summaryrefslogtreecommitdiff
path: root/src/test/scala/chiselTests/StrongEnum.scala
blob: c43d832afb8171618c7db5fda45fd6755969a0c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
// SPDX-License-Identifier: Apache-2.0

package chiselTests

import chisel3._
import chisel3.experimental.ChiselEnum
import chisel3.internal.firrtl.UnknownWidth
import chisel3.internal.naming.chiselName
import chisel3.stage.{ChiselGeneratorAnnotation, ChiselStage}
import chisel3.util._
import chisel3.testers.BasicTester
import org.scalatest.Assertion
import org.scalatest.freespec.AnyFreeSpec
import org.scalatest.matchers.should.Matchers

object EnumExample extends ChiselEnum {
  val e0, e1, e2 = Value

  val e100 = Value(100.U)
  val e101 = Value(101.U)

  val litValues = List(0.U, 1.U, 2.U, 100.U, 101.U)
}

object OtherEnum extends ChiselEnum {
  val otherEnum = Value
}

object NonLiteralEnumType extends ChiselEnum {
  val nonLit = Value(UInt())
}

object NonIncreasingEnum extends ChiselEnum {
  val x = Value(2.U)
  val y = Value(2.U)
}

class SimpleConnector(inType: Data, outType: Data) extends Module {
  val io = IO(new Bundle {
    val in = Input(inType)
    val out = Output(outType)
  })

  io.out := io.in
}

class CastToUInt extends Module {
  val io = IO(new Bundle {
    val in = Input(EnumExample())
    val out = Output(UInt())
  })

  io.out := io.in.asUInt()
}

class CastFromLit(in: UInt) extends Module {
  val io = IO(new Bundle {
    val out = Output(EnumExample())
    val valid = Output(Bool())
  })

  io.out := EnumExample(in)
  io.valid := io.out.isValid
}

class CastFromNonLit extends Module {
  val io = IO(new Bundle {
    val in = Input(UInt(EnumExample.getWidth.W))
    val out = Output(EnumExample())
    val valid = Output(Bool())
  })

  io.out := EnumExample(io.in)
  io.valid := io.out.isValid
}

class SafeCastFromNonLit extends Module {
  val io = IO(new Bundle {
    val in = Input(UInt(EnumExample.getWidth.W))
    val out = Output(EnumExample())
    val valid = Output(Bool())
  })

  val (enum, valid) = EnumExample.safe(io.in)
  io.out := enum
  io.valid := valid
}

class CastFromNonLitWidth(w: Option[Int] = None) extends Module {
  val width = if (w.isDefined) w.get.W else UnknownWidth()

  val io = IO(new Bundle {
    val in = Input(UInt(width))
    val out = Output(EnumExample())
  })

  io.out := EnumExample(io.in)
}

class EnumOps(val xType: ChiselEnum, val yType: ChiselEnum) extends Module {
  val io = IO(new Bundle {
    val x = Input(xType())
    val y = Input(yType())

    val lt = Output(Bool())
    val le = Output(Bool())
    val gt = Output(Bool())
    val ge = Output(Bool())
    val eq = Output(Bool())
    val ne = Output(Bool())
  })

  io.lt := io.x < io.y
  io.le := io.x <= io.y
  io.gt := io.x > io.y
  io.ge := io.x >= io.y
  io.eq := io.x === io.y
  io.ne := io.x =/= io.y
}

object StrongEnumFSM {
  object State extends ChiselEnum {
    val sNone, sOne1, sTwo1s = Value

    val correct_annotation_map = Map[String, BigInt]("sNone" -> 0, "sOne1" -> 1, "sTwo1s" -> 2)
  }
}

class StrongEnumFSM extends Module {
  import StrongEnumFSM.State
  import StrongEnumFSM.State._

  // This FSM detects two 1's one after the other
  val io = IO(new Bundle {
    val in = Input(Bool())
    val out = Output(Bool())
    val state = Output(State())
  })

  val state = RegInit(sNone)

  io.out := (state === sTwo1s)
  io.state := state

  switch(state) {
    is(sNone) {
      when(io.in) {
        state := sOne1
      }
    }
    is(sOne1) {
      when(io.in) {
        state := sTwo1s
      }.otherwise {
        state := sNone
      }
    }
    is(sTwo1s) {
      when(!io.in) {
        state := sNone
      }
    }
  }
}

class CastToUIntTester extends BasicTester {
  for ((enum, lit) <- EnumExample.all.zip(EnumExample.litValues)) {
    val mod = Module(new CastToUInt)
    mod.io.in := enum
    assert(mod.io.out === lit)
  }
  stop()
}

class CastFromLitTester extends BasicTester {
  for ((enum, lit) <- EnumExample.all.zip(EnumExample.litValues)) {
    val mod = Module(new CastFromLit(lit))
    assert(mod.io.out === enum)
    assert(mod.io.valid === true.B)
  }
  stop()
}

class CastFromNonLitTester extends BasicTester {
  for ((enum, lit) <- EnumExample.all.zip(EnumExample.litValues)) {
    val mod = Module(new CastFromNonLit)
    mod.io.in := lit
    assert(mod.io.out === enum)
    assert(mod.io.valid === true.B)
  }

  val invalid_values =
    (1 until (1 << EnumExample.getWidth)).filter(!EnumExample.litValues.map(_.litValue).contains(_)).map(_.U)

  for (invalid_val <- invalid_values) {
    val mod = Module(new CastFromNonLit)
    mod.io.in := invalid_val

    assert(mod.io.valid === false.B)
  }

  stop()
}

class SafeCastFromNonLitTester extends BasicTester {
  for ((enum, lit) <- EnumExample.all.zip(EnumExample.litValues)) {
    val mod = Module(new SafeCastFromNonLit)
    mod.io.in := lit
    assert(mod.io.out === enum)
    assert(mod.io.valid === true.B)
  }

  val invalid_values =
    (1 until (1 << EnumExample.getWidth)).filter(!EnumExample.litValues.map(_.litValue).contains(_)).map(_.U)

  for (invalid_val <- invalid_values) {
    val mod = Module(new SafeCastFromNonLit)
    mod.io.in := invalid_val

    assert(mod.io.valid === false.B)
  }

  stop()
}

class CastToInvalidEnumTester extends BasicTester {
  val invalid_value: UInt = EnumExample.litValues.last + 1.U
  Module(new CastFromLit(invalid_value))
}

class EnumOpsTester extends BasicTester {
  for {
    x <- EnumExample.all
    y <- EnumExample.all
  } {
    val mod = Module(new EnumOps(EnumExample, EnumExample))
    mod.io.x := x
    mod.io.y := y

    assert(mod.io.lt === (x.asUInt() < y.asUInt()))
    assert(mod.io.le === (x.asUInt() <= y.asUInt()))
    assert(mod.io.gt === (x.asUInt() > y.asUInt()))
    assert(mod.io.ge === (x.asUInt() >= y.asUInt()))
    assert(mod.io.eq === (x.asUInt() === y.asUInt()))
    assert(mod.io.ne === (x.asUInt() =/= y.asUInt()))
  }
  stop()
}

class InvalidEnumOpsTester extends BasicTester {
  val mod = Module(new EnumOps(EnumExample, OtherEnum))
  mod.io.x := EnumExample.e0
  mod.io.y := OtherEnum.otherEnum
}

class IsLitTester extends BasicTester {
  for (e <- EnumExample.all) {
    val wire = WireDefault(e)

    assert(e.isLit)
    assert(!wire.isLit)
  }
  stop()
}

class NextTester extends BasicTester {
  for ((e, n) <- EnumExample.all.zip(EnumExample.litValues.tail :+ EnumExample.litValues.head)) {
    assert(e.next.litValue == n.litValue)
    val w = WireDefault(e)
    assert(w.next === EnumExample(n))
  }
  stop()
}

class WidthTester extends BasicTester {
  assert(EnumExample.getWidth == EnumExample.litValues.last.getWidth)
  assert(EnumExample.all.forall(_.getWidth == EnumExample.litValues.last.getWidth))
  assert(EnumExample.all.forall { e =>
    val w = WireDefault(e)
    w.getWidth == EnumExample.litValues.last.getWidth
  })
  stop()
}

class StrongEnumFSMTester extends BasicTester {
  import StrongEnumFSM.State._

  val dut = Module(new StrongEnumFSM)

  // Inputs and expected results
  val inputs: Vec[Bool] = VecInit(false.B, true.B, false.B, true.B, true.B, true.B, false.B, true.B, true.B, false.B)
  val expected: Vec[Bool] =
    VecInit(false.B, false.B, false.B, false.B, false.B, true.B, true.B, false.B, false.B, true.B)
  val expected_state = VecInit(sNone, sNone, sOne1, sNone, sOne1, sTwo1s, sTwo1s, sNone, sOne1, sTwo1s)

  val cntr = Counter(inputs.length)
  val cycle = cntr.value

  dut.io.in := inputs(cycle)
  assert(dut.io.out === expected(cycle))
  assert(dut.io.state === expected_state(cycle))

  when(cntr.inc()) {
    stop()
  }
}

class IsOneOfTester extends BasicTester {
  import EnumExample._

  // is one of itself
  assert(e0.isOneOf(e0))

  // is one of Seq of itself
  assert(e0.isOneOf(Seq(e0)))
  assert(e0.isOneOf(Seq(e0, e0, e0, e0)))
  assert(e0.isOneOf(e0, e0, e0, e0))

  // is one of Seq of multiple elements
  val subset = Seq(e0, e1, e2)
  assert(e0.isOneOf(subset))
  assert(e1.isOneOf(subset))
  assert(e2.isOneOf(subset))

  // is not element not in subset
  assert(!e100.isOneOf(subset))
  assert(!e101.isOneOf(subset))

  // test multiple elements with variable number of arguments
  assert(e0.isOneOf(e0, e1, e2))
  assert(e1.isOneOf(e0, e1, e2))
  assert(e2.isOneOf(e0, e1, e2))
  assert(!e100.isOneOf(e0, e1, e2))
  assert(!e101.isOneOf(e0, e1, e2))

  // is not another value
  assert(!e0.isOneOf(e1))
  assert(!e2.isOneOf(e101))

  stop()
}

class StrongEnumSpec extends ChiselFlatSpec with Utils {
  import chisel3.internal.ChiselException

  behavior.of("Strong enum tester")

  it should "fail to instantiate non-literal enums with the Value function" in {
    an[ExceptionInInitializerError] should be thrownBy extractCause[ExceptionInInitializerError] {
      ChiselStage.elaborate(new SimpleConnector(NonLiteralEnumType(), NonLiteralEnumType()))
    }
  }

  it should "fail to instantiate non-increasing enums with the Value function" in {
    an[ExceptionInInitializerError] should be thrownBy extractCause[ExceptionInInitializerError] {
      ChiselStage.elaborate(new SimpleConnector(NonIncreasingEnum(), NonIncreasingEnum()))
    }
  }

  it should "connect enums of the same type" in {
    ChiselStage.elaborate(new SimpleConnector(EnumExample(), EnumExample()))
    ChiselStage.elaborate(new SimpleConnector(EnumExample(), EnumExample.Type()))
  }

  it should "fail to connect a strong enum to a UInt" in {
    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new SimpleConnector(EnumExample(), UInt()))
    }
  }

  it should "fail to connect enums of different types" in {
    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new SimpleConnector(EnumExample(), OtherEnum()))
    }

    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new SimpleConnector(EnumExample.Type(), OtherEnum.Type()))
    }
  }

  it should "cast enums to UInts correctly" in {
    assertTesterPasses(new CastToUIntTester)
  }

  it should "cast literal UInts to enums correctly" in {
    assertTesterPasses(new CastFromLitTester)
  }

  it should "cast non-literal UInts to enums correctly and detect illegal casts" in {
    assertTesterPasses(new CastFromNonLitTester)
  }

  it should "safely cast non-literal UInts to enums correctly and detect illegal casts" in {
    assertTesterPasses(new SafeCastFromNonLitTester)
  }

  it should "prevent illegal literal casts to enums" in {
    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new CastToInvalidEnumTester)
    }
  }

  it should "only allow non-literal casts to enums if the width is smaller than or equal to the enum width" in {
    for (w <- 0 to EnumExample.getWidth)
      ChiselStage.elaborate(new CastFromNonLitWidth(Some(w)))

    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new CastFromNonLitWidth)
    }

    for (w <- (EnumExample.getWidth + 1) to (EnumExample.getWidth + 100)) {
      a[ChiselException] should be thrownBy extractCause[ChiselException] {
        ChiselStage.elaborate(new CastFromNonLitWidth(Some(w)))
      }
    }
  }

  it should "execute enum comparison operations correctly" in {
    assertTesterPasses(new EnumOpsTester)
  }

  it should "fail to compare enums of different types" in {
    a[ChiselException] should be thrownBy extractCause[ChiselException] {
      ChiselStage.elaborate(new InvalidEnumOpsTester)
    }
  }

  it should "correctly check whether or not enums are literal" in {
    assertTesterPasses(new IsLitTester)
  }

  it should "return the correct next values for enums" in {
    assertTesterPasses(new NextTester)
  }

  it should "return the correct widths for enums" in {
    assertTesterPasses(new WidthTester)
  }

  it should "maintain Scala-level type-safety" in {
    def foo(e: EnumExample.Type): Unit = {}

    "foo(EnumExample.e1); foo(EnumExample.e1.next)" should compile
    "foo(OtherEnum.otherEnum)" shouldNot compile
  }

  it should "prevent enums from being declared without names" in {
    "object UnnamedEnum extends ChiselEnum { Value }" shouldNot compile
  }

  "StrongEnum FSM" should "work" in {
    assertTesterPasses(new StrongEnumFSMTester)
  }

  "Casting a UInt to an Enum" should "warn if the UInt can express illegal states" in {
    object MyEnum extends ChiselEnum {
      val e0, e1, e2 = Value
    }

    class MyModule extends Module {
      val in = IO(Input(UInt(2.W)))
      val out = IO(Output(MyEnum()))
      out := MyEnum(in)
    }
    val (log, _) = grabLog(ChiselStage.elaborate(new MyModule))
    log should include("warn")
    log should include("Casting non-literal UInt")
  }

  it should "NOT warn if the Enum is total" in {
    object TotalEnum extends ChiselEnum {
      val e0, e1, e2, e3 = Value
    }

    class MyModule extends Module {
      val in = IO(Input(UInt(2.W)))
      val out = IO(Output(TotalEnum()))
      out := TotalEnum(in)
    }
    val (log, _) = grabLog(ChiselStage.elaborate(new MyModule))
    (log should not).include("warn")
  }

  "Casting a UInt to an Enum with .safe" should "NOT warn" in {
    object MyEnum extends ChiselEnum {
      val e0, e1, e2 = Value
    }

    class MyModule extends Module {
      val in = IO(Input(UInt(2.W)))
      val out = IO(Output(MyEnum()))
      out := MyEnum.safe(in)._1
    }
    val (log, _) = grabLog(ChiselStage.elaborate(new MyModule))
    (log should not).include("warn")
  }

  it should "NOT generate any validity logic if the Enum is total" in {
    object TotalEnum extends ChiselEnum {
      val e0, e1, e2, e3 = Value
    }

    class MyModule extends Module {
      val in = IO(Input(UInt(2.W)))
      val out = IO(Output(TotalEnum()))
      val (res, valid) = TotalEnum.safe(in)
      assert(valid.litToBoolean, "It should be true.B")
      out := res
    }
    val (log, _) = grabLog(ChiselStage.elaborate(new MyModule))
    (log should not).include("warn")
  }

  it should "correctly check if the enumeration is one of the values in a given sequence" in {
    assertTesterPasses(new IsOneOfTester)
  }
}

class StrongEnumAnnotator extends Module {
  import EnumExample._

  object LocalEnum extends ChiselEnum {
    val le0, le1 = Value
    val le2 = Value
    val le100 = Value(100.U)
  }

  val io = IO(new Bundle {
    val in = Input(EnumExample())
    val out = Output(EnumExample())
    val other = Output(OtherEnum())
    val local = Output(LocalEnum())
  })

  class Bund extends Bundle {
    val field = EnumExample()
    val other = OtherEnum()
    val local = LocalEnum()
    val vec = Vec(5, EnumExample())
    val inner_bundle1 = new Bundle {
      val x = UInt(4.W)
      val y = Vec(3, UInt(4.W))
      val e = EnumExample()
      val v = Vec(3, EnumExample())
    }
    val inner_bundle2 = new Bundle {}
    val inner_bundle3 = new Bundle {
      val x = Bool()
    }
    val inner_bundle4 = new Bundle {
      val inner_inner_bundle = new Bundle {}
    }
  }

  val simple = Wire(EnumExample())
  val vec = VecInit(e0, e1, e2)
  val vec_of_vecs = VecInit(VecInit(e0, e1), VecInit(e100, e101))

  val bund = Wire(new Bund())
  val vec_of_bundles = Wire(Vec(5, new Bund()))

  io.out := e101
  io.other := OtherEnum.otherEnum
  io.local := LocalEnum.le0
  simple := e100
  bund := DontCare
  vec_of_bundles := DontCare

  // Make sure that dynamically indexing into a Vec of enums will not cause an elaboration error.
  // The components created here will not be annotated.
  val cycle = RegInit(0.U)
  cycle := cycle + 1.U

  val indexed1 = vec_of_vecs(cycle)(cycle)
  val indexed2 = vec_of_bundles(cycle)
}

@chiselName
class StrongEnumAnnotatorWithChiselName extends Module {
  import EnumExample._

  object LocalEnum extends ChiselEnum {
    val le0, le1 = Value
    val le2 = Value
    val le100 = Value(100.U)
  }

  val io = IO(new Bundle {
    val in = Input(EnumExample())
    val out = Output(EnumExample())
    val other = Output(OtherEnum())
    val local = Output(LocalEnum())
  })

  class Bund extends Bundle {
    val field = EnumExample()
    val other = OtherEnum()
    val local = LocalEnum()
    val vec = Vec(5, EnumExample())
    val inner_bundle1 = new Bundle {
      val x = UInt(4.W)
      val y = Vec(3, UInt(4.W))
      val e = EnumExample()
      val v = Vec(3, EnumExample())
    }
    val inner_bundle2 = new Bundle {}
    val inner_bundle3 = new Bundle {
      val x = Bool()
    }
    val inner_bundle4 = new Bundle {
      val inner_inner_bundle = new Bundle {}
    }
  }

  val simple = Wire(EnumExample())
  val vec = VecInit(e0, e1, e2)
  val vec_of_vecs = VecInit(VecInit(e0, e1), VecInit(e100, e101))

  val bund = Wire(new Bund())
  val vec_of_bundles = Wire(Vec(5, new Bund()))

  io.out := e101
  io.other := OtherEnum.otherEnum
  io.local := LocalEnum.le0
  simple := e100
  bund := DontCare
  vec_of_bundles := DontCare

  // Make sure that dynamically indexing into a Vec of enums will not cause an elaboration error.
  // The components created here will not be annotated.
  val cycle = RegInit(0.U)
  cycle := cycle + 1.U

  val indexed1 = vec_of_vecs(cycle)(cycle)
  val indexed2 = vec_of_bundles(cycle)
}

class StrongEnumAnnotationSpec extends AnyFreeSpec with Matchers {
  import chisel3.experimental.EnumAnnotations._
  import firrtl.annotations.{Annotation, ComponentName}

  val enumExampleName = "EnumExample"
  val otherEnumName = "OtherEnum"
  val localEnumName = "LocalEnum"

  case class CorrectDefAnno(typeName: String, definition: Map[String, BigInt])
  case class CorrectCompAnno(targetName: String, typeName: String)
  case class CorrectVecAnno(targetName: String, typeName: String, fields: Set[Seq[String]])

  val correctDefAnnos = Seq(
    CorrectDefAnno(otherEnumName, Map("otherEnum" -> 0)),
    CorrectDefAnno(enumExampleName, Map("e0" -> 0, "e1" -> 1, "e2" -> 2, "e100" -> 100, "e101" -> 101)),
    CorrectDefAnno(localEnumName, Map("le0" -> 0, "le1" -> 1, "le2" -> 2, "le100" -> 100))
  )

  val correctCompAnnos = Seq(
    CorrectCompAnno("io.other", otherEnumName),
    CorrectCompAnno("io.local", localEnumName),
    CorrectCompAnno("io.out", enumExampleName),
    CorrectCompAnno("io.in", enumExampleName),
    CorrectCompAnno("simple", enumExampleName),
    CorrectCompAnno("bund.field", enumExampleName),
    CorrectCompAnno("bund.other", otherEnumName),
    CorrectCompAnno("bund.local", localEnumName),
    CorrectCompAnno("bund.inner_bundle1.e", enumExampleName)
  )

  val correctVecAnnos = Seq(
    CorrectVecAnno("vec", enumExampleName, Set()),
    CorrectVecAnno("vec_of_vecs", enumExampleName, Set()),
    CorrectVecAnno(
      "vec_of_bundles",
      enumExampleName,
      Set(Seq("field"), Seq("vec"), Seq("inner_bundle1", "e"), Seq("inner_bundle1", "v"))
    ),
    CorrectVecAnno("vec_of_bundles", otherEnumName, Set(Seq("other"))),
    CorrectVecAnno("vec_of_bundles", localEnumName, Set(Seq("local"))),
    CorrectVecAnno("bund.vec", enumExampleName, Set()),
    CorrectVecAnno("bund.inner_bundle1.v", enumExampleName, Set())
  )

  def printAnnos(annos: Seq[Annotation]) {
    println("Enum definitions:")
    annos.foreach {
      case EnumDefAnnotation(enumTypeName, definition) => println(s"\t$enumTypeName: $definition")
      case _                                           =>
    }
    println("Enum components:")
    annos.foreach {
      case EnumComponentAnnotation(target, enumTypeName) => println(s"\t$target => $enumTypeName")
      case _                                             =>
    }
    println("Enum vecs:")
    annos.foreach {
      case EnumVecAnnotation(target, enumTypeName, fields) => println(s"\t$target[$fields] => $enumTypeName")
      case _                                               =>
    }
  }

  def isCorrect(anno: EnumDefAnnotation, correct: CorrectDefAnno): Boolean = {
    (anno.typeName == correct.typeName ||
    anno.typeName.endsWith("." + correct.typeName) ||
    anno.typeName.endsWith("$" + correct.typeName)) &&
    anno.definition == correct.definition
  }

  def isCorrect(anno: EnumComponentAnnotation, correct: CorrectCompAnno): Boolean = {
    (anno.target match {
      case ComponentName(name, _) => name == correct.targetName
      case _                      => throw new Exception("Unknown target type in EnumComponentAnnotation")
    }) &&
    (anno.enumTypeName == correct.typeName || anno.enumTypeName.endsWith("." + correct.typeName) ||
    anno.enumTypeName.endsWith("$" + correct.typeName))
  }

  def isCorrect(anno: EnumVecAnnotation, correct: CorrectVecAnno): Boolean = {
    (anno.target match {
      case ComponentName(name, _) => name == correct.targetName
      case _                      => throw new Exception("Unknown target type in EnumVecAnnotation")
    }) &&
    (anno.typeName == correct.typeName || anno.typeName.endsWith("." + correct.typeName) ||
    anno.typeName.endsWith("$" + correct.typeName)) &&
    anno.fields.map(_.toSeq).toSet == correct.fields
  }

  def allCorrectDefs(annos: Seq[EnumDefAnnotation], corrects: Seq[CorrectDefAnno]): Boolean = {
    corrects.forall(c => annos.exists(isCorrect(_, c))) &&
    correctDefAnnos.length == annos.length
  }

  // Because temporary variables might be formed and annotated, we do not check that every component or vector
  // annotation is accounted for in the correct results listed above
  def allCorrectComps(annos: Seq[EnumComponentAnnotation], corrects: Seq[CorrectCompAnno]): Boolean =
    corrects.forall(c => annos.exists(isCorrect(_, c)))

  def allCorrectVecs(annos: Seq[EnumVecAnnotation], corrects: Seq[CorrectVecAnno]): Boolean =
    corrects.forall(c => annos.exists(isCorrect(_, c)))

  def test(strongEnumAnnotatorGen: () => Module) {
    val annos = (new ChiselStage).execute(
      Array("--target-dir", "test_run_dir", "--no-run-firrtl"),
      Seq(ChiselGeneratorAnnotation(strongEnumAnnotatorGen))
    )

    val enumDefAnnos = annos.collect { case a: EnumDefAnnotation => a }
    val enumCompAnnos = annos.collect { case a: EnumComponentAnnotation => a }
    val enumVecAnnos = annos.collect { case a: EnumVecAnnotation => a }

    allCorrectDefs(enumDefAnnos, correctDefAnnos) should be(true)
    allCorrectComps(enumCompAnnos, correctCompAnnos) should be(true)
    allCorrectVecs(enumVecAnnos, correctVecAnnos) should be(true)

  }

  "Test that strong enums annotate themselves appropriately" in {
    test(() => new StrongEnumAnnotator)
    test(() => new StrongEnumAnnotatorWithChiselName)
  }
}