fix union type names (#5902)

* fix union type names

* fix up generation and test

* format

* update codegen

7 files changed, 103 insertions, 45 deletions

diff --git a/dart/test/flat_buffers_test.dart b/dart/test/flat_buffers_test.dart
index f9c5e01c..0fe652d0 100644
--- a/dart/test/flat_buffers_test.dart
+++ b/dart/test/flat_buffers_test.dart
@@ -30,8 +30,7 @@ class CheckOtherLangaugesData {
     List<int> data = await new io.File(path.join(
       path.dirname(io.Platform.script.path),
       'monsterdata_test.mon',
-    ))
-        .readAsBytes();
+    )).readAsBytes();
     example.Monster mon = new example.Monster(data);
     expect(mon.hp, 80);
     expect(mon.mana, 150);
@@ -58,8 +57,71 @@ class CheckOtherLangaugesData {
     expect(mon.testarrayofstring[1], "test2");
 
     // this will fail if accessing any field fails.
-    expect(mon.toString(),
-        'Monster{pos: Vec3{x: 1.0, y: 2.0, z: 3.0, test1: 3.0, test2: Color{value: 2}, test3: Test{a: 5, b: 6}}, mana: 150, hp: 80, name: MyMonster, inventory: [0, 1, 2, 3, 4], color: Color{value: 8}, testType: AnyTypeId{value: 1}, test: Monster{pos: null, mana: 150, hp: 100, name: Fred, inventory: null, color: Color{value: 8}, testType: AnyTypeId{value: 0}, test: null, test4: null, testarrayofstring: null, testarrayoftables: null, enemy: null, testnestedflatbuffer: null, testempty: null, testbool: false, testhashs32Fnv1: 0, testhashu32Fnv1: 0, testhashs64Fnv1: 0, testhashu64Fnv1: 0, testhashs32Fnv1a: 0, testhashu32Fnv1a: 0, testhashs64Fnv1a: 0, testhashu64Fnv1a: 0, testarrayofbools: null, testf: 3.14159, testf2: 3.0, testf3: 0.0, testarrayofstring2: null, testarrayofsortedstruct: null, flex: null, test5: null, vectorOfLongs: null, vectorOfDoubles: null, parentNamespaceTest: null, vectorOfReferrables: null, singleWeakReference: 0, vectorOfWeakReferences: null, vectorOfStrongReferrables: null, coOwningReference: 0, vectorOfCoOwningReferences: null, nonOwningReference: 0, vectorOfNonOwningReferences: null}, test4: [Test{a: 10, b: 20}, Test{a: 30, b: 40}], testarrayofstring: [test1, test2], testarrayoftables: null, enemy: Monster{pos: null, mana: 150, hp: 100, name: Fred, inventory: null, color: Color{value: 8}, testType: AnyTypeId{value: 0}, test: null, test4: null, testarrayofstring: null, testarrayoftables: null, enemy: null, testnestedflatbuffer: null, testempty: null, testbool: false, testhashs32Fnv1: 0, testhashu32Fnv1: 0, testhashs64Fnv1: 0, testhashu64Fnv1: 0, testhashs32Fnv1a: 0, testhashu32Fnv1a: 0, testhashs64Fnv1a: 0, testhashu64Fnv1a: 0, testarrayofbools: null, testf: 3.14159, testf2: 3.0, testf3: 0.0, testarrayofstring2: null, testarrayofsortedstruct: null, flex: null, test5: null, vectorOfLongs: null, vectorOfDoubles: null, parentNamespaceTest: null, vectorOfReferrables: null, singleWeakReference: 0, vectorOfWeakReferences: null, vectorOfStrongReferrables: null, coOwningReference: 0, vectorOfCoOwningReferences: null, nonOwningReference: 0, vectorOfNonOwningReferences: null}, testnestedflatbuffer: null, testempty: null, testbool: false, testhashs32Fnv1: -579221183, testhashu32Fnv1: 3715746113, testhashs64Fnv1: 7930699090847568257, testhashu64Fnv1: 7930699090847568257, testhashs32Fnv1a: -1904106383, testhashu32Fnv1a: 2390860913, testhashs64Fnv1a: 4898026182817603057, testhashu64Fnv1a: 4898026182817603057, testarrayofbools: [true, false, true], testf: 3.14159, testf2: 3.0, testf3: 0.0, testarrayofstring2: null, testarrayofsortedstruct: null, flex: null, test5: [Test{a: 10, b: 20}, Test{a: 30, b: 40}], vectorOfLongs: [1, 100, 10000, 1000000, 100000000], vectorOfDoubles: [-1.7976931348623157e+308, 0.0, 1.7976931348623157e+308], parentNamespaceTest: null, vectorOfReferrables: null, singleWeakReference: 0, vectorOfWeakReferences: null, vectorOfStrongReferrables: null, coOwningReference: 0, vectorOfCoOwningReferences: null, nonOwningReference: 0, vectorOfNonOwningReferences: null}');
+    expect(
+      mon.toString(),
+      'Monster{'
+      'pos: Vec3{x: 1.0, y: 2.0, z: 3.0, test1: 3.0, test2: Color{value: 2}, test3: Test{a: 5, b: 6}}, '
+      'mana: 150, hp: 80, name: MyMonster, inventory: [0, 1, 2, 3, 4], '
+      'color: Color{value: 8}, testType: AnyTypeId{value: 1}, '
+      'test: Monster{pos: null, mana: 150, hp: 100, name: Fred, '
+      'inventory: null, color: Color{value: 8}, testType: AnyTypeId{value: 0}, '
+      'test: null, test4: null, testarrayofstring: null, '
+      'testarrayoftables: null, enemy: null, testnestedflatbuffer: null, '
+      'testempty: null, testbool: false, testhashs32Fnv1: 0, '
+      'testhashu32Fnv1: 0, testhashs64Fnv1: 0, testhashu64Fnv1: 0, '
+      'testhashs32Fnv1a: 0, testhashu32Fnv1a: 0, testhashs64Fnv1a: 0, '
+      'testhashu64Fnv1a: 0, testarrayofbools: null, testf: 3.14159, '
+      'testf2: 3.0, testf3: 0.0, testarrayofstring2: null, '
+      'testarrayofsortedstruct: null, flex: null, test5: null, '
+      'vectorOfLongs: null, vectorOfDoubles: null, parentNamespaceTest: null, '
+      'vectorOfReferrables: null, singleWeakReference: 0, '
+      'vectorOfWeakReferences: null, vectorOfStrongReferrables: null, '
+      'coOwningReference: 0, vectorOfCoOwningReferences: null, '
+      'nonOwningReference: 0, vectorOfNonOwningReferences: null, '
+      'anyUniqueType: AnyUniqueAliasesTypeId{value: 0}, anyUnique: null, '
+      'anyAmbiguousType: AnyAmbiguousAliasesTypeId{value: 0}, '
+      'anyAmbiguous: null, vectorOfEnums: null, signedEnum: Race{value: -1}}, '
+      'test4: [Test{a: 10, b: 20}, Test{a: 30, b: 40}], '
+      'testarrayofstring: [test1, test2], testarrayoftables: null, '
+      'enemy: Monster{pos: null, mana: 150, hp: 100, name: Fred, '
+      'inventory: null, color: Color{value: 8}, testType: AnyTypeId{value: 0}, '
+      'test: null, test4: null, testarrayofstring: null, '
+      'testarrayoftables: null, enemy: null, testnestedflatbuffer: null, '
+      'testempty: null, testbool: false, testhashs32Fnv1: 0, '
+      'testhashu32Fnv1: 0, testhashs64Fnv1: 0, testhashu64Fnv1: 0, '
+      'testhashs32Fnv1a: 0, testhashu32Fnv1a: 0, testhashs64Fnv1a: 0, '
+      'testhashu64Fnv1a: 0, testarrayofbools: null, testf: 3.14159, '
+      'testf2: 3.0, testf3: 0.0, testarrayofstring2: null, '
+      'testarrayofsortedstruct: null, flex: null, test5: null, '
+      'vectorOfLongs: null, vectorOfDoubles: null, parentNamespaceTest: null, '
+      'vectorOfReferrables: null, singleWeakReference: 0, '
+      'vectorOfWeakReferences: null, vectorOfStrongReferrables: null, '
+      'coOwningReference: 0, vectorOfCoOwningReferences: null, '
+      'nonOwningReference: 0, vectorOfNonOwningReferences: null, '
+      'anyUniqueType: AnyUniqueAliasesTypeId{value: 0}, anyUnique: null, '
+      'anyAmbiguousType: AnyAmbiguousAliasesTypeId{value: 0}, '
+      'anyAmbiguous: null, vectorOfEnums: null, signedEnum: Race{value: -1}}, '
+      'testnestedflatbuffer: null, testempty: null, testbool: true, '
+      'testhashs32Fnv1: -579221183, testhashu32Fnv1: 3715746113, '
+      'testhashs64Fnv1: 7930699090847568257, '
+      'testhashu64Fnv1: 7930699090847568257, '
+      'testhashs32Fnv1a: -1904106383, testhashu32Fnv1a: 2390860913, '
+      'testhashs64Fnv1a: 4898026182817603057, '
+      'testhashu64Fnv1a: 4898026182817603057, '
+      'testarrayofbools: [true, false, true], testf: 3.14159, testf2: 3.0, '
+      'testf3: 0.0, testarrayofstring2: null, testarrayofsortedstruct: null, '
+      'flex: null, test5: [Test{a: 10, b: 20}, Test{a: 30, b: 40}], '
+      'vectorOfLongs: [1, 100, 10000, 1000000, 100000000], '
+      'vectorOfDoubles: [-1.7976931348623157e+308, 0.0, 1.7976931348623157e+308], '
+      'parentNamespaceTest: null, vectorOfReferrables: null, '
+      'singleWeakReference: 0, vectorOfWeakReferences: null, '
+      'vectorOfStrongReferrables: null, coOwningReference: 0, '
+      'vectorOfCoOwningReferences: null, nonOwningReference: 0, '
+      'vectorOfNonOwningReferences: null, '
+      'anyUniqueType: AnyUniqueAliasesTypeId{value: 0}, anyUnique: null, '
+      'anyAmbiguousType: AnyAmbiguousAliasesTypeId{value: 0}, '
+      'anyAmbiguous: null, vectorOfEnums: null, signedEnum: Race{value: -1}}',
+    );
   }
 }
 
@@ -88,7 +150,6 @@ class BuilderTest {
     testBuilder.finish(30, 40);
     final test4 = fbBuilder.endStructVector(2);
 
-
     monBuilder
       ..begin()
       ..addPos(
@@ -167,8 +228,8 @@ class BuilderTest {
     expect(byteData.getUint8(6), 126); // '~'
     expect(byteData.getUint8(7), 255); // 'ÿ'
     // First 4 bytes of the table data are a backwards offset to the vtable.
-    int vTableLoc = tableDataLoc -
-        byteData.getInt32(tableDataLoc, Endian.little);
+    int vTableLoc =
+        tableDataLoc - byteData.getInt32(tableDataLoc, Endian.little);
     // First 2 bytes of the vtable are the size of the vtable in bytes, which
     // should be 4.
     expect(byteData.getUint16(vTableLoc, Endian.little), 4);
@@ -231,8 +292,8 @@ class BuilderTest {
     // First 4 bytes are an offset to the table data.
     int tableDataLoc = byteData.getUint32(0, Endian.little);
     // First 4 bytes of the table data are a backwards offset to the vtable.
-    int vTableLoc = tableDataLoc -
-        byteData.getInt32(tableDataLoc, Endian.little);
+    int vTableLoc =
+        tableDataLoc - byteData.getInt32(tableDataLoc, Endian.little);
     // First 2 bytes of the vtable are the size of the vtable in bytes, which
     // should be 10.
     expect(byteData.getUint16(vTableLoc, Endian.little), 10);
@@ -242,10 +303,9 @@ class BuilderTest {
     // Remaining 6 bytes are the offsets within the object where the ints are
     // located.
     for (int i = 0; i < 3; i++) {
-      int offset =
-          byteData.getUint16(vTableLoc + 4 + 2 * i, Endian.little);
-      expect(byteData.getInt32(tableDataLoc + offset, Endian.little),
-          10 + 10 * i);
+      int offset = byteData.getUint16(vTableLoc + 4 + 2 * i, Endian.little);
+      expect(
+          byteData.getInt32(tableDataLoc + offset, Endian.little), 10 + 10 * i);
     }
   }
 
diff --git a/dart/test/monster_test_my_game.example2_generated.dart b/dart/test/monster_test_my_game.example2_generated.dart
index 9a3ab662..eed14bc2 100644
--- a/dart/test/monster_test_my_game.example2_generated.dart
+++ b/dart/test/monster_test_my_game.example2_generated.dart
@@ -6,8 +6,6 @@ library my_game.example2;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import 'include_test1_my_game.example2_generated.dart';
-import 'include_test2_my_game.example2_generated.dart';
 import './monster_test_my_game_generated.dart' as my_game;
 import './monster_test_my_game.example_generated.dart' as my_game_example;
 
diff --git a/dart/test/monster_test_my_game.example_generated.dart b/dart/test/monster_test_my_game.example_generated.dart
index 4bc9b9c2..4fc2d242 100644
--- a/dart/test/monster_test_my_game.example_generated.dart
+++ b/dart/test/monster_test_my_game.example_generated.dart
@@ -6,8 +6,6 @@ library my_game.example;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import 'include_test1_my_game.example_generated.dart';
-import 'include_test2_my_game.example_generated.dart';
 import './monster_test_my_game_generated.dart' as my_game;
 import './monster_test_my_game.example2_generated.dart' as my_game_example2;
 
@@ -719,7 +717,7 @@ class ReferrableObjectBuilder extends fb.ObjectBuilder {
     return fbBuilder.finish(offset, fileIdentifier);
   }
 }
-///  an example documentation comment: monster object
+///  an example documentation comment: "monster object"
 class Monster {
   Monster._(this._bc, this._bcOffset);
   factory Monster(List<int> bytes) {
@@ -786,18 +784,18 @@ class Monster {
   AnyUniqueAliasesTypeId get anyUniqueType => new AnyUniqueAliasesTypeId.fromValue(const fb.Uint8Reader().vTableGet(_bc, _bcOffset, 90, 0));
   dynamic get anyUnique {
     switch (anyUniqueType?.value) {
-      case 1: return M.reader.vTableGet(_bc, _bcOffset, 92, null);
-      case 2: return TS.reader.vTableGet(_bc, _bcOffset, 92, null);
-      case 3: return M2.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 1: return Monster.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 2: return TestSimpleTableWithEnum.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 3: return my_game_example2.Monster.reader.vTableGet(_bc, _bcOffset, 92, null);
       default: return null;
     }
   }
   AnyAmbiguousAliasesTypeId get anyAmbiguousType => new AnyAmbiguousAliasesTypeId.fromValue(const fb.Uint8Reader().vTableGet(_bc, _bcOffset, 94, 0));
   dynamic get anyAmbiguous {
     switch (anyAmbiguousType?.value) {
-      case 1: return M1.reader.vTableGet(_bc, _bcOffset, 96, null);
-      case 2: return M2.reader.vTableGet(_bc, _bcOffset, 96, null);
-      case 3: return M3.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 1: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 2: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 3: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
       default: return null;
     }
   }
diff --git a/dart/test/monster_test_my_game_generated.dart b/dart/test/monster_test_my_game_generated.dart
index 26bb73bb..abd538c4 100644
--- a/dart/test/monster_test_my_game_generated.dart
+++ b/dart/test/monster_test_my_game_generated.dart
@@ -6,8 +6,6 @@ library my_game;
 import 'dart:typed_data' show Uint8List;
 import 'package:flat_buffers/flat_buffers.dart' as fb;
 
-import 'include_test1_my_game_generated.dart';
-import 'include_test2_my_game_generated.dart';
 import './monster_test_my_game.example_generated.dart' as my_game_example;
 import './monster_test_my_game.example2_generated.dart' as my_game_example2;
 
diff --git a/src/idl_gen_dart.cpp b/src/idl_gen_dart.cpp
index c2b1e42d..8053dbfb 100644
--- a/src/idl_gen_dart.cpp
+++ b/src/idl_gen_dart.cpp
@@ -473,17 +473,20 @@ class DartGenerator : public BaseGenerator {
     (*namespace_code)[object_namespace] += code;
   }
 
-  std::string NamespaceAliasFromUnionType(const std::string &in) {
-    if (in.find('_') == std::string::npos) { return in; }
+  std::string NamespaceAliasFromUnionType(Namespace *root_namespace,
+                                          const Type &type) {
+    const std::vector<std::string> qualified_name_parts =
+        type.struct_def->defined_namespace->components;
+    if (std::equal(root_namespace->components.begin(),
+                   root_namespace->components.end(),
+                   qualified_name_parts.begin())) {
+      return type.struct_def->name;
+    }
 
-    std::stringstream ss(in);
-    std::string item;
-    std::vector<std::string> parts;
     std::string ns;
 
-    while (std::getline(ss, item, '_')) { parts.push_back(item); }
-
-    for (auto it = parts.begin(); it != parts.end() - 1; ++it) {
+    for (auto it = qualified_name_parts.begin();
+         it != qualified_name_parts.end(); ++it) {
       auto &part = *it;
 
       for (size_t i = 0; i < part.length(); i++) {
@@ -495,10 +498,10 @@ class DartGenerator : public BaseGenerator {
           ns += static_cast<char>(tolower(part[i]));
         }
       }
-      if (it != parts.end() - 2) { ns += "_"; }
+      if (it != qualified_name_parts.end() - 1) { ns += "_"; }
     }
 
-    return ns + "." + parts.back();
+    return ns + "." + type.struct_def->name;
   }
 
   void GenImplementationGetters(
@@ -527,7 +530,8 @@ class DartGenerator : public BaseGenerator {
              en_it != enum_def.Vals().end(); ++en_it) {
           auto &ev = **en_it;
 
-          auto enum_name = NamespaceAliasFromUnionType(ev.name);
+          auto enum_name = NamespaceAliasFromUnionType(
+              enum_def.defined_namespace, ev.union_type);
           code += "      case " + enum_def.ToString(ev) + ": return " +
                   enum_name + ".reader.vTableGet(_bc, _bcOffset, " +
                   NumToString(field.value.offset) + ", null);\n";
diff --git a/tests/DartTest.sh b/tests/DartTest.sh
index 6ce72cc7..e83bf7d1 100755
--- a/tests/DartTest.sh
+++ b/tests/DartTest.sh
@@ -18,9 +18,9 @@ pushd "$(dirname $0)" >/dev/null
 
 command -v pub >/dev/null 2>&1 || { echo >&2 "Dart tests require `pub` but it's not installed.  Aborting."; exit 1; }
 command -v dart >/dev/null 2>&1 || { echo >&2 "Dart tests require dart to be in path but it's not installed.  Aborting."; exit 1; }
-# output required files to the dart folder so that pub will be able to 
+# output required files to the dart folder so that pub will be able to
 # distribute them and more people can more easily run the dart tests
-../flatc --dart -I include_test -o ../dart/test monster_test.fbs 
+../flatc --dart --no-includes -I include_test -o ../dart/test monster_test.fbs
 cp monsterdata_test.mon ../dart/test
 
 cd ../dart
diff --git a/tests/monster_test_my_game.example_generated.dart b/tests/monster_test_my_game.example_generated.dart
index 2ad2c952..4fc2d242 100644
--- a/tests/monster_test_my_game.example_generated.dart
+++ b/tests/monster_test_my_game.example_generated.dart
@@ -784,18 +784,18 @@ class Monster {
   AnyUniqueAliasesTypeId get anyUniqueType => new AnyUniqueAliasesTypeId.fromValue(const fb.Uint8Reader().vTableGet(_bc, _bcOffset, 90, 0));
   dynamic get anyUnique {
     switch (anyUniqueType?.value) {
-      case 1: return M.reader.vTableGet(_bc, _bcOffset, 92, null);
-      case 2: return TS.reader.vTableGet(_bc, _bcOffset, 92, null);
-      case 3: return M2.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 1: return Monster.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 2: return TestSimpleTableWithEnum.reader.vTableGet(_bc, _bcOffset, 92, null);
+      case 3: return my_game_example2.Monster.reader.vTableGet(_bc, _bcOffset, 92, null);
       default: return null;
     }
   }
   AnyAmbiguousAliasesTypeId get anyAmbiguousType => new AnyAmbiguousAliasesTypeId.fromValue(const fb.Uint8Reader().vTableGet(_bc, _bcOffset, 94, 0));
   dynamic get anyAmbiguous {
     switch (anyAmbiguousType?.value) {
-      case 1: return M1.reader.vTableGet(_bc, _bcOffset, 96, null);
-      case 2: return M2.reader.vTableGet(_bc, _bcOffset, 96, null);
-      case 3: return M3.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 1: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 2: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
+      case 3: return Monster.reader.vTableGet(_bc, _bcOffset, 96, null);
       default: return null;
     }
   }