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87 lines
3.0 KiB
JavaScript
87 lines
3.0 KiB
JavaScript
/**
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* Tests for serverStatus metrics.cursor stats.
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*/
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(function() {
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var coll = db[jsTest.name()];
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coll.drop();
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assert.writeOK(coll.insert({_id: 1}));
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assert.writeOK(coll.insert({_id: 2}));
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assert.writeOK(coll.insert({_id: 3}));
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assert.eq(3, coll.find().count());
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function getCurrentCursorsOpen() {
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return db.serverStatus().metrics.cursor.open.total;
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}
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function getCurrentCursorsPinned() {
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return db.serverStatus().metrics.cursor.open.pinned;
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}
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var initialTotalOpen = getCurrentCursorsOpen();
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// We expect no pinned cursors
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assert.eq(0, getCurrentCursorsPinned());
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// Total open cursors should not have changed after exhausting a cursor.
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assert.eq(3, coll.find().itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(3, coll.find().batchSize(2).itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(3, coll.find().batchSize(1).itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(3, coll.aggregate([]).itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(3, coll.aggregate([], {cursor: {batchSize: 2}}).itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(3, coll.aggregate([], {cursor: {batchSize: 1}}).itcount());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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// Total pinned cursors should remain zero exhausting a cursor.
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assert.eq(3, coll.find().itcount());
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assert.eq(0, getCurrentCursorsPinned());
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assert.eq(3, coll.find().batchSize(2).itcount());
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assert.eq(0, getCurrentCursorsPinned());
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assert.eq(3, coll.find().batchSize(1).itcount());
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assert.eq(0, getCurrentCursorsPinned());
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assert.eq(3, coll.aggregate([]).itcount());
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assert.eq(0, getCurrentCursorsPinned());
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assert.eq(3, coll.aggregate([], {cursor: {batchSize: 2}}).itcount());
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assert.eq(0, getCurrentCursorsPinned());
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assert.eq(3, coll.aggregate([], {cursor: {batchSize: 1}}).itcount());
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assert.eq(0, getCurrentCursorsPinned());
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// This cursor should remain open on the server, but not pinned.
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var cursor = coll.find().batchSize(2);
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cursor.next();
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assert.eq(initialTotalOpen + 1, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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// Same should be true after pulling the second document out of the cursor, since we haven't
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// issued a getMore yet.
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cursor.next();
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assert.eq(initialTotalOpen + 1, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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// Cursor no longer reported as open after being exhausted.
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cursor.next();
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assert(!cursor.hasNext());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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// Same behavior expected for an aggregation cursor.
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var cursor = coll.aggregate([], {cursor: {batchSize: 2}});
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cursor.next();
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assert.eq(initialTotalOpen + 1, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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cursor.next();
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assert.eq(initialTotalOpen + 1, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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cursor.next();
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assert(!cursor.hasNext());
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assert.eq(initialTotalOpen, getCurrentCursorsOpen());
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assert.eq(0, getCurrentCursorsPinned());
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}());
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