overleaf/services/clsi/test/acceptance/coffee/ExampleDocumentTests.coffee

# Client = require "./helpers/Client"
# request = require "request"
# require("chai").should()
# fs = require "fs"
# ChildProcess = require "child_process"
# ClsiApp = require "./helpers/ClsiApp"

# fixturePath = (path) -> __dirname + "/../fixtures/" + path

# try
# 	fs.mkdirSync(fixturePath("tmp"))
# catch e

# convertToPng = (pdfPath, pngPath, callback = (error) ->) ->
# 	command = "convert #{fixturePath(pdfPath)} #{fixturePath(pngPath)}"
# 	convert = ChildProcess.exec command
# 	stdout = ""
# 	convert.stdout.on "data", (chunk) -> console.log "STDOUT", chunk.toString()
# 	convert.stderr.on "data", (chunk) -> console.log "STDERR", chunk.toString()
# 	convert.on "exit", () ->
# 		callback()

# compare = (originalPath, generatedPath, callback = (error, same) ->) ->
# 	diff_file = "#{fixturePath(generatedPath)}-diff.png"
# 	proc = ChildProcess.exec "compare -metric mae #{fixturePath(originalPath)} #{fixturePath(generatedPath)} #{diff_file}"
# 	stderr = ""
# 	proc.stderr.on "data", (chunk) -> stderr += chunk
# 	proc.on "exit", () ->
# 		if stderr.trim() == "0 (0)"
# 			fs.unlink diff_file # remove output diff if test matches expected image
# 			callback null, true
# 		else
# 			console.log "compare result", stderr
# 			callback null, false

# checkPdfInfo = (pdfPath, callback = (error, output) ->) ->
# 	proc = ChildProcess.exec "pdfinfo #{fixturePath(pdfPath)}"
# 	stdout = ""
# 	proc.stdout.on "data", (chunk) -> stdout += chunk
# 	proc.stderr.on "data", (chunk) -> console.log "STDERR", chunk.toString()
# 	proc.on "exit", () ->
# 		if stdout.match(/Optimized:\s+yes/)
# 			callback null, true
# 		else
# 			console.log "pdfinfo result", stdout
# 			callback null, false

# compareMultiplePages = (project_id, callback = (error) ->) ->
# 	compareNext = (page_no, callback) ->
# 		path = "tmp/#{project_id}-source-#{page_no}.png"
# 		fs.stat fixturePath(path), (error, stat) ->
# 			if error?
# 				callback()
# 			else
# 				compare  "tmp/#{project_id}-source-#{page_no}.png", "tmp/#{project_id}-generated-#{page_no}.png", (error, same) =>
# 					throw error if error?
# 					same.should.equal true
# 					compareNext page_no + 1, callback
# 	compareNext 0, callback

# comparePdf = (project_id, example_dir, callback = (error) ->) ->
# 	convertToPng "tmp/#{project_id}.pdf", "tmp/#{project_id}-generated.png", (error) =>
# 		throw error if error?
# 		convertToPng "examples/#{example_dir}/output.pdf", "tmp/#{project_id}-source.png", (error) =>
# 			throw error if error?
# 			fs.stat fixturePath("tmp/#{project_id}-source-0.png"), (error, stat) =>
# 				if error?
# 					compare  "tmp/#{project_id}-source.png", "tmp/#{project_id}-generated.png", (error, same) =>
# 						throw error if error?
# 						same.should.equal true
# 						callback()
# 				else
# 					compareMultiplePages project_id, (error) ->
# 						throw error if error?
# 						callback()

# downloadAndComparePdf = (project_id, example_dir, url, callback = (error) ->) ->
# 	writeStream = fs.createWriteStream(fixturePath("tmp/#{project_id}.pdf"))
# 	request.get(url).pipe(writeStream)
# 	writeStream.on "close", () =>
# 		checkPdfInfo "tmp/#{project_id}.pdf", (error, optimised) =>
# 			throw error if error?
# 			optimised.should.equal true
# 			comparePdf project_id, example_dir, callback

# Client.runServer(4242, fixturePath("examples"))

# describe "Example Documents", ->
# 	before (done) ->
# 		ChildProcess.exec("rm test/acceptance/fixtures/tmp/*").on "exit", () -> 
# 			ClsiApp.ensureRunning done


# 	for example_dir in fs.readdirSync fixturePath("examples")
# 		do (example_dir) ->
# 			describe example_dir, ->
# 				before ->
# 					@project_id = Client.randomId() + "_" + example_dir

# 				it "should generate the correct pdf", (done) ->
# 					Client.compileDirectory @project_id, fixturePath("examples"), example_dir, 4242, (error, res, body) =>
# 						if error || body?.compile?.status is "failure"
# 							console.log "DEBUG: error", error, "body", JSON.stringify(body)
# 						pdf = Client.getOutputFile body, "pdf"
# 						downloadAndComparePdf(@project_id, example_dir, pdf.url, done)

# 				it "should generate the correct pdf on the second run as well", (done) ->
# 					Client.compileDirectory @project_id, fixturePath("examples"), example_dir, 4242, (error, res, body) =>
# 						if error || body?.compile?.status is "failure"
# 							console.log "DEBUG: error", error, "body", JSON.stringify(body)
# 						pdf = Client.getOutputFile body, "pdf"
# 						downloadAndComparePdf(@project_id, example_dir, pdf.url, done)