- WIP: implement data pre-processor for #101

- implement checks for #101
- add some specs

www/dependency-validator.js

@@ -0,0 +1,22 @@
+module.exports = function init(FormData, console, messages) {
+  var interface = {
+    checkFormDataApi: checkFormDataApi,
+    logWarnings: logWarnings,
+  };
+
+  return interface;
+
+  function logWarnings() {
+    if (!FormData) {
+      console.warn(messages.MISSING_FORMDATA_API);
+    } else if (!FormData.prototype || !FormData.prototype.entries) {
+      console.warn(messages.MISSING_FORMDATA_ENTRIES_API);
+    }
+  }
+
+  function checkFormDataApi() {
+    if (!FormData || !FormData.prototype || !FormData.prototype.entries) {
+      throw new Error(messages.MISSING_FORMDATA_ENTRIES_API);
+    }
+  }
+};