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(error, 'Hello World')))
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(error, '%s to the %s', 'Welcome', 'Errors')))
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(error)))
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(error.internal, 'World Hello')))
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(error.internal, error, 'André the Giant')))
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(func_a)))
end)

SUITE:addTest('Internal includes the stack 2', function()
	local func_a = function()  error.internal 'Thomas the Steam Train'  end
	local func_b = function()  return 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(func_a)))
end)

--------------------------------------------------------------------------------
-- 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(func_b)))
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(func_c)))
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(func_c)))
end)

--------------------------------------------------------------------------------
-- 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)

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

return SUITE