shard-crystal-db/spec/database_spec.cr

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2016-08-18 03:55:43 +00:00
require "./spec_helper"
describe DB::Database do
it "allows connection initialization" do
cnn_setup = 0
DB.open "dummy://localhost:1027?initial_pool_size=2&max_pool_size=4&max_idle_pool_size=1" do |db|
cnn_setup.should eq(0)
db.setup_connection do |cnn|
cnn_setup += 1
end
cnn_setup.should eq(2)
db.using_connection do
cnn_setup.should eq(2)
db.using_connection do
cnn_setup.should eq(2)
db.using_connection do
cnn_setup.should eq(3)
db.using_connection do
cnn_setup.should eq(4)
end
# the pool didn't shrink no new initialization should be done next
db.using_connection do
cnn_setup.should eq(4)
end
end
# the pool shrink 1. max_idle_pool_size=1
# after the previous end there where 2.
db.using_connection do
cnn_setup.should eq(4)
# so now there will be a new connection created
db.using_connection do
cnn_setup.should eq(5)
end
end
end
end
end
end
it "should allow creation of more statements than pool connections" do
DB.open "dummy://localhost:1027?initial_pool_size=1&max_pool_size=2" do |db|
db.build("query1").should be_a(DB::PoolPreparedStatement)
db.build("query2").should be_a(DB::PoolPreparedStatement)
db.build("query3").should be_a(DB::PoolPreparedStatement)
end
end
it "should return same statement in pool per query" do
with_dummy do |db|
stmt = db.build("query1")
db.build("query2").should_not eq(stmt)
db.build("query1").should eq(stmt)
end
end
it "should close pool statements when closing db" do
stmt = uninitialized DB::PoolStatement
with_dummy do |db|
stmt = db.build("query1")
end
stmt.closed?.should be_true
end
it "should not reconnect if connection is lost and retry_attempts=0" do
DummyDriver::DummyConnection.clear_connections
DB.open "dummy://localhost:1027?initial_pool_size=1&max_pool_size=1&retry_attempts=0" do |db|
db.exec("stmt1")
DummyDriver::DummyConnection.connections.size.should eq(1)
DummyDriver::DummyConnection.connections.first.disconnect!
expect_raises DB::PoolRetryAttemptsExceeded do
db.exec("stmt1")
end
DummyDriver::DummyConnection.connections.size.should eq(1)
end
end
it "should reconnect if connection is lost and executing same statement" do
DummyDriver::DummyConnection.clear_connections
DB.open "dummy://localhost:1027?initial_pool_size=1&max_pool_size=1&retry_attempts=1" do |db|
db.exec("stmt1")
DummyDriver::DummyConnection.connections.size.should eq(1)
DummyDriver::DummyConnection.connections.first.disconnect!
db.exec("stmt1")
DummyDriver::DummyConnection.connections.size.should eq(2)
end
end
it "should allow new connections if pool can increased and retry is not allowed" do
DummyDriver::DummyConnection.clear_connections
DB.open "dummy://localhost:1027?initial_pool_size=1&max_pool_size=2&retry_attempts=0" do |db|
db.query("stmt1")
DummyDriver::DummyConnection.connections.size.should eq(1)
db.query("stmt1")
DummyDriver::DummyConnection.connections.size.should eq(2)
end
end
describe "prepared_statements connection option" do
it "defaults to true" do
with_dummy "dummy://localhost:1027" do |db|
db.prepared_statements?.should be_true
end
end
it "can be set to false" do
with_dummy "dummy://localhost:1027?prepared_statements=false" do |db|
db.prepared_statements?.should be_false
end
end
it "is copied to connections (false)" do
with_dummy "dummy://localhost:1027?prepared_statements=false&initial_pool_size=1" do |db|
connection = DummyDriver::DummyConnection.connections.first
connection.prepared_statements?.should be_false
end
end
it "is copied to connections (true)" do
with_dummy "dummy://localhost:1027?prepared_statements=true&initial_pool_size=1" do |db|
connection = DummyDriver::DummyConnection.connections.first
connection.prepared_statements?.should be_true
end
end
it "should build prepared statements if true" do
with_dummy "dummy://localhost:1027?prepared_statements=true" do |db|
db.build("the query").should be_a(DB::PoolPreparedStatement)
end
end
it "should build unprepared statements if false" do
with_dummy "dummy://localhost:1027?prepared_statements=false" do |db|
db.build("the query").should be_a(DB::PoolUnpreparedStatement)
end
end
it "should be overrided by dsl" do
with_dummy "dummy://localhost:1027?prepared_statements=true" do |db|
stmt = db.unprepared.query("the query").statement.as(DummyDriver::DummyStatement)
stmt.prepared?.should be_false
end
with_dummy "dummy://localhost:1027?prepared_statements=false" do |db|
stmt = db.prepared.query("the query").statement.as(DummyDriver::DummyStatement)
stmt.prepared?.should be_true
end
end
end
describe "unprepared statements in pool" do
it "creating statements should not create new connections" do
with_dummy "dummy://localhost:1027?initial_pool_size=1" do |db|
stmt1 = db.unprepared.build("query1")
stmt2 = db.unprepared.build("query2")
DummyDriver::DummyConnection.connections.size.should eq(1)
end
end
it "simultaneous statements should go to different connections" do
with_dummy "dummy://localhost:1027?initial_pool_size=1" do |db|
rs1 = db.unprepared.query("query1")
rs2 = db.unprepared.query("query2")
rs1.statement.connection.should_not eq(rs2.statement.connection)
DummyDriver::DummyConnection.connections.size.should eq(2)
end
end
it "sequential statements should go to different connections" do
with_dummy "dummy://localhost:1027?initial_pool_size=1" do |db|
rs1 = db.unprepared.query("query1")
rs1.close
rs2 = db.unprepared.query("query2")
rs2.close
rs1.statement.connection.should eq(rs2.statement.connection)
DummyDriver::DummyConnection.connections.size.should eq(1)
end
end
end
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end