Support schema and meta keywords (#84)

* Adds support for $schema keyword

* Support for meta keyword

* Adds unit test

Author: Bradley Marques

src/formBuilder/FormBuilder.test.js

@@ -212,4 +212,55 @@ describe('FormBuilder', () => {
     expect(cardInputs.at(1).props().value).toEqual('Custom Title');
     expect(cardInputs.at(2).props().value).toEqual('Custom Description');
   });
+
+  it('supports the $schema keyword and there is no error', () => {
+    const jsonSchema = {
+      $schema: 'http://json-schema.org/draft-07/schema#',
+    };
+
+    const props = {
+      schema: JSON.stringify(jsonSchema),
+      uiSchema: '{}',
+      onChange: jest.fn(() => {}),
+      mods: {},
+      className: 'my-form-builder',
+    };
+
+    const div = document.createElement('div');
+    document.body.appendChild(div);
+    const wrapper = mount(<FormBuilder {...props} />, { attachTo: div });
+    const errors = wrapper
+      .find('.alert-warning')
+      .first()
+      .find('li')
+      .map((error) => error.text());
+    expect(errors).toEqual([]);
+  });
+
+  it('supports the meta keyword and there is no error', () => {
+    const jsonSchema = {
+      $schema: 'http://json-schema.org/draft-07/schema#',
+      meta: {
+        some: 'meta information',
+      },
+    };
+
+    const props = {
+      schema: JSON.stringify(jsonSchema),
+      uiSchema: '{}',
+      onChange: jest.fn(() => {}),
+      mods: {},
+      className: 'my-form-builder',
+    };
+
+    const div = document.createElement('div');
+    document.body.appendChild(div);
+    const wrapper = mount(<FormBuilder {...props} />, { attachTo: div });
+    const errors = wrapper
+      .find('.alert-warning')
+      .first()
+      .find('li')
+      .map((error) => error.text());
+    expect(errors).toEqual([]);
+  });
 });

src/formBuilder/utils.js

@@ -130,6 +130,8 @@ const supportedPropertyParameters = new Set([
   'enumNames',
   'dependencies',
   '$id',
+  '$schema',
+  'meta',
 ]);
 
 const supportedUiParameters = new Set([

src/formBuilder/utils.test.js

@@ -76,8 +76,8 @@ describe('parse', () => {
         `
     {
       "key": {
-        "array": ["item1", "item2"], 
-        "name": "obj1", 
+        "array": ["item1", "item2"],
+        "name": "obj1",
         "num": 0
       }
     }`,
@@ -240,6 +240,24 @@ describe('checkForUnsupportedFeatures', () => {
     ).toEqual([]);
   });
 
+  it('gives no warnings for the inclusion of $schema and meta keywords', () => {
+    let testSchema = {
+      type: 'object',
+      $schema: 'http://json-schema.org/draft-07/schema#',
+      meta: {
+        some: 'meta information',
+      },
+    };
+    let testUischema = {};
+    expect(
+      checkForUnsupportedFeatures(
+        testSchema,
+        testUischema,
+        DEFAULT_FORM_INPUTS,
+      ),
+    ).toEqual([]);
+  });
+
   it('gives warnings for unknown features in schema', () => {
     let testSchema = {
       type: 'object',