Add context argument assertions to the find and findAll helpers

addon-test-support/@ember/test-helpers/dom/find-all.js

@@ -14,5 +14,9 @@ export default function find(selector) {
     throw new Error('Must pass a selector to `findAll`.');
   }
 
+  if (arguments.length > 1) {
+    throw new Error('The `findAll` test helper only takes a single argument.');
+  }
+
   return toArray(getElements(selector));
 }

addon-test-support/@ember/test-helpers/dom/find.js

@@ -13,5 +13,9 @@ export default function find(selector) {
     throw new Error('Must pass a selector to `find`.');
   }
 
+  if (arguments.length > 1) {
+    throw new Error('The `find` test helper only takes a single argument.');
+  }
+
   return getElement(selector);
 }

tests/unit/dom/find-all-test.js

@@ -63,4 +63,10 @@ module('DOM Helper: findAll', function(hooks) {
       findAll('#foo');
     }, /Must setup rendering context before attempting to interact with elements/);
   });
+
+  test('throws if context argument is passed in', function(assert) {
+    assert.throws(() => {
+      findAll('#foo', document.querySelector('#ember-testing'));
+    }, /The `findAll` test helper only takes a single argument./);
+  });
 });

tests/unit/dom/find-test.js

@@ -49,4 +49,10 @@ module('DOM Helper: find', function(hooks) {
       find('#foo');
     }, /Must setup rendering context before attempting to interact with elements/);
   });
+
+  test('throws if context argument is passed in', function(assert) {
+    assert.throws(() => {
+      find('#foo', document.querySelector('#ember-testing'));
+    }, /The `find` test helper only takes a single argument./);
+  });
 });