55693: ItemSelectReducer tests

src/app/shared/item-select/item-select.reducer.spec.ts

-import { ItemSelectionSelectAction } from './item-select.actions';
+import {
+  ItemSelectionDeselectAction, ItemSelectionInitialDeselectAction,
+  ItemSelectionInitialSelectAction, ItemSelectionResetAction,
+  ItemSelectionSelectAction, ItemSelectionSwitchAction
+} from './item-select.actions';
+import { itemSelectionReducer } from './item-select.reducer';
+
+const itemId1 = 'id1';
+const itemId2 = 'id2';
 
 class NullAction extends ItemSelectionSelectAction {
   type = null;
@@ -8,6 +16,83 @@ class NullAction extends ItemSelectionSelectAction {
   }
 }
 
-fdescribe('itemSelectionReducer', () => {
+describe('itemSelectionReducer', () => {
+
+  it('should return the current state when no valid actions have been made', () => {
+    const state = {};
+    state[itemId1] = { checked: true };
+    const action = new NullAction();
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState).toEqual(state);
+  });
+
+  it('should start with an empty object', () => {
+    const state = {};
+    const action = new NullAction();
+    const newState = itemSelectionReducer(undefined, action);
+
+    expect(newState).toEqual(state);
+  });
+
+  it('should set checked to true in response to the INITIAL_SELECT action', () => {
+    const action = new ItemSelectionInitialSelectAction(itemId1);
+    const newState = itemSelectionReducer(undefined, action);
+
+    expect(newState[itemId1].checked).toBeTruthy();
+  });
+
+  it('should set checked to true in response to the INITIAL_DESELECT action', () => {
+    const action = new ItemSelectionInitialDeselectAction(itemId1);
+    const newState = itemSelectionReducer(undefined, action);
+
+    expect(newState[itemId1].checked).toBeFalsy();
+  });
+
+  it('should set checked to true in response to the SELECT action', () => {
+    const state = {};
+    state[itemId1] = { checked: false };
+    const action = new ItemSelectionSelectAction(itemId1);
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState[itemId1].checked).toBeTruthy();
+  });
+
+  it('should set checked to false in response to the DESELECT action', () => {
+    const state = {};
+    state[itemId1] = { checked: true };
+    const action = new ItemSelectionDeselectAction(itemId1);
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState[itemId1].checked).toBeFalsy();
+  });
+
+  it('should set checked from false to true in response to the SWITCH action', () => {
+    const state = {};
+    state[itemId1] = { checked: false };
+    const action = new ItemSelectionSwitchAction(itemId1);
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState[itemId1].checked).toBeTruthy();
+  });
+
+  it('should set checked from true to false in response to the SWITCH action', () => {
+    const state = {};
+    state[itemId1] = { checked: true };
+    const action = new ItemSelectionSwitchAction(itemId1);
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState[itemId1].checked).toBeFalsy();
+  });
+
+  it('should set reset the state in response to the RESET action', () => {
+    const state = {};
+    state[itemId1] = { checked: true };
+    state[itemId2] = { checked: false };
+    const action = new ItemSelectionResetAction(undefined);
+    const newState = itemSelectionReducer(state, action);
+
+    expect(newState).toEqual({});
+  });
 
 });