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local p_scroller = require('telescope.pickers.scroller')
local eq = assert.are.same
describe('scroller', function()
local max_results = 10
describe('ascending cycle', function()
local cycle_scroller = p_scroller.create('cycle', 'ascending')
it('should return values within the max results', function()
eq(5, cycle_scroller(max_results, max_results, 5))
end)
it('should return 0 at 0', function()
eq(0, cycle_scroller(max_results, max_results, 0))
end)
it('should cycle you to the top when you go below 0', function()
eq(max_results - 1, cycle_scroller(max_results, max_results, -1))
end)
it('should cycle you to 0 when you go past the results', function()
eq(0, cycle_scroller(max_results, max_results, max_results + 1))
end)
it('should cycle when current results is less than max_results', function()
eq(0, cycle_scroller(max_results, 5, 7))
end)
end)
describe('ascending limit', function()
local limit_scroller = p_scroller.create('limit', 'ascending')
it('should return values within the max results', function()
eq(5, limit_scroller(max_results, max_results, 5))
end)
it('should return 0 at 0', function()
eq(0, limit_scroller(max_results, max_results, 0))
end)
it('should not cycle', function()
eq(0, limit_scroller(max_results, max_results, -1))
end)
it('should not cycle you to 0 when you go past the results', function()
eq(max_results - 1, limit_scroller(max_results, max_results, max_results + 1))
end)
it('should stay at current results when current results is less than max_results', function()
local current = 5
eq(current - 1, limit_scroller(max_results, current, 7))
end)
end)
describe('descending cycle', function()
local cycle_scroller = p_scroller.create('cycle', 'descending')
it('should return values within the max results', function()
eq(5, cycle_scroller(max_results, max_results, 5))
end)
it('should return max_results - 1 at 0', function()
eq(0, cycle_scroller(max_results, max_results, 0))
end)
it('should cycle you to the bot when you go below 0', function()
eq(max_results - 1, cycle_scroller(max_results, max_results, -1))
end)
it('should cycle you to 0 when you go past the results', function()
eq(0, cycle_scroller(max_results, max_results, max_results + 1))
end)
it('should cycle when current results is less than max_results', function()
eq(9, cycle_scroller(max_results, 5, 4))
end)
end)
describe('descending limit', function()
local limit_scroller = p_scroller.create('limit', 'descending')
it('should return values within the max results', function()
eq(5, limit_scroller(max_results, max_results, 5))
end)
it('should return 0 at 0', function()
eq(0, limit_scroller(max_results, max_results, 0))
end)
it('should not cycle', function()
eq(0, limit_scroller(max_results, max_results, -1))
end)
it('should not cycle you to 0 when you go past the results', function()
eq(max_results - 1, limit_scroller(max_results, max_results, max_results + 1))
end)
it('should stay at current results when current results is less than max_results', function()
local current = 5
eq(current - 1, limit_scroller(max_results, current, 4))
end)
end)
end)
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