test("transformer", () ->
	english = {
		meta: {
			Title: "Ten Commandments"
			Author: "God knows"
		}
		content: [{
			section: "1"
			text: "Thou shalt have no other gods before me"
		}, {
			section: "2"
			text: "Thou shalt not take the name of the Lord thy God in vain"
		}, {
			section: "3"
			text: "Remember the sabbath day, to keep it holy"
		}]
	}

	czech = {
		meta: {
			Title: "Desatero"
			Author: "Ví bůh"
		}
		content: [{
			section: "1"
			text: "V jednoho Boha věřiti budeš."
		}, {
			section: "2"
			text: "Nevezmeš jména Božího nadarmo."
		}, {
			section: "3"
			text: "Pomni, abys den sváteční světil."
		}]
	}

	polish = {
		meta: {
			Title: "Dekalog"
			Author: "Bóg wie"
		}
		content: [{
			section: "1"
			text: "Nie będziesz miał bogów cudzych przede mną."
		}, {
			section: "2"
			text: "Nie będziesz wzywał imienia Boga twego nadaremno."
		}, {
			section: "3"
			text: "Pamiętaj, abyś dzień święty święcił."
		}]
	}

	expected = {
		meta: [{
			Title: "Ten Commandments"
			Author: "God knows"
		}, {
			Title: "Desatero"
			Author: "Ví bůh"
		}, {
			Title: "Dekalog"
			Author: "Bóg wie"
		}]

		verses: [[{
			section: "1"
			text: "Thou shalt have no other gods before me"
		}, {
			section: "1"
			text: "V jednoho Boha věřiti budeš."
		}, {
			section: "1"
			text: "Nie będziesz miał bogów cudzych przede mną."
		}], [{
			section: "2"
			text: "Thou shalt not take the name of the Lord thy God in vain"
		}, {
			section: "2"
			text: "Nevezmeš jména Božího nadarmo."
		}, {
			section: "2"
			text: "Nie będziesz wzywał imienia Boga twego nadaremno."
		}], [{
			section: "3"
			text: "Remember the sabbath day, to keep it holy"
		}, {
			section: "3"
			text: "Pomni, abys den sváteční světil."
		}, {
			section: "3"
			text: "Pamiętaj, abyś dzień święty święcił."
		}]]
	}

	# Test transformation works as it should
	transformer = injector.get("transformer")
	deepEqual(transformer([english, czech, polish]), expected)

	# Test transformation still works when we remove Polish
	expected.meta = expected.meta.slice(0, 2)
	expected.verses = _.map(expected.verses, (translations) ->
		return translations.slice(0, 2)
	)
	deepEqual(transformer([english, czech]), expected)

	# Test empty throws an error
	throws(() ->
		transformer()
	)

	# Czech is shortest
	czech.content.pop()
	throws(() ->
		transformer([english, czech, polish])
	, /missing.*nevezmeš jména/i)

	# English is longest
	polish.content.pop()
	throws(() ->
		transformer([english, czech, polish])
	, /superfluous.*sabbath/i)

	# Czech and Polish too short plus different lengths
	polish.content.pop()
	throws(() ->
		transformer([english, czech, polish])
	, /missing.*bogów cudzych.*nevezmeš/i)
)