[MM-12333] Convert mocha to jest and move test files adjacent to the …

…files being tested (mattermost#745)

* convert mocha to jest and move test files adjacent to the files being tested

* update Jenkins, add jest-junit and removed update  config

* fix merge conflicts and remove unecessary comment

.eslintrc.json

@@ -3,11 +3,18 @@
     "./node_modules/eslint-config-mattermost/.eslintrc.json",
     "plugin:flowtype/recommended"
   ],
+  "env": {
+    "jest": true
+  },
   "plugins": [
-    "mocha",
     "flowtype"
   ],
-  "rules": {
-    "mocha/no-exclusive-tests": 2
-  }
+  "overrides": [
+    {
+      "files": ["*.test.js"],
+      "env": {
+        "jest": true
+      }
+    }
+  ]
 }

.gitignore

@@ -43,4 +43,7 @@ mattermost-redux-*.tgz
 /flow-typed
 /.flowinstall
 
-.vscode/
+.vscode/
+
+# test coverage
+coverage

build/Jenkinsfile

@@ -29,13 +29,13 @@ pipeline {
 
         stage('Test') {
             steps {
-                sh "npm run test"
+                sh 'make test'
+            }
+            post {
+                always {
+                    junit 'build/test-results.xml'
+                }
             }
-        }
-    }
-    post {
-        always {
-            junit 'build/test-results.xml'
         }
     }
 }