util.format: Escape ASCII control characters in output
This should offer some protection against doing evil things to
terminals. Doesn't protect against pure broken UTF-8 garbage however.
See #734
local format = require "util.format".format;
describe("util.format", function()
describe("#format()", function()
it("should work", function()
assert.equal("hello", format("%s", "hello"));
assert.equal("<nil>", format("%s"));
assert.equal("<nil>", format("%d"));
assert.equal("<nil>", format("%q"));
assert.equal(" [<nil>]", format("", nil));
assert.equal("true", format("%s", true));
assert.equal("[true]", format("%d", true));
assert.equal("% [true]", format("%%", true));
assert.equal("{ }", format("%q", { }));
assert.equal("[1.5]", format("%d", 1.5));
assert.equal("[7.3786976294838e+19]", format("%d", 73786976294838206464));
end);
it("escapes ascii control stuff", function ()
assert.equal("␁", format("%s", "\1"));
end);
end);
end);