tests: Also cover happy case for fbp-diff CLI tool

Author: jonnor

spec/cli.coffee

@@ -13,6 +13,10 @@ fbpDiff = (a, b, options = {}, callback) ->
     s = { stdout: stdout, stderr: stderr }
     return callback err, s
 
+fixture = (p) ->
+  path = require 'path'
+  return path.join __dirname, 'fixtures', p
+
 describe 'fbp-diff', ->
   describe 'with non-existant files', ->
     it 'should exit with error', (done) ->
@@ -21,3 +25,17 @@ describe 'fbp-diff', ->
         chai.expect(streams.stderr).to.contain 'no such file'
         chai.expect(streams.stderr).to.contain 'nonexist.'
         done()
+
+  describe 'with two .fbp files with changes', ->
+    output = ''
+    it 'should succeed', (done) ->
+      a = fixture 'fbp-git-diff-nZC2/from.PortalLights.fbp'
+      b = fixture 'fbp-git-diff-nZC2/to.PortalLights.fbp'
+      fbpDiff a, b, {}, (err, streams) ->
+        chai.expect(err).to.not.exist
+        output = streams.stdout
+        done()
+    it 'stdout should contain a diff', ->
+      chai.expect(output).to.be.a 'string'
+      chai.expect(output).to.contain '- "true" -> HWSPI ledchain'
+      chai.expect(output).to.contain '- OUTPORT=ledchain.PIXELSET:PIXELSET'

spec/fixtures/fbp-git-diff-nZC2/from.PortalLights.fbp

@@ -0,0 +1,19 @@
+# @runtime microflo
+
+INPORT=ledchain.IN:PIXEL
+INPORT=ledchain.SHOW:SHOW
+OUTPORT=ledchain.PIXELSET:PIXELSET
+OUTPORT=ledchain.READY:READY
+OUTPORT=ledchain.SHOWN:SHOWN
+
+#'2' -> PINDATA ledchain(LedChainWS)
+#'3' -> PINCLK ledchain
+'true' -> HWSPI ledchain(LedChainWS)
+'50' -> PIXELS ledchain
+#'[37, "0x404040"]' -> IN ledchain
+#'true' -> SHOW ledchain
+
+# Workaround to be able to get the outport data
+# MicroFlo currently subscribe to packets with no destination...
+ledchain SHOWN -> IN dummy(Forward)
+ledchain READY -> IN dummyB(Forward)

spec/fixtures/fbp-git-diff-nZC2/to.PortalLights.fbp

@@ -0,0 +1,17 @@
+# @runtime microflo
+
+INPORT=ledchain.IN:PIXEL
+INPORT=ledchain.SHOW:SHOW
+OUTPORT=ledchain.READY:READY
+OUTPORT=ledchain.SHOWN:SHOWN
+
+'2' -> PINDATA ledchain(LedChainWS)
+'3' -> PINCLK ledchain
+'50' -> PIXELS ledchain
+#'true' -> SHOW ledchain
+
+# Workaround to be able to get the outport data
+# MicroFlo currently subscribe to packets with no destination...
+ledchain SHOWN -> IN dummy(Forward)
+ledchain READY -> IN dummyB(Forward)
+