Remove "Is" tests

These originate from a time before Castable, and there were hand-written Is<T>() methods on each of the base types.

Castable has its own tests that ensure the Is<T>() and As<T>() work as expected.
We don't need to check that this logic works for every type that derives from castable.

Change-Id: Iaa376dc4b4b5ee413a83fc5f9113cd3ef91dfe4a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50540
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>

src/ast/access_control_test.cc

@@ -41,24 +41,6 @@ TEST_F(AstAccessControlTest, Create) {
   EXPECT_EQ(a->type(), u32);
 }
 
-TEST_F(AstAccessControlTest, Is) {
-  auto* i32 = create<I32>();
-  Type* ty = create<AccessControl>(AccessControl::kReadOnly, i32);
-  EXPECT_TRUE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstAccessControlTest, AccessRead) {
   auto* i32 = create<I32>();
   auto* ac = create<AccessControl>(AccessControl::kReadOnly, i32);

src/ast/access_decoration_test.cc

@@ -27,11 +27,6 @@ TEST_F(AccessDecorationTest, Creation) {
   EXPECT_EQ(ast::AccessControl::kWriteOnly, d->value());
 }
 
-TEST_F(AccessDecorationTest, Is) {
-  auto* d = create<AccessDecoration>(ast::AccessControl::kReadWrite);
-  EXPECT_TRUE(d->Is<ast::AccessDecoration>());
-}
-
 TEST_F(AccessDecorationTest, ToStr) {
   auto* d = create<AccessDecoration>(ast::AccessControl::kReadOnly);
   EXPECT_EQ(str(d), R"(AccessDecoration{read_only}

src/ast/alias_test.cc

@@ -40,23 +40,6 @@ TEST_F(AstAliasTest, Create) {
   EXPECT_EQ(a->type(), u32);
 }
 
-TEST_F(AstAliasTest, Is) {
-  Type* ty = create<Alias>(Sym("a"), create<I32>());
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_TRUE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 // Check for linear-time evaluation of Alias::type_name().
 // If type_name() is non-linear, this test should noticeably stall.
 // See: crbug.com/1200936

src/ast/array_test.cc

@@ -51,24 +51,6 @@ TEST_F(AstArrayTest, CreateRuntimeArray) {
   EXPECT_TRUE(arr->IsRuntimeArray());
 }
 
-TEST_F(AstArrayTest, Is) {
-  auto* i32 = create<I32>();
-  Type* ty = create<Array>(i32, 3, DecorationList{});
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_TRUE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstArrayTest, TypeName) {
   auto* i32 = create<I32>();
   auto* arr = create<Array>(i32, 0, DecorationList{});

src/ast/binding_decoration_test.cc

@@ -26,15 +26,6 @@ TEST_F(BindingDecorationTest, Creation) {
   EXPECT_EQ(2u, d->value());
 }
 
-TEST_F(BindingDecorationTest, Is) {
-  Decoration* d = create<BindingDecoration>(2);
-  EXPECT_TRUE(d->Is<BindingDecoration>());
-  EXPECT_FALSE(d->Is<BuiltinDecoration>());
-  EXPECT_FALSE(d->Is<OverrideDecoration>());
-  EXPECT_FALSE(d->Is<LocationDecoration>());
-  EXPECT_FALSE(d->Is<GroupDecoration>());
-}
-
 TEST_F(BindingDecorationTest, ToStr) {
   auto* d = create<BindingDecoration>(2);
   EXPECT_EQ(str(d), R"(BindingDecoration{2}

src/ast/bool_literal_test.cc

@@ -34,15 +34,6 @@ TEST_F(BoolLiteralTest, False) {
   ASSERT_TRUE(b->IsFalse());
 }
 
-TEST_F(BoolLiteralTest, Is) {
-  ast::Literal* l = create<BoolLiteral>(false);
-  EXPECT_TRUE(l->Is<BoolLiteral>());
-  EXPECT_FALSE(l->Is<SintLiteral>());
-  EXPECT_FALSE(l->Is<FloatLiteral>());
-  EXPECT_FALSE(l->Is<UintLiteral>());
-  EXPECT_FALSE(l->Is<IntLiteral>());
-}
-
 TEST_F(BoolLiteralTest, ToStr) {
   auto* t = create<BoolLiteral>(true);
   auto* f = create<BoolLiteral>(false);

src/ast/bool_test.cc

@@ -33,23 +33,6 @@ namespace {
 
 using AstBoolTest = TestHelper;
 
-TEST_F(AstBoolTest, Is) {
-  Type* ty = create<Bool>();
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_TRUE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstBoolTest, TypeName) {
   auto* b = create<Bool>();
   EXPECT_EQ(b->type_name(), "__bool");

src/ast/builtin_decoration_test.cc

@@ -26,15 +26,6 @@ TEST_F(BuiltinDecorationTest, Creation) {
   EXPECT_EQ(Builtin::kFragDepth, d->value());
 }
 
-TEST_F(BuiltinDecorationTest, Is) {
-  Decoration* d = create<BuiltinDecoration>(Builtin::kFragDepth);
-  EXPECT_FALSE(d->Is<BindingDecoration>());
-  EXPECT_TRUE(d->Is<BuiltinDecoration>());
-  EXPECT_FALSE(d->Is<OverrideDecoration>());
-  EXPECT_FALSE(d->Is<LocationDecoration>());
-  EXPECT_FALSE(d->Is<GroupDecoration>());
-}
-
 TEST_F(BuiltinDecorationTest, ToStr) {
   auto* d = create<BuiltinDecoration>(Builtin::kFragDepth);
   EXPECT_EQ(str(d), R"(BuiltinDecoration{frag_depth}

src/ast/depth_texture_test.cc

@@ -36,23 +36,6 @@ namespace {
 
 using AstDepthTextureTest = TestHelper;
 
-TEST_F(AstDepthTextureTest, Is) {
-  Type* ty = create<DepthTexture>(TextureDimension::kCube);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_TRUE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstDepthTextureTest, IsTexture) {
   Texture* ty = create<DepthTexture>(TextureDimension::kCube);
   EXPECT_TRUE(ty->Is<DepthTexture>());

src/ast/external_texture_test.cc

@@ -37,23 +37,6 @@ namespace {
 
 using AstExternalTextureTest = TestHelper;
 
-TEST_F(AstExternalTextureTest, Is) {
-  Type* ty = create<ExternalTexture>();
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_TRUE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstExternalTextureTest, IsTexture) {
   Texture* ty = create<ExternalTexture>();
   EXPECT_FALSE(ty->Is<DepthTexture>());

src/ast/f32_test.cc

@@ -33,23 +33,6 @@ namespace {
 
 using AstF32Test = TestHelper;
 
-TEST_F(AstF32Test, Is) {
-  Type* ty = create<F32>();
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_TRUE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstF32Test, TypeName) {
   auto* f = create<F32>();
   EXPECT_EQ(f->type_name(), "__f32");

src/ast/float_literal_test.cc

@@ -26,15 +26,6 @@ TEST_F(FloatLiteralTest, Value) {
   EXPECT_EQ(f->value(), 47.2f);
 }
 
-TEST_F(FloatLiteralTest, Is) {
-  ast::Literal* l = create<FloatLiteral>(42.f);
-  EXPECT_FALSE(l->Is<BoolLiteral>());
-  EXPECT_FALSE(l->Is<SintLiteral>());
-  EXPECT_FALSE(l->Is<IntLiteral>());
-  EXPECT_TRUE(l->Is<FloatLiteral>());
-  EXPECT_FALSE(l->Is<UintLiteral>());
-}
-
 TEST_F(FloatLiteralTest, ToStr) {
   auto* f = create<FloatLiteral>(42.1f);
   EXPECT_EQ(str(f), "42.099998");

src/ast/group_decoration_test.cc

@@ -26,14 +26,6 @@ TEST_F(GroupDecorationTest, Creation) {
   EXPECT_EQ(2u, d->value());
 }
 
-TEST_F(GroupDecorationTest, Is) {
-  Decoration* d = create<GroupDecoration>(2);
-  EXPECT_FALSE(d->Is<BindingDecoration>());
-  EXPECT_FALSE(d->Is<BuiltinDecoration>());
-  EXPECT_FALSE(d->Is<OverrideDecoration>());
-  EXPECT_FALSE(d->Is<LocationDecoration>());
-  EXPECT_TRUE(d->Is<GroupDecoration>());
-}
 
 TEST_F(GroupDecorationTest, ToStr) {
   auto* d = create<GroupDecoration>(2);

src/ast/i32_test.cc

@@ -34,23 +34,6 @@ namespace {
 
 using AstI32Test = TestHelper;
 
-TEST_F(AstI32Test, Is) {
-  Type* ty = create<I32>();
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_TRUE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstI32Test, TypeName) {
   auto* i = create<I32>();
   EXPECT_EQ(i->type_name(), "__i32");

src/ast/location_decoration_test.cc

@@ -26,15 +26,6 @@ TEST_F(LocationDecorationTest, Creation) {
   EXPECT_EQ(2u, d->value());
 }
 
-TEST_F(LocationDecorationTest, Is) {
-  Decoration* d = create<LocationDecoration>(2);
-  EXPECT_FALSE(d->Is<BindingDecoration>());
-  EXPECT_FALSE(d->Is<BuiltinDecoration>());
-  EXPECT_FALSE(d->Is<OverrideDecoration>());
-  EXPECT_TRUE(d->Is<LocationDecoration>());
-  EXPECT_FALSE(d->Is<GroupDecoration>());
-}
-
 TEST_F(LocationDecorationTest, ToStr) {
   auto* d = create<LocationDecoration>(2);
   EXPECT_EQ(str(d), R"(LocationDecoration{2}

src/ast/matrix_test.cc

@@ -41,24 +41,6 @@ TEST_F(AstMatrixTest, Creation) {
   EXPECT_EQ(m->columns(), 4u);
 }
 
-TEST_F(AstMatrixTest, Is) {
-  auto* i32 = create<I32>();
-  Type* ty = create<Matrix>(i32, 2, 3);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_TRUE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstMatrixTest, TypeName) {
   auto* i32 = create<I32>();
   auto* m = create<Matrix>(i32, 2, 3);

src/ast/multisampled_texture_test.cc

@@ -38,24 +38,6 @@ namespace {
 
 using AstMultisampledTextureTest = TestHelper;
 
-TEST_F(AstMultisampledTextureTest, Is) {
-  auto* f32 = create<F32>();
-  Type* ty = create<MultisampledTexture>(TextureDimension::kCube, f32);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_TRUE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstMultisampledTextureTest, IsTexture) {
   auto* f32 = create<F32>();
   Texture* ty = create<MultisampledTexture>(TextureDimension::kCube, f32);

src/ast/override_decoration_test.cc

@@ -27,15 +27,6 @@ TEST_F(OverrideDecorationTest, Creation) {
   EXPECT_EQ(12u, d->value());
 }
 
-TEST_F(OverrideDecorationTest, Is) {
-  Decoration* d = create<OverrideDecoration>(27);
-  EXPECT_FALSE(d->Is<BindingDecoration>());
-  EXPECT_FALSE(d->Is<BuiltinDecoration>());
-  EXPECT_TRUE(d->Is<OverrideDecoration>());
-  EXPECT_FALSE(d->Is<LocationDecoration>());
-  EXPECT_FALSE(d->Is<GroupDecoration>());
-}
-
 TEST_F(OverrideDecorationTest, ToStr) {
   auto* d = create<OverrideDecoration>(1200);
   EXPECT_EQ(str(d), R"(OverrideDecoration{1200}

src/ast/pointer_test.cc

@@ -40,24 +40,6 @@ TEST_F(AstPointerTest, Creation) {
   EXPECT_EQ(p->storage_class(), ast::StorageClass::kStorage);
 }
 
-TEST_F(AstPointerTest, Is) {
-  auto* i32 = create<I32>();
-  Type* ty = create<Pointer>(i32, ast::StorageClass::kFunction);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_TRUE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstPointerTest, TypeName) {
   auto* i32 = create<I32>();
   auto* p = create<Pointer>(i32, ast::StorageClass::kWorkgroup);

src/ast/sampled_texture_test.cc

@@ -37,24 +37,6 @@ namespace {
 
 using AstSampledTextureTest = TestHelper;
 
-TEST_F(AstSampledTextureTest, Is) {
-  auto* f32 = create<F32>();
-  Type* ty = create<SampledTexture>(TextureDimension::kCube, f32);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_TRUE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstSampledTextureTest, IsTexture) {
   auto* f32 = create<F32>();
   Texture* ty = create<SampledTexture>(TextureDimension::kCube, f32);

src/ast/sampler_test.cc

@@ -44,23 +44,6 @@ TEST_F(AstSamplerTest, Creation_ComparisonSampler) {
   EXPECT_TRUE(s->IsComparison());
 }
 
-TEST_F(AstSamplerTest, Is) {
-  Type* ty = create<Sampler>(SamplerKind::kSampler);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_TRUE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstSamplerTest, TypeName_Sampler) {
   auto* s = create<Sampler>(SamplerKind::kSampler);
   EXPECT_EQ(s->type_name(), "__sampler_sampler");

src/ast/sint_literal_test.cc

@@ -26,14 +26,6 @@ TEST_F(SintLiteralTest, Value) {
   EXPECT_EQ(i->value(), 47);
 }
 
-TEST_F(SintLiteralTest, Is) {
-  ast::Literal* l = create<SintLiteral>(42);
-  EXPECT_FALSE(l->Is<BoolLiteral>());
-  EXPECT_TRUE(l->Is<SintLiteral>());
-  EXPECT_FALSE(l->Is<FloatLiteral>());
-  EXPECT_FALSE(l->Is<UintLiteral>());
-}
-
 TEST_F(SintLiteralTest, ToStr) {
   auto* i = create<SintLiteral>(-42);
   EXPECT_EQ(str(i), "-42");

src/ast/stage_decoration_test.cc

@@ -28,12 +28,6 @@ TEST_F(StageDecorationTest, Creation_1param) {
   EXPECT_EQ(d->value(), PipelineStage::kFragment);
 }
 
-TEST_F(StageDecorationTest, Is) {
-  Decoration* d = create<StageDecoration>(PipelineStage::kFragment);
-  EXPECT_FALSE(d->Is<WorkgroupDecoration>());
-  EXPECT_TRUE(d->Is<StageDecoration>());
-}
-
 TEST_F(StageDecorationTest, ToStr) {
   auto* d = create<StageDecoration>(PipelineStage::kFragment);
   EXPECT_EQ(str(d), R"(StageDecoration{fragment}

src/ast/storage_texture_test.cc

@@ -36,25 +36,6 @@ namespace {
 
 using AstStorageTextureTest = TestHelper;
 
-TEST_F(AstStorageTextureTest, Is) {
-  auto* subtype = StorageTexture::SubtypeFor(ImageFormat::kRgba32Float, *this);
-  Type* ty = create<StorageTexture>(TextureDimension::k2dArray,
-                                    ImageFormat::kRgba32Float, subtype);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_TRUE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstStorageTextureTest, IsTexture) {
   auto* subtype = StorageTexture::SubtypeFor(ImageFormat::kRgba32Float, *this);
   Texture* ty = create<StorageTexture>(TextureDimension::k2dArray,

src/ast/stride_decoration_test.cc

@@ -25,10 +25,6 @@ TEST_F(StrideDecorationTest, Creation) {
   EXPECT_EQ(2u, d->stride());
 }
 
-TEST_F(StrideDecorationTest, Is) {
-  auto* d = create<StrideDecoration>(2);
-  EXPECT_TRUE(d->Is<StrideDecoration>());
-}
 
 TEST_F(StrideDecorationTest, Source) {
   auto* d = create<StrideDecoration>(

src/ast/struct_member_align_decoration_test.cc

@@ -27,11 +27,6 @@ TEST_F(StructMemberAlignDecorationTest, Creation) {
   EXPECT_EQ(2u, d->align());
 }
 
-TEST_F(StructMemberAlignDecorationTest, Is) {
-  auto* d = create<StructMemberAlignDecoration>(2);
-  EXPECT_TRUE(d->Is<StructMemberAlignDecoration>());
-}
-
 }  // namespace
 }  // namespace ast
 }  // namespace tint

src/ast/struct_member_offset_decoration_test.cc

@@ -25,11 +25,6 @@ TEST_F(StructMemberOffsetDecorationTest, Creation) {
   EXPECT_EQ(2u, d->offset());
 }
 
-TEST_F(StructMemberOffsetDecorationTest, Is) {
-  auto* d = create<StructMemberOffsetDecoration>(2);
-  EXPECT_TRUE(d->Is<StructMemberOffsetDecoration>());
-}
-
 }  // namespace
 }  // namespace ast
 }  // namespace tint

src/ast/struct_member_size_decoration_test.cc

@@ -27,11 +27,6 @@ TEST_F(StructMemberOffsetDecorationTest, Creation) {
   EXPECT_EQ(2u, d->size());
 }
 
-TEST_F(StructMemberOffsetDecorationTest, Is) {
-  auto* d = create<StructMemberSizeDecoration>(2);
-  EXPECT_TRUE(d->Is<StructMemberSizeDecoration>());
-}
-
 }  // namespace
 }  // namespace ast
 }  // namespace tint

src/ast/struct_test.cc

@@ -137,24 +137,6 @@ TEST_F(AstStructTest, ToStr) {
 )");
 }
 
-TEST_F(AstStructTest, Is) {
-  Type* ty = create<ast::Struct>(Sym("S"), ast::StructMemberList{},
-                                 ast::DecorationList{});
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_TRUE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstStructTest, TypeName) {
   auto name = Sym("my_struct");
   auto* s =

src/ast/u32_test.cc

@@ -34,23 +34,6 @@ namespace {
 
 using AstU32Test = TestHelper;
 
-TEST_F(AstU32Test, Is) {
-  Type* ty = create<U32>();
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_TRUE(ty->Is<U32>());
-  EXPECT_FALSE(ty->Is<Vector>());
-}
-
 TEST_F(AstU32Test, TypeName) {
   auto* u = create<U32>();
   EXPECT_EQ(u->type_name(), "__u32");

src/ast/uint_literal_test.cc

@@ -26,14 +26,6 @@ TEST_F(UintLiteralTest, Value) {
   EXPECT_EQ(u->value(), 47u);
 }
 
-TEST_F(UintLiteralTest, Is) {
-  ast::Literal* l = create<UintLiteral>(42);
-  EXPECT_FALSE(l->Is<BoolLiteral>());
-  EXPECT_FALSE(l->Is<SintLiteral>());
-  EXPECT_FALSE(l->Is<FloatLiteral>());
-  EXPECT_TRUE(l->Is<UintLiteral>());
-}
-
 TEST_F(UintLiteralTest, ToStr) {
   auto* u = create<UintLiteral>(42u);
   EXPECT_EQ(str(u), "42u");

src/ast/vector_test.cc

@@ -40,24 +40,6 @@ TEST_F(AstVectorTest, Creation) {
   EXPECT_EQ(v->size(), 2u);
 }
 
-TEST_F(AstVectorTest, Is) {
-  auto* i32 = create<I32>();
-  Type* ty = create<Vector>(i32, 4);
-  EXPECT_FALSE(ty->Is<AccessControl>());
-  EXPECT_FALSE(ty->Is<Alias>());
-  EXPECT_FALSE(ty->Is<Array>());
-  EXPECT_FALSE(ty->Is<Bool>());
-  EXPECT_FALSE(ty->Is<F32>());
-  EXPECT_FALSE(ty->Is<I32>());
-  EXPECT_FALSE(ty->Is<Matrix>());
-  EXPECT_FALSE(ty->Is<Pointer>());
-  EXPECT_FALSE(ty->Is<Sampler>());
-  EXPECT_FALSE(ty->Is<Struct>());
-  EXPECT_FALSE(ty->Is<Texture>());
-  EXPECT_FALSE(ty->Is<U32>());
-  EXPECT_TRUE(ty->Is<Vector>());
-}
-
 TEST_F(AstVectorTest, TypeName) {
   auto* i32 = create<I32>();
   auto* v = create<Vector>(i32, 3);

src/ast/workgroup_decoration_test.cc

@@ -55,12 +55,6 @@ TEST_F(WorkgroupDecorationTest, Creation_3param) {
   EXPECT_EQ(z, 6u);
 }
 
-TEST_F(WorkgroupDecorationTest, Is) {
-  Decoration* d = create<WorkgroupDecoration>(2, 4, 6);
-  EXPECT_TRUE(d->Is<WorkgroupDecoration>());
-  EXPECT_FALSE(d->Is<StageDecoration>());
-}
-
 TEST_F(WorkgroupDecorationTest, ToStr) {
   auto* d = create<WorkgroupDecoration>(2, 4, 6);
   EXPECT_EQ(str(d), R"(WorkgroupDecoration{2 4 6}