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// This test creates a large projection, which causes a set of field names to
// be stored in a StringMap (based on UnorderedFastKeyTable). The hash table
// starts with 20 slots, but must be grown repeatedly to hold the complete set
// of fields. This test verifies that we can grow the hash table repeatedly
// with no failures.
//
// Related to SERVER-9824.
var testDB = db.getSiblingDB('grow_hash_table');
var doTest = function(count) {
print('Testing with count of ' + count);
testDB.dropDatabase();
var id = { data: 1 };
var doc = { _id: id };
var projection = { };
// Create a document and a projection with fields r1, r2, r3 ...
for (var i = 1; i <= count; ++i) {
var r = 'r' + i;
doc[r] = i;
projection[r] = 1;
}
// Store the document
testDB.collection.insert(doc);
var errorObj = testDB.getLastErrorObj();
assert(errorObj.err == null,
'Failed to insert document, getLastErrorObj = ' + tojsononeline(errorObj));
// Try to read the document using a large projection
try {
var findCount = testDB.collection.find({ _id: id }, projection).itcount();
assert(findCount == 1,
'Failed to find single stored document, find().itcount() == ' + findCount);
}
catch (e) {
testDB.dropDatabase();
doassert('Test FAILED! Caught exception ' + tojsononeline(e));
}
testDB.dropDatabase();
jsTest.log('Test PASSED');
}
doTest(10000);
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