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Diffstat (limited to '')
| -rw-r--r-- | test/lua/unit/fpconv.lua | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/test/lua/unit/fpconv.lua b/test/lua/unit/fpconv.lua new file mode 100644 index 0000000..e64626f --- /dev/null +++ b/test/lua/unit/fpconv.lua @@ -0,0 +1,97 @@ +-- fpconv tests + +context("Fpconv printf functions", function() + local ffi = require("ffi") + local niter_fuzz = 100000 + local function small_double() + return math.random() + end + local function large_double() + return math.random() * math.random(2^52) + end + local function huge_double() + return math.random(2^52) * math.random(2^52) + end + local function tiny_double() + return math.random() / math.random(2^52) + end + ffi.cdef[[ +int snprintf(char *str, size_t size, const char *format, ...); +long rspamd_snprintf(char *str, size_t size, const char *format, ...); +long rspamd_printf(const char *format, ...); +]] + local benchmarks = { + {'tiny fixed', small_double, '%f'}, + {'small fixed', tiny_double, '%f'}, + {'large fixed', large_double, '%.3f'}, + {'huge fixed', huge_double, '%.3f'}, + {'tiny scientific', small_double, '%g'}, + {'small scientific', tiny_double, '%g'}, + {'large scientific', large_double, '%g'}, + {'huge scientific', huge_double, '%g'}, + } + + local generic = { + {0, '%f', '0'}, + {0, '%.1f', '0.0'}, + {0, '%.2f', '0.00'}, + {0, '%.32f', '0.000000000000000000000000000'}, -- max + {0, '%.150f', '0.000000000000000000000000000'}, -- too large + {1/3, '%f', '0.3333333333333333'}, + {1/3, '%.1f', '0.3'}, + {1/3, '%.2f', '0.33'}, + {-1/3, '%.32f', '-0.333333333333333300000000000'}, + {-1/3, '%.150f', '-0.333333333333333300000000000'}, + {-3.6817595395344857e-68, '%f', '-3.6817595395344857e-68'}, + {3.5844466002796428e+298, '%f', '3.5844466002796428e+298'}, + {9223372036854775808, '%f', '9223372036854776000'}, -- 2^63 with precision lost + {2^50 + 0.2, '%f', '1125899906842624.3'}, -- 2^50 with precision lost + {2^50 + 0.2, '%.2f', '1125899906842624.30'}, -- 2^50 with precision lost + {-3.6817595395344857e-68, '%.3f', '-0.000'}, -- not enough precision + {3.5844466002796428e+298, '%.3f', '3.5844466002796428e+298'}, + {9223372036854775808, '%.3f', '9223372036854776000.000'}, -- 2^63 with precision lost + {math.huge, '%f', 'inf'}, + {-math.huge, '%f', '-inf'}, + {0.0/0.0, '%f', 'nan'}, + {math.huge, '%.1f', 'inf'}, + {-math.huge, '%.2f', '-inf'}, + {0.0/0.0, '%.3f', 'nan'}, + {math.huge, '%g', 'inf'}, + {-math.huge, '%g', '-inf'}, + {0.0/0.0, '%g', 'nan'}, + } + + local buf = ffi.new("char[64]") + local buf2 = ffi.new("char[64]") + + for i,c in ipairs(generic) do + test("Generic fp test fmt: " .. c[2] .. '; ' .. tostring(c[1]), function() + ffi.C.rspamd_snprintf(buf, 64, c[2], c[1]) + local sbuf = ffi.string(buf) + assert_equal(sbuf, c[3], c[3] .. " but test returned " .. sbuf) + end) + end + if os.getenv("RSPAMD_LUA_EXPENSIVE_TESTS") then + for _,c in ipairs(benchmarks) do + test("Fuzz fp test " .. c[1], function() + for _=1,niter_fuzz do + local sign = 1 + if math.random() > 0.5 then + sign = -1 + end + local d = c[2]() * sign + ffi.C.snprintf(buf, 64, c[3], d) + ffi.C.rspamd_snprintf(buf2, 64, c[3], d) + + local sbuf = ffi.string(buf) + local sbuf2 = ffi.string(buf2) + + assert_less_than(math.abs(d - tonumber(sbuf2))/math.abs(d), + 0.00001, + string.format('rspamd emitted: %s, libc emitted: %s, original number: %g', + sbuf2, sbuf, d)) + end + end) + end + end +end)
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