path: root/activerecord/test/cases/arel/table_test.rb

# frozen_string_literal: true

require_relative "helper"

module Arel
  class TableTest < Arel::Spec
    before do
      @relation = Table.new(:users)
    end

    it "should create join nodes" do
      join = @relation.create_string_join "foo"
      assert_kind_of Arel::Nodes::StringJoin, join
      assert_equal "foo", join.left
    end

    it "should create join nodes" do
      join = @relation.create_join "foo", "bar"
      assert_kind_of Arel::Nodes::InnerJoin, join
      assert_equal "foo", join.left
      assert_equal "bar", join.right
    end

    it "should create join nodes with a klass" do
      join = @relation.create_join "foo", "bar", Arel::Nodes::FullOuterJoin
      assert_kind_of Arel::Nodes::FullOuterJoin, join
      assert_equal "foo", join.left
      assert_equal "bar", join.right
    end

    it "should create join nodes with a klass" do
      join = @relation.create_join "foo", "bar", Arel::Nodes::OuterJoin
      assert_kind_of Arel::Nodes::OuterJoin, join
      assert_equal "foo", join.left
      assert_equal "bar", join.right
    end

    it "should create join nodes with a klass" do
      join = @relation.create_join "foo", "bar", Arel::Nodes::RightOuterJoin
      assert_kind_of Arel::Nodes::RightOuterJoin, join
      assert_equal "foo", join.left
      assert_equal "bar", join.right
    end

    it "should return an insert manager" do
      im = @relation.compile_insert "VALUES(NULL)"
      assert_kind_of Arel::InsertManager, im
      im.into Table.new(:users)
      assert_equal "INSERT INTO \"users\" VALUES(NULL)", im.to_sql
    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 "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 "raises EmptyJoinError on empty" do
          assert_raises(EmptyJoinError) do
            @relation.join ""
          end
        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

      describe "join" do
        it "creates an outer join" do
          right     = @relation.alias
          predicate = @relation[:id].eq(right[:id])
          mgr = @relation.outer_join(right).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
        node = @relation.alias
        node.name.must_equal "users_2"
        node[:id].relation.must_equal node
      end
    end

    describe "new" do
      it "should accept a hash" do
        rel = Table.new :users, as: "foo"
        rel.table_alias.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 Nodes::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 Nodes::SqlLiteral.new "*"
        manager.to_sql.must_be_like %{ SELECT * FROM "users" }
      end

      it "takes multiple parameters" do
        manager = @relation.project Nodes::SqlLiteral.new("*"), Nodes::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 a table name" do
      @relation.table_name.must_equal "users"
    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

    describe "equality" do
      it "is equal with equal ivars" do
        relation1 = Table.new(:users)
        relation1.table_alias = "zomg"
        relation2 = Table.new(:users)
        relation2.table_alias = "zomg"
        array = [relation1, relation2]
        assert_equal 1, array.uniq.size
      end

      it "is not equal with different ivars" do
        relation1 = Table.new(:users)
        relation1.table_alias = "zomg"
        relation2 = Table.new(:users)
        relation2.table_alias = "zomg2"
        array = [relation1, relation2]
        assert_equal 2, array.uniq.size
      end
    end
  end
end