local parser = require "headers.parser"


describe("Scheme", function()
	local headers

	before_each(function()
		headers = parser.new()
	end)

	it("version one is supported", function()
		assert.has_no.errors(function()
			headers:parse [[scheme "headers/1"]]
		end)
	end)

	it("is not required", function()
		assert.has_no.errors(function()
			headers:parse ""
		end)
	end)
end)


describe("Tags", function()
	local headers

	before_each(function()
		headers = parser.new()
	end)

	it("can be created with aliases definition without actual aliases", function()
		headers:parse [[aliases "Example"]]
		assert.are.same({"Example"}, headers:get_tags())
	end)

	it("can be created with aliases definition", function()
		headers:parse [[aliases "Example" {"Alias for Example"}]]
		assert.are.same({"Example"}, headers:get_tags())
	end)

	it("can be created with headers definition", function()
		headers:parse [[headers "Example" {"example.h"}]]
		assert.are.same({"Example"}, headers:get_tags())
	end)
end)


describe("Headers", function()
	local headers

	before_each(function()
		headers = parser.new()
	end)

	it("are not available if never assigned", function()
		headers:parse [[]]
		assert.is_nil(headers:get_headers{"Example"})
	end)

	it("can be assigned to a tag", function()
		headers:parse [[headers "Example" {"example.h"}]]
		assert.are.same({"example.h"}, headers:get_headers{"Example"})
	end)

	it("can be included from another tag", function()
		headers:parse [[
			headers "Parent" {"example.h"}
			headers "Derived" {include "Parent"}
		]]
		assert.are.same({"example.h"}, headers:get_headers{"Derived"})
	end)

	it("can be removed after including from another tag", function()
		headers:parse [[
			headers "Parent" {"example.h", "removed.h"}
			headers "Derived" {include "Parent", remove "removed.h"}
		]]
		assert.are.same({"example.h"}, headers:get_headers{"Derived"})
	end)

	it("can be retrieved from number of tags", function()
		headers:parse [[
			headers "First" {"first.h"}
			headers "Second" {"second.h"}
		]]
		assert.are.same({"first.h"}, headers:get_headers{"First"})
		assert.are.same({"first.h", "second.h"}, headers:get_headers{"First", "Second"})
	end)
end)