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-rw-r--r--tools/generate_format_spec.lua49
1 files changed, 49 insertions, 0 deletions
diff --git a/tools/generate_format_spec.lua b/tools/generate_format_spec.lua
new file mode 100644
index 00000000..66b68079
--- /dev/null
+++ b/tools/generate_format_spec.lua
@@ -0,0 +1,49 @@
+local format = require"util.format".format;
+local dump = require "util.serialization".new("oneline")
+local types = {
+ "nil";
+ "boolean";
+ "number";
+ "string";
+ "function";
+ -- "userdata";
+ "thread";
+ "table";
+};
+local example_values = {
+ ["nil"] = { n = 1; nil };
+ ["boolean"] = { true; false };
+ ["number"] = { 97, -12345, 1.5; 73786976294838206464, math.huge, 2147483647 };
+ ["string"] = { "hello", "foo \1\2\3 bar", "nödåtgärd", string.sub("nödåtgärd", 1, -4) };
+ ["function"] = { function() end };
+ -- ["userdata"] = {};
+ ["thread"] = { coroutine.create(function() end) };
+ ["table"] = { {} };
+};
+local example_strings = setmetatable({
+ ["nil"] = { "nil" };
+ ["function"] = { "function() end" };
+ ["number"] = { "97", "-12345", "1.5"; "73786976294838206464", "math.huge", "2147483647" };
+ ["thread"] = { "coroutine.create(function() end)" };
+}, { __index = function() return {} end });
+for _, lua_type in ipairs(types) do
+ print(string.format("\t\tdescribe(\"%s\", function ()", lua_type));
+ local examples = example_values[lua_type];
+ for fmt in ("cdiouxXaAeEfgGqs"):gmatch(".") do
+ print(string.format("\t\t\tdescribe(\"to %%%s\", function ()", fmt));
+ print("\t\t\t\tit(\"works\", function ()");
+ for i=1, examples.n or #examples do
+ local example = examples[i];
+ if not tostring(example):match("%w+: 0[xX]%x+") then
+ print(string.format("\t\t\t\t\tassert.equal(%q, format(%q, %s))", format("%"..fmt, example), "%" .. fmt, example_strings[lua_type][i] or dump(example)));
+ else
+ print(string.format("\t\t\t\t\tassert.matches(\"[%s: 0[xX]%%x+]\", format(%q, %s))", lua_type, "%" .. fmt, example_strings[lua_type][i] or dump(example)));
+ end
+ end
+ print("\t\t\t\tend);");
+ print("\t\t\tend);");
+ print()
+ end
+ print("\t\tend);");
+ print()
+end