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local permute = require("pl.permute")
local tcopy = require("pl.tablex").copy
local utils = require("pl.utils")
describe("pl.permute", function()
describe("order_iter", function()
it("returns all order combinations", function()
local result = {}
for list in permute.order_iter({"one", "two", "three"}) do
result[#result+1] = tcopy(list)
end
assert.same({
[1] = {
[1] = 'two',
[2] = 'three',
[3] = 'one' },
[2] = {
[1] = 'three',
[2] = 'two',
[3] = 'one' },
[3] = {
[1] = 'three',
[2] = 'one',
[3] = 'two' },
[4] = {
[1] = 'one',
[2] = 'three',
[3] = 'two' },
[5] = {
[1] = 'two',
[2] = 'one',
[3] = 'three' },
[6] = {
[1] = 'one',
[2] = 'two',
[3] = 'three' } }, result)
end)
it("returns nil on empty list", function()
local result = {}
for list in permute.order_iter({}) do
result[#result+1] = tcopy(list)
end
assert.equal(0, #result)
end)
end)
describe("order_table", function()
it("returns all order combinations", function()
local result = permute.order_table({"one", "two", "three"})
assert.same({
[1] = {
[1] = 'two',
[2] = 'three',
[3] = 'one' },
[2] = {
[1] = 'three',
[2] = 'two',
[3] = 'one' },
[3] = {
[1] = 'three',
[2] = 'one',
[3] = 'two' },
[4] = {
[1] = 'one',
[2] = 'three',
[3] = 'two' },
[5] = {
[1] = 'two',
[2] = 'one',
[3] = 'three' },
[6] = {
[1] = 'one',
[2] = 'two',
[3] = 'three' } }, result)
end)
it("returns empty table on empty input list", function()
local result = permute.order_table({})
assert.same({}, result)
end)
end)
describe("list_iter", function()
it("returns all combinations from sub-lists", function()
local result = {}
local strs = {"one", "two", "three"}
local ints = { 1,2,3 }
local bools = { true, false }
for count, str, int, bool in permute.list_iter(strs, ints, bools) do
result[#result+1] = {count, str, int, bool}
end
assert.same({
[1] = {1, 'one', 1, true },
[2] = {2, 'two', 1, true },
[3] = {3, 'three', 1, true },
[4] = {4, 'one', 2, true },
[5] = {5, 'two', 2, true },
[6] = {6, 'three', 2, true },
[7] = {7, 'one', 3, true },
[8] = {8, 'two', 3, true },
[9] = {9, 'three', 3, true },
[10] = {10, 'one', 1, false },
[11] = {11, 'two', 1, false },
[12] = {12, 'three', 1, false },
[13] = {13, 'one', 2, false },
[14] = {14, 'two', 2, false },
[15] = {15, 'three', 2, false },
[16] = {16, 'one', 3, false },
[17] = {17, 'two', 3, false },
[18] = {18, 'three', 3, false },
}, result)
end)
it("is nil-safe, given 'n' is set", function()
local result = {}
local bools = utils.pack(nil, true, false)
local strs = utils.pack("one", "two", nil)
for count, bool, str in permute.list_iter(bools, strs) do
result[#result+1] = {count, bool, str}
end
assert.same({
[1] = {1, nil, 'one' },
[2] = {2, true, 'one' },
[3] = {3, false, 'one' },
[4] = {4, nil, 'two' },
[5] = {5, true, 'two' },
[6] = {6, false, 'two' },
[7] = {7, nil, nil },
[8] = {8, true, nil },
[9] = {9, false, nil },
}, result)
end)
it("returns nil on empty list", function()
local count = 0
for list in permute.list_iter({}) do
count = count + 1
end
assert.equal(0, count)
end)
end)
describe("list_table", function()
it("returns all combinations from sub-lists", function()
local strs = {"one", "two", "three"}
local ints = { 1,2,3 }
local bools = { true, false }
assert.same({
[1] = {'one', 1, true, n = 3 },
[2] = {'two', 1, true, n = 3 },
[3] = {'three', 1, true, n = 3 },
[4] = {'one', 2, true, n = 3 },
[5] = {'two', 2, true, n = 3 },
[6] = {'three', 2, true, n = 3 },
[7] = {'one', 3, true, n = 3 },
[8] = {'two', 3, true, n = 3 },
[9] = {'three', 3, true, n = 3 },
[10] = {'one', 1, false, n = 3 },
[11] = {'two', 1, false, n = 3 },
[12] = {'three', 1, false, n = 3 },
[13] = {'one', 2, false, n = 3 },
[14] = {'two', 2, false, n = 3 },
[15] = {'three', 2, false, n = 3 },
[16] = {'one', 3, false, n = 3 },
[17] = {'two', 3, false, n = 3 },
[18] = {'three', 3, false, n = 3 },
}, permute.list_table(strs, ints, bools))
end)
it("is nil-safe, given 'n' is set", function()
local bools = utils.pack(nil, true, false)
local strs = utils.pack("one", "two", nil)
assert.same({
[1] = {nil, 'one', n = 2 },
[2] = {true, 'one', n = 2 },
[3] = {false, 'one', n = 2 },
[4] = {nil, 'two', n = 2 },
[5] = {true, 'two', n = 2 },
[6] = {false, 'two', n = 2 },
[7] = {nil, nil, n = 2 },
[8] = {true, nil, n = 2 },
[9] = {false, nil, n = 2 },
}, permute.list_table(bools, strs))
end)
it("returns nil on empty list", function()
assert.same({}, permute.list_table({}))
end)
end)
end)
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