs inside the k6 engine, not Node.js or a browser. That matters architecturally because the script is an HTTP-level load generator, not a UI automation tool.

4. The core data flow is simple: k6 repeatedly executes the script’s default function, sends HTTP requests to the configured base URL, receives responses, and records timings, success/failure, and throughput metrics. The response object then feeds both checks and metrics collection.

5. The target system is external to the repository and is injected through BASE_URL. The default points to https://test.k6.io, but the script is designed to be reusable against any environment by overriding that value at runtime. This makes the target endpoint a configuration boundary rather than a hardcoded dependency.

6. The workload model is defined by k6 options such as virtual users and duration. Conceptually, these options control the traffic generator: how many simulated users run concurrently and for how long they produce requests. This is the main load-shaping boundary in the repo.

7. The validation layer consists of check(...) assertions and thresholds such as http_req_duration. Checks validate individual responses, while thresholds define pass/fail performance gates over the whole run. Together they separate functional correctness from performance acceptability.

8. sleep(1) is part of the pacing model. It prevents the test from behaving like a tight loop and helps approximate human think time. In the architecture diagram, this sits between request iterations as a throttling/pacing element.

9. report.html is the obvious reporting artifact in the repository. Even though the repo is centered on terminal execution, this file suggests a persisted HTML summary of test results or a sample output report. It represents the “results/consumption” side of the flow after execution.

10. The .github folder is supporting infrastructure rather than test logic. It likely contains repo instructions or automation guidance, but it does not change the core runtime architecture. It is part of the project’s maintainability and onboarding boundary, not the load-testing pipeline itself.

11. End-to-end, the architecture is: engineer edits the k6 script, runs k6 from the repo root, k6 generates concurrent HTTP traffic to the configured target, checks and thresholds evaluate the responses, and results are observed in terminal output and/or the HTML report artifact. There are no backend services, databases, or build steps inside this repository beyond the load-test execution itself.

12. If you draw it, the key boxes are: developer inputs, scripts/first_k6_script.js, k6 runtime, external target application, and results/reporting. The main arrows are configuration into the script, requests out to the target, and metrics/reporting back to the operator.