src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator_test.cc - tint - Git at Google

 // Copyright 2021 The Dawn & Tint Authors
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 // 1. Redistributions of source code must retain the above copyright notice, this
 //    list of conditions and the following disclaimer.
 //
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 //    this list of conditions and the following disclaimer in the documentation
 //    and/or other materials provided with the distribution.
 //
 // 3. Neither the name of the copyright holder nor the names of its
 //    contributors may be used to endorse or promote products derived from
 //    this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include <string>

 #include "gtest/gtest.h"

 #include "src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator.h"
 #include "src/tint/fuzzers/tint_ast_fuzzer/mutator.h"
 #include "src/tint/fuzzers/tint_ast_fuzzer/node_id_map.h"
 #include "src/tint/fuzzers/tint_ast_fuzzer/probability_context.h"
 #include "src/tint/lang/wgsl/ast/call_statement.h"
 #include "src/tint/lang/wgsl/program/program_builder.h"
 #include "src/tint/lang/wgsl/reader/reader.h"
 #include "src/tint/lang/wgsl/writer/writer.h"

 namespace tint::fuzzers::ast_fuzzer {
 namespace {

 TEST(ChangeUnaryOperatorTest, Operator_Not_Applicable) {
     std::string content = R"(
     fn main() {
       let a : f32 = 1.1;
       let b = vec2<i32>(1, -1);
       let c : u32 = 0u;
       let d : vec3<bool> = vec3<bool> (false, false, true);

       var neg_a = -a;
       var not_b = ~b;
       var not_c = ~c;
       var neg_d = !d;
     }
   )";
     Source::File file("test.wgsl", content);
     auto program = wgsl::reader::Parse(&file);
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     NodeIdMap node_id_map(program);

     const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

     // Get variable from statements.
     const auto* neg_a_var = main_fn_statements[4]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(neg_a_var, nullptr);

     const auto* not_b_var = main_fn_statements[5]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(not_b_var, nullptr);

     const auto* not_c_var = main_fn_statements[6]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(not_c_var, nullptr);

     const auto* neg_d_var = main_fn_statements[7]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(neg_d_var, nullptr);

     // Get the expression from variable declaration.
     const auto* neg_a_expr = neg_a_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(neg_a_expr, nullptr);

     const auto* not_b_expr = not_b_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(not_b_expr, nullptr);

     const auto* not_c_expr = not_c_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(not_c_expr, nullptr);

     const auto* neg_d_expr = neg_d_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(neg_d_expr, nullptr);

     // The following mutations are not applicable.
     auto neg_a_id = node_id_map.GetId(neg_a_expr);
     // Only negation is allowed for float type. Cannot change
     // the operator of float types to any other.
     ASSERT_FALSE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kNot),
                                     node_id_map, program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kNegation),
                                     node_id_map, program, &node_id_map, nullptr));

     auto not_b_id = node_id_map.GetId(not_b_expr);
     // Only complement and negation is allowed for signed integer type.
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(not_b_id, core::UnaryOp::kNot),
                                     node_id_map, program, &node_id_map, nullptr));
     // Cannot change to the same unary operator.
     ASSERT_FALSE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(not_b_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));

     auto not_c_id = node_id_map.GetId(not_c_expr);
     // Only complement is allowed for unsigned integer.Cannot change
     //  // the operator of float types to any other.
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kNot),
                                     node_id_map, program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kNegation),
                                     node_id_map, program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));

     auto neg_d_id = node_id_map.GetId(neg_d_expr);
     // Only logical negation (not) is allowed for bool type.  Cannot change
     // the operator of float types to any other.
     ASSERT_FALSE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kNegation),
                                     node_id_map, program, &node_id_map, nullptr));
     ASSERT_FALSE(MaybeApplyMutation(program,
                                     MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kNot),
                                     node_id_map, program, &node_id_map, nullptr));
 }

 TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable1) {
     std::string content = R"(
     fn main() {
       let a : i32 = 5;
       let comp_a = ~a;
     }
   )";
     Source::File file("test.wgsl", content);
     auto program = wgsl::reader::Parse(&file);
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     NodeIdMap node_id_map(program);

     const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

     // Get variable from statements.
     const auto* comp_a_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(comp_a_var, nullptr);

     // Get the expression from variable declaration.
     const auto* comp_a_expr = comp_a_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(comp_a_expr, nullptr);

     // Assert mutation to be applicable and apply mutation.
     auto comp_a_id = node_id_map.GetId(comp_a_expr);
     ASSERT_TRUE(MaybeApplyMutation(program,
                                    MutationChangeUnaryOperator(comp_a_id, core::UnaryOp::kNegation),
                                    node_id_map, program, &node_id_map, nullptr));
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     wgsl::writer::Options options;
     auto result = wgsl::writer::Generate(program, options);
     ASSERT_TRUE(result) << result.Failure();

     std::string expected_shader = R"(fn main() {
   let a : i32 = 5;
   let comp_a = -(a);
 }
 )";
     ASSERT_EQ(expected_shader, result->wgsl);
 }

 TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable2) {
     std::string content = R"(
     fn main() {
       let b : vec3<i32> = vec3<i32>(1, 3, -1);
       var comp_b : vec3<i32> = ~b;
     })";
     Source::File file("test.wgsl", content);
     auto program = wgsl::reader::Parse(&file);
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     NodeIdMap node_id_map(program);

     const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

     // Get variable from statements.
     const auto* comp_b_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(comp_b_var, nullptr);

     // Get the expression from variable declaration.
     const auto* comp_b_expr = comp_b_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(comp_b_expr, nullptr);

     // Assert mutation to be applicable and apply mutation.
     auto comp_b_id = node_id_map.GetId(comp_b_expr);
     ASSERT_TRUE(MaybeApplyMutation(program,
                                    MutationChangeUnaryOperator(comp_b_id, core::UnaryOp::kNegation),
                                    node_id_map, program, &node_id_map, nullptr));
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     wgsl::writer::Options options;
     auto result = wgsl::writer::Generate(program, options);
     ASSERT_TRUE(result) << result.Failure();

     std::string expected_shader = R"(fn main() {
   let b : vec3<i32> = vec3<i32>(1, 3, -(1));
   var comp_b : vec3<i32> = -(b);
 }
 )";
     ASSERT_EQ(expected_shader, result->wgsl);
 }

 TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable3) {
     std::string content = R"(
     fn main() {
       var a = -5;

       var neg_a = -(a);
     }
   )";
     Source::File file("test.wgsl", content);
     auto program = wgsl::reader::Parse(&file);
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     NodeIdMap node_id_map(program);

     const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

     // Get variable from statements.
     const auto* neg_a_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(neg_a_var, nullptr);

     // Get the expression from variable declaration.
     const auto* neg_a_expr = neg_a_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(neg_a_expr, nullptr);

     // Assert mutation to be applicable and apply mutation.
     auto neg_a_id = node_id_map.GetId(neg_a_expr);
     ASSERT_TRUE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     wgsl::writer::Options options;
     auto result = wgsl::writer::Generate(program, options);
     ASSERT_TRUE(result) << result.Failure();

     std::string expected_shader = R"(fn main() {
   var a = -(5);
   var neg_a = ~(a);
 }
 )";
     ASSERT_EQ(expected_shader, result->wgsl);
 }

 TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable4) {
     std::string content = R"(
     fn main() {
       var b : vec3<i32> = vec3<i32>(1, 3, -1);
       let neg_b : vec3<i32> = -b;
     }
   )";
     Source::File file("test.wgsl", content);
     auto program = wgsl::reader::Parse(&file);
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     NodeIdMap node_id_map(program);

     const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

     // Get variable from statements.
     const auto* neg_b_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
     ASSERT_NE(neg_b_var, nullptr);

     // Get the expression from variable declaration.
     const auto* neg_b_expr = neg_b_var->initializer->As<ast::UnaryOpExpression>();
     ASSERT_NE(neg_b_expr, nullptr);

     // Assert mutation to be applicable and apply mutation.
     auto neg_b_id = node_id_map.GetId(neg_b_expr);
     ASSERT_TRUE(MaybeApplyMutation(
         program, MutationChangeUnaryOperator(neg_b_id, core::UnaryOp::kComplement), node_id_map,
         program, &node_id_map, nullptr));
     ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

     wgsl::writer::Options options;
     auto result = wgsl::writer::Generate(program, options);
     ASSERT_TRUE(result) << result.Failure();

     std::string expected_shader = R"(fn main() {
   var b : vec3<i32> = vec3<i32>(1, 3, -(1));
   let neg_b : vec3<i32> = ~(b);
 }
 )";
     ASSERT_EQ(expected_shader, result->wgsl);
 }

 }  // namespace
 }  // namespace tint::fuzzers::ast_fuzzer
	// Copyright 2021 The Dawn & Tint Authors
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// 1. Redistributions of source code must retain the above copyright notice, this
	// list of conditions and the following disclaimer.
	//
	// 2. Redistributions in binary form must reproduce the above copyright notice,
	// this list of conditions and the following disclaimer in the documentation
	// and/or other materials provided with the distribution.
	//
	// 3. Neither the name of the copyright holder nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include <string>

	#include "gtest/gtest.h"

	#include "src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator.h"
	#include "src/tint/fuzzers/tint_ast_fuzzer/mutator.h"
	#include "src/tint/fuzzers/tint_ast_fuzzer/node_id_map.h"
	#include "src/tint/fuzzers/tint_ast_fuzzer/probability_context.h"
	#include "src/tint/lang/wgsl/ast/call_statement.h"
	#include "src/tint/lang/wgsl/program/program_builder.h"
	#include "src/tint/lang/wgsl/reader/reader.h"
	#include "src/tint/lang/wgsl/writer/writer.h"

	namespace tint::fuzzers::ast_fuzzer {
	namespace {

	TEST(ChangeUnaryOperatorTest, Operator_Not_Applicable) {
	std::string content = R"(
	fn main() {
	let a : f32 = 1.1;
	let b = vec2<i32>(1, -1);
	let c : u32 = 0u;
	let d : vec3<bool> = vec3<bool> (false, false, true);

	var neg_a = -a;
	var not_b = ~b;
	var not_c = ~c;
	var neg_d = !d;
	}
	)";
	Source::File file("test.wgsl", content);
	auto program = wgsl::reader::Parse(&file);
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	NodeIdMap node_id_map(program);

	const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

	// Get variable from statements.
	const auto* neg_a_var = main_fn_statements[4]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(neg_a_var, nullptr);

	const auto* not_b_var = main_fn_statements[5]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(not_b_var, nullptr);

	const auto* not_c_var = main_fn_statements[6]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(not_c_var, nullptr);

	const auto* neg_d_var = main_fn_statements[7]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(neg_d_var, nullptr);

	// Get the expression from variable declaration.
	const auto* neg_a_expr = neg_a_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(neg_a_expr, nullptr);

	const auto* not_b_expr = not_b_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(not_b_expr, nullptr);

	const auto* not_c_expr = not_c_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(not_c_expr, nullptr);

	const auto* neg_d_expr = neg_d_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(neg_d_expr, nullptr);

	// The following mutations are not applicable.
	auto neg_a_id = node_id_map.GetId(neg_a_expr);
	// Only negation is allowed for float type. Cannot change
	// the operator of float types to any other.
	ASSERT_FALSE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kNot),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kNegation),
	node_id_map, program, &node_id_map, nullptr));

	auto not_b_id = node_id_map.GetId(not_b_expr);
	// Only complement and negation is allowed for signed integer type.
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(not_b_id, core::UnaryOp::kNot),
	node_id_map, program, &node_id_map, nullptr));
	// Cannot change to the same unary operator.
	ASSERT_FALSE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(not_b_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));

	auto not_c_id = node_id_map.GetId(not_c_expr);
	// Only complement is allowed for unsigned integer.Cannot change
	// // the operator of float types to any other.
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kNot),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kNegation),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(not_c_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));

	auto neg_d_id = node_id_map.GetId(neg_d_expr);
	// Only logical negation (not) is allowed for bool type. Cannot change
	// the operator of float types to any other.
	ASSERT_FALSE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kNegation),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_FALSE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(neg_d_id, core::UnaryOp::kNot),
	node_id_map, program, &node_id_map, nullptr));
	}

	TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable1) {
	std::string content = R"(
	fn main() {
	let a : i32 = 5;
	let comp_a = ~a;
	}
	)";
	Source::File file("test.wgsl", content);
	auto program = wgsl::reader::Parse(&file);
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	NodeIdMap node_id_map(program);

	const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

	// Get variable from statements.
	const auto* comp_a_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(comp_a_var, nullptr);

	// Get the expression from variable declaration.
	const auto* comp_a_expr = comp_a_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(comp_a_expr, nullptr);

	// Assert mutation to be applicable and apply mutation.
	auto comp_a_id = node_id_map.GetId(comp_a_expr);
	ASSERT_TRUE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(comp_a_id, core::UnaryOp::kNegation),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	wgsl::writer::Options options;
	auto result = wgsl::writer::Generate(program, options);
	ASSERT_TRUE(result) << result.Failure();

	std::string expected_shader = R"(fn main() {
	let a : i32 = 5;
	let comp_a = -(a);
	}
	)";
	ASSERT_EQ(expected_shader, result->wgsl);
	}

	TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable2) {
	std::string content = R"(
	fn main() {
	let b : vec3<i32> = vec3<i32>(1, 3, -1);
	var comp_b : vec3<i32> = ~b;
	})";
	Source::File file("test.wgsl", content);
	auto program = wgsl::reader::Parse(&file);
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	NodeIdMap node_id_map(program);

	const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

	// Get variable from statements.
	const auto* comp_b_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(comp_b_var, nullptr);

	// Get the expression from variable declaration.
	const auto* comp_b_expr = comp_b_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(comp_b_expr, nullptr);

	// Assert mutation to be applicable and apply mutation.
	auto comp_b_id = node_id_map.GetId(comp_b_expr);
	ASSERT_TRUE(MaybeApplyMutation(program,
	MutationChangeUnaryOperator(comp_b_id, core::UnaryOp::kNegation),
	node_id_map, program, &node_id_map, nullptr));
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	wgsl::writer::Options options;
	auto result = wgsl::writer::Generate(program, options);
	ASSERT_TRUE(result) << result.Failure();

	std::string expected_shader = R"(fn main() {
	let b : vec3<i32> = vec3<i32>(1, 3, -(1));
	var comp_b : vec3<i32> = -(b);
	}
	)";
	ASSERT_EQ(expected_shader, result->wgsl);
	}

	TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable3) {
	std::string content = R"(
	fn main() {
	var a = -5;

	var neg_a = -(a);
	}
	)";
	Source::File file("test.wgsl", content);
	auto program = wgsl::reader::Parse(&file);
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	NodeIdMap node_id_map(program);

	const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

	// Get variable from statements.
	const auto* neg_a_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(neg_a_var, nullptr);

	// Get the expression from variable declaration.
	const auto* neg_a_expr = neg_a_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(neg_a_expr, nullptr);

	// Assert mutation to be applicable and apply mutation.
	auto neg_a_id = node_id_map.GetId(neg_a_expr);
	ASSERT_TRUE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(neg_a_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	wgsl::writer::Options options;
	auto result = wgsl::writer::Generate(program, options);
	ASSERT_TRUE(result) << result.Failure();

	std::string expected_shader = R"(fn main() {
	var a = -(5);
	var neg_a = ~(a);
	}
	)";
	ASSERT_EQ(expected_shader, result->wgsl);
	}

	TEST(ChangeUnaryOperatorTest, Signed_Integer_Types_Applicable4) {
	std::string content = R"(
	fn main() {
	var b : vec3<i32> = vec3<i32>(1, 3, -1);
	let neg_b : vec3<i32> = -b;
	}
	)";
	Source::File file("test.wgsl", content);
	auto program = wgsl::reader::Parse(&file);
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	NodeIdMap node_id_map(program);

	const auto& main_fn_statements = program.AST().Functions()[0]->body->statements;

	// Get variable from statements.
	const auto* neg_b_var = main_fn_statements[1]->As<ast::VariableDeclStatement>()->variable;
	ASSERT_NE(neg_b_var, nullptr);

	// Get the expression from variable declaration.
	const auto* neg_b_expr = neg_b_var->initializer->As<ast::UnaryOpExpression>();
	ASSERT_NE(neg_b_expr, nullptr);

	// Assert mutation to be applicable and apply mutation.
	auto neg_b_id = node_id_map.GetId(neg_b_expr);
	ASSERT_TRUE(MaybeApplyMutation(
	program, MutationChangeUnaryOperator(neg_b_id, core::UnaryOp::kComplement), node_id_map,
	program, &node_id_map, nullptr));
	ASSERT_TRUE(program.IsValid()) << program.Diagnostics();

	wgsl::writer::Options options;
	auto result = wgsl::writer::Generate(program, options);
	ASSERT_TRUE(result) << result.Failure();

	std::string expected_shader = R"(fn main() {
	var b : vec3<i32> = vec3<i32>(1, 3, -(1));
	let neg_b : vec3<i32> = ~(b);
	}
	)";
	ASSERT_EQ(expected_shader, result->wgsl);
	}

	} // namespace
	} // namespace tint::fuzzers::ast_fuzzer