<div class="row ng-scope" ng-repeat="post in posts">
    <div class="col-md-7">
        <h4 class="ng-binding">Topic - ABC</h4>
        <div class="text-right">
            <button class="btn btn-none btn-sm" ng-click="posts.newPost()">
                Create Post
            </button>
        </div>
    </div>
 </div>
<div class="row ng-scope" ng-repeat="post in posts">
    <div class="col-md-7">
        <h4 class="ng-binding">Topic - XYZ</h4>
        <div class="text-right">
            <button class="btn btn-none btn-sm" ng-click="posts.newPost()">
                Create Post
            </button>
       </div>
    </div>
 </div>
<div class="row ng-scope" ng-repeat="post in posts">
    <div class="col-md-7">
        <h4 class="ng-binding">Topic - EFG</h4>
        <div class="text-right">
            <button class="btn btn-none btn-sm" ng-click="posts.newPost()">
                Create Post
            </button>
        </div>
     </div>
</div>

var button = $$(by.repeater('post in posts')).get(1).$(by.css('[ng-click="posts.newPost()"]'))

button.click(); // click is not showing up

var button = element.all(by.repeater('post in posts')).get(1).$('[ng-click*=newPost]');
button.click();

var button = element.all(by.repeater('post in posts')).filter(function (post) {
    return post.$("h4").getText().then(function (postTitle) {
        return postTitle === "Topic - XYZ";
    });
}).get(1).$('[ng-click*=newPost]');
button.click();

var post = element.all(by.repeater('post in posts')).get(1);

var button = post.element(by.buttonText("Create Post"));
button.click();