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// Copyright 2022 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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#include <utility>
#include "gtest/gtest-spi.h"
#include "src/tint/lang/wgsl/ast/transform/get_insertion_point.h"
#include "src/tint/lang/wgsl/ast/transform/helper_test.h"
#include "src/tint/lang/wgsl/program/clone_context.h"
#include "src/tint/lang/wgsl/program/program_builder.h"
#include "src/tint/lang/wgsl/resolver/resolve.h"
#include "src/tint/utils/ice/ice.h"
using namespace tint::core::number_suffixes; // NOLINT
namespace tint::ast::transform {
namespace {
using GetInsertionPointTest = ::testing::Test;
TEST_F(GetInsertionPointTest, Block) {
// fn f() {
// var a = 1i;
// }
ProgramBuilder b;
auto* expr = b.Expr(1_i);
auto* var = b.Decl(b.Var("a", expr));
auto* block = b.Block(var);
b.Func("f", tint::Empty, b.ty.void_(), Vector{block});
Program original(resolver::Resolve(b));
ProgramBuilder cloned_b;
program::CloneContext ctx(&cloned_b, &original);
// Can insert in block containing the variable, above or below the input statement.
auto ip = utils::GetInsertionPoint(ctx, var);
ASSERT_EQ(ip.first->Declaration(), block);
ASSERT_EQ(ip.second, var);
}
TEST_F(GetInsertionPointTest, ForLoopInit) {
// fn f() {
// for(var a = 1i; true; ) {
// }
// }
ProgramBuilder b;
auto* expr = b.Expr(1_i);
auto* var = b.Decl(b.Var("a", expr));
auto* fl = b.For(var, b.Expr(true), nullptr, b.Block());
auto* func_block = b.Block(fl);
b.Func("f", tint::Empty, b.ty.void_(), Vector{func_block});
Program original(resolver::Resolve(b));
ProgramBuilder cloned_b;
program::CloneContext ctx(&cloned_b, &original);
// Can insert in block containing for-loop above the for-loop itself.
auto ip = utils::GetInsertionPoint(ctx, var);
ASSERT_EQ(ip.first->Declaration(), func_block);
ASSERT_EQ(ip.second, fl);
}
TEST_F(GetInsertionPointTest, ForLoopCont_Invalid) {
// fn f() {
// for(; true; var a = 1i) {
// }
// }
ProgramBuilder b;
auto* expr = b.Expr(1_i);
auto* var = b.Decl(b.Var("a", expr));
auto* s = b.For({}, b.Expr(true), var, b.Block());
b.Func("f", tint::Empty, b.ty.void_(), Vector{s});
Program original(resolver::Resolve(b));
ProgramBuilder cloned_b;
program::CloneContext ctx(&cloned_b, &original);
// Can't insert before/after for loop continue statement (would ned to be converted to loop).
auto ip = utils::GetInsertionPoint(ctx, var);
ASSERT_EQ(ip.first, nullptr);
ASSERT_EQ(ip.second, nullptr);
}
} // namespace
} // namespace tint::ast::transform