How to get ion-checkbox multiple select value in Ionic 3

Question

    <div *ngIf="testList.length > 0">
  <ion-item *ngFor="let member of testList">
    <ion-label>{{member?.testName || 'N/A'}}</ion-label>
    <ion-checkbox color="dark" [(ngModel)]="member.checked"></ion-checkbox>
  </ion-item>
</div>

[{testID: 1, testName: " test1", testAmount: "500", testDescription: ""},
{testID: 2, testName: " test2", testAmount: "500", testDescription: ""},
{testID: 3, testName: "dgdfgd", testAmount: "150", testDescription: ""},
{testID: 4, testName: "UricAcid", testAmount: "200", testDescription: ""}]

<button (click)="gettstdata()">Done</button>

How to get all checkbox value like multi select when click on Done button

Answer 1

<div *ngIf="testList.length > 0">
  <ion-item *ngFor="let member of testList">
    <ion-label>{{member?.testName || 'N/A'}}</ion-label>
    <ion-checkbox color="dark" (click)="selectMember(member)" [(ngModel)]="member.checked"></ion-checkbox>
  </ion-item>
</div>
<button ion-button (click)="checkAll()">Done</button>

in ts:

  testList: any = [
       {testID: 1, testName: " test1", checked: false},
       {testID: 2, testName: " test2", checked: false},
       {testID: 3, testName: "dgdfgd", checked: false},
       {testID: 4, testName: "UricAcid", checked: false}
    ]

selectedArray :any = [];

checkAll(){
  for(let i =0; i <= this.testList.length; i++) {
    this.testList[i].checked = true;
  }
 console.log(this.testList);
}

selectMember(data){
 if (data.checked == true) {
    this.selectedArray.push(data);
  } else {
   let newArray = this.selectedArray.filter(function(el) {
     return el.testID !== data.testID;
  });
   this.selectedArray = newArray;
 }
 console.log(this.selectedArray);
}