build(tests): ajoute un rapport de couverture de tests

.gitignore

@@ -5,3 +5,4 @@ node_modules/
 /src/tools/sources/**/*.json
 /dist
 /sources
+/coverage

jest.config.js

@@ -18,13 +18,13 @@ module.exports = {
   clearMocks: true,
 
   // Indicates whether the coverage information should be collected while executing the test
-  // collectCoverage: false,
+  collectCoverage: true,
 
   // An array of glob patterns indicating a set of files for which coverage information should be collected
   // collectCoverageFrom: null,
 
   // The directory where Jest should output its coverage files
-  coverageDirectory: 'coverage',
+  coverageDirectory: '../coverage',
 
   // An array of regexp pattern strings used to skip coverage collection
   // coveragePathIgnorePatterns: [