Implemented unit testing in gitlab CI/CD pipeline

Contributors: If you run unit tests locally, you will need to import Server/db_exports/testuser.sql to set up the unit test user in your local database server (or change the credentials used for unit testing in Server/src/test/resources/test.conf)

.gitlab-ci.yml

@@ -13,7 +13,8 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
 
 before_script:
-  - free -mh
+  - 'free -mh'
+  - 'apt-get update -q'
 
 # Cache downloaded dependencies and plugins between builds.
 # To keep cache across branches add 'key: "$CI_JOB_NAME"'
@@ -24,8 +25,13 @@ cache:
 verify:jdk11:
   stage: build
   script:
+    - 'apt-get install -q -y --no-install-recommends mariadb-server'
+    - 'mysqld_safe &'
+    - 'sleep 3'
+    - 'mysql -u root < Server/db_exports/global.sql'
+    - 'mysql -u root < Server/db_exports/testuser.sql'
     - 'cd Server'
-    - 'mvn $MAVEN_CLI_OPTS verify -DskipTests'
+    - 'mvn $MAVEN_CLI_OPTS verify'
   except:
     variables:
       - $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
@@ -33,7 +39,7 @@ verify:jdk11:
 test:json:
   stage: test
   script:
-    - apt-get update -qq && apt-get install -qq -y --no-install-recommends jq
+    - 'apt-get install -q -y --no-install-recommends jq'
     - 'find . -name \*.json -type f -print0 | xargs -0 -n1 -P8 jq empty'
   except:
     variables: