create coverage.yaml

.github/workflows/building.yaml

@@ -14,7 +14,7 @@ jobs:
            profile: minimal
            toolchain: stable
            override: true
-       - run: rustup component add rustfmt
+           components: rustfmt
        - uses: actions-rs/cargo@v1
          with:
            command: fmt

.github/workflows/coverage.yaml

@@ -0,0 +1,63 @@
+on: [pull_request]
+
+name: Code Coverage
+
+jobs:
+    coverage:
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v2
+
+            - name: Install Rust toolchain
+              uses: actions-rs/toolchain@v1
+              with:
+                profile: minimal
+                toolchain: stable
+                override: true
+                components: llvm-tools-preview
+
+            - name: Install grcov
+              uses: actions-rs/cargo@v1
+              with:
+                command: install
+                args: grcov
+
+            - name: Build project
+            - uses: actions-rs/cargo@v1
+              with:
+                command: build
+              env:
+                RUSTFLAGS: "-C instrument-coverage"
+
+            - name: Run tests for coverage
+              uses: actions-rs/cargo@v1
+              with:
+                command: test
+              env:
+                LLVM_PROFILE_FILE: profile-%p-%m.profraw
+
+            - name: Generate coverage html report
+              run: grcov . -s . --binary-path ./target/debug -t html --branch --ignore-not-existing -o ./coverage/
+
+            - name: Upload coverage html report
+              uses: actions/upload-artifact@v2
+                with:
+                    name: coverage-html-report
+                    path: coverage/
+
+
+            - name: Generate coverage lcov report
+                run: grcov . -s . --binary-path ./target/debug -t md --branch --ignore-not-existing -o coverage.md
+
+            - name: Check coverage percentage
+                run: |
+                    COVERAGE_PERCENTAGE=$(tail -n 1 coverage.md | grep -oP '(\d+(\.\d+)?)(?=%)')
+                    echo "Coverage percentage is $COVERAGE_PERCENTAGE%"
+                    if (( $(echo "$COVERAGE_PERCENTAGE < $COVERAGE_THRESHOLD" | bc -l) )); then
+                    echo "Code coverage is below $COVERAGE_THRESHOLD%. Failing the workflow."
+                    exit 1
+                    fi
+                env:
+                  COVERAGE_THRESHOLD: 90