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package ent
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import (
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"testing"
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)
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// thanks to @spheenik and @invokr for the expected huffman codes. these are
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// ripped from the huffman trees that are known to be working in clarity and
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// manta.
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var expected_codes = map[string]string{
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"PlusOne": "0",
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"FieldPathEncodeFinish": "10",
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"PlusTwo": "1110",
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"PushOneLeftDeltaNRightNonZeroPack6Bits": "1111",
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"PushOneLeftDeltaOneRightNonZero": "11000",
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"PlusN": "11010",
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"PlusThree": "110010",
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"PopAllButOnePlusOne": "110011",
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"PushOneLeftDeltaNRightNonZero": "11011001",
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"PushOneLeftDeltaOneRightZero": "11011010",
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"PushOneLeftDeltaNRightZero": "11011100",
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"PopAllButOnePlusNPack6Bits": "11011110",
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"PlusFour": "11011111",
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"PopAllButOnePlusN": "110110000",
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"PushOneLeftDeltaNRightNonZeroPack8Bits": "110110110",
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"NonTopoPenultimatePlusOne": "110110111",
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"PopAllButOnePlusNPack3Bits": "110111010",
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"PushNAndNonTopological": "110111011",
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"NonTopoComplexPack4Bits": "1101100010",
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"NonTopoComplex": "11011000111",
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"PushOneLeftDeltaZeroRightZero": "110110001101",
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"PopOnePlusOne": "110110001100001",
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"PushOneLeftDeltaZeroRightNonZero": "110110001100101",
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"PopNAndNonTopographical": "1101100011000000",
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"PopNPlusN": "1101100011000001",
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"PushN": "1101100011000100",
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"PushThreePack5LeftDeltaN": "1101100011000101",
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"PopNPlusOne": "1101100011000110",
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"PopOnePlusN": "1101100011000111",
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"PushTwoLeftDeltaZero": "1101100011001000",
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"PushThreeLeftDeltaZero": "11011000110010010",
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"PushTwoPack5LeftDeltaZero": "11011000110010011",
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"PushTwoLeftDeltaN": "11011000110011000",
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"PushThreePack5LeftDeltaOne": "11011000110011001",
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"PushThreeLeftDeltaN": "11011000110011010",
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"PushTwoPack5LeftDeltaN": "11011000110011011",
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"PushTwoLeftDeltaOne": "11011000110011100",
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"PushThreePack5LeftDeltaZero": "11011000110011101",
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"PushThreeLeftDeltaOne": "11011000110011110",
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"PushTwoPack5LeftDeltaOne": "11011000110011111",
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}
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func TestTree(t *testing.T) {
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var testWalk func(node, string)
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testWalk = func(n node, code string) {
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switch v := n.(type) {
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case lNode:
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if expected_codes[v.name] != code {
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t.Errorf("op %s has code %s, expected %s", v.name, code, expected_codes[v.name])
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} else {
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t.Logf("op %s has expected code %s", v.name, code)
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}
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case iNode:
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testWalk(v.left, code+"0")
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testWalk(v.right, code+"1")
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}
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}
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testWalk(huffRoot, "")
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}
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