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Test Data Generator

skill-anhtester-claude-testing-kit-test-data-generator · by anhtester

Skill sinh test data có cấu trúc, unique, traceable cho automation tests, bao gồm positive, negative, boundary và edge cases.

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Install

$ agentstack add skill-anhtester-claude-testing-kit-test-data-generator

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • Prompt-injection patterns
  • Secret / credential exfiltration
  • Dangerous shell & filesystem operations
  • Untrusted network calls
  • Known-malicious package signatures

What it can access

  • Network access No
  • Filesystem access No
  • Shell / process execution No
  • Environment & secrets No
  • Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

Test Data Generator

Purpose: Generate reliable test data for automation tests.


When to Use

Use this skill when:

  • Creating test data for new test cases
  • Generating boundary and edge case data
  • Setting up data-driven tests
  • Creating API request payloads

Responsibilities

Generate test data for:

  • Registration forms
  • Login credentials
  • Form submissions
  • API payloads
  • Search queries
  • File uploads

Data Rules

All generated data must be:

  • Unique — No duplication within test suite
  • Deterministic — Same seed produces same data (when needed)
  • Traceable — Can identify which test generated it

Unique Data Pattern

Recommended format:

__

Examples:

auto_register_20260402133000
test_login_1712024100

Common Data Types

Email

auto__@test.com

Example: auto_register_20260402@test.com

Username

user__

Example: user_login_20260402133000

Phone

Random 10-digit number starting with valid prefix

Example: 0912345678

Password

Mix of uppercase, lowercase, digits, special chars

Example: Test@12345


Data Categories

Positive Data (Happy Path)

  • Valid format, within constraints
  • All required fields filled
  • Standard business values

Negative Data

  • Missing required fields
  • Invalid format (wrong email, short password)
  • Invalid characters
  • Already existing values (duplicate check)

Boundary Values

  • Minimum length (e.g., 1 character)
  • Maximum length (e.g., 255 characters)
  • Min + 1, Max - 1
  • Empty string vs null
  • Zero, negative numbers

Edge Cases

  • Unicode / special characters
  • Very long strings
  • SQL injection patterns (for security testing)
  • HTML tags in text fields
  • Leading/trailing whitespace

Constraints

Test data must:

  • Respect field validation rules (from DOM inspection)
  • Match input format (date format, phone format)
  • Avoid duplication across test runs
  • Not contain real PII (personal data)

Output Format

Provide data in structured format:

{
  "positive": [
    { "email": "auto_tc01_20260402@test.com", "password": "Test@12345" }
  ],
  "negative": [
    { "email": "", "password": "Test@12345", "expectedError": "Email is required" },
    { "email": "invalid-email", "password": "Test@12345", "expectedError": "Invalid email format" }
  ],
  "boundary": [
    { "email": "a@b.co", "password": "12345678", "note": "Min length" }
  ]
}

Multi-Step Data Pipeline (Cross-Module)

> Mở rộng cho bài toán: test data cần đi qua nhiều modules nối tiếp mới tạo ra được data hoàn chỉnh cho module cuối.

Khi nào dùng

  • Tính năng đi qua chuỗi N modules (VD: Đối tác → Thanh toán → Thuế → Biên bản)
  • Data module sau phụ thuộc output module trước (Reference fields)
  • Cần tạo data thật trên hệ thống qua browser

Data Chain Pattern

Module 1 → Output: {id_1, code_1}
    ↓ (Reference)
Module 2 → Input: {id_1} → Output: {id_2}
    ↓ (Reference)
Module 3 → Input: {id_1, id_2} → Output: {id_3}
    ↓ (Reference)
Module N → Input: {id_1..id_N-1} → Output: Final Result

Field Classification

| Loại field | Mô tả | Cách sinh data | |-----------|-------|----------------| | Dimension field | Giá trị thuộc chiều kết hợp trong ma trận | Lấy chính xác từ bộ combo — KHÔNG random | | Supporting field | Bắt buộc nhưng không phải dimension | Random + unique + traceable | | Reference field | ID/code từ output module trước | Copy từ output module trước trong chuỗi | | Computed field | Tự tính từ formula/business rules | Tính theo formula — phải verify |

Data Chain Tracing Format

auto_combo{XX}_{module_short}_{timestamp}

Ví dụ cho combo 01:

Module 1: partner_name  = "auto_c01_partner_1712049200"
Module 2: payment_desc  = "auto_c01_payment_1712049200"
Module 3: tax_note      = "auto_c01_tax_1712049200"
→ Có thể trace: combo 01 tạo ra những data nào ở mỗi module

Combinatorial Data Generation

> Sinh bộ data cho ma trận kết hợp đa chiều — mỗi bộ kết hợp = 1 bộ data hoàn chỉnh.

Khi nào dùng

  • Đã có ma trận kết hợp (từ /generate_cross_module_test_plan)
  • Cần sinh N bộ data tương ứng N bộ kết hợp
  • Mỗi bộ data phải có expected output (template, formula, computed values)

Combinatorial Data Structure

{
  "combination_id": "COMBO_01",
  "dimensions": {
    "D1": "value_from_matrix",
    "D2": "value_from_matrix"
  },
  "module_data": {
    "module_1": { "field1": "...", "field2": "..." },
    "module_2": { "ref_from_module1": "...", "field3": "..." }
  },
  "expected_output": {
    "template": "EXPECTED_TEMPLATE_CODE",
    "formula": "Amount × Rate",
    "computed_values": { "total": 110000000 }
  }
}

Rules cho Combinatorial Data

| # | Rule | |---|------| | 1 | Dimension values PHẢI đúng 100% so với ma trận — KHÔNG random | | 2 | Mỗi combo dùng data riêng (unique per combo) | | 3 | Computed values phải đúng theo formula | | 4 | Mỗi combo PHẢI có expected output | | 5 | Traceable: prefix auto_combo{XX} |

Workflow tham chiếu

  • /generate_cross_module_test_plan → Sinh ma trận kết hợp (input cho skill này)
  • /generate_combinatorial_test_data → Workflow chính dùng skill này cho combinatorial data

Rules References

  • .claude/rules/automation_rules.md — Test data generation rules (Section 2)

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

Reviews

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Versions

  • v0.1.0 Imported from the upstream source.