DUONG Phu-Hiep duongphuhiep

PART 1 - Solitary vs Sociable Unit Test (The "London School" vs. "Detroit School")

Term	Scope	Mocks
Unit Test (Solitary)	One method / one class	All direct dependencies.
Unit Test (Sociable)	One feature / multiple classes	Only external systems (DB/API).
Integration Test	System + external	No mocks (or very few).

Example: we want to unit test the PaymentService class which depends on IPaymentExecutor and IPaymentRecorder

IPaymentExecutor calls external PaypalApi

ça fait 1 moment que j'avais quitté lemonway, j'ai appris bcp des choses, voici quelque découvert qui peut être useful pour vous mes amis!

Techno 1) MSSQL Database in a DACPAC file

Reference: https://learn.microsoft.com/en-us/sql/tools/sql-database-projects/concepts/data-tier-applications/unpack-dacpac-file?view=sql-server-ver17

The .dacpac file is your database's "blueprints." It includes:

Tables and Indexes: Columns, data types, primary/foreign keys.

0. Treat warning as error

in your .csproj

<TreatWarningsAsErrors>true</TreatWarningsAsErrors>

Do it each time you create new project before it is too late.

1. try/catch the right way

a) Don’t `try/catch` whenever you feel like it

How to Review PRs (or MRs) of unfamiliar C# codes base?

If you have to review a Pull Request (or Merge Request) in an unfamiliar C# codebase, what should you check? Here is my checklist for reviewing a C# codebase without fully knowing what it does:

Since we don’t know much about what the code is doing, the review should focus on best practices:

Are there tests that cover all the changes? If not, is there a justified reason why the changes are not unit-testable? (Yes, that can happen.)
Challenge any unjustified try/catch blocks.
Challenge the use of Generics or Reflection (often a sign of over-engineering).
Challenge the use of Inheritance (may indicate poor design or over-engineering).

Logging best practices

When generate a log message

Major branching points in your code
When errors or unexpected values are encountered
Any IO operations: calling database / stored proc or make http request
Significant domain events
Request failures and retries
Beginning and end of time-consuming operations

Problem

Your HTML page (the host page) has an Iframe. The Iframe source is on other domain, so you will have to use the window.postMessage() for cross-origin communication. But this communication is only in 1 direction (The Iframe can inform the Host or the Host can inform the Iframe)

This article shows you how to make the Request/Reply communication using postMessage() and MessageChannel combination.

The article did not show you how to add a timeout to the communication, so the Iframe might wait forever if the Host did not response.

I will resume the technique by some codes snippets and at the same time add the missing timeout implementation.

	/* Default value */
	:root {
	color-scheme: light;
	--rz-alert-message-margin: 0.125rem 0;
	--rz-alert-icon-margin: 0.125rem 0;
	--rz-base: #eeeeee;
	--rz-base-50: #fafafa;
	--rz-base-100: #f5f5f5;
	--rz-base-200: #eeeeee;
	--rz-base-300: #e0e0e0;

	using System.Security.Cryptography;
	using System.Text;

	namespace Lemonway.TransactionService.Application
	{
	public static class AesEncryptionHelper
	{
	public static string Encrypt(string payload, string secret)
	{
	byte[] iv = new byte[16];

	// Place your key bindings in this file to override the defaultsauto[]
	[
	{
	"key": "ctrl+t",
	"command": "workbench.action.togglePanel"
	},
	{
	"key": "ctrl+shift+f4",
	"command": "workbench.action.closeOtherEditors"
	},