tests/components/crate-sidebar: Use the native array method [0]

This fixes the following deprecations:
- The `firstObject` method on the class ManyArray is deprecated.

Author: eth3lbert

tests/components/crate-sidebar/playground-button-test.js

@@ -33,7 +33,7 @@ module('Component | CrateSidebar | Playground Button', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     await render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);
@@ -46,7 +46,7 @@ module('Component | CrateSidebar | Playground Button', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     let expectedHref =
@@ -65,7 +65,7 @@ module('Component | CrateSidebar | Playground Button', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);
@@ -84,7 +84,7 @@ module('Component | CrateSidebar | Playground Button', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     await render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);

tests/components/crate-sidebar/toml-snippet-test.js

@@ -17,7 +17,7 @@ module('Component | CrateSidebar | toml snippet', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     await render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);
@@ -35,7 +35,7 @@ module('Component | CrateSidebar | toml snippet', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     await render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);
@@ -48,7 +48,7 @@ module('Component | CrateSidebar | toml snippet', function (hooks) {
 
     let store = this.owner.lookup('service:store');
     this.crate = await store.findRecord('crate', crate.name);
-    this.version = (await this.crate.versions).firstObject;
+    this.version = (await this.crate.versions).slice()[0];
     await this.crate.loadOwnersTask.perform();
 
     await render(hbs`<CrateSidebar @crate={{this.crate}} @version={{this.version}} />`);