141 lines
3.7 KiB
Ruby
141 lines
3.7 KiB
Ruby
require 'helper'
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require 'will_paginate/array'
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class ArrayPaginationTest < Test::Unit::TestCase
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def test_simple
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collection = ('a'..'e').to_a
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[{ :page => 1, :per_page => 3, :expected => %w( a b c ) },
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{ :page => 2, :per_page => 3, :expected => %w( d e ) },
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{ :page => 1, :per_page => 5, :expected => %w( a b c d e ) },
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{ :page => 3, :per_page => 5, :expected => [] },
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].
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each do |conditions|
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expected = conditions.delete :expected
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assert_equal expected, collection.paginate(conditions)
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end
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end
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def test_defaults
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result = (1..50).to_a.paginate
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assert_equal 1, result.current_page
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assert_equal 30, result.size
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end
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def test_deprecated_api
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assert_raise(ArgumentError) { [].paginate(2) }
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assert_raise(ArgumentError) { [].paginate(2, 10) }
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end
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def test_total_entries_has_precedence
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result = %w(a b c).paginate :total_entries => 5
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assert_equal 5, result.total_entries
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end
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def test_argument_error_with_params_and_another_argument
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assert_raise ArgumentError do
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[].paginate({}, 5)
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end
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end
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def test_paginated_collection
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entries = %w(a b c)
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collection = create(2, 3, 10) do |pager|
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assert_equal entries, pager.replace(entries)
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end
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assert_equal entries, collection
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assert_respond_to_all collection, %w(total_pages each offset size current_page per_page total_entries)
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assert_kind_of Array, collection
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assert_instance_of Array, collection.entries
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assert_equal 3, collection.offset
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assert_equal 4, collection.total_pages
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assert !collection.out_of_bounds?
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end
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def test_previous_next_pages
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collection = create(1, 1, 3)
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assert_nil collection.previous_page
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assert_equal 2, collection.next_page
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collection = create(2, 1, 3)
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assert_equal 1, collection.previous_page
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assert_equal 3, collection.next_page
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collection = create(3, 1, 3)
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assert_equal 2, collection.previous_page
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assert_nil collection.next_page
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end
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def test_out_of_bounds
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entries = create(2, 3, 2){}
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assert entries.out_of_bounds?
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entries = create(1, 3, 2){}
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assert !entries.out_of_bounds?
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end
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def test_guessing_total_count
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entries = create do |pager|
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# collection is shorter than limit
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pager.replace array
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end
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assert_equal 8, entries.total_entries
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entries = create(2, 5, 10) do |pager|
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# collection is shorter than limit, but we have an explicit count
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pager.replace array
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end
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assert_equal 10, entries.total_entries
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entries = create do |pager|
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# collection is the same as limit; we can't guess
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pager.replace array(5)
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end
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assert_equal nil, entries.total_entries
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entries = create do |pager|
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# collection is empty; we can't guess
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pager.replace array(0)
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end
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assert_equal nil, entries.total_entries
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entries = create(1) do |pager|
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# collection is empty and we're on page 1,
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# so the whole thing must be empty, too
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pager.replace array(0)
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end
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assert_equal 0, entries.total_entries
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end
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def test_invalid_page
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bad_inputs = [0, -1, nil, '', 'Schnitzel']
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bad_inputs.each do |bad|
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assert_raise(WillPaginate::InvalidPage) { create bad }
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end
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end
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def test_invalid_per_page_setting
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assert_raise(ArgumentError) { create(1, -1) }
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end
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def test_page_count_was_removed
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assert_raise(NoMethodError) { create.page_count }
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# It's `total_pages` now.
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end
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private
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def create(page = 2, limit = 5, total = nil, &block)
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if block_given?
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WillPaginate::Collection.create(page, limit, total, &block)
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else
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WillPaginate::Collection.new(page, limit, total)
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end
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end
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def array(size = 3)
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Array.new(size)
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end
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end
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