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1 vows = require "vows"
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2 assert = require "assert"
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3 binpack = require "../index"
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4
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5 # do a round trip
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6 okayForOptions = (num, options) ->
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7 return false if options.size? and Math.abs(num) > options.size?
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8 return false if num < 0 and options.unsigned
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9 true
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10
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11 roundTrip = (type, options) ->
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12 works : (num) ->
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13 return null if not okayForOptions(num, options)
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14 assert.strictEqual (binpack["unpack" + type] binpack["pack" + type] num), num
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15
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16 "fails plus 1.1" : (num) ->
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17 return null if not okayForOptions(num, options)
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18 assert.notStrictEqual (binpack["unpack" + type] binpack["pack" + type] num + 1.1), num
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19
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20 "works little endian" : (num) ->
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21 return null if options.onebyte
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22 return null if not okayForOptions(num, options)
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23 assert.strictEqual (binpack["unpack" + type] (binpack["pack" + type] num, "little"), "little"), num
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24
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25 "works big endian" : (num) ->
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26 return null if options.onebyte
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27 return null if not okayForOptions(num, options)
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28 assert.strictEqual (binpack["unpack" + type] (binpack["pack" + type] num, "big"), "big"), num
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29
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30 "fails mismatched" : (num) ->
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31 return null if not okayForOptions(num, options)
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32 return null if num is 0
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33 return null if options.onebyte
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34 assert.notStrictEqual (binpack["unpack" + type] (binpack["pack" + type] num, "little"), "big"), num
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35
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36 types =
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37 "Float32" : {}
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38 "Float64" : {}
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39 "Int8" : {onebyte : true, size : 128}
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40 "Int16" : {size : 32768}
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41 "Int32" : {}
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42 "Int64" : {}
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43 "UInt8" : {unsigned : true, onebyte : true, size:255}
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44 "UInt16" : {unsigned : true, size : 65535}
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45 "UInt32" : {unsigned : true}
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46 "UInt64" : {unsigned : true}
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47
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48 # round trip testing makes up the core of the test.
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49 roundTripTests = (num) ->
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50 tests = {topic : num}
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51 for type, options of types
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52 tests[type + "round trip test"] = roundTrip type, options
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53 tests
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54
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55 vows.describe("binpack").addBatch(
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56 # choose a bunch of random numbers
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57 'roundTrips for 0' : roundTripTests 0
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58 'roundTrips for 12' : roundTripTests 12
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59 'roundTrips for -18' : roundTripTests -18
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60 'roundTrips for 129' : roundTripTests 129
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61 'roundTrips for -400' : roundTripTests -400
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62 'roundTrips for 60000' : roundTripTests 60000
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63 'roundTrips for 1234567' : roundTripTests 1234567
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64 ).export module
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