spec/util_argparse_spec.lua
author Matthew Wild <mwild1@gmail.com>
Tue, 11 Oct 2022 11:37:55 +0100
changeset 12767 d26eefe98d09
parent 12481 cc84682b8429
child 13164 4ee9a912ceea
permissions -rw-r--r--
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.

describe("parse", function()
	local parse
	setup(function() parse = require"util.argparse".parse; end);

	it("works", function()
		-- basic smoke test
		local opts = parse({ "--help" });
		assert.same({ help = true }, opts);
	end);

	it("returns if no args", function() assert.same({}, parse({})); end);

	it("supports boolean flags", function()
		local opts, err = parse({ "--foo"; "--no-bar" });
		assert.falsy(err);
		assert.same({ foo = true; bar = false }, opts);
	end);

	it("consumes input until the first argument", function()
		local arg = { "--foo"; "bar"; "--baz" };
		local opts, err = parse(arg);
		assert.falsy(err);
		assert.same({ foo = true, "bar", "--baz" }, opts);
		assert.same({ "bar"; "--baz" }, arg);
	end);

	it("expands short options", function()
		local opts, err = parse({ "--foo"; "-b" }, { short_params = { b = "bar" } });
		assert.falsy(err);
		assert.same({ foo = true; bar = true }, opts);
	end);

	it("supports value arguments", function()
		local opts, err = parse({ "--foo"; "bar"; "--baz=moo" }, { value_params = { foo = true; bar = true } });
		assert.falsy(err);
		assert.same({ foo = "bar"; baz = "moo" }, opts);
	end);

	it("demands values for value params", function()
		local opts, err, where = parse({ "--foo" }, { value_params = { foo = true } });
		assert.falsy(opts);
		assert.equal("missing-value", err);
		assert.equal("--foo", where);
	end);

	it("reports where the problem is", function()
		local opts, err, where = parse({ "-h" });
		assert.falsy(opts);
		assert.equal("param-not-found", err);
		assert.equal("-h", where, "returned where");
	end);

end);