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require 'helper'
module Arel
describe Table do
before do
@relation = Table.new(:users)
end
it 'should create join nodes' do
join = @relation.create_string_join 'foo', 'bar'
assert_kind_of Arel::Nodes::StringJoin, join
assert_equal 'foo', join.left
assert_equal 'bar', join.right
end
it 'should create join nodes' do
join = @relation.create_join 'foo', 'bar', 'baz'
assert_kind_of Arel::Nodes::InnerJoin, join
assert_equal 'foo', join.left
assert_equal 'bar', join.right
assert_equal 'baz', join.constraint
end
it 'should create join nodes with a klass' do
join = @relation.create_join 'foo', 'bar', 'baz', Arel::Nodes::OuterJoin
assert_kind_of Arel::Nodes::OuterJoin, join
assert_equal 'foo', join.left
assert_equal 'bar', join.right
assert_equal 'baz', join.constraint
end
it 'should return an insert manager' do
im = @relation.compile_insert 'VALUES(NULL)'
assert_kind_of Arel::InsertManager, im
assert_equal 'INSERT INTO NULL VALUES(NULL)', im.to_sql
end
it 'should return IM from insert_manager' do
im = @relation.insert_manager
assert_kind_of Arel::InsertManager, im
assert_equal im.engine, @relation.engine
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 '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 '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 '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
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
end
end
end
end
end
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