Add more tests for sorting pre-epoch dates. SERVER-405 & QA-40.

jstests/sort10.js

@@ -0,0 +1,48 @@
+// signed dates check
+t = db.sort2;
+
+var opts = {};
+if (Math.random() < 0.3) {
+    opts.background = true;
+    printjson(opts);
+}
+t.drop();
+t.insert({ x: new Date(50000) });
+t.insert({ x: new Date(-50) });
+var d = new Date(-50);
+for (var pass = 0; pass < 2; pass++) {
+    assert(t.find().sort({x:1})[0].x.valueOf() == d.valueOf());
+    t.ensureIndex({ x: 1 }, opts);
+    t.insert({ x: new Date() });
+}
+
+
+
+function checkSorting(dates, sortOrder) {
+    cur = t.find().sort({x:sortOrder});
+    assert.eq(dates.length, cur.count(), "Incorrect number of results returned");
+    index = 0;
+    while (cur.hasNext()) {
+        date = cur.next().x;
+        assert.eq(dates[index].valueOf(), date.valueOf());
+        index++;
+    }
+}
+
+t.drop();
+dates = [new Date(-5000000000000), new Date(5000000000000), new Date(0), new Date(5), new Date(-5)];
+for (var i = 0; i < dates.length; i++) {
+    t.insert({x:dates[i]});
+}
+dates.sort(function(a,b){return a - b});
+reverseDates = dates.slice(0).reverse()
+
+checkSorting(dates, 1)
+checkSorting(reverseDates, -1)
+t.ensureIndex({x:1})
+checkSorting(dates, 1)
+checkSorting(reverseDates, -1)
+t.dropIndexes()
+t.ensureIndex({x:-1})
+checkSorting(dates, 1)
+checkSorting(reverseDates, -1)

jstests/sort2.js

@@ -30,19 +30,3 @@ for (var pass = 0; pass < 2; pass++) {
     }
     t.ensureIndex({ x : 1 });
 }
-
-// signed dates check
-var opts = {};
-if (Math.random() < 0.3) {
-    opts.background = true;
-    printjson(opts);
-}
-t.drop();
-t.insert({ x: new Date(50000) });
-t.insert({ x: new Date(-50) });
-var d = new Date(-50);
-for (var pass = 0; pass < 2; pass++) {
-    assert(t.find().sort({x:1})[0].x.valueOf() == d.valueOf());
-    t.ensureIndex({ x: 1 }, opts);
-    t.insert({ x: new Date() });
-}