couchrest_model/spec/couchrest/helpers/pager_spec.rb

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require File.dirname(__FILE__) + '/../../spec_helper'
describe CouchRest::Pager do
before(:all) do
@cr = CouchRest.new(COUCHHOST)
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@db = @cr.database(TESTDB)
@db.delete! rescue nil
@db = @cr.create_db(TESTDB) rescue nil
@pager = CouchRest::Pager.new(@db)
end
after(:all) do
begin
@db.delete!
rescue RestClient::Request::RequestFailed
end
end
it "should store the db" do
@pager.db.should == @db
end
describe "paging all docs" do
before(:all) do
@docs = []
100.times do |i|
@docs << ({:number => (i % 10)})
end
@db.bulk_save(@docs)
end
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it "should yield total_docs / limit times" do
n = 0
@pager.all_docs(10) do |doc|
n += 1
end
n.should == 10
end
it "should yield each docrow group without duplicate docs" do
docids = {}
@pager.all_docs(10) do |docrows|
docrows.each do |row|
docids[row['id']].should be_nil
docids[row['id']] = true
end
end
docids.keys.length.should == 100
end
it "should yield each docrow group" do
@pager.all_docs(10) do |docrows|
doc = @db.get(docrows[0]['id'])
doc['number'].class.should == Fixnum
end
end
end
describe "Pager with a view and docs" do
before(:all) do
@docs = []
100.times do |i|
@docs << ({:number => (i % 10)})
end
@db.bulk_save(@docs)
@db.save_doc({
'_id' => '_design/magic',
'views' => {
'number' => {
'map' => 'function(doc){emit(doc.number,null)}'
}
}
})
end
it "should have docs" do
@docs.length.should == 100
@db.documents['rows'].length.should == 101
end
it "should have a view" do
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@db.view('magic/number', :limit => 10)['rows'][0]['key'].should == 0
end
it "should yield once per key" do
results = {}
@pager.key_reduce('magic/number', 20) do |k,vs|
results[k] = vs.length
end
results[0].should == 10
results[3].should == 10
end
it "with a small step size should yield once per key" do
results = {}
@pager.key_reduce('magic/number', 7) do |k,vs|
results[k] = vs.length
end
results[0].should == 10
results[3].should == 10
results[9].should == 10
end
it "with a large step size should yield once per key" do
results = {}
@pager.key_reduce('magic/number', 1000) do |k,vs|
results[k] = vs.length
end
results[0].should == 10
results[3].should == 10
results[9].should == 10
end
it "with a begin and end should only yield in the range (and leave out the lastkey)" do
results = {}
@pager.key_reduce('magic/number', 1000, 4, 7) do |k,vs|
results[k] = vs.length
end
results[0].should be_nil
results[4].should == 10
results[6].should == 10
results[7].should be_nil
results[8].should be_nil
results[9].should be_nil
end
end
end