1 files changed, 146 insertions, 0 deletions
diff --git a/browser/base/content/test/newtab/browser_newtab_bug1194895.js b/browser/base/content/test/newtab/browser_newtab_bug1194895.js
new file mode 100644
index 000000000..c08b23185
--- /dev/null
+++ b/browser/base/content/test/newtab/browser_newtab_bug1194895.js
@@ -0,0 +1,146 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const PRELOAD_PREF = "browser.newtab.preload";
+const PREF_NEWTAB_COLUMNS = "browser.newtabpage.columns";
+const PREF_NEWTAB_ROWS = "browser.newtabpage.rows";
+
+function populateDirectoryTiles() {
+  let directoryTiles = [];
+  let i = 0;
+  while (i++ < 14) {
+    directoryTiles.push({
+      directoryId: i,
+      url: "http://example" + i + ".com/",
+      enhancedImageURI: "data:image/png;base64,helloWORLD",
+      title: "dirtitle" + i,
+      type: "affiliate"
+    });
+  }
+  return directoryTiles;
+}
+
+gDirectorySource = "data:application/json," + JSON.stringify({
+  "directory": populateDirectoryTiles()
+});
+
+
+add_task(function* () {
+  requestLongerTimeout(4);
+  let origEnhanced = NewTabUtils.allPages.enhanced;
+  let origCompareLinks = NewTabUtils.links.compareLinks;
+  registerCleanupFunction(() => {
+    NewTabUtils.allPages.enhanced = origEnhanced;
+    NewTabUtils.links.compareLinks = origCompareLinks;
+  });
+
+  // turn off preload to ensure grid updates on every setLinks
+  yield pushPrefs([PRELOAD_PREF, false]);
+  // set newtab to have three columns only
+  yield pushPrefs([PREF_NEWTAB_COLUMNS, 3]);
+  yield pushPrefs([PREF_NEWTAB_ROWS, 5]);
+
+  yield* addNewTabPageTab();
+  yield customizeNewTabPage("enhanced"); // Toggle enhanced off
+
+  // Testing history tiles
+
+  // two rows of tiles should always fit on any screen
+  yield setLinks("0,1,2,3,4,5");
+  yield* addNewTabPageTab();
+
+  // should do not see scrollbar since tiles fit into visible space
+  yield* checkGrid("0,1,2,3,4,5");
+  let scrolling = yield hasScrollbar();
+  ok(!scrolling, "no scrollbar");
+
+  // add enough tiles to cause extra two rows and observe scrollbar
+  yield setLinks("0,1,2,3,4,5,6,7,8,9");
+  yield* addNewTabPageTab();
+  yield* checkGrid("0,1,2,3,4,5,6,7,8,9");
+  scrolling = yield hasScrollbar();
+  ok(scrolling, "document has scrollbar");
+
+  // pin the last tile to make it stay at the bottom of the newtab
+  yield pinCell(9);
+  // block first 6 tiles, which should not remove the scroll bar
+  // since the last tile is pinned in the nineth position
+  for (let i = 0; i < 6; i++) {
+    yield blockCell(0);
+  }
+  yield* addNewTabPageTab();
+  yield* checkGrid("6,7,8,,,,,,,9p");
+  scrolling = yield hasScrollbar();
+  ok(scrolling, "document has scrollbar when tile is pinned to the last row");
+
+  // unpin the site: this will move tile up and make scrollbar disappear
+  yield unpinCell(9);
+  yield* addNewTabPageTab();
+  yield* checkGrid("6,7,8,9");
+  scrolling = yield hasScrollbar();
+  ok(!scrolling, "no scrollbar when bottom row tile is unpinned");
+
+  // reset everything to clean slate
+  NewTabUtils.restore();
+
+  // Testing directory tiles
+  yield customizeNewTabPage("enhanced"); // Toggle enhanced on
+
+  // setup page with no history tiles to test directory only display
+  yield setLinks([]);
+  yield* addNewTabPageTab();
+  ok(!scrolling, "no scrollbar for directory tiles");
+
+  // introduce one history tile - it should occupy the last
+  // available slot at the bottom of newtab and cause scrollbar
+  yield setLinks("41");
+  yield* addNewTabPageTab();
+  scrolling = yield hasScrollbar();
+  ok(scrolling, "adding low frecency history site causes scrollbar");
+
+  // set PREF_NEWTAB_ROWS to 4, that should clip off the history tile
+  // and remove scroll bar
+  yield pushPrefs([PREF_NEWTAB_ROWS, 4]);
+  yield* addNewTabPageTab();
+
+  scrolling = yield hasScrollbar();
+  ok(!scrolling, "no scrollbar if history tiles falls past max rows");
+
+  // restore max rows and watch scrollbar re-appear
+  yield pushPrefs([PREF_NEWTAB_ROWS, 5]);
+  yield* addNewTabPageTab();
+  scrolling = yield hasScrollbar();
+  ok(scrolling, "scrollbar is back when max rows allow for bottom history tile");
+
+  // block that history tile, and watch scrollbar disappear
+  yield blockCell(14);
+  yield* addNewTabPageTab();
+  scrolling = yield hasScrollbar();
+  ok(!scrolling, "no scrollbar after bottom history tiles is blocked");
+
+  // Test well-populated user history - newtab has highly-frecent history sites
+  // redefine compareLinks to always choose history tiles first
+  NewTabUtils.links.compareLinks = function (aLink1, aLink2) {
+    if (aLink1.type == aLink2.type) {
+      return aLink2.frecency - aLink1.frecency ||
+             aLink2.lastVisitDate - aLink1.lastVisitDate;
+    }
+    if (aLink2.type == "history") {
+      return 1;
+    }
+    return -1;
+  };
+
+  // add a row of history tiles, directory tiles will be clipped off, hence no scrollbar
+  yield setLinks("31,32,33");
+  yield* addNewTabPageTab();
+  scrolling = yield hasScrollbar();
+  ok(!scrolling, "no scrollbar when directory tiles follow history tiles");
+
+  // fill first four rows with history tiles and observer scrollbar
+  yield setLinks("30,31,32,33,34,35,36,37,38,39");
+  yield* addNewTabPageTab();
+  scrolling = yield hasScrollbar();
+  ok(scrolling, "scrollbar appears when history tiles need extra row");
+});
+