[Improvement] add utils test cases (#380)

test/unit/specs/area.spec.js

@@ -1,7 +1,6 @@
 import Area from 'packages/area';
 import { mount } from 'avoriaz';
 import AreaList from '../mock/area.json';
-import { setTimeout } from 'timers';
 
 describe('Area', () => {
   let wrapper;
@@ -27,8 +26,6 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
-
     const confirmBtn = wrapper.find('.van-picker__confirm')[0];
     const eventStub = sinon.stub(wrapper.vm, '$emit');
 
@@ -49,7 +46,6 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
     expect(wrapper.vm.$refs.picker.getColumnValue(2).code).to.equal('110101');
 
     wrapper.setProps({
@@ -68,9 +64,7 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
     expect(wrapper.vm.areaColumns.length).to.equal(0);
-    
   });
 
   it('create an area with columnsNum equal 2', () => {
@@ -81,7 +75,6 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
     expect(wrapper.vm.areaColumns.length).to.equal(2);
   });
 
@@ -93,7 +86,6 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
     expect(wrapper.vm.areaColumns.length).to.equal(1);
   });
 
@@ -104,7 +96,6 @@ describe('Area', () => {
       }
     });
 
-    expect(wrapper.hasClass('van-area')).to.be.true;
     const cancelBtn = wrapper.find('.van-picker__cancel')[0];
     const eventStub = sinon.stub(wrapper.vm, '$emit');
 
@@ -115,4 +106,23 @@ describe('Area', () => {
       done();
     });
   });
+
+  it('onChange method', () => {
+    wrapper = mount(Area, {
+      propsData: {
+        areaList: AreaList
+      }
+    });
+
+    let list = [];
+    const setColumnValues = (index, arr) => {
+      list = [...list, ...arr];
+    };
+    const code = { code: '110101' };
+
+    wrapper.vm.onChange({ setColumnValues }, [code], 0);
+    wrapper.vm.onChange({ setColumnValues }, [code, code], 1);
+
+    expect(list.length).to.equal(33);
+  });
 });