Divided is into is and force

index.js

@@ -92,4 +92,9 @@ is.emptyString = _is.emptyString;
 
 is.instance = _is.instance;
 
-module.exports = is;
+module.exports = {
+  is,
+  force: {
+    array: require('./src/force-array')
+  }
+};

src/force-array.js

+/**
+ * Returns val if val is array; [val] otherwise
+ *
+ * @param {*} val
+ * @returns {any[]}
+ */
+function forceArray(val) {
+  if (!Array.isArray(val)) {
+    return [val];
+  }
+
+  return val;
+}
+
+module.exports = forceArray;

test/test.js

-const is = require('../index');
+const { is, force } = require('../index');
 
 // console.log([
 //   is.array(['foo', 'bar']),