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require File.expand_path('spec_helper', File.dirname(__FILE__) + '/../')
describe EMMongo::Cursor do
include EM::Spec
it 'should describe itself via inspect' do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new( @coll, :selector => {'a' => 1} )
cursor.inspect.should == "<EM::Mongo::Cursor:0x#{cursor.object_id.to_s} namespace='#{@coll.db.name}.#{@coll.name}' " +
"@selector=#{cursor.selector.inspect}>"
done
end
it 'should explain itself' do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll, :selector => {'a' => 1} )
cursor.explain.callback do |explanation|
explanation['cursor'].should_not be_nil
explanation['n'].should be_kind_of Numeric
explanation['millis'].should be_kind_of Numeric
explanation['nscanned'].should be_kind_of Numeric
done
end
end
it "should allow limit and skip to be chained" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
all = []
10.times do |i|
all << {"x" => i}
@coll.save(all[-1])
end
cursor.limit(5).skip(3).sort("x",1).defer_as_a.callback do |results|
all.slice(3...8).each_with_index do |item,idx|
results[idx]["x"].should == item["x"]
end
done
end
end
it "should allow a limit larger than the batch size" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll, :selector => {})
all = []
1501.times do |i|
@coll.insert(i.to_s => i.to_s)
end
cursor.limit(1500).defer_as_a.callback do |docs|
docs.length.should == 1500
done
end
end
it "should say if it has next" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
1.times do |i|
@coll.save("x" => 1)
end
cursor.has_next?.callback do |result|
result.should be_true
cursor.next_document.callback do |doc|
cursor.has_next?.callback do |result|
result.should be_false
done
end
end
end
end
it "should rewind" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
100.times do |i|
@coll.save("x" => 1)
end
cursor.defer_as_a.callback do |r1|
r1.length.should == 100
cursor.defer_as_a.callback do |r2|
r2.length.should == 0
cursor.rewind!
cursor.defer_as_a.callback do |r3|
r3.length.should == 100
done
end
end
end
end
describe "Get More" do
it "should refill via get more" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
1000.times do |i|
@coll.save("x" => 1)
end
cursor.defer_as_a.callback do |results|
results.length.should == 1000
done
end
end
end
describe "Count" do
it 'should count 0 records in a empty collection' do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
cursor.count.callback do |c|
c.should == 0
done
end
end
it "should count records in a collection" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll)
10.times do |i|
@coll.save("x" => 1)
end
cursor.count.callback do |c|
c.should == 10
done
end
end
it "should ignore skip and limit by default" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll).skip(5).limit(5)
10.times do |i|
@coll.save("x" => i)
end
cursor.count.callback do |c|
c.should == 10
done
end
end
it "should account for skip when requested" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll).limit(5)
10.times do |i|
@coll.save("x" => i)
end
cursor.count(true).callback do |c|
c.should == 5
done
end
end
it "should account for skip when requested" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll).skip(5)
10.times do |i|
@coll.save("x" => i)
end
cursor.count(true).callback do |c|
c.should == 5
done
end
end
it "should count based on a simple selector" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll, :selector => {"x"=>1})
10.times do |i|
@coll.save("x" => i)
end
cursor.count(true).callback do |c|
c.should == 1
done
end
end
it "should count based on a selector with an operator" do
@conn, @coll = connection_and_collection
cursor = EM::Mongo::Cursor.new(@coll, :selector => {"x"=>{"$lt"=>5}})
10.times do |i|
@coll.save("x" => i)
end
cursor.count(true).callback do |c|
c.should == 5
done
end
end
it "should count a non-existing collection as 0 without vomiting blood" do
@conn, @coll = connection_and_collection
@coll = @conn.db.collection('imnotreallyheredontlookatme')
cursor = EM::Mongo::Cursor.new(@coll)
cursor.count(true).callback do |c|
c.should == 0
done
end
end
end
describe "Sort" do
it "should sort ascending" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.save("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll).sort(:x, 1)
cursor.next_document.callback do |first|
first["x"].should == 0
done
end
end
it "should sort descending" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.save("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll).sort(:x, -1)
cursor.next_document.callback do |first|
first["x"].should == 4
done
end
end
it "should sort descending using a symbol sort dir" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.save("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll).sort(["x", :desc])
cursor.next_document.callback do |first|
first["x"].should == 4
done
end
end
it "should not allow sort to be called on an executed cursor" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.save("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll).sort(["x", :desc])
cursor.next_document.callback do |first|
lambda { cursor.sort("x",1) }.should raise_error EM::Mongo::InvalidOperation
done
end
end
it "should sort by dates" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.insert("x" => Time.utc(2000 + i))
end
cursor = EM::Mongo::Cursor.new(@coll).sort(["x", :desc])
cursor.next_document.callback do |first|
first["x"].year.should == 2004
done
end
end
describe "Each" do
it "should iterate through each doc, returning null when done" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.insert("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll)
counter = 0
cursor.each do |doc|
if doc
counter+=1
else
counter.should == 5
done
end
end
end
end
describe "defer_as_a" do
it "should return an array of all documents in a query" do
@conn, @coll = connection_and_collection
5.times do |i|
@coll.insert("x" => i)
end
cursor = EM::Mongo::Cursor.new(@coll).sort("x",1)
cursor.defer_as_a.callback do |docs|
docs.length.should == 5
5.times do |i|
docs[i]["x"].should == i
end
done
end
end
end
describe "Transformer (a robot in disguise)" do
it "should set the transformer when passed in the constructor" do
@conn, @coll = connection_and_collection
transformer = Proc.new {|doc|doc}
cursor = EM::Mongo::Cursor.new(@coll, :transformer => transformer)
cursor.transformer.should == transformer
done
end
it "should transform docs with next" do
@conn, @coll = connection_and_collection
@coll.insert({:a=>1})
klass = Struct.new(:id,:a)
transformer = Proc.new {|doc|klass.new(doc['_id'],doc['a'])}
cursor = EM::Mongo::Cursor.new(@coll, :transformer => transformer)
cursor.next.callback do |doc|
doc.should be_kind_of klass
doc.id.should be_kind_of BSON::ObjectId
doc.a.should == 1
done
end
end
it "should transform docs with each" do
@conn, @coll = connection_and_collection
@coll.insert({:a=>1})
klass = Struct.new(:id, :a)
transformer = Proc.new { |doc| klass.new(doc['_id'], doc['a']) }
cursor = EM::Mongo::Cursor.new(@coll, :transformer => transformer)
cursor.each do |doc|
if doc
doc.should be_kind_of klass
doc.id.should be_kind_of BSON::ObjectId
doc.a.should == 1
end
done
end
end
end
end
end
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