Enable jest coverage (#1352)

abetomo · web-flow · commit ce3aebe1a0ee · 2020-09-10T08:09:09.000+09:00
* Enable jest coverage

* Add `coverage/` to .gitignore

The directory created by the test coverage check.
diff --git a/.gitignore b/.gitignore
@@ -3,3 +3,4 @@ node_modules
 *.sock
 .idea
 .vscode/
+coverage/
diff --git a/package.json b/package.json
@@ -42,6 +42,9 @@
     "typescript": "^3.9.7"
   },
   "typings": "typings/index.d.ts",
+  "jest": {
+    "collectCoverage": true
+  },
   "engines": {
     "node": ">= 6"
   }
