Add testing instruction to README

README.md

@@ -25,11 +25,11 @@ This project came into existence as an application exercise in a course on regul
 For those still on *Ubuntu Trusty*, the default cmake version is still 2.8.12, so there is a ppa available with a more up-to-date version.
 
 Run
-```sh
-sudo apt-get update && sudo apt-get -y install software-properties-common; \
-sudo add-apt-repository -y ppa:george-edison55/cmake-3.x; \
-sudo apt-get update && sudo apt-get install -y cmake
-```
+
+    sudo apt-get update && sudo apt-get -y install software-properties-common; \
+    sudo add-apt-repository -y ppa:george-edison55/cmake-3.x; \
+    sudo apt-get update && sudo apt-get install -y cmake
+
 to get this newer version
 
 ## Used dependencies
@@ -40,18 +40,28 @@ The following dependencies will be automatically downloaded with git while build
 
 ## Building
 Get your terminal in the source tree and run the following commands:
-```sh
-mkdir build
-cd build
-cmake ..
-make
-make install
-```
+
+    mkdir build
+    cd build
+    cmake ..
+    make
+    make install
+
 This will place the Lexesis executable in the `build/bin` folder, with some extra needed data for Lexesis in `build/share`
 You can now simply run `./bin/Lexesis` with the arguments you like (see below and in the man pages for an overview).
 
 ### Running tests
-**TODO**
+First, build Lexesis in debug mode. The only difference with the normal building, is the line where you call cmake. That line should read
+
+    cmake .. -DCMAKE_BUILD_TYPE=Debug
+
+instead. Afterwards, build all the examples as well, since they are used to test the functionality of the generated lexers.
+
+If everything is correctly built, the only thing that remains is to call
+
+    python3 run_tests.py
+
+in the project root, and watch the results.
 
 ## Getting started