add tag-drop component test

test/javascripts/components/tag-drop-test.js.es6

@@ -0,0 +1,71 @@
+import componentTest from "helpers/component-test";
+
+moduleForComponent("tag-drop", {
+  integration: true,
+  beforeEach: function() {
+    this.set("subject", selectKit());
+  }
+});
+
+componentTest("default", {
+  template: "{{tag-drop}}",
+
+  beforeEach() {
+    this.site.set("can_create_tag", true);
+    this.set("site.top_tags", ["jeff", "neil", "arpit", "régis"]);
+
+    const response = object => {
+      return [200, { "Content-Type": "application/json" }, object];
+    };
+
+    // prettier-ignore
+    server.get("/tags/filter/search", (params) => { //eslint-disable-line
+      if (params.queryParams.q === "rég") {
+        return response({
+          "results": [
+            { "id": "régis", "name": "régis", "count": 2, "pm_count": 0 }
+          ]
+        });
+      }
+    });
+  },
+
+  async test(assert) {
+    await this.get("subject").expand();
+
+    assert.equal(
+      this.get("subject")
+        .rowByIndex(0)
+        .name(),
+      "jeff",
+      "it has the correct tag"
+    );
+
+    assert.equal(
+      this.get("subject")
+        .rowByIndex(1)
+        .name(),
+      "neil",
+      "it has the correct tag"
+    );
+
+    await this.get("subject").fillInFilter("rég");
+    assert.equal(
+      this.get("subject")
+        .rowByIndex(0)
+        .name(),
+      "régis",
+      "it displays the searched tag"
+    );
+
+    await this.get("subject").fillInFilter("");
+    assert.equal(
+      this.get("subject")
+        .rowByIndex(0)
+        .name(),
+      "jeff",
+      "it returns top tags for an empty search"
+    );
+
+  }
+});