98 lines
2.9 KiB
Ruby
98 lines
2.9 KiB
Ruby
require 'minitest/autorun'
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require 'prism'
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require 'tmpdir'
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class OrmPaginationTest < Minitest::Test
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def setup
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@dir = Dir.mktmpdir('prism-pagination-store')
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@store = Prism::Orm::Store.new(File.join(@dir, 'test.pstore'))
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@store.create_table(:widgets, %w[id name position])
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widget_class = Class.new(Prism::Orm::Model) do
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table_name :widgets
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end
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widget_class.store = @store
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Object.const_set(:Widget, widget_class)
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25.times { |i| Widget.create!(name: "widget-#{i}", position: i) }
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end
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def teardown
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FileUtils.remove_entry(@dir)
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Object.send(:remove_const, :Widget) if Object.const_defined?(:Widget)
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end
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def test_default_per_page_is_twenty_five
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relation = Widget.order(:position).page(1)
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assert_equal 25, relation.to_a.size
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assert_equal 1, relation.total_pages
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end
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def test_per_page_limits_the_page_size
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relation = Widget.order(:position).page(1).per(10)
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assert_equal 10, relation.to_a.size
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assert_equal 'widget-0', relation.to_a.first.name
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assert_equal 'widget-9', relation.to_a.last.name
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end
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def test_second_page_offsets_correctly
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relation = Widget.order(:position).page(2).per(10)
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assert_equal 'widget-10', relation.to_a.first.name
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assert_equal 'widget-19', relation.to_a.last.name
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end
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def test_last_partial_page_has_the_remainder
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relation = Widget.order(:position).page(3).per(10)
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assert_equal 5, relation.to_a.size
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end
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def test_total_count_ignores_the_page_window
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relation = Widget.page(1).per(10)
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assert_equal 25, relation.total_count
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assert_equal 3, relation.total_pages
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end
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def test_current_page_and_navigation_helpers
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relation = Widget.page(2).per(10)
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assert_equal 2, relation.current_page
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assert_equal 1, relation.prev_page
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assert_equal 3, relation.next_page
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refute relation.first_page?
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refute relation.last_page?
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end
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def test_first_and_last_page_edges
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first = Widget.page(1).per(10)
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assert first.first_page?
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assert_nil first.prev_page
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last = Widget.page(3).per(10)
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assert last.last_page?
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assert_nil last.next_page
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end
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def test_page_number_is_clamped_to_at_least_one
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relation = Widget.page(0).per(10)
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assert_equal 1, relation.current_page
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end
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def test_out_of_range_page_returns_no_records_but_reports_totals
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relation = Widget.page(99).per(10)
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assert_empty relation.to_a
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assert relation.out_of_range?
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assert_equal 25, relation.total_count
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end
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def test_page_composes_with_where_and_order
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relation = Widget.where(position: (5..14).to_a).order(:position).page(1).per(5)
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assert_equal %w[widget-5 widget-6 widget-7 widget-8 widget-9], relation.to_a.map(&:name)
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assert_equal 10, relation.total_count
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assert_equal 2, relation.total_pages
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end
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def test_per_before_page_and_page_before_per_are_equivalent
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a = Widget.order(:position).per(4).page(2)
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b = Widget.order(:position).page(2).per(4)
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assert_equal a.to_a.map(&:id), b.to_a.map(&:id)
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end
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end
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