pretty/test/test_pretty.lua

local SUITE = require('TestSuite').new('pretty')
SUITE:setEnviroment{
    format  = require('pretty')
}

local ASSERT_ERROR_APPROX = [[
Approximate strings not similar enough:
    Should match: %s
    Gotten:       %s
]]

--------------------------------------------------------------------------------

local HAS_ADV_GETLOCAL = not not debug.getinfo(1, 'u').nparams  -- Lua 5.1 compat
if not loadstring then  loadstring = load  end                  -- Lua 5.3 compat

local function format_test (t)
    if t.longterm     then return  end
    if t.adv_getlocal and not HAS_ADV_GETLOCAL then return  end
    SUITE:addTest(t.expect, function ()
    	local input_value      =  t.input
        local input_options    =  t.options
        local expected_result  =  t.expect
    	local actual_result    =  format(input_value, input_options)
        if not t.approx or type(actual_result) ~= 'string' then
            assert_equal(expected_result, actual_result)
        else
            if not actual_result:match(expected_result) then
                error(ASSERT_ERROR_APPROX:format(expected_result, actual_result))
            end
        end
    end)
end

--------------------------------------------------------------------------------
-- Strings

format_test {
    input  = 'Hello World',
    expect = '\'Hello World\'',
}

format_test {
    input  = 'Hello \'World\'',
    expect = '\"Hello \'World\'\"',
}

format_test {
    input  = 'Hello \"World\"',
    expect = '\'Hello \"World\"\'',
}

format_test {
    input  = 'Hello [[World]]',
    expect = '\'Hello [[World]]\'',
}

format_test {
    input  = '\'Hello\' [[World]]',
    expect = '\"\'Hello\' [[World]]\"',
}

format_test {
    input  = '\'Hello\' \"there\" [[World]]',
    expect = '[=[\'Hello\' \"there\" [[World]]]=]',
}

format_test {
    input  = '\'Hello\' \"there\" [=[World]=]',
    expect = '[[\'Hello\' \"there\" [=[World]=]]]',
}

format_test {
    input  = '\nHello World',
    expect = '\'\\nHello World\'',
}

format_test {
    input  = '\'\"\n',
    expect = '[[\n\'\"\n]]',
}

format_test {
    input  = '\n',
    expect = '\'\\n\'',
}

format_test {
    input  = '\\',
    expect = '\'\\\\\'',
}

format_test {
    input  = '\000',
    expect = '\'\\000\'',
}

format_test {
    input  = '\a\b\v\r\f',
    expect = '\'\\a\\b\\v\\r\\f\'',
}

format_test {
    input  = 'ø',
    expect = '\'ø\'',
}

--------------------------------------------------------------------------------
-- Numbers

format_test {
    input  = 0,
    expect = '0',
}

format_test {
    input  = 2000,
    expect = '2000',
}

format_test {
    input  = -2000,
    expect = '-2000',
}

--------------------------------------------------------------------------------
-- Numbers, Other formats

format_test {
    input  = 10^5,
    expect = '10^5',
}

format_test {
    input  = 10^-6,
    expect = '10^-6',
}

format_test {
    input  = 2^17,
    expect = '2^17',
}

format_test {
    input  = 2^-7,
    expect = '2^-7',
}

format_test {
    input  = 1/3,
    expect = '1/3',
}

format_test {
    input  = 9/17,
    expect = '9/17',
}

format_test {
    input  = math.sqrt(2),
    expect = 'math.sqrt(2)',
}

format_test {
    input  = 1/math.sqrt(2),
    expect = '1/math.sqrt(2)',
}

format_test {
    input  = math.log(2),
    expect = 'math.log(2)',
}

--------------------------------------------------------------------------------
-- Numbers, Constants

format_test {
    input  = math.pi,
    expect = 'math.pi',
}

format_test {
    input  = math.exp(1),
    expect = 'math.exp(1)',
}

format_test {
    input  = 1/0,   -- Same as math.huge
    expect = '1/0',
}

format_test {
    input  = -1/0,   -- Same as -math.huge
    expect = '-1/0',
}

format_test {
    input  = 0/0,   -- Same as nan
    expect = '0/0',
}

format_test {
    input  = 1/0,       -- Same as math.huge
    options = { math_shorthand = true },
    expect = '∞',
}

format_test {
    input  = -1/0,       -- Same as -math.huge
    options = { math_shorthand = true },
    expect = '-∞',
}

format_test {
    input  = 0/0,       -- Same as nan
    options = { math_shorthand = true },
    expect = 'nan',
}

format_test {
    input  = math.pi,
    options = { math_shorthand = true },
    expect = 'π',
}

format_test {
    input  = math.exp(1),
    options = { math_shorthand = true },
    expect = 'e',
}

format_test {
    input  = { 1/2, 1/3, 1/4, 1/5 },
    expect = '{ 1/2, 1/3, 1/4, 1/5 }',
}

--------------------------------------------------------------------------------
-- Primitive types

format_test {
    input  = nil,
    expect = 'nil',
}

format_test {
    input  = true,
    expect = 'true',
}

format_test {
    input  = false,
    expect = 'false',
}

--------------------------------------------------------------------------------
-- Userdata printing

-- TODO. First off figure out a way to test this stuff.
-- Maybe look into using the one available debug.getupvalue(pairs, 1)

--------------------------------------------------------------------------------
-- Thread printing

do
    local suspended_coroutine = coroutine.create(function () end)
    format_test {
        input  = suspended_coroutine,
        approx = true,
        expect = 'suspended coroutine: 0x%x+',
    }
end

do
    local dead_coroutine      = coroutine.create(function () end)
    coroutine.resume(dead_coroutine)
    format_test {
        input  = dead_coroutine,
        approx = true,
        expect = 'dead coroutine: 0x%x+',
    }
end

--------------------------------------------------------------------------------
-- Single-line tables

format_test {
    input  = {},
    expect = '{}',
}

format_test {
    input  = {1, 2, 3},
    expect = '{ 1, 2, 3 }',
}

format_test {
    input  = { 'Hello', 'World' },
    expect = '{ \'Hello\', \'World\' }',
}

format_test {
    input  = { a = 1, b = 2 },
    expect = '{ a = 1, b = 2 }',
}

format_test {
    input  = { __hello = true },
    expect = '{ __hello = true }',
}

format_test {
    input  = { [']]'] = true },
    expect = '{ [\']]\'] = true }',
}

format_test {
    input  = { ['and'] = true },
    expect = '{ [\'and\'] = true }',
}

format_test {
    input  = { [false] = false, [true] = true },
    expect = '{ [false] = false, [true] = true }',
}

format_test {
    input  = { [100] = 'Hi', [300] = 'Hello' },
    expect = '{ [100] = \'Hi\', [300] = \'Hello\' }',
}

format_test { -- Order does not matter
    input  = { b = 1, a = 2 },
    expect = '{ a = 2, b = 1 }',
}

format_test {  -- Can include empty tables
    input  = { {}, {}, {} },
    expect = '{ {}, {}, {} }',
}

format_test {  -- Can include very small tables
    input  = { {1}, {2}, {3} },
    expect = '{ { 1 }, { 2 }, { 3 } }',
}

--------------------------------------------------------------------------------
-- Multi-line tables

format_test {
    input  = { {1, 2, 3}, {4, 5, 6} },
    expect = '{\n\t{ 1, 2, 3 },\n\t{ 4, 5, 6 }\n}',
}

format_test {
    input  = { a = {1, 2, 3}, b = {4, 5, 6} },
    expect = '{\n\ta = { 1, 2, 3 },\n\tb = { 4, 5, 6 }\n}',
}

format_test {
    input  = { 'Hi', [300] = 'Hello' },
    expect = '{\n\t[1]   = \'Hi\',\n\t[300] = \'Hello\'\n}',
}

format_test {
    input  = { { {} } },
    expect = '{\n\t{ {} }\n}',
}

format_test {
    input  = { [{ 1, 2 }] = { 2, 1 } },
    expect = '{\n\t[{ 1, 2 }] = { 2, 1 }\n}',
}

format_test {
    input  = { { {1, 2}, {3, 4} }, {5, 6} },
    expect = '{\n\t{\n\t\t{ 1, 2 },\n\t\t{ 3, 4 }\n\t},\n\t{ 5, 6 }\n}',
}

format_test {
    input   = { { {1, 2}, {3, 4} }, {5, 6} },
    options = { max_depth = 0 },
    expect  = '{...}',
}

format_test {
    input   = { { {1, 2}, {3, 4} }, {5, 6} },
    options = { max_depth = 1 },
    expect  = '{\n\t{...},\n\t{...}\n}',
}

format_test {
    input   = { { {1, 2}, {3, 4} }, {5, 6} },
    options = { max_depth = 2 },
    expect  = '{\n\t{\n\t\t{...},\n\t\t{...}\n\t},\n\t{ 5, 6 }\n}',
}

format_test {
    input   = { { {1, 2}, {3, 4} }, {5, 6} },
    options = { max_depth = 3 },
    expect  = '{\n\t{\n\t\t{ 1, 2 },\n\t\t{ 3, 4 }\n\t},\n\t{ 5, 6 }\n}',
}

format_test {
    input  = { [{ {1,2}, {3,4} }] = 'Hello World' },
    expect = '{\n\t[{...}] = \'Hello World\'\n}',
}

format_test {
    input  = { a = {1,2}, bcdefg = {3,4} },
    expect = '{\n\ta      = { 1, 2 },\n\tbcdefg = { 3, 4 }\n}',
}

format_test {
    input  = { [true] = 1, [1] = false },
    expect = '{\n\t[true] = 1,\n\t[1]    = false\n}',
}

format_test {
    -- Proper indent
    input  = { [1] = 1, ['whatever'] = false },
    expect = '{\n\t[1]          = 1,\n\t[\'whatever\'] = false\n}',
}

format_test {
    -- Table view, with indent.
    input  = { { a = 'hello', b = 'hi' }, { a = 'hi', b = 'hello' } },
    expect = '{\n\t{ a = \'hello\', b = \'hi\'    },\n\t{ a = \'hi\',    b = \'hello\' }\n}',
}

--------------------------------------------------------------------------------
-- Table recursion

do
    local recursive = {}
          recursive[1] = recursive
    format_test {
        input   = recursive,
        options = { max_depth = 5 },
        expect  = '{ {...} }',
    }
    format_test {
      input   = recursive,
      options = { max_depth = 5, recursion = 'ignore' },
      expect  = '{ {...} }',
    }
    format_test {
      input   = recursive,
      options = { max_depth = 5, recursion = 'marked' },
      expect  = '<1>{ <1>{...} }',
    }
end


--------------------------------------------------------------------------------
-- Table Sorting

format_test {
    input  = { 'c', 'b', 'a' },
    expect = '{ \'c\', \'b\', \'a\' }',
}

format_test {
    input  = { a = 1, a1 = 0 },
    expect = '{ a = 1, a1 = 0 }',
}

format_test {
    input  = { a10 = 1, a1 = 0 },
    expect = '{ a1 = 0, a10 = 1 }',
}

format_test {
    input  = { a00 = 0, a1 = 1 },
    expect = '{ a00 = 0, a1 = 1 }',
}

format_test {
    input  = { a = {}, b = true },
    expect = '{ b = true, a = {} }',
}

format_test {
    input  = { a = {}, b = true, b1 = false },
    expect = '{ b = true, b1 = false, a = {} }',
}

format_test {
    input  = { {}, true, false, 5 },
    expect = '{ {}, true, false, 5 }',
}

-- TODO: Add more tests for sorting.

--------------------------------------------------------------------------------
-- CDATA

-- TODO: Add more advanced understanding of cdata.

if type(jit) == 'table' then

    local ffi = require('ffi')
    ffi.cdef[[
        int poll(struct pollfd *fds, unsigned long nfds, int timeout);
    ]]

    format_test {
        input  = ffi.C.poll,
        approx = true,
        expect = 'cdata<.+>: 0x%x+',
    }

    format_test {
        input  = ffi.new('int[10]'),
        approx = true,
        expect = 'cdata<.+>: 0x%x+',
    }
end

--------------------------------------------------------------------------------

return SUITE