#246: Add second test to CI generator script job

- This is to compare data from master and the branch where the CI job was started from

.github/workflows/ci-build.yml

@@ -229,5 +229,32 @@ jobs:
       - name: Get SQL dump of new dummy data
         run: mysqldump -picatdbuserpw -uicatdbuser --skip-comments icatdb > ~/generator_script_dump_2.sql
 
+      # Tests that the generator script produces consistent data over two separate runs
       - name: Diff SQL dumps
         run: diff -s ~/generator_script_dump_1.sql ~/generator_script_dump_2.sql
+
+
+      # Drop and re-create icatdb to remove generated data
+      - name: Drop icatdb
+        run: mysql -picatdbuserpw -uicatdbuser -e 'DROP DATABASE icatdb;'
+      - name: Create icatdb
+        run: mysql -picatdbuserpw -uicatdbuser -e 'CREATE DATABASE icatdb;'
+      # Regenerate table structure of icatdb
+      - name: Reinstall ICAT Server
+        run: cd /home/runner/install/icat.server; ./setup -vv install
+
+      - name: Checkout DataGateway API (master)
+        uses: actions/checkout@v2
+        with:
+          ref: master
+
+      - name: Is API on master?
+        run: pwd; git status
+      - name: Add dummy data to icatdb
+        run: pwd; poetry run python -m util.icat_db_generator
+      - name: Get SQL dump of dummy data from master's generator script
+        run: mysqldump -picatdbuserpw -uicatdbuser --skip-comments icatdb > ~/generator_script_dump_master.sql
+
+      # Tests that the generator script produces the same data as is produced with master's version
+      - name: Diff SQL dumps
+        run: diff -s ~/generator_script_dump_master.sql ~/generator_script_dump_1.sql