ci: add code coverage

.github/workflows/build_test.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  fmt:
+  fmt-lint-build-test:
     runs-on: ubuntu-latest
     env:
         DATABASE_URL: sqlite://${{ github.workspace }}/examples/universe.db
@@ -22,7 +22,15 @@ jobs:
       - name: Test dev
         run: cargo test
       - name: Build release
-        run: cargo build
+        run: cargo build --release
       - name: Test release
-        run: cargo test
-
+        run: cargo test --release
+      - name: Install code coverage tool
+        run: cargo install cargo-tarpaulin
+      - name: Generate code coverage
+        run: cargo tarpaulin --out Html
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v1
+        with:
+          name: code-coverage-report
+          path: tarpaulin-report.html

.gitignore

@@ -1,3 +1,4 @@
 target
 old
 .cargo
+tarpaulin-report.html

Readme.md

@@ -47,7 +47,6 @@ Contains code to connect and read from the DB, process the CLI input and definin
 
 ## TODO
 
-- coverage is missing
 - bulding the docker image
 - pushing to dockerhub with a dev tag
 - release-please