# tufyalahmmed/k6-practice- architecture

> Architecture diagram of the GitHub repository tufyalahmmed/k6-practice-, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-27). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/tufyalahmmed/k6-practice-
- Repository: https://github.com/tufyalahmmed/k6-practice-

## Overview

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.

Main entry points: [`scripts/first_k6_script.js`](https://github.com/tufyalahmmed/k6-practice-/blob/main/scripts/first_k6_script.js) (k6 script), [`README.md`](https://github.com/tufyalahmmed/k6-practice-/blob/main/README.md) (README), [`.github/INSTRUCTIONS.md`](https://github.com/tufyalahmmed/k6-practice-/blob/main/.github/INSTRUCTIONS.md) (Instructions), [`report.html`](https://github.com/tufyalahmmed/k6-practice-/blob/main/report.html) (report.html)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_authoring["Authoring"]
  node_developer(("Developer<br/>operator"))
  node_readme["README<br/>guide<br/>[README.md]"]
  node_instructions["Instructions<br/>repo guidance<br/>[INSTRUCTIONS.md]"]
end

subgraph group_runtime["Runtime"]
  node_script["k6 script<br/>test script<br/>[first_k6_script.js]"]
  node_options{{"Load shape<br/>k6 options"}}
  node_baseurl(("Base URL<br/>config boundary"))
  node_pacing(("Pacing<br/>sleep control"))
  node_k6[("k6 engine<br/>runtime")]
  node_request["HTTP request<br/>load action"]
  node_checks{{"Checks<br/>response validation"}}
  node_thresholds{{"Thresholds<br/>perf gate"}}
  node_target[("Target app<br/>external system")]
end

subgraph group_results["Results"]
  node_metrics["Metrics<br/>k6 output"]
  node_report["report.html<br/>results artifact<br/>[report.html]"]
end

node_developer -->|"reads"| node_readme
node_developer -->|"follows"| node_instructions
node_developer -->|"edits"| node_script
node_script -->|"defines"| node_options
node_script -->|"reads"| node_baseurl
node_script -->|"includes"| node_pacing
node_developer -->|"runs"| node_k6
node_k6 -->|"executes"| node_script
node_k6 -->|"drives"| node_request
node_request -->|"sends"| node_target
node_target -->|"responds"| node_request
node_request -->|"evaluated by"| node_checks
node_request -->|"emits"| node_metrics
node_checks -->|"updates"| node_metrics
node_options -->|"influences"| node_thresholds
node_thresholds -->|"assesses"| node_metrics
node_k6 -->|"writes"| node_report

click node_readme "https://github.com/tufyalahmmed/k6-practice-/blob/main/README.md"
click node_instructions "https://github.com/tufyalahmmed/k6-practice-/blob/main/.github/INSTRUCTIONS.md"
click node_script "https://github.com/tufyalahmmed/k6-practice-/blob/main/scripts/first_k6_script.js"
click node_report "https://github.com/tufyalahmmed/k6-practice-/blob/main/report.html"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_developer,node_readme,node_instructions toneBlue
class node_script,node_options,node_baseurl,node_pacing,node_k6,node_request,node_checks,node_thresholds,node_target toneAmber
class node_metrics,node_report toneMint
```

## Components

### Authoring

How the test is written and configured

- **Developer**: operator · Edits the script and runs the load test
- [README](https://github.com/tufyalahmmed/k6-practice-/blob/main/README.md): guide · Introductory repo guidance · `README.md`
- [Instructions](https://github.com/tufyalahmmed/k6-practice-/blob/main/.github/INSTRUCTIONS.md): repo guidance · Supplemental onboarding notes · `.github/INSTRUCTIONS.md`

### Runtime

How k6 executes the load test

- [k6 script](https://github.com/tufyalahmmed/k6-practice-/blob/main/scripts/first_k6_script.js): test script · Main executable load-test program · `scripts/first_k6_script.js`
- **Load shape**: k6 options · Virtual users and duration control traffic volume and runtime
- **Base URL**: config boundary · Target endpoint injected at runtime via BASE_URL
- **Pacing**: sleep control · Pauses between iterations to avoid a tight loop
- **k6 engine**: runtime · Executes the script and orchestrates HTTP load generation
- **HTTP request**: load action · Repeated request sent to the target application
- **Checks**: response validation · Per-response assertions on returned data
- **Thresholds**: perf gate · Run-level performance pass/fail criteria
- **Target app**: external system · External system under load, configured outside the repo

### Results

How outcomes are observed and shared

- **Metrics**: k6 output · Timings, success rates, and throughput collected during execution
- [report.html](https://github.com/tufyalahmmed/k6-practice-/blob/main/report.html): results artifact · Persisted HTML summary of test results · `report.html`

## Connections

- Developer → README: reads · Uses repo guidance to get started
- Developer → Instructions: follows · Uses onboarding notes when present
- Developer → k6 script: edits · Configures the k6 workload and assertions
- k6 script → Load shape: defines · Sets concurrency and duration
- k6 script → Base URL: reads · Targets the endpoint configured by BASE_URL
- k6 script → Pacing: includes · Adds think time between iterations
- Developer → k6 engine: runs · Invokes the k6 engine against the script
- k6 engine → k6 script: executes · Runs the default function repeatedly
- k6 engine → HTTP request: drives · Generates repeated HTTP traffic
- HTTP request → Target app: sends · Issues load against the external application
- Target app → HTTP request: responds · Returns response payloads and timings
- HTTP request → Checks: evaluated by · Each response is validated by checks
- HTTP request → Metrics: emits · Contributes timing and throughput data
- Checks → Metrics: updates · Check results affect reported success/failure
- Load shape → Thresholds: influences · Load shape determines the run over which thresholds apply
- Thresholds → Metrics: assesses · Aggregates performance metrics into pass/fail gates
- k6 engine → report.html: writes · Produces a persisted summary artifact when reported