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+# Table of Content <!-- omit in toc -->
+
+- [How to build](#how-to-build)
+- [How to test](#how-to-test)
+
+## How to build
+
+Larra dev environment provides a dev container environment with all required tools, libraries and configured (locally hosted) ejabberd server.
+
+Build steps:
+
+- Install **docker**, **docker-compose** and **VS Code** and open a project in Dev Container
+- Build project using Cmake
+  - Using VS Code Task: "Build Debug GCC"
+  - Manually
+    ```bash
+    mkdir -p build && cd build
+    cmake -DCMAKE_BUILD_TYPE=Debug -DENABLE_EXAMPLES=ON -DENABLE_TESTS=ON .. && cmake --build . --parallel `nproc`
+    ```
+
+## How to test
+
+### Unit tests
+
+- Build project with **-DENABLE_TESTS=ON** to enable GTests
+- Launch tests
+  ```bash
+  ./build/larra_xmpp_tests
+  ```
+
+### Module tests
+
+- Launch ejabber server by opening a project in a Dev Container environment or start it manually
+- Launch client
+  ```bash
+  /workspaces/larra/build/examples/output/connect
+  ```
+
+Make sure that larra client with your change is able to pass all tests without errors. For now it supports only **Plain Authentication** check.
+
+Successful Plain Authentication logs:
+
+```bash
+[info] [connect.cpp] Connecting client...
+[info] [printer_stream.hpp] Writing data to stream: <?xml version="1.0"?><stream:stream xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" from="test1@localhost" to="localhost" version="1.0" xml:lang="en">
+[info] [printer_stream.hpp] Data writing completed: 172
+[info] [printer_stream.hpp] Reading data from stream:
+[info] [printer_stream.hpp] Readed data: <?xml version='1.0'?><stream:stream id='3964734841065883241' version='1.0' xml:lang='en' xmlns:stream='http://etherx.jabber.org/streams' to='test1@localhost' from='localhost' xmlns='jabber:client'>
+[info] [printer_stream.hpp] Reading data from stream:
+[info] [printer_stream.hpp] Readed data: <stream:features><mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><mechanism>PLAIN</mechanism></mechanisms><register xmlns='http://jabber.org/features/iq-register'/></stream:features>
+[info] [printer_stream.hpp] Writing data to stream: <auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" mechanism="PLAIN">AHRlc3QxAHRlc3Qx</auth>
+[info] [printer_stream.hpp] Data writing completed: 88
+[info] [printer_stream.hpp] Reading data from stream:
+[info] [printer_stream.hpp] Readed data: <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>
+[info] [connect.cpp] Done connecting client!
+```
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