logger: Add unit tests

Change-type: minor
Signed-off-by: Petros Angelatos <petrosagg@gmail.com>

test/12-logger.spec.coffee

@@ -1,39 +1,106 @@
+https = require 'https'
+stream = require 'stream'
+zlib = require 'zlib'
+
+Promise = require 'bluebird'
 m = require 'mochainon'
 { expect } = m.chai
-{ spy, useFakeTimers } = m.sinon
+{ stub } = m.sinon
 
 Logger = require '../src/logger'
-
 describe 'Logger', ->
-	before ->
-		@fakeBinder = {
-			logBatch: spy()
-		}
+	beforeEach ->
+		@_req = new stream.PassThrough()
+		@_req.flushHeaders = m.sinon.spy()
+		@_req.end = m.sinon.spy()
+
+		@_req.body = ''
+		@_req
+			.pipe(zlib.createGunzip())
+			.on 'data', (chunk) =>
+				@_req.body += chunk
+
+		stub(https, 'request').returns(@_req)
+
 		@fakeEventTracker = {
-			track: spy()
+			track: m.sinon.spy()
 		}
-		@logger = new Logger({ eventTracker: @fakeEventTracker })
-		@logger.init({ pubnub: {}, channel: 'foo', offlineMode: 'false', enable: 'true', nativeLogger: 'true', apiBinder: @fakeBinder })
 
-	after ->
-		@logger.stop()
+		@logger = new Logger({eventTracker: @fakeEventTracker})
+		@logger.init({
+			apiEndpoint: 'https://example.com'
+			uuid: 'deadbeef'
+			deviceApiKey: 'secretkey'
+			offlineMode: false
+		})
 
-	it 'publishes logs to the resin API by default', (done) ->
-		theTime = Date.now()
-		@logger.log(message: 'Hello!', timestamp: theTime)
-		setTimeout( =>
-			expect(@fakeBinder.logBatch).to.be.calledWith([ { message: 'Hello!', timestamp: theTime } ])
-			@fakeBinder.logBatch.reset()
-			done()
-		, 1020)
+	afterEach ->
+		https.request.restore()
 
-	it 'allows logging system messages which are also reported to the eventTracker', (done) ->
-		clock = useFakeTimers()
-		clock.tick(10)
-		@logger.logSystemMessage('Hello there!', { someProp: 'someVal' }, 'Some event name')
+	it 'waits the grace period before sending any logs', ->
+		clock = m.sinon.useFakeTimers()
+		@logger.log({message: 'foobar', serviceId: 15})
+		clock.tick(4999)
 		clock.restore()
-		setTimeout( =>
-			expect(@fakeBinder.logBatch).to.be.calledWith([ { message: 'Hello there!', timestamp: 10, isSystem: true } ])
+
+		Promise.delay(10)
+		.then =>
+			expect(@_req.body).to.equal('')
+
+	it 'tears down the connection after inactivity', ->
+		clock = m.sinon.useFakeTimers()
+		@logger.log({message: 'foobar', serviceId: 15})
+		clock.tick(61000)
+		clock.restore()
+
+		Promise.delay(10)
+		.then =>
+			expect(@_req.end.calledOnce).to.be.true
+
+
+	it 'sends logs as gzipped ndjson', ->
+		clock = m.sinon.useFakeTimers()
+		@logger.log({ message: 'foobar', serviceId: 15 })
+		@logger.log({ timestamp: 1337, message: 'foobar', serviceId: 15 })
+		@logger.log({ message: 'foobar' }) # shold be ignored
+		clock.tick(10000)
+		clock.restore()
+
+		expect(https.request.calledOnce).to.be.true
+		opts = https.request.firstCall.args[0]
+
+		expect(opts.href).to.equal('https://example.com/device/v2/deadbeef/log-stream')
+		expect(opts.method).to.equal('POST')
+		expect(opts.headers).to.deep.equal({
+			'Authorization': 'Bearer secretkey'
+			'Content-Type': 'application/x-ndjson'
+			'Content-Encoding': 'gzip'
+		})
+
+		# small delay for the streams to propagate data
+		Promise.delay(10)
+		.then =>
+			lines = @_req.body.split('\n')
+			expect(lines.length).to.equal(3)
+			expect(lines[2]).to.equal('')
+
+			msg = JSON.parse(lines[0])
+			expect(msg).to.deep.equal({ timestamp: 0, message: 'foobar', serviceId: 15 })
+			msg = JSON.parse(lines[1])
+			expect(msg).to.deep.equal({ timestamp: 1337, message: 'foobar', serviceId: 15 })
+
+	it 'allows logging system messages which are also reported to the eventTracker', ->
+		clock = m.sinon.useFakeTimers()
+		@logger.logSystemMessage('Hello there!', { someProp: 'someVal' }, 'Some event name')
+		clock.tick(10000)
+		clock.restore()
+
+		Promise.delay(10)
+		.then =>
 			expect(@fakeEventTracker.track).to.be.calledWith('Some event name', { someProp: 'someVal' })
-			done()
-		, 1020)
+			lines = @_req.body.split('\n')
+			expect(lines.length).to.equal(2)
+			expect(lines[1]).to.equal('')
+
+			msg = JSON.parse(lines[0])
+			expect(msg).to.deep.equal({ message: 'Hello there!', timestamp: 0, isSystem: true })