91 lines
2.6 KiB
Ruby
91 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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require "cases/helper"
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require "models/developer"
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require "models/comment"
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require "models/post"
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require "models/topic"
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class NullRelationTest < ActiveRecord::TestCase
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fixtures :posts, :comments
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def test_none
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assert_no_queries do
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assert_equal [], Developer.none
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assert_equal [], Developer.all.none
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end
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end
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def test_none_chainable
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assert_queries(0) do
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assert_equal [], Developer.none.where(name: "David")
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end
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end
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def test_none_chainable_to_existing_scope_extension_method
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assert_no_queries do
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assert_equal 1, Topic.anonymous_extension.none.one
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end
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end
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def test_async_query_on_null_relation
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assert_no_queries do
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assert_equal [], Developer.none.load_async.load
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end
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end
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def test_none_chained_to_methods_firing_queries_straight_to_db
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assert_no_queries do
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assert_equal [], Developer.none.pluck(:id, :name)
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assert_equal 0, Developer.none.delete_all
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assert_equal 0, Developer.none.update_all(name: "David")
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assert_equal 0, Developer.none.delete(1)
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assert_equal false, Developer.none.exists?(1)
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end
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end
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def test_null_relation_content_size_methods
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assert_no_queries do
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assert_equal 0, Developer.none.size
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assert_equal 0, Developer.none.count
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assert_equal true, Developer.none.empty?
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assert_equal true, Developer.none.none?
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assert_equal false, Developer.none.any?
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assert_equal false, Developer.none.one?
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assert_equal false, Developer.none.many?
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end
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end
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def test_null_relation_metadata_methods
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assert_includes Developer.none.to_sql, " WHERE (1=0)"
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assert_equal({}, Developer.none.where_values_hash)
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end
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def test_null_relation_where_values_hash
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assert_equal({ "salary" => 100_000 }, Developer.none.where(salary: 100_000).where_values_hash)
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end
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[:count, :sum].each do |method|
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define_method "test_null_relation_#{method}" do
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assert_no_queries do
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assert_equal 0, Comment.none.public_send(method, :id)
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assert_equal Hash.new, Comment.none.group(:post_id).public_send(method, :id)
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end
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end
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end
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[:average, :minimum, :maximum].each do |method|
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define_method "test_null_relation_#{method}" do
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assert_no_queries do
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assert_nil Comment.none.public_send(method, :id)
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assert_equal Hash.new, Comment.none.group(:post_id).public_send(method, :id)
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end
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end
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end
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def test_null_relation_in_where_condition
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assert_operator Comment.count, :>, 0 # precondition, make sure there are comments.
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assert_equal 0, Comment.where(post_id: Post.none).count
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end
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end
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