Monocart

coverage-builder.js

@@ -0,0 +1,52 @@
+import fs from 'fs';
+import path from 'path';
+import EC from 'eight-colors';
+
+/**
+ * Create a coverage config from threshold information.
+ * 
+ * @param params.bytes minimum number of bytes to pass
+ * @param params.statements minimum number of statements to pass
+ * @param params.branches minimum number of branches to pass
+ * @param params.functions minimum number of functions to pass
+ * @param params.lines minimum number of lines to pass
+ * @return config for coverage
+ */
+const coverageBuilder = (thresholds) => {
+  const allDirs = ['src', 'lib', 'build/src', 'ts_build/src', 'ecdsa', 'ecies'];
+  const dirs = allDirs.filter(dir => fs.existsSync(dir));
+
+  return {
+    reports: ['console-summary', 'v8', 'v8-json'],
+    outputDir: 'coverage',
+    entryFilter: (entry) => {
+      const fileName = entry.url.slice('file://'.length);
+      for (const dir of dirs) {
+        if (fileName.startsWith(path.join(process.cwd(), dir))
+          && fileName.endsWith('.js')) return true;
+      }
+      return false;
+    },
+    onEnd: (coverageResults) => {
+      const errors = [];
+      const { summary } = coverageResults;
+
+      for (const k of Object.keys(thresholds)) {
+        const pct = summary[k].pct;
+        if (pct < thresholds[k]) {
+          errors.push(`${k[0].toUpperCase() + k.slice(1)} ${pct}% less than ${thresholds[k]}%`);
+        }
+      }
+      console.log(`See ${process.cwd()}/coverage/index.html for details on each file`);
+      console.log('Thresholds: ' + Object.keys(thresholds).map(key => `${key[0].toUpperCase() + key.slice(1)}: ${thresholds[key]}%`).join(' '));
+      if (errors.length) {
+        const errMsg = errors.join('\n');
+        console.log(EC.red(errMsg));
+        process.exit(1);
+      }
+      console.log(EC.green('Sufficient Coverage'));
+    }
+  };
+};
+
+export default coverageBuilder;