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People are often trying to use ARel nodes inside ActiveRecord, and when they do so, lots of things can break, because ActiveRecord relies on Array#uniq and sometimes hash key equality to handle values that end up in wheres, havings, etc. By implementing equality for all the nodes, we should hopefully be able to prevent any nodes (even nodes containing other nodes) from failing an equality check they should otherwise pass, and alleviate many of these errors. Fixes #130
39 lines
979 B
Ruby
39 lines
979 B
Ruby
require 'helper'
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describe Arel::Nodes::Count do
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describe 'backwards compatibility' do
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it 'must be an expression' do
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Arel::Nodes::Count.new('foo').must_be_kind_of Arel::Expression
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end
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end
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describe "as" do
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it 'should alias the count' do
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table = Arel::Table.new :users
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table[:id].count.as('foo').to_sql.must_be_like %{
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COUNT("users"."id") AS foo
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}
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end
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end
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describe "eq" do
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it "should compare the count" do
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table = Arel::Table.new :users
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table[:id].count.eq(2).to_sql.must_be_like %{
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COUNT("users"."id") = 2
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}
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end
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end
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describe 'equality' do
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it 'is equal with equal ivars' do
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array = [Arel::Nodes::Count.new('foo'), Arel::Nodes::Count.new('foo')]
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assert_equal 1, array.uniq.size
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end
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it 'is not equal with different ivars' do
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array = [Arel::Nodes::Count.new('foo'), Arel::Nodes::Count.new('foo!')]
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assert_equal 2, array.uniq.size
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end
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end
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end
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