test: better code coverage reports (#164)

istanbul wanted a `sourceRoot` property to map back the sourceMaps with.
This makes `nyc merge` work.
This means that all code coverage can now be merged into a single report.
Also remove the lower line coverage
and change the process chaining to `&&` so that CI will _always_ fail.

Author: seebees

karma.conf.js

@@ -29,7 +29,7 @@ module.exports = function (config) {
                 options: {
                   configFile: 'tsconfig.module.json',
                   compilerOptions: {
-                    rootDir: './'
+                    sourceRoot: 'modules/'
                   }
                 }
               }

package.json

@@ -14,9 +14,10 @@
     "build": "run-s build-*",
     "mocha": "mocha --require source-map-support/register --require ts-node/register --exclude 'modules/*-+(browser|backend)/test/*test.ts'  modules/**/test/*test.ts",
     "karma": "karma start karma.conf.js",
-    "coverage-browser": "npm run karma && nyc report --lines 70 -t .karma_output --exclude-after-remap false --check-coverage",
-    "coverage-node": "nyc --lines 70 --require ts-node/register --check-coverage --instrument -e .ts --all -n 'modules/**/src/*.ts' -x 'modules/**/test/*.ts' -x 'modules/*-+(browser|backend)/**/*.ts' npm run mocha",
-    "coverage": "run-s coverage-*",
+    "coverage-browser": "npm run karma && nyc report -t .karma_output --check-coverage --extension .ts",
+    "coverage-node": "nyc --require ts-node/register --instrument --extension .ts --all --check-coverage -n 'modules/**/src/*.ts' -x 'modules/**/test/*.ts' -x 'modules/*-+(browser|backend)/**/*.ts' npm run mocha",
+    "coverage": "run-s coverage-* && nyc merge .karma_output .nyc_output/browser.json && nyc report --extension .ts --check-coverage",
+    "report-coverage": "nyc report --extension .ts --check-coverage -r html",
     "test": "npm run lint && npm run build && npm run coverage",
     "integration-browser-decrypt": "npm run build; lerna run build_fixtures --stream --no-prefix -- -- decrypt -v $npm_package_config_localTestVectors --karma",
     "integration-browser-encrypt": "npm run build; lerna run build_fixtures --stream --no-prefix -- -- encrypt -m $npm_package_config_encryptManifestList -k $npm_package_config_encryptKeyManifest -o $npm_package_config_decryptOracle --karma",