Enable test coverage reports

.gitignore

@@ -15,3 +15,4 @@ reagent.iml
 node_modules
 junit
 .shadow-cljs
+coverage/

circle.yml

@@ -23,6 +23,9 @@ jobs:
           paths:
             - node_modules
           key: reagent-npm-{{ checksum "package.json" }}
+      - store_artifacts:
+          path: coverage
+      - run: bash <(curl -s https://codecov.io/bash)
 
     environment:
       NPM_CONFIG_LOGLEVEL: warn

package.json

@@ -11,10 +11,12 @@
   },
   "devDependencies": {
     "gzip-size-cli": "3.0.0",
-    "karma": "3.1.1",
-    "karma-chrome-launcher": "2.2.0",
+    "karma": "4.4.1",
+    "karma-chrome-launcher": "3.1.0",
     "karma-cljs-test": "0.1.0",
-    "karma-junit-reporter": "1.2.0",
+    "karma-coverage": "https://github.com/karma-runner/karma-coverage.git#55aeead0934a39efbd9db0b575d416ab44cd8a12",
+    "karma-junit-reporter": "2.0.1",
+    "karma-sourcemap-loader": "^0.3.7",
     "md5-file": "4.0.0",
     "shadow-cljs": "2.8.83"
   }

test-environments/browser-cljsjs/test.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 set -ex
 rm -rf target/cljsbuild/test/
-lein doo chrome-headless test once
+COVERAGE=1 lein doo chrome-headless test once
 test -f target/cljsbuild/test/out/cljsjs/react/development/react.inc.js

test/runners/karma.conf.js

@@ -24,5 +24,23 @@ module.exports = function(config) {
     useBrowserName: false // add browser name to report and classes names
   };
 
+  if (process.env.COVERAGE) {
+    configData.reporters = ['dots', 'junit', 'coverage'];
+
+    configData.preprocessors = {
+      'target/cljsbuild/test/out/reagent/**/!(*_test).js': ['sourcemap', 'coverage'],
+    };
+
+    configData.coverageReporter = {
+      reporters: [
+        {type: 'html'},
+        {type: 'lcovonly'},
+      ],
+      dir: 'coverage',
+      subdir: '.',
+      includeAllSources: true,
+    };
+  }
+
   config.set(configData);
 };