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annotate spec/util_debug_spec.lua @ 12763:d26eefe98d09

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util.dbuffer: Add efficient shortcuts for discard() in certain cases If the buffer is already empty, nothing to do. If we're throwing away the whole buffer, we can just empty it and avoid read_chunk() (which in turn may collapse()). These shortcuts are much more efficient.
author Matthew Wild <mwild1@gmail.com>
date Tue, 11 Oct 2022 11:37:55 +0100
parents 37dc2a6144d1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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37dc2a6144d1 util.debug: Fix locals being reported under wrong stack frame in some cases (+tests!!)
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1 local dbg = require "util.debug";
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2
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3 describe("util.debug", function ()
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4 describe("traceback()", function ()
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5 it("works", function ()
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6 local tb = dbg.traceback();
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7 assert.is_string(tb);
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8 end);
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9 end);
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10 describe("get_traceback_table()", function ()
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11 it("works", function ()
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12 local count = 0;
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13 -- MUST stay in sync with the line numbers of these functions:
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14 local f1_defined, f3_defined = 43, 15;
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15 local function f3(f3_param) --luacheck: ignore 212/f3_param
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16 count = count + 1;
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17
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18 for i = 1, 2 do
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19 local tb = dbg.get_traceback_table(i == 1 and coroutine.running() or nil, 0);
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20 assert.is_table(tb);
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21 --print(dbg.traceback(), "\n\n\n", require "util.serialization".serialize(tb, { fatal = false, unquoted = true}));
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22 local found_f1, found_f3;
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23 for _, frame in ipairs(tb) do
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24 if frame.info.linedefined == f1_defined then
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25 assert.equal(0, #frame.locals);
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26 assert.equal("f2", frame.upvalues[1].name);
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27 assert.equal("f1_upvalue", frame.upvalues[2].name);
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28 found_f1 = true;
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29 elseif frame.info.linedefined == f3_defined then
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30 assert.equal("f3_param", frame.locals[1].name);
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31 found_f3 = true;
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32 end
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33 end
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34 assert.is_true(found_f1);
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35 assert.is_true(found_f3);
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36 end
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37 end
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38 local function f2()
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39 local f2_local = "hello";
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40 return f3(f2_local);
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41 end
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42 local f1_upvalue = "upvalue1";
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43 local function f1()
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44 f2(f1_upvalue);
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45 end
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46
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47 -- ok/err are caught and re-thrown so that
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48 -- busted gets to handle them in its own way
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49 local ok, err;
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50 local function hook()
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51 debug.sethook();
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52 ok, err = pcall(f1);
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53 end
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54
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55 -- Test the traceback is correct in various
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56 -- types of caller environments
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57
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58 -- From a Lua hook
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59 debug.sethook(hook, "crl", 1);
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60 local a = string.sub("abcdef", 3, 4);
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61 assert.equal("cd", a);
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62 debug.sethook();
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63 assert.equal(1, count);
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64
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65 if not ok then
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66 error(err);
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67 end
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68 ok, err = nil, nil;
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69
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70 -- From a signal handler (C hook)
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71 require "util.signal".signal("SIGUSR1", hook);
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72 require "util.signal".raise("SIGUSR1");
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73 assert.equal(2, count);
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74
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75 if not ok then
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76 error(err);
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77 end
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78 ok, err = nil, nil;
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79
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80 -- Inside a coroutine
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81 local co = coroutine.create(function ()
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82 hook();
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83 end);
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84 coroutine.resume(co);
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85
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86 if not ok then
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87 error(err);
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88 end
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89
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90 assert.equal(3, count);
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91 end);
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92 end);
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93 end);