Complete Submission 30 Test Cases v1.0 Final
🎯 Quality Assurance Engineering Intern — Assessment Submission

GoSMS SMS Top-Up
QA Test Plan

A complete, professional-grade Quality Assurance assessment for the GoSMS SMS Credit Top-Up workflow — covering architecture analysis, state machine modelling, 30 detailed test cases, risk registers, and mitigation strategies.

📋 Sourav
🏢 Mulah Technologies, Malaysia
🌐 Hiredly Platform
📅 26 February 2026
30
Test Cases
10
System States
24
Failure Points
19
Risk Entries
📦 Assessment Deliverables
Five Complete Submissions
Click any section to view the full detailed content
↗📄
Deliverable 01
QA Test Plan & Feature Analysis
Complete test strategy, feature overview, 9-step workflow, system architecture breakdown, 10 assumptions, and 24 failure point catalogue.
Feature AnalysisArchitectureStrategy
 ↗🗺
Deliverable 02
Professional QA Flowchart
Multi-layer flowchart with all decision gates, failure paths, retry logic, rollback indicators, and state transition reference table (S0–S9).
State MachineFlow DesignS0→S9
 ↗🧪
Deliverable 03
Complete Test Case Tables
30 test cases across 7 categories: Happy Path, Input Validation, Integration, Email, Database, Concurrency, and Multi-Company Allocation.
10 Critical15 High5 Medium
 ↗⚠️
Deliverable 04
Risk & Mitigation Register
19 risk entries across 4 severity tiers covering financial risk, API dependency, data integrity, security threats, and operational continuity.
Risk MatrixSeverity RatingsMitigations
 ↗🏁
Deliverable 05
Conclusion & QA Insights
Key findings, release criteria (Go/No-Go), post-release monitoring plan, QA philosophy, and professional candidate submission statement.
Release CriteriaInsightsFinal Assessment
🏗 System Architecture
5-Layer Architecture Overview
Each layer analysed independently for failure points and risk
LAYER 01
🖥
UI Layer
Input validation, brand dropdown, outlet rendering, submit button state
LAYER 02
⚙️
Business Logic
Company mapping, aggregation, total calculation, transaction ID generation
LAYER 03
🔌
QuickBooks API
Quotation creation, idempotency, retry logic, error handling
LAYER 04
📧
Email Service
SMTP delivery, retry queue, non-blocking flow design
LAYER 05
🗄
Database
Atomic writes, rollback, row-level locking, audit trail
🧠 Core QA Principles Applied
Professional QA Philosophy
⚛️
Atomicity First
All write operations verified as atomic — complete success or complete rollback. No partial state permitted in a financial system.
🔑
Idempotency
Unique Transaction IDs ensure that retry submissions or network duplicates never result in duplicate financial records or double-credits.
🗺
Mapping Accuracy
Outlet-to-Company mapping verified at the DB level — not just UI. Credit allocation accuracy is the single most critical business requirement.
🛡
Graceful Failure
Every failure path terminates cleanly with informative user messages, full error logging, and a clear Transaction ID for support reference.
🔄
Concurrency Safety
Row-level locking tested under simultaneous submission conditions. Race conditions and lost updates explicitly verified at the database level.
📋
Audit Trail
Every transaction — success or failure — must produce a complete audit log entry for financial compliance, reconciliation, and regulatory purposes.