local activity = require "activity"

describe("Days in a year", function()
	it("should support regular years", function()
		assert.are.equal(365, activity.days(1970))
		assert.are.equal(365, activity.days(2001))
	end)

	it("should support lean years", function()
		assert.are.equal(366, activity.days(2004))
		assert.are.equal(366, activity.days(1980))
	end)

	it("should support *00 years", function()
		assert.are.equal(366, activity.days(2000))
		assert.are.equal(365, activity.days(2100))
		assert.are.equal(365, activity.days(2200))
		assert.are.equal(365, activity.days(2300))
		assert.are.equal(366, activity.days(2400))
	end)
end)

describe("This year is", function()
	local this_year = os.date "%Y"  -- Quite useless test

	it(tostring(this_year), function()
		assert.are.equal(this_year, activity.this_year())
	end)
end)

describe("First week day of", function()
	it("2023 is Sunday", function()
		assert.are.equal(1, activity.first_week_day(2023))
	end)

	it("2022 is Saturday", function()
		assert.are.equal(7, activity.first_week_day(2022))
	end)

	it("2020 is Saturday", function()
		assert.are.equal(4, activity.first_week_day(2020))
	end)
end)