Adding actions.omit() + unit tests

Author: davidkpiano

src/actions/model-actions.js

@@ -131,6 +131,24 @@ const merge = (model, values) => (dispatch, getState) => {
   });
 };
 
+const omit = (model, props = []) => (dispatch, getState) => {
+  const value = _get(getState(), model, {});
+
+  const propsArray = typeof props === 'string'
+    ? [props]
+    : props;
+
+  const newValue = propsArray.reduce(
+    (acc, prop) => icepick.dissoc(acc, prop),
+    value);
+
+  dispatch({
+    type: actionTypes.CHANGE,
+    model,
+    value: newValue,
+  });
+};
+
 const load = (model, values) => change(model, values, {
   silent: true,
 });
@@ -147,4 +165,5 @@ export default {
   toggle,
   xor,
   load,
+  omit,
 };

test/model-actions-spec.js

@@ -167,6 +167,18 @@ describe('model actions', () => {
           expected: { foo: { bar: 'new', one: 'two', untouched: 'intact' } },
         },
       ],
+      omit: [
+        {
+          init: { one: 1, two: 2, three: 3 },
+          params: ['test', 'two'],
+          expected: { one: 1, three: 3 },
+        },
+        {
+          init: { one: 1, two: 2, three: 3 },
+          params: ['test', ['one', 'three']],
+          expected: { two: 2 },
+        },
+      ],
     };
 
     /* eslint-disable array-callback-return */
@@ -242,4 +254,25 @@ describe('model actions', () => {
       actions.filter('test.items', (n) => n % 2)(dispatch, getState);
     });
   });
+
+  describe('omit()', () => {
+    it('should dissociate props from the form state', (done) => {
+      const initialState = { one: 1, two: 2, three: 3 };
+      const reducer = formReducer('test', initialState);
+
+      assert.property(reducer(undefined, { type: '' }).fields, 'one');
+      assert.property(reducer(undefined, { type: '' }).fields, 'two');
+      assert.property(reducer(undefined, { type: '' }).fields, 'three');
+
+      const dispatch = action => {
+        assert.notProperty(reducer(undefined, action).fields, 'one');
+        assert.notProperty(reducer(undefined, action).fields, 'three');
+        done();
+      };
+
+      const getState = () => ({ test: initialState });
+
+      actions.omit('test', ['one', 'three'])(dispatch, getState);
+    });
+  });
 });