From 605a90ce36329d2c480efee3c08ee17fad1f4809 Mon Sep 17 00:00:00 2001
From: Steve Howell <showell@zulipchat.com>
Date: Tue, 24 Apr 2018 12:28:24 +0000
Subject: [PATCH] node tests: Reach 100% coverage for scroll_util.js.

---
 frontend_tests/node_tests/scroll_util.js | 38 ++++++++++++++++++++++++
 tools/test-js-with-node                  |  1 +
 2 files changed, 39 insertions(+)

diff --git a/frontend_tests/node_tests/scroll_util.js b/frontend_tests/node_tests/scroll_util.js
index a09c9c6497..b3d2e79b8b 100644
--- a/frontend_tests/node_tests/scroll_util.js
+++ b/frontend_tests/node_tests/scroll_util.js
@@ -53,3 +53,41 @@ zrequire('scroll_util');
     }));
 
 }());
+
+(function test_scroll_element_into_container() {
+    const container = (function () {
+        var top = 3;
+        return {
+            height: () => 100,
+            scrollTop: (arg) => {
+                if (arg === undefined) {
+                    return top;
+                }
+                top = arg;
+            },
+        };
+    }());
+
+    const elem1 = {
+        height: () => 25,
+        position: () => {
+            return {
+                top: 0,
+            };
+        },
+    };
+    scroll_util.scroll_element_into_container(elem1, container);
+    assert.equal(container.scrollTop(), 3);
+
+    const elem2 = {
+        height: () => 15,
+        position: () => {
+            return {
+                top: 250,
+            };
+        },
+    };
+    scroll_util.scroll_element_into_container(elem2, container);
+    assert.equal(container.scrollTop(), 250 - 100 + 3 + 15);
+}());
+
diff --git a/tools/test-js-with-node b/tools/test-js-with-node
index c25f101ed5..95d8bc4522 100755
--- a/tools/test-js-with-node
+++ b/tools/test-js-with-node
@@ -54,6 +54,7 @@ enforce_fully_covered = {
     'static/js/reactions.js',
     'static/js/recent_senders.js',
     'static/js/rtl.js',
+    'static/js/scroll_util.js',
     'static/js/search_suggestion.js',
     # Removed because we're migrating code from uncovered other settings pages to here.
     # 'static/js/settings_ui.js',