From 7f3b65ff9832916fbcbf30f1e259bd288acc376f Mon Sep 17 00:00:00 2001
From: Robert Jackson <rjackson@linkedin.com>
Date: Wed, 6 Oct 2021 17:49:59 -0400
Subject: [PATCH] Ensure `ember-classic` ember-try scenario uses Ember 3.x

As we approach Ember 4.0.0, we need to help addons ensure that they only
test ember-classic's set of optional features when running under 3.x.

This updates the default ember-try config to hard code the
`ember-classic` scenario to Ember 3.28 (the last 3.x Ember version).
---
 blueprints/addon/files/addon-config/ember-try.js  | 5 +++++
 tests/fixtures/addon/defaults/config/ember-try.js | 5 +++++
 tests/fixtures/addon/yarn/config/ember-try.js     | 3 +++
 3 files changed, 13 insertions(+)

diff --git a/blueprints/addon/files/addon-config/ember-try.js b/blueprints/addon/files/addon-config/ember-try.js
index 885aa9a250a..325f0f04442 100644
--- a/blueprints/addon/files/addon-config/ember-try.js
+++ b/blueprints/addon/files/addon-config/ember-try.js
@@ -62,6 +62,11 @@ module.exports = async function () {
       },
       {
         name: 'ember-classic',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.28.0',
+          },
+        },
         env: {
           EMBER_OPTIONAL_FEATURES: JSON.stringify({
             'application-template-wrapper': true,
diff --git a/tests/fixtures/addon/defaults/config/ember-try.js b/tests/fixtures/addon/defaults/config/ember-try.js
index e6ef3ad925c..0b9f6d2e211 100644
--- a/tests/fixtures/addon/defaults/config/ember-try.js
+++ b/tests/fixtures/addon/defaults/config/ember-try.js
@@ -61,6 +61,11 @@ module.exports = async function () {
       },
       {
         name: 'ember-classic',
+        npm: {
+          devDependencies: {
+            'ember-source': '~3.28.0',
+          },
+        },
         env: {
           EMBER_OPTIONAL_FEATURES: JSON.stringify({
             'application-template-wrapper': true,
diff --git a/tests/fixtures/addon/yarn/config/ember-try.js b/tests/fixtures/addon/yarn/config/ember-try.js
index d8bd6f97de3..c9d0dd79318 100644
--- a/tests/fixtures/addon/yarn/config/ember-try.js
+++ b/tests/fixtures/addon/yarn/config/ember-try.js
@@ -70,6 +70,9 @@ module.exports = async function () {
           }),
         },
         npm: {
+          devDependencies: {
+            'ember-source': '~3.28.0',
+          },
           ember: {
             edition: 'classic',
           },