Mercurial > prosody-modules

annotate mod_auth_token/mock.lua @ 4537:53ee391ca689

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mod_smacks: Fix traceback due to session being destroyed in send() Sending something can cause the OS to notice that the connection is dead and then the connection can be dead at this point. More likely if opportunistic_writes is enabled.
author Kim Alvefur <zash@zash.se>
date Thu, 01 Apr 2021 11:35:26 +0200
parents d0ca211e1b0e
children
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1 -- Source code taken from https://github.com/britzl/deftest
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2 -- Released under the MIT License. Copyright (c) 2009-2012 Norman Clarke.
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3
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4 --- Provides the ability to mock any module.
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5
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6 -- @usage
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7 --
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8 -- mock.mock(sys)
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9 --
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10 -- -- specifying return values
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11 -- sys.get_sys_info.returns({my_data})
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12 -- ...
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13 -- local sys_info = sys.get_sys_info() -- will be my_data
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14 -- assert(sys.get_sys_info.calls == 1) -- call counting
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15 -- ...
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16 -- local sys_info = sys.get_sys_info() -- original response as we are now out of mocked answers
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17 -- assert(sys.get_sys_info.calls == 2) -- call counting
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18 -- ...
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19 --
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20 -- -- specifying a replacement function
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21 -- sys.get_sys_info.replace(function () return my_data end)
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22 --
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23 -- ...
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24 -- local sys_info = sys.get_sys_info() -- will be my_data
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25 -- assert(sys.get_sys_info.calls == 3) -- call counting
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26 -- ...
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27 -- local sys_info = sys.get_sys_info() -- will still be my_data
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28 -- assert(sys.get_sys_info.calls == 4) -- call counting
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29 -- ...
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30 --
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31 -- -- cleaning up
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32 -- mock.unmock(sys) -- restore the sys library again
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33
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34 local mock = {}
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35
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36 --- Mock the specified module.
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37 -- Mocking the module extends the functions it contains with the ability to have their logic overridden.
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38 -- @param module module to mock
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39 -- @usage
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40 --
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41 -- -- mock module x
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42 -- mock.mock(x)
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43 --
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44 -- -- make x.f return 1, 2 then the original value
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45 -- x.f.returns({1, 2})
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46 -- print(x.f()) -- prints 1
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47 --
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48 -- -- make x.f return 1 forever
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49 -- x.f.replace(function () return 1 end)
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50 -- while true do print(x.f()) end -- prints 1 forever
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51 --
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52 -- -- counting calls
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53 -- assert(x.f.calls > 0)
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54 --
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55 -- -- return to original state of module x
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56 -- mock.unmock(x)
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57 --
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58 function mock.mock(module)
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59 assert(module, "You must provide a module to mock")
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60 for k,v in pairs(module) do
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61 if type(v) == "function" then
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62 local mock_fn = {
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63 calls = 0,
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64 answers = {},
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65 repl_fn = nil,
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66 orig_fn = v,
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67 params = {}
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68 }
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69 function mock_fn.returns(...)
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70 local arg_length = select("#", ...)
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71 assert(arg_length > 0, "You must provide some answers")
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72 local args = { ... }
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73 if arg_length == 1 then
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74 mock_fn.answers = args[1]
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75 else
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76 mock_fn.answers = args
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77 end
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78 end
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79 function mock_fn.always_returns(answer)
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80 mock_fn.repl_fn = function()
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81 return answer
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82 end
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83 end
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84 function mock_fn.replace(repl_fn)
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85 mock_fn.repl_fn = repl_fn
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86 end
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87 function mock_fn.original(...)
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88 return mock_fn.orig_fn(...)
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89 end
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90 function mock_fn.restore()
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91 mock_fn.repl_fn = nil
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92 end
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93 local mt = {
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94 __call = function (mock_fn, ...)
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95 mock_fn.calls = mock_fn.calls + 1
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96 local arg = {...}
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97
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98 if #arg > 0 then
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99 for i=1,#arg do
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100 mock_fn.params[i] = arg[i]
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101 end
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102 end
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103
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104 if mock_fn.answers[1] then
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105 local result = mock_fn.answers[1]
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106 table.remove(mock_fn.answers, 1)
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107 return result
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108 elseif mock_fn.repl_fn then
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109 return mock_fn.repl_fn(...)
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110 else
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111 return v(...)
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112 end
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113 end
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114 }
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115 setmetatable(mock_fn, mt)
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116 module[k] = mock_fn
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117 end
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118 end
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119 end
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120
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121 --- Remove the mocking capabilities from a module.
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122 -- @param module module to remove mocking from
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123 function mock.unmock(module)
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124 assert(module, "You must provide a module to unmock")
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125 for k,v in pairs(module) do
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126 if type(v) == "table" then
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127 if v.orig_fn then
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128 module[k] = v.orig_fn
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129 end
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130 end
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131 end
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132 end
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133
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134 return mock