Add test coverage + clean up build scripts

.gitignore

@@ -1,4 +1,5 @@
 node_modules
+coverage
 test-snapshot/output-actual
 test-snapshot/output-expected/public
 test-snapshot/output-expected/metadata.json

package.json

@@ -24,8 +24,8 @@
   },
   "scripts": {
     "lint": "standard && require-lint --ignore-extra lightgallery --ignore-extra video.js",
-    "unit": "mocha",
-    "test": "npm run lint && mocha"
+    "unit": "istanbul cover node_modules/mocha/bin/_mocha",
+    "test": "npm run lint && npm run unit"
   },
   "dependencies": {
     "async": "^2.5.0",
@@ -53,7 +53,9 @@
     "zen-observable": "^0.6.0"
   },
   "devDependencies": {
+    "gm": "^1.23.0",
     "injectmd": "^1.0.0",
+    "istanbul": "^0.4.5",
     "markdown-toc": "^1.1.0",
     "mocha": "^4.0.1",
     "mock-fs": "^4.4.2",

scripts/cibuild

@@ -3,16 +3,24 @@
 # Fail the build on any error
 set -eou pipefail
 
-echo "--- Run unit tests"
+trap failure ERR
+function failure {
+  echo ""
+  echo "=================================="
+  echo " ✘ Build failed"
+  echo "=================================="
+}
+
+echo "Run unit tests"
 npm test
 
-echo "--- Verify lightgallery dependency is built in"
+echo "Verify lightgallery dependency is built in"
 grep \"lightgallery\" package.json 1>/dev/null
 
-echo "--- Comparing gallery snapshot"
+echo "Comparing gallery snapshot"
 scripts/verify
 
 echo ""
-echo "================"
-echo "Build successful"
-echo "================"
+echo "=================================="
+echo " ✔ Build successful"
+echo "=================================="

scripts/verify

@@ -21,6 +21,8 @@ for expected in output-expected/*.html; do
   diff -ub "${expected}" "${actual}"
 done
 
+echo "HTML pages are identical to snapshot"
+
 # compare media with the snapshot
 IFS=$'\n'; set -f
 for expected in $(find output-expected/media -name "*.jpg"); do
@@ -29,4 +31,4 @@ for expected in $(find output-expected/media -name "*.jpg"); do
 done
 unset IFS; set +f
 
-echo "Output is identical to snapshot"
+echo "Resized media is identical to snapshot"