-- Run this file with testy:
--	  testy.lua tests.lua
-- testy sets `...` to "module.test", so ignore that and use module top-level paths.
package.path = package.path .. ";../?.lua"

local assert = require("batteries.assert")
local tablex = require("batteries.tablex")


-- tablex {{{

local function test_shallow_copy()
	local x,r
	x = { a = 1, b = 2, c = 3 }
	r = tablex.shallow_copy(x)
	assert:equal(r.a, 1)
	assert:equal(r.b, 2)
	assert:equal(r.c, 3)

	x = { a = { b = { 2 }, c = { 3 }, } }
	r = tablex.shallow_copy(x)
	assert:equal(r.a, x.a)
end

local function test_deep_copy()
	local x,r
	x = { a = 1, b = 2, c = 3 }
	r = tablex.deep_copy(x)
	assert:equal(r.a, 1)
	assert:equal(r.b, 2)
	assert:equal(r.c, 3)

	x = { a = { b = { 2 }, c = { 3 }, } }
	r = tablex.deep_copy(x)
	assert(r.a ~= x.a)
	assert:equal(r.a.b[1], 2)
	assert:equal(r.a.c[1], 3)
end


local function test_shallow_overlay()
	local x,y,r
	x = { a = 1, b = 2, c = 3 }
	y = { c = 8, d = 9 }
	r = tablex.shallow_overlay(x, y)
	assert(
		tablex.deep_equal(
			r,
			{ a = 1, b = 2, c = 8, d = 9 }
			)
		)

	x = { b = { 2 }, c = { 3 }, }
	y = { c = { 8 }, d = { 9 }, }
	r = tablex.shallow_overlay(x, y)
	assert(r.b == x.b)
	assert(r.c == y.c)
	assert(r.d == y.d)
	assert(
		tablex.deep_equal(
			r,
			{ b = { 2 }, c = { 8 }, d = { 9 }, }))
end

local function test_deep_overlay()
	local x,y,r
	x = { a = 1, b = 2, c = 3 }
	y = { c = 8, d = 9 }
	r = tablex.deep_overlay(x, y)
	assert(
		tablex.deep_equal(
			r,
			{ a = 1, b = 2, c = 8, d = 9 }))

	x = { a = { b = { 2 }, c = { 3 }, } }
	y = { a = { c = { 8 }, d = { 9 }, } }
	r = tablex.deep_overlay(x, y)
	assert(
		tablex.deep_equal(
			r,
			{ a = { b = { 2 }, c = { 8 }, d = { 9 }, } }))
end


local function test_shallow_equal()
	local x,y
	x = { a = { b = { 2 }, } }
	y = { a = { b = { 2 }, } }
	assert(not tablex.shallow_equal(x, y))

	x = { 3, 4, "hello", [20] = "end", }
	y = { 3, 4, "hello", [20] = "end", }
	assert(tablex.shallow_equal(x, y))

	local z = { 1, 2, }
	x = { a = z, b = 10, c = true, }
	y = { a = z, b = 10, c = true, }
	assert(tablex.shallow_equal(x, y))
	assert(tablex.shallow_equal(y, x))
end

local function test_deep_equal()
	local x,y
	x = { a = { b = { 2 }, c = { 3 }, } }
	y = { a = { b = { 2 }, c = { 3 }, } }
	assert(tablex.deep_equal(x, y))

	x = { a = { b = { 1, 2 }, c = { 3 }, } }
	y = { a = { c = { 3 }, b = { [2] = 2, [1] = 1 }, } }
	assert(tablex.deep_equal(x, y))
	assert(tablex.deep_equal(y, x))

	x = { a = { b = { 2 }, c = { 3 }, 2 } }
	y = { a = { b = { 2 }, c = { 3 }, } }
	assert(not tablex.deep_equal(x, y))
	assert(not tablex.deep_equal(y, x))
end