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require 'helper'
module Arel
describe Table do
before do
@relation = Table.new(:users)
end
describe 'skip' do
it 'should add an offset' do
sm = @relation.skip 2
sm.to_sql.must_be_like "SELECT FROM \"users\" OFFSET 2"
end
end
describe 'primary_key' do
it 'should return an attribute' do
@relation.primary_key.name.must_equal :id
end
end
describe 'select_manager' do
it 'should return an empty select manager' do
sm = @relation.select_manager
sm.to_sql.must_be_like 'SELECT'
end
end
describe 'having' do
it 'adds a having clause' do
mgr = @relation.having @relation[:id].eq(10)
mgr.to_sql.must_be_like %{
SELECT FROM "users" HAVING "users"."id" = 10
}
end
end
describe 'backwards compat' do
describe 'joins' do
it 'returns nil' do
@relation.joins(nil).must_equal nil
end
end
describe 'join' do
it 'noops on nil' do
mgr = @relation.join nil
mgr.to_sql.must_be_like %{ SELECT FROM "users" }
end
it 'takes a second argument for join type' do
right = @relation.alias
predicate = @relation[:id].eq(right[:id])
mgr = @relation.join(right, Nodes::OuterJoin).on(predicate)
mgr.to_sql.must_be_like %{
SELECT FROM "users"
LEFT OUTER JOIN "users" "users_2"
ON "users"."id" = "users_2"."id"
}
end
end
end
describe 'group' do
it 'should create a group' do
manager = @relation.group @relation[:id]
manager.to_sql.must_be_like %{
SELECT FROM "users" GROUP BY "users"."id"
}
end
end
describe 'alias' do
it 'should create a node that proxies to a table' do
@relation.aliases.must_equal []
node = @relation.alias
@relation.aliases.must_equal [node]
node.name.must_equal 'users_2'
node[:id].relation.must_equal node
end
end
describe 'new' do
it 'takes :columns' do
columns = Table.engine.connection.columns("users")
@relation = Table.new(:users, :columns => columns)
@relation.columns.first.name.must_equal :id
@relation.engine.must_equal Table.engine
end
it 'should accept an engine' do
rel = Table.new :users, 'foo'
rel.engine.must_equal 'foo'
end
it 'should accept a hash' do
rel = Table.new :users, :engine => 'foo'
rel.engine.must_equal 'foo'
end
it 'ignores as if it equals name' do
rel = Table.new :users, :as => 'users'
rel.table_alias.must_be_nil
end
end
describe 'order' do
it "should take an order" do
manager = @relation.order "foo"
manager.to_sql.must_be_like %{ SELECT FROM "users" ORDER BY foo }
end
end
describe 'take' do
it "should add a limit" do
manager = @relation.take 1
manager.project SqlLiteral.new '*'
manager.to_sql.must_be_like %{ SELECT * FROM "users" LIMIT 1 }
end
end
describe 'project' do
it 'can project' do
manager = @relation.project SqlLiteral.new '*'
manager.to_sql.must_be_like %{ SELECT * FROM "users" }
end
it 'takes multiple parameters' do
manager = @relation.project SqlLiteral.new('*'), SqlLiteral.new('*')
manager.to_sql.must_be_like %{ SELECT *, * FROM "users" }
end
end
describe 'where' do
it "returns a tree manager" do
manager = @relation.where @relation[:id].eq 1
manager.project @relation[:id]
manager.must_be_kind_of TreeManager
manager.to_sql.must_be_like %{
SELECT "users"."id"
FROM "users"
WHERE "users"."id" = 1
}
end
end
describe 'columns' do
it 'returns a list of columns' do
columns = @relation.columns
columns.length.must_equal 4
columns.map { |x| x.name.to_s }.sort.must_equal %w{ created_at bool name id }.sort
end
end
it "should have a name" do
@relation.name.must_equal 'users'
end
it "should have an engine" do
@relation.engine.must_equal Table.engine
end
describe '[]' do
describe 'when given a Symbol' do
it "manufactures an attribute if the symbol names an attribute within the relation" do
column = @relation[:id]
column.name.must_equal :id
column.must_be_kind_of Attributes::Integer
end
end
describe 'when table does not exist' do
it 'returns nil' do
@relation[:foooo].must_be_nil
end
end
end
end
describe Table do
describe 'when checking the existence of a table' do
it 'should be present in the table cache despite the class of its name' do
[ 'users', :users ].each do |name|
relation = Table.new name
Table.table_cache(relation.engine).key?(relation.name).must_equal true
end
end
end
end
end
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