Add scripts to collect ts test coverage

.gitignore

@@ -18,3 +18,4 @@ packages/_generated/src
 !.yarn/releases
 !.yarn/sdks
 !.yarn/versions
+coverage

Makefile

@@ -53,6 +53,9 @@ playground-test:
 playground-test-watch:
 	yarn workspace playground run test:watch
 
+playground-test-coverage:
+	yarn workspace playground run test:coverage
+
 playground-bundlesize:
 	yarn workspace playground run bundlesize
 
@@ -69,6 +72,9 @@ components-test:
 components-test-watch:
 	yarn workspace @paritytech/components run test:watch
 
+components-test-coverage:
+	yarn workspace @paritytech/components run test:coverage
+
 ################################################################################
 # ENTRYPOINT: crate-extractor
 ################################################################################

packages/components/package.json

@@ -7,7 +7,8 @@
     "clean": "rimraf dist pkg node_modules",
     "test": "jest --update-snapshot",
     "test:watch": "jest --update-snapshot --watch",
-    "test:clear": "jest --clearCache"
+    "test:clear": "jest --clearCache",
+    "test:coverage": "jest --update-snapshot --collectCoverage"
   },
   "author": "",
   "license": "ISC",

packages/playground/package.json

@@ -16,6 +16,7 @@
     "test": "jest --update-snapshot",
     "test:watch": "jest --update-snapshot --watch",
     "test:clear": "jest --clearCache",
+    "test:coverage": "jest --update-snapshot --collectCoverage",
     "bundlesize": "yarn bundlesize:generate && webpack-bundle-analyzer --port 8081 bundle-size-stats.json dist",
     "bundlesize:generate": "yarn build && yarn webpack --stats --json=bundle-size-stats.json"
   },