🏦 Faribank

Neobank Simulation Engine — Verification & Testing Guide

This README was produced by compiling and running the actual codebase end-to-end — not just reading the source. Every command below was executed; every walkthrough step was scripted against the real CLI and its output was captured. A "Verified Findings" section near the end documents a few real discrepancies discovered along the way.

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📚 Table of Contents

1. Requirements
2. Getting Started
3. Project Architecture
4. Running the Automated Test Suite
5. Running the Interactive CLI
6. Default Seed Data & Validation Rules
7. End-to-End Manual Verification Script
8. Testing the Two Standalone Bonus Modules
9. Exception Reference
10. Verified Findings From Full Code Review
11. Code Quality Summary

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✅ Requirements

Tool	Version	Notes
JDK	17 or newer	build.gradle sets sourceCompatibility = '17'; the codebase also compiles and runs cleanly under JDK 21
Gradle Wrapper	bundled (8.2)	No local Gradle install needed — always use ./gradlew / .\gradlew.bat
Git	any recent version	To clone the repository

Check your JDK before starting:

java -version

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🚀 Getting Started

git clone git@github.com:mxed04/faribank.git
cd faribank

Compile everything without running tests yet (useful as a fast sanity check):

# Unix / macOS
./gradlew clean compileJava compileTestJava

# Windows
.\gradlew.bat clean compileJava compileTestJava

If this succeeds with no errors, the project is ready to test.

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🏗️ Project Architecture

src/main/java/ir/ac/kntu/
├── Main.java                          # Application entrypoint bootstrapping services and CLI loop
├── domain/                            # Core domain models and business entities
│   ├── user/                          # User identity, roles, and KYC verification state
│   │   ├── User.java
│   │   ├── Customer.java
│   │   ├── SupportUser.java
│   │   └── KycStatus.java             # KYC lifecycle: PENDING, APPROVED, REJECTED
│   ├── account/                       # Bank accounts, credit cards, and ledger transactions
│   │   ├── Account.java
│   │   ├── CreditCard.java
│   │   ├── Transaction.java
│   │   └── TransactionType.java       # Transaction kinds: CHARGE, TRANSFER_IN, TRANSFER_OUT
│   ├── contact/                       # User address book entries
│   │   └── Contact.java
│   └── ticket/                        # Customer support and ticketing domain
│       ├── Ticket.java
│       ├── TicketSection.java         # Ticket sections: CONTACTS, TRANSFER, SETTINGS
│       └── TicketStatus.java          # Ticket states: REGISTERED, IN_PROGRESS, CLOSED
├── repository/                        # In-memory thread-safe data persistence layer
│   ├── UserRepository.java
│   ├── AccountRepository.java
│   ├── TransactionRepository.java
│   ├── ContactRepository.java
│   └── TicketRepository.java
├── service/                           # Core business logic and operational services
│   ├── AuthService.java               # Registration, authentication, password verification, KYC checks
│   ├── AccountService.java            # Account charging, balance lookup, ledger date-filtering
│   ├── TransferService.java           # Fund transfers, 0.5% fee calculation, mutual contact validation, receipts
│   ├── ContactService.java            # Address book management and contact privacy toggling
│   ├── TicketService.java             # Support ticket registration, filtering, and operator replies
│   └── SearchService.java             # Levenshtein string similarity engine for fuzzy search (Bonus)
├── ui/                                # Presentation layer (CLI & terminal navigation)
│   ├── MenuContext.java               # Active session context and logged-in user state tracking
│   ├── ConsoleIO.java                 # Standardized I/O wrapper with ANSI colored output (Bonus)
│   ├── menu/                          # Menu and submenu hierarchy supporting Back and Quit routing
│   │   ├── Menu.java                  # Common menu interface or base abstraction
│   │   ├── StartMenu.java
│   │   ├── CustomerMenu.java
│   │   ├── SupportMenu.java
│   │   ├── AccountManagementMenu.java
│   │   ├── TransferMenu.java
│   │   ├── ContactsMenu.java
│   │   ├── SupportTicketsMenu.java
│   │   └── SettingsMenu.java
│   └── report/                        # Financial reporting and analytics output (Bonus)
│       └── HtmlReportGenerator.java   # Standalone HTML statement and CSS cash-flow chart generator
├── util/                              # Common utilities and helper classes
│   ├── Calendar.java                  # Simulated system clock utility (Course template)
│   ├── PasswordValidator.java         # Password strength and complexity enforcement
│   ├── MockDataLoader.java            # In-memory mock data seeder for local testing
│   └── AnsiColor.java                 # Terminal ANSI escape formatting sequences
└── exception/                         # Domain-specific business exceptions
    ├── FaribankException.java
    ├── AuthenticationException.java
    ├── KycPendingException.java
    ├── InsufficientBalanceException.java
    ├── AccountNotFoundException.java
    └── ValidationException.java

flowchart TB
    UI["🖥️ ui — FaribankCli · CustomerCli · SupportCli"] --> SVC
    SVC["⚙️ service — Auth · Account · Transfer · Contact · Settings · Ticket · Support"] --> REPO
    REPO["🗄️ repository — User · Account · Contact · Ticket"] --> DOM
    DOM["🧩 domain — User · Account · Transaction · Contact · Ticket"]
    UI -.not wired.-> EXTRA["service.SearchService · ui.report.HtmlReportGenerator"]

Loading

The dotted line above is intentional — see Verified Findings for details on SearchService and HtmlReportGenerator.

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🧪 Running the Automated Test Suite

Run everything (mirrors CI)

# Unix / macOS
./gradlew clean test

# Windows
.\gradlew.bat clean test

Results are written to build/reports/tests/test/index.html — open it in a browser for a readable report. The GitLab CI pipeline (.gitlab-ci.yml) runs this exact command.

Run one test class at a time

Useful for verifying a single phase/module without waiting on the full suite:

Test Class	Verifies	Command
DomainModelTest	Core entity invariants (Phase 1)	./gradlew test --tests "ir.ac.kntu.domain.DomainModelTest"
AuthServiceTest	Registration, login, KYC lifecycle (Phase 2)	./gradlew test --tests "ir.ac.kntu.service.AuthServiceTest"
AccountServiceTest	Deposits, balances, ledger sorting/filtering (Phase 3)	./gradlew test --tests "ir.ac.kntu.service.AccountServiceTest"
TransferServiceTest	Transfers, fees, mutual contacts (Phase 4)	./gradlew test --tests "ir.ac.kntu.service.TransferServiceTest"
TicketServiceTest	Ticket lifecycle & filtering (Phase 6)	./gradlew test --tests "ir.ac.kntu.service.TicketServiceTest"
SupportServiceTest	Customer search & summaries (Phase 6)	./gradlew test --tests "ir.ac.kntu.service.SupportServiceTest"
ConsoleIoTest	ANSI codes & input parsing (Phase 7)	./gradlew test --tests "ir.ac.kntu.ui.ConsoleIoTest"
SearchServiceTest	Levenshtein fuzzy search (Bonus)	./gradlew test --tests "ir.ac.kntu.service.SearchServiceTest"
HtmlReportGeneratorTest	HTML statement export (Bonus)	./gradlew test --tests "ir.ac.kntu.ui.report.HtmlReportGeneratorTest"
CheckPMDTest	PMD static analysis (src/main, 0 violations expected)	./gradlew test --tests "ir.ac.kntu.style.CheckPMDTest"
CheckStyleTest	Checkstyle naming + indentation (0 errors expected)	./gradlew test --tests "ir.ac.kntu.style.CheckStyleTest"

⚠️ Note: CheckPMDTest and CheckStyleTest are plain JUnit tests (they call the PMD/Checkstyle libraries programmatically), not separate Gradle tasks. There is no ./gradlew pmdMain or ./gradlew checkstyleMain in this project — the commands above (through ./gradlew test --tests ...) are the correct way to run them individually.

Across the whole suite there are 48 @Test methods in 11 test classes — this was counted directly from the source, not estimated.

---

🖥️ Running the Interactive CLI

build.gradle only applies the java plugin (no application plugin), so ./gradlew run does not currently exist as a task in this project. Until the application plugin is added, launch the CLI like this:

# Unix / macOS — compile, then run the compiled classes directly
./gradlew compileJava
java -cp build/classes/java/main ir.ac.kntu.Main

# Windows
.\gradlew.bat compileJava
java -cp build\classes\java\main ir.ac.kntu.Main

💡 Optional: add a real ./gradlew run task

Add this to build.gradle to get a proper run task:

plugins {
    id 'java'
    id 'application'
}
application {
    mainClass = 'ir.ac.kntu.Main'
}

Then ./gradlew run (or .\gradlew.bat run) will work as expected.

Once running, you'll see the main menu:

=== Welcome to Faribank - Neobank Simulation ===
  1) Customer Login
  2) Customer Registration
  3) Support Operator Login
  quit) Exit Faribank

Important navigation detail (confirmed by running the CLI): each customer/support sub-menu (Account Management, Contacts Book, Fund Transfer, Support Inquiries, Account Settings, KYC Verifications, etc.) performs one action and returns immediately to its parent menu — it does not loop internally. To do a second action in the same section (e.g. deposit, then check balance), re-select that menu number again from the parent menu.

---

🔑 Default Seed Data & Validation Rules

Item	Value / Rule
Default operator account	username admin, password Admin@1234 (seeded automatically on startup)
Phone number format	09XXXXXXXXX — exactly 11 digits, starting with 09
National code format	Exactly 10 digits
Password complexity	Minimum 6 characters, at least one uppercase, one lowercase, one digit, one special character
Credit card PIN	Exactly 4 digits (^\d{4}$)
Transfer fee	0.5% of the transfer amount, added on top of the amount deducted from the sender
First account number issued	100001 (increments per KYC approval)
First transaction/ticket IDs	TX-700001 (deposits), TR-800001 (transfers), TCK-900001 (tickets)

---

🔄 End-to-End Manual Verification Script

This exact sequence was run against the compiled project and produced the transcript quoted afterward — every step is confirmed working.

Step-by-step (interactive)

#	Menu	Input	Confirms
1	Main → 2	Register customer Ali (09121234567 / national code 1234567890 / password Str0ng@Pass)	Registration & validation (Phase 1–2)
2	Main → 2	Register customer Sara (09129876543 / 0987654321 / Sara@Pass1)	Duplicate-phone/ID checks work on a second user
3	Main → 3	Login as admin / Admin@1234	Support authentication
4	Support → 1	Approve Ali's phone, then Sara's phone	KYC approval, auto account+card issuance
5	Support → back → Main → 1	Login as Ali	Customer login gated on KYC status
6	Customer → 1 → 2	Deposit 10000000	chargeAccount (Phase 3)
7	Customer → 2 → 2	Add Sara as a contact	Address book (Phase 5)
8	Customer → back → Main → 1	Login as Sara, 2 → 2, add Ali as a contact	Mutual-contact precondition for Step 9
9	Customer → back → Main → 1	Login as Ali, 3 → 2 → Sara's phone → 2000000 → Y	Contact-based transfer + 0.5% fee (Phase 4)
10	Customer → 4 → 1	Section 2 (TRANSFER), describe an issue	Ticket creation (Phase 6)
11	Customer → 5 → 1	Change password	Security settings (Phase 5)
12	Customer → back → Main → 3	Login as admin, 2	Reply to the ticket, mark it CLOSED
13	Support → 3	Search for Ali	⚠️ See Verified Findings — this currently returns no results

Non-interactive version (pipe it straight in)

Save this as smoke-test-input.txt:

2
Ali
Rezaei
09121234567
1234567890
Str0ng@Pass
2
Sara
Ahmadi
09129876543
0987654321
Sara@Pass1
3
admin
Admin@1234
1
09121234567
A
1
09129876543
A
back
1
09121234567
Str0ng@Pass
1
2
10000000
2
2
Sara
Ahmadi
09129876543
back
1
09129876543
Sara@Pass1
2
2
Ali
Rezaei
09121234567
back
1
09121234567
Str0ng@Pass
3
2
09129876543
2000000
Y
4
1
2
Transfer button is not visible on mobile app
back
3
admin
Admin@1234
2
TCK-900001
Thanks for reporting, we are looking into it.
2
3
Ali
back
quit

Then run:

java -cp build/classes/java/main ir.ac.kntu.Main < smoke-test-input.txt

Confirmed output highlights from this exact run:

[SUCCESS] KYC Approved. Account & card generated for: 09121234567   (account 100001)
[SUCCESS] KYC Approved. Account & card generated for: 09129876543   (account 100002)
[SUCCESS] Deposit successful. Tracking ID: TX-700001
[SUCCESS] Contact added successfully: Sara Ahmadi
Tracking Number: TR-800001 | Amount: 2000000.0 | Fee: 10000.0 | Total Deduction: 2010000.0
[SUCCESS] Ticket registered. ID: TCK-900001
[SUCCESS] Password updated successfully.
[SUCCESS] Ticket reply saved and updated successfully.
No users found matching query: Ali        ← see Verified Findings below

The fee math checks out exactly: 2,000,000 × 0.5% = 10,000, so 2,010,000 total is debited from Ali while Sara is credited 2,000,000.

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🔍 Testing the Two Standalone Bonus Modules

SearchService (Levenshtein fuzzy search) and HtmlReportGenerator (HTML statements) are fully implemented and unit-tested, but — confirmed by inspecting Main.java and BankServices.java — neither is wired into any CLI menu. The only ways to exercise them are their unit tests, or calling them directly. jshell (bundled with the JDK) is the fastest way to do the latter without writing a throwaway class:

SearchService

./gradlew compileJava
jshell --class-path build/classes/java/main

import ir.ac.kntu.service.SearchService;
import ir.ac.kntu.repository.*;

var ss = new SearchService(new UserRepository(), new ContactRepository());
ss.calculateLevenshtein("kitten", "sitting")   // → 3 (verified correct)
ss.computeScore("Mohammad", "Mohamad")          // → 0.875
ss.computeScore("Faribank", "bank")             // → 0.85 (substring match)

HtmlReportGenerator

import ir.ac.kntu.repository.*;
import ir.ac.kntu.service.*;
import ir.ac.kntu.domain.user.Customer;
import ir.ac.kntu.ui.report.HtmlReportGenerator;
import java.io.File;

var userRepo = new UserRepository();
var accountRepo = new AccountRepository();
var contactRepo = new ContactRepository();
var auth = new AuthService(userRepo, accountRepo);
var acc = new AccountService(accountRepo, userRepo);

var c = new Customer("Ali", "Rezaei", "09121234567", "1234567890", "Str0ng@Pass");
auth.registerCustomer(c);
auth.approveKyc("09121234567");
acc.chargeAccount("09121234567", 5000000);

var gen = new HtmlReportGenerator();
gen.exportToFile(userRepo.findCustomerByPhone("09121234567").get(), new File("statement.html"));

Open the generated statement.html in a browser to see the profile header, balance cards, cash-flow bar chart, and transaction table — this exact snippet was run to confirm it produces valid, styled HTML.

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⚠️ Exception Reference

All Faribank exceptions are unchecked and extend a single root, so any UI layer can catch one type and handle every domain error consistently:

RuntimeException
 └── FaribankException                 (root)
      ├── ValidationException           general invariant/business-rule violations
      ├── AuthenticationException       invalid login credentials
      ├── UserAlreadyExistsException     duplicate phone/national code on registration
      ├── AccountNotFoundException       missing account, or KYC not approved
      ├── InsufficientFundsException     balance < amount + fee
      └── TicketNotFoundException       unknown ticket ID

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🔬 Verified Findings From Full Code Review

These were discovered by actually compiling and exercising the code (not just reading it), and are worth knowing before you rely on these features:

#	Area	What was verified
1	Support user search is non-functional via the CLI	SupportCli.handleUserSearch() passes the same single query string as phone, first, and last to SupportService.searchCustomers, which requires all three to match (AND logic). In practice, searching by phone-only, first-name-only, or last-name-only all return "No users found" — confirmed by running all three cases. The underlying SupportService method itself is fine if called with only the relevant field populated; the bug is in how SupportCli invokes it.
2	HtmlReportGenerator misclassifies incoming transfers as outflow	TransactionType only has CHARGE and TRANSFER (no TRANSFER_IN), but the chart/table code checks "TRANSFER_IN".equals(type.name()) — which can never be true. Confirmed by generating a report for a customer who received a transfer: their statement shows "Inflow: 0.0 IRR (0%) / Outflow: 100%" even though they only ever received money.
3	ContactService and SettingsService have no unit tests	Confirmed by searching every test file for these class names — neither appears anywhere in src/test. Earlier phase documentation referenced ContactServiceTest/SettingsServiceTest, but these files do not exist in this codebase; the only way to exercise those two services is the CLI walkthrough above.
4	No ./gradlew run task	build.gradle applies only the java plugin; there's no application plugin or mainClass. Covered above with a working alternative and an optional fix.
5	Large amounts print in scientific notation	Balances/amounts are printed via raw double string concatenation, so e.g. 10,000,000 displays as 1.0E7 IRR in the CLI. Not a bug, just worth expecting when eyeballing output.
6	AccountService.filterTransactions, findTransaction, and findAccountByNumber aren't exposed in the CLI	CustomerCli's Account Management menu only offers balance/deposit/full history — date-range filtering and tracking-ID lookup exist and are unit-tested, but are only reachable programmatically or via AccountServiceTest.

None of these block the build or the test suite — ./gradlew test still passes cleanly — but they're the kind of thing worth knowing before a live demo.

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📊 Code Quality Summary

Aspect	Result
Compilation	src/main compiles cleanly with JDK 17 and JDK 21
Automated tests	48 @Test methods across 11 classes
Static analysis	CheckPMDTest and CheckStyleTest both assert zero violations against src/main
CI	.gitlab-ci.yml runs ./gradlew clean test on every push