chore: add code coverage to ci

.github/workflows/ci.yml

@@ -21,4 +21,14 @@ jobs:
         run: deno lint
 
       - name: test
-        run: deno task test
+        run: deno task test:coverage
+
+      - name: generate lcov
+        run: deno task coverage --lcov --output=cov.lcov
+
+      - name: upload coverage
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          slug: oakserver/commons
+          files: ./cov.lcov

.gitignore

@@ -0,0 +1,2 @@
+cov
+cov.lcov

README.md

@@ -4,6 +4,9 @@
 [![jsr.io/@oak/commons score](https://jsr.io/badges/@oak/commons/score)](https://jsr.io/@oak/commons)
 [![deno.land/x/oak_commons](https://deno.land/badge/oak_commons/version)](https://deno.land/x/oak_commons)
 
+[![ci](https://github.com/oakserver/commons/workflows/ci/badge.svg)](https://github.com/oakserver/commons)
+[![codecov](https://codecov.io/gh/oakserver/commons/graph/badge.svg?token=zImXfOXhO2)](https://codecov.io/gh/oakserver/commons)
+
 A set of APIs that are common to HTTP/HTTPS servers.
 
 > [!NOTE]

deno.json

@@ -23,7 +23,9 @@
   },
   "tasks": {
     "bench": "deno bench --allow-read",
-    "test": "deno test --allow-read"
+    "coverage": "deno coverage --output=cov.lcov --lcov ./cov",
+    "test": "deno test --allow-read",
+    "test:coverage": "deno test --allow-read --coverage=./cov"
   },
   "lock": false,
   "fmt": {