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require_relative "spec_helper"
describe "List plugin" do
def klass(opts={})
@db = DB
c = Class.new(Sequel::Model(@db[:items]))
c.class_eval do
columns :id, :position, :scope_id, :pos
plugin :list, opts
self.use_transactions = false
end
c
end
before do
@c = klass
@o = @c.load(:id=>7, :position=>3)
@sc = klass(:scope=>:scope_id)
@so = @sc.load(:id=>7, :position=>3, :scope_id=>5)
@tc = klass(:top=>0)
@to = @tc.load(:id=>7, :position=>3)
@db.reset
end
it "should default to using :position as the position field" do
@c.position_field.must_equal :position
@c.new.list_dataset.sql.must_equal 'SELECT * FROM items ORDER BY position'
end
it "should accept a :field option to modify the position field" do
klass(:field=>:pos).position_field.must_equal :pos
end
it "should accept a :scope option with a symbol for a single scope column" do
@sc.new(:scope_id=>4).list_dataset.sql.must_equal 'SELECT * FROM items WHERE (scope_id = 4) ORDER BY scope_id, position'
end
it "should accept a :scope option with an array of symbols for multiple scope columns" do
['SELECT * FROM items WHERE ((scope_id = 4) AND (pos = 3)) ORDER BY scope_id, pos, position',
'SELECT * FROM items WHERE ((pos = 3) AND (scope_id = 4)) ORDER BY scope_id, pos, position'].
must_include(klass(:scope=>[:scope_id, :pos]).new(:scope_id=>4, :pos=>3).list_dataset.sql)
end
it "should accept a :scope option with a proc for a custom list scope" do
klass(:scope=>proc{|o| o.model.dataset.filter(:active).filter(:scope_id=>o.scope_id)}).new(:scope_id=>4).list_dataset.sql.must_equal 'SELECT * FROM items WHERE (active AND (scope_id = 4)) ORDER BY position'
end
it "should default top of the list to 1" do
@c.top_of_list.must_equal 1
end
it "should accept a :top option to set top of the list" do
@tc.top_of_list.must_equal 0
end
it "should modify the order when using the plugin" do
c = Class.new(Sequel::Model(:items))
c.dataset.sql.must_equal 'SELECT * FROM items'
c.plugin :list
c.dataset.sql.must_equal 'SELECT * FROM items ORDER BY position'
end
it "should be able to access the position field as a class attribute" do
@c.position_field.must_equal :position
klass(:field=>:pos).position_field.must_equal :pos
end
it "should be able to access the scope proc as a class attribute" do
@c.scope_proc.must_be_nil
@sc.scope_proc[@sc.new(:scope_id=>4)].sql.must_equal 'SELECT * FROM items WHERE (scope_id = 4) ORDER BY scope_id, position'
end
it "should work correctly in subclasses" do
c = Class.new(klass(:scope=>:scope_id))
c.position_field.must_equal :position
c.scope_proc[c.new(:scope_id=>4)].sql.must_equal 'SELECT * FROM items WHERE (scope_id = 4) ORDER BY scope_id, position'
end
it "should have at_position return the model object at the given position" do
@c.dataset = @c.dataset.with_fetch(:id=>1, :position=>1)
@o.at_position(10).must_equal @c.load(:id=>1, :position=>1)
@sc.dataset = @sc.dataset.with_fetch(:id=>2, :position=>2, :scope_id=>5)
@so.at_position(20).must_equal @sc.load(:id=>2, :position=>2, :scope_id=>5)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 10) ORDER BY position LIMIT 1",
"SELECT * FROM items WHERE ((scope_id = 5) AND (position = 20)) ORDER BY scope_id, position LIMIT 1"]
end
it "should have position field set to max+1 when creating if not already set" do
@c.dataset = @c.dataset.with_autoid(1).with_fetch([[{:pos=>nil}], [{:id=>1, :position=>1}], [{:pos=>1}], [{:id=>2, :position=>2}]])
@c.create.values.must_equal(:id=>1, :position=>1)
@c.create.values.must_equal(:id=>2, :position=>2)
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"INSERT INTO items (position) VALUES (1)",
"SELECT * FROM items WHERE (id = 1) ORDER BY position LIMIT 1",
"SELECT max(position) AS max FROM items LIMIT 1",
"INSERT INTO items (position) VALUES (2)",
"SELECT * FROM items WHERE (id = 2) ORDER BY position LIMIT 1"]
end
it "should have position field set to max+1 in scope when creating if not already set" do
@sc.dataset = @sc.dataset.with_autoid(1).with_fetch([[{:pos=>nil}], [{:id=>1, :scope_id=>1, :position=>1}], [{:pos=>1}], [{:id=>2, :scope_id=>1, :position=>2}], [{:pos=>nil}], [{:id=>3, :scope_id=>2, :position=>1}]])
@sc.create(:scope_id=>1).values.must_equal(:id=>1, :scope_id=>1, :position=>1)
@sc.create(:scope_id=>1).values.must_equal(:id=>2, :scope_id=>1, :position=>2)
@sc.create(:scope_id=>2).values.must_equal(:id=>3, :scope_id=>2, :position=>1)
@db.sqls.must_equal ["SELECT max(position) AS max FROM items WHERE (scope_id = 1) LIMIT 1",
'INSERT INTO items (scope_id, position) VALUES (1, 1)',
"SELECT * FROM items WHERE (id = 1) ORDER BY scope_id, position LIMIT 1",
"SELECT max(position) AS max FROM items WHERE (scope_id = 1) LIMIT 1",
'INSERT INTO items (scope_id, position) VALUES (1, 2)',
"SELECT * FROM items WHERE (id = 2) ORDER BY scope_id, position LIMIT 1",
"SELECT max(position) AS max FROM items WHERE (scope_id = 2) LIMIT 1",
'INSERT INTO items (scope_id, position) VALUES (2, 1)',
"SELECT * FROM items WHERE (id = 3) ORDER BY scope_id, position LIMIT 1"]
end
it "should update positions automatically on deletion" do
@o.destroy
@db.sqls.must_equal ["DELETE FROM items WHERE (id = 7)", "UPDATE items SET position = (position - 1) WHERE (position > 3)"]
end
it "should have last_position return the last position in the list" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.last_position.must_equal 10
@sc.dataset = @sc.dataset.with_fetch(:max=>20)
@so.last_position.must_equal 20
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"SELECT max(position) AS max FROM items WHERE (scope_id = 5) LIMIT 1"]
end
it "should have list_dataset return the model's dataset for non scoped lists" do
@o.list_dataset.sql.must_equal 'SELECT * FROM items ORDER BY position'
end
it "should have list dataset return a scoped dataset for scoped lists" do
@so.list_dataset.sql.must_equal 'SELECT * FROM items WHERE (scope_id = 5) ORDER BY scope_id, position'
end
it "should have move_down without an argument move down a single position" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_down.must_equal @o
@o.position.must_equal 4
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"UPDATE items SET position = (position - 1) WHERE ((position >= 4) AND (position <= 4))",
"UPDATE items SET position = 4 WHERE (id = 7)"]
end
it "should have move_down with an argument move down the given number of positions" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_down(3).must_equal @o
@o.position.must_equal 6
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"UPDATE items SET position = (position - 1) WHERE ((position >= 4) AND (position <= 6))",
"UPDATE items SET position = 6 WHERE (id = 7)"]
end
it "should have move_down with a negative argument move up the given number of positions" do
@o.move_down(-1).must_equal @o
@o.position.must_equal 2
@db.sqls.must_equal ["UPDATE items SET position = (position + 1) WHERE ((position >= 2) AND (position < 3))",
"UPDATE items SET position = 2 WHERE (id = 7)"]
end
it "should have move_to handle out of range targets" do
@o.move_to(0)
@o.position.must_equal 1
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_to(11)
@o.position.must_equal 10
end
it "should have move_to use a transaction if the instance is configured to use transactions" do
@o.use_transactions = true
@o.move_to(2)
@db.sqls.must_equal ["BEGIN",
"UPDATE items SET position = (position + 1) WHERE ((position >= 2) AND (position < 3))",
"UPDATE items SET position = 2 WHERE (id = 7)",
"COMMIT"]
end
it "should have move_to do nothing if the target position is the same as the current position" do
@o.use_transactions = true
@o.move_to(@o.position).must_equal @o
@o.position.must_equal 3
@db.sqls.must_equal []
end
it "should have move to shift entries correctly between current and target if moving up" do
@o.move_to(2)
@db.sqls.first.must_equal "UPDATE items SET position = (position + 1) WHERE ((position >= 2) AND (position < 3))"
end
it "should have move to shift entries correctly between current and target if moving down" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_to(4)
@db.sqls[1].must_equal "UPDATE items SET position = (position - 1) WHERE ((position >= 4) AND (position <= 4))"
end
it "should have move_to_bottom move the item to the last position" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_to_bottom
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"UPDATE items SET position = (position - 1) WHERE ((position >= 4) AND (position <= 10))",
"UPDATE items SET position = 10 WHERE (id = 7)"]
end
it "should have move_to_top move the item to the first position" do
@o.move_to_top
@db.sqls.must_equal ["UPDATE items SET position = (position + 1) WHERE ((position >= 1) AND (position < 3))",
"UPDATE items SET position = 1 WHERE (id = 7)"]
end
it "should have move_to_top use position 0 when :top_of_list is 0" do
@to.move_to_top
@db.sqls.must_equal ["UPDATE items SET position = (position + 1) WHERE ((position >= 0) AND (position < 3))",
"UPDATE items SET position = 0 WHERE (id = 7)"]
end
it "should have move_up without an argument move up a single position" do
@o.move_up.must_equal @o
@o.position.must_equal 2
@db.sqls.must_equal ["UPDATE items SET position = (position + 1) WHERE ((position >= 2) AND (position < 3))",
"UPDATE items SET position = 2 WHERE (id = 7)"]
end
it "should have move_up with an argument move up the given number of positions" do
@o.move_up(2).must_equal @o
@o.position.must_equal 1
@db.sqls.must_equal ["UPDATE items SET position = (position + 1) WHERE ((position >= 1) AND (position < 3))",
"UPDATE items SET position = 1 WHERE (id = 7)"]
end
it "should have move_up with a negative argument move down the given number of positions" do
@c.dataset = @c.dataset.with_fetch(:max=>10)
@o.move_up(-1).must_equal @o
@o.position.must_equal 4
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1",
"UPDATE items SET position = (position - 1) WHERE ((position >= 4) AND (position <= 4))",
"UPDATE items SET position = 4 WHERE (id = 7)"]
end
it "should have next return the next entry in the list if not given an argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>4)
@o.next.must_equal @c.load(:id=>9, :position=>4)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 4) ORDER BY position LIMIT 1"]
end
it "should have next return the entry the given number of positions below the instance if given an argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>5)
@o.next(2).must_equal @c.load(:id=>9, :position=>5)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 5) ORDER BY position LIMIT 1"]
end
it "should have next return receiver if given zero" do
@o.next(0).must_be_same_as @o
@db.sqls.must_equal []
end
it "should have next return a previous entry if given a negative argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>2)
@o.next(-1).must_equal @c.load(:id=>9, :position=>2)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 2) ORDER BY position LIMIT 1"]
end
it "should have position_value return the value of the position field" do
@o.position_value.must_equal 3
end
it "should have prev return the previous entry in the list if not given an argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>2)
@o.prev.must_equal @c.load(:id=>9, :position=>2)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 2) ORDER BY position LIMIT 1"]
end
it "should have prev return the entry the given number of positions above the instance if given an argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>1)
@o.prev(2).must_equal @c.load(:id=>9, :position=>1)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 1) ORDER BY position LIMIT 1"]
end
it "should have prev return a following entry if given a negative argument" do
@c.dataset = @c.dataset.with_fetch(:id=>9, :position=>4)
@o.prev(-1).must_equal @c.load(:id=>9, :position=>4)
@db.sqls.must_equal ["SELECT * FROM items WHERE (position = 4) ORDER BY position LIMIT 1"]
end
it "should work correctly with validation on position" do
@c.class_eval do
def validate
super
errors.add(:position, "not set") unless position
end
end
@c.create
@db.sqls.must_equal ["SELECT max(position) AS max FROM items LIMIT 1", "INSERT INTO items (position) VALUES (2)", "SELECT * FROM items WHERE (id = 10) ORDER BY position LIMIT 1"]
end
end
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