add reducer action SET_OPTIONS

src/reducers/stateReducer.js

@@ -5,6 +5,8 @@ import { addEpoch, setEpoch, removeEpoch } from './stateReducer.epochs';
 import type { epochAction } from './stateReducer.epochs';
 import { addFeature } from './stateReducer.features';
 import type { featureAction } from './stateReducer.features';
+import type { optionsAction } from './stateReducer.options';
+import { setOptions } from './stateReducer.options';
 import { run } from './stateReducer.results';
 import type { resultsAction } from './stateReducer.results'
 import { initState } from './stateReducer.init';
@@ -53,6 +55,8 @@ export const stateReducer = (state: stateType, action: actionType): stateType =>
 
     case 'ADD_FEATURE': return addFeature(state, action);
 
+    case 'SET_OPTIONS': return setOptions(state, action);
+
     case 'RUN': return run(state, action);
 
     default: return state;

src/reducers/stateReducer.options.js

@@ -0,0 +1,20 @@
+// @flow
+import type { stateType } from './stateReducer';
+
+export type optionAction = {
+  type: 'SET_OPTIONS',
+  value: {
+    option: string,
+    setValue: string
+  }
+};
+
+export const setOptions = (state: stateType, action: optionAction): stateType => {
+  const option = action.value.option;
+  let value = action.value.setValue;
+  if (value === 'true') value = true;
+  if (value === 'false') value = false;
+  const mutatedState = {...state};
+  mutatedState.options[option] = value;
+  return mutatedState;
+}

src/reducers/stateReducer.options.test.js

@@ -0,0 +1,38 @@
+import { stateReducer } from './stateReducer';
+import { initState } from './stateReducer.init';
+
+describe('Options', () => {
+  let state = {}
+  beforeEach(() => {
+    state = initState();
+  });
+
+  it('Options returned unaltered', () => {
+    const action = {type: ''};
+    expect(stateReducer(state, action)).toBe(state);
+  });
+
+  // output: 'default', save: false
+  it('Options change to output returns with changed value', () => {
+    const action = {type: 'SET_OPTIONS', value: {option: 'output', setValue: 'proto'}};
+    expect(stateReducer(state, action)).toEqual(
+      {...state, 
+        options: {...state.options, 
+          output: 'proto'
+        }
+      }
+    );
+  });
+  
+  it('Options change to save returns with changed value', () => {
+    const action = {type: 'SET_OPTIONS', value: {option: 'save', setValue: 'true'}};
+    expect(stateReducer(state, action)).toEqual(
+      {...state, 
+        options: {...state.options, 
+          save: true
+        }
+      }
+    );
+  });
+
+});