Adding more mutually-exclusive fields to the checks

Applying suggestions from code review.

Related to #25

lib/functional-constraints/mutuallyExclusiveFields.js

@@ -8,20 +8,25 @@ const jsonschema = require('jsonschema');
 //   it was harder to read and understand.
 
 const incompatibleFields = [
-  ['children', 'list'],
-  ['dict', 'list'],
-  ['dynamic', 'dict'],
-  ['dynamic', 'choices'],
+  ['children', 'list'], // This is actually a Feature Request (https://github.com/zapier/zapier-platform-cli/issues/115)
+  ['children', 'dict'], // dict is ignored
+  ['children', 'type'], // type is ignored
+  ['children', 'placeholder'], // placeholder is ignored
+  ['children', 'helpText'], // helpText is ignored
+  ['children', 'default'], // default is ignored
+  ['dict', 'list'], // Use only one or the other
+  ['dynamic', 'dict'], // dict is ignored
+  ['dynamic', 'choices'], // choices are ignored
 ];
 
-const collectErrors = (inputFields, path) => {
+const verifyIncompatibilities = (inputFields, path) => {
   const errors = [];
 
   _.each(inputFields, (inputField, index) => {
-    _.each(incompatibleFields, (fieldGroup) => {
-      if (inputField.hasOwnProperty(fieldGroup[0]) && inputField.hasOwnProperty(fieldGroup[1])) {
+    _.each(incompatibleFields, ([firstField, secondField]) => {
+      if (_.has(inputField, firstField) && _.has(inputField, secondField)) {
         errors.push(new jsonschema.ValidationError(
-          `must not contain ${fieldGroup[0]} and ${fieldGroup[1]}, as they're mutually exclusive.`,
+          `must not contain ${firstField} and ${secondField}, as they're mutually exclusive.`,
           inputField,
           '/FieldSchema',
           `instance.${path}.inputFields[${index}]`,
@@ -42,7 +47,7 @@ const mutuallyExclusiveFields = (definition) => {
     if (definition[typeOf]) {
       _.each(definition[typeOf], (actionDef) => {
         if (actionDef.operation && actionDef.operation.inputFields) {
-          errors = errors.concat(collectErrors(actionDef.operation.inputFields, `${typeOf}.${actionDef.key}`));
+          errors = [...errors, ...verifyIncompatibilities(actionDef.operation.inputFields, `${typeOf}.${actionDef.key}`)];
         }
       });
     }