tests: Add a test for floating point errors in the AVM1 representation of `_xscale`, `_yscale`, and `_rotation`.

core/tests/regression_tests.rs

@@ -383,6 +383,7 @@ swf_tests! {
     (as3_array_sort, "avm2/array_sort", 1),
     (as3_array_sorton, "avm2/array_sorton", 1),
     (as3_array_hasownproperty, "avm2/array_hasownproperty", 1),
+    (stage_property_representation, "avm1/stage_property_representation", 1),
 }
 
 // TODO: These tests have some inaccuracies currently, so we use approx_eq to test that numeric values are close enough.

core/tests/swfs/avm1/stage_property_representation/output.txt

@@ -0,0 +1,586 @@
+//(xscale = 20 through 420)
+20
+22
+24
+26
+28
+30
+32
+34
+36
+38
+40
+42
+44
+46
+48
+50
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+392
+394
+396
+398
+400
+402
+404
+406
+408
+410
+412
+414
+416
+418
+420
+//(_yscale = 20 through 420)
+20
+22
+24
+26
+28
+30
+32
+34
+36
+38
+40
+42
+44
+46
+48
+50
+52
+54
+56
+58
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+216
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+220
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+224
+226
+228
+230
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+234
+236
+238
+240
+242
+244
+246
+248
+250
+252
+254
+256
+258
+260
+262
+264
+266
+268
+270
+272
+274
+276
+278
+280
+282
+284
+286
+288
+290
+292
+294
+296
+298
+300
+302
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+414
+416
+418
+420
+//(_rotation = 180 through 180)
+180
+-178
+-176
+-174
+-172
+-170
+-168
+-166
+-164
+-162
+-160
+-158
+-156
+-154
+-152
+-150
+-148
+-146
+-144
+-142
+-140
+-138
+-136
+-134
+-132
+-130
+-128
+-126
+-124
+-122
+-120
+-118
+-116
+-114
+-112
+-110
+-108
+-106
+-104
+-102
+-100
+-98
+-96
+-94
+-92
+-90
+-88
+-86
+-84
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+-80
+-78
+-76
+-74
+-72
+-70
+-68
+-66
+-64
+-62
+-60
+-58
+-56
+-54
+-52
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+-48
+-46
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+-42
+-40
+-38
+-36
+-34
+-32
+-30
+-28
+-26
+-24
+-22
+-20
+-18
+-16
+-14
+-12
+-10
+-8
+-6
+-4
+-2
+0
+2
+4
+6
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+180