errors/test/test_errors.lua

local SUITE = require 'TestSuite' 'errors'

SUITE:setEnviroment {
	error = require 'errors' 'test_errors'
}

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-- Basic errors functions

SUITE:addTest('Basic error', function()
	local expected_error = './test/test_errors.lua:'..curline(1)..': [test_errors]: Hello World'
	assert_equal(expected_error, select(2, pcall(function() error 'Hello World'  end)))
end)

SUITE:addTest('Basic formatting', function()
	local expected_error = './test/test_errors.lua:'..curline(1)..': [test_errors]: Welcome to the Errors'
	assert_equal(expected_error, select(2, pcall(function() error('%s to the %s', 'Welcome', 'Errors') end)))
end)

SUITE:addTest('Default generic error', function()
	local expected_error = './test/test_errors.lua:'..curline(1)..': [test_errors]: Unknown error occured'
	assert_equal(expected_error, select(2, pcall(function() error()  end)))
end)

SUITE:addTest('Internal is almost the same as error in itself', function()
	local expected_error = './test/test_errors.lua:'..curline(1)..': [test_errors/internal]: World Hello'
	assert_equal(expected_error, select(2, pcall(function() error.internal 'World Hello' end)))
end)

SUITE:addTest('Internal can also be called using object index', function()
	local expected_error = './test/test_errors.lua:'..curline(1)..': [test_errors/internal]: André the Giant'
	assert_equal(expected_error, select(2, pcall(function() error:internal 'André the Giant' end)))
end)

SUITE:addTest('Internal includes the stack', function()
	local func_a = function()  error.internal 'Thomas the Steam Train'  end
	local expected_error = './test/test_errors.lua:'..curline(-1)..': [test_errors/internal]: Thomas the Steam Train'
	assert_equal(expected_error, select(2, pcall(function()  func_a()  end)))
end)

SUITE:addTest('Internal includes the stack 2', function()
	local func_a = function()  error.internal 'Thomas the Steam Train'  end
	local func_b = function()  pcall(func_a)  end
	local expected_error = './test/test_errors.lua:'..curline(-2)..': [test_errors/internal]: Thomas the Steam Train'
	assert_equal(expected_error, select(2, pcall(function()  func_a()  end)))
end)

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-- External

SUITE:addTest('External errors hides the stack', function()
	local func_a = function ()  error.external 'Hello World'  end
	local func_b = function ()  func_a()  end
	error.register(func_a)

	local expected_error = './test/test_errors.lua:'..curline(-3)..': [test_errors]: Hello World'
	assert_equal(expected_error, select(2, pcall(function() func_b()  end)))
end)

SUITE:addTest('External errors can be triggered deep', function()
	local func_a = function ()  error.external 'Hello World'  end
	local func_b = function ()  func_a()  end
	local func_c = function ()  func_b()  end
	error.register(func_a, func_b)

	local expected_error = './test/test_errors.lua:'..curline(-3)..': [test_errors]: Hello World'
	assert_equal(expected_error, select(2, pcall(function() func_c()  end)))
end)

SUITE:addTest('Internal errors don\'t hide the stack', function()
	local func_a = function ()  error.internal 'Hello World'  end
	local func_b = function ()  func_a()  end
	local func_c = function ()  func_b()  end
	error.register(func_a, func_b)

	local expected_error = './test/test_errors.lua:'..curline(-5)..': [test_errors/internal]: Hello World'
	assert_equal(expected_error, select(2, pcall(function()  func_c()  end)))
end)

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-- Correcting errors

SUITE:addTest('Correct errors helps with autocorrection', function()
	local _, err_msg = pcall(error.correct, 'Not %s, maybe: %s', 'help', {'Help', 'whelp', 'halp'})
	local expected_error = './test/test_errors.lua:'..curline(-1)..': [test_errors]: Not help, maybe: Help, whelp or halp'
	assert_equal(expected_error, err_msg)
end)

SUITE:addTest('Correct errors has nice default string', function()
	local _, err_msg = pcall(error.correct, 'Vlard', {'Vlad', 'Question Mark', 'Frankenstein'})
	local expected_error = './test/test_errors.lua:'..curline(-1)..': [test_errors]: Unexpected input "Vlard", maybe you meant Vlad, Question Mark or Frankenstein?'
	assert_equal(expected_error, err_msg)
end)

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-- Strict table

SUITE:addTest('Strict tables can be accessed normally', function()
	local t   =  error.strict_table { a = 1, b = 2, c = 3 }
	assert_equal(t.a, 1)
	assert_equal(t.b, 2)
	assert_equal(t.c, 3)
end)

SUITE:addTest('Strict tables with number keys works as well', function()
	local t   =  error.strict_table { 'hi', 'hello', 'world' }
	assert_equal(t[1], 'hi')
	assert_equal(t[2], 'hello')
	assert_equal(t[3], 'world')
end)

SUITE:addTest('Strict tables throw errors on unknown indices', function()
	local t   =  error.strict_table { a = 1, b = 2, c = 3 }
	bad_call(function() return t.hello end)
end)

SUITE:addTest('Strict tables throw errors on unknown indices, even if table contains number keys', function()
	local t   =  error.strict_table { 'hi', 'hello', 'world', aa = 1, ab = 2, ac = 3 }
	local msg = bad_call(function() return t.a end)
	assert_equal('[test_errors]: Cannot index unknown key a, maybe you meant ac, aa or ab?', msg)
end)

SUITE:addTest('Strict tables throw specific error on empty table', function()
	local t   =  error.strict_table {}
	bad_call(function() return t.hello end)
end)

SUITE:addTest('Strict tables throws error on indexing strings in sequence', function()
	local t   =  error.strict_table { 'turing', 'church', 'ada', 'hopper' }
	local msg = bad_call(function() return t.hello end)
	assert_equal('./test/test_errors.lua:'..curline(-1)..': [test_errors]: Cannot index string hello, for sequence with length 4.', msg)
end)

SUITE:addTest('Strict tables throws error on sequence under-access', function()
	local t   =  error.strict_table { 'turing', 'church', 'ada', 'hopper' }
	local msg = bad_call(function() return t[0] end)
	assert_equal('./test/test_errors.lua:'..curline(-1)..': [test_errors]: Cannot index integer 0, for sequence with length 4.', msg)
end)

SUITE:addTest('Strict tables throws error on sequence over-access', function()
	local t   =  error.strict_table { 'turing', 'church', 'ada', 'hopper' }
	local msg = bad_call(function() return t[7] end)
	assert_equal('./test/test_errors.lua:'..curline(-1)..': [test_errors]: Cannot index integer 7, for sequence with length 4.', msg)
end)

SUITE:addTest('Strict tables throws error when indexing non-integer in sequence', function()
	local t   =  error.strict_table { 'turing', 'church', 'ada', 'hopper' }
	local msg = bad_call(function() return t[2.5] end)
	assert_equal('./test/test_errors.lua:'..curline(-1)..': [test_errors]: Cannot index non-integer 2.5, for sequence with length 4.', msg)
end)

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SUITE:addTest('Strict global bad key', function()
    local glob = { require = require, print = print }
          glob._G = glob
    local f = setfenv(function()
              print(_G)
        local error = require 'errors' 'test_strict_global'
              error.enable_strict_globals()
        local a = some_global
    end, glob)
    local _, msg = pcall(f)
	assert_equal('./test/test_errors.lua:'..curline(-3)..': [test_strict_global]: Attempting to access unknown global: \'some_global\'. Perhaps you meant _G, require or print?', msg)
end)

SUITE:addTest('Strict global bad insert', function()
    local glob = { require = require }
          glob._G = glob
    local f = setfenv(function()
        local error = require 'errors' 'test_strict_global'
              error.enable_strict_globals()
        some_global = "hello"
    end, glob)
    local _, msg = pcall(f)
	assert_equal('./test/test_errors.lua:'..curline(-3)..': [test_strict_global]: Attempting to create new global \'some_global\' with value: hello. Perhaps you misspelled _G or require?', msg)
end)

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return SUITE