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#include "src/tint/lang/wgsl/ast/discard_statement.h"
#include "src/tint/lang/wgsl/reader/parser/helper_test.h"

namespace tint::wgsl::reader {
namespace {

TEST_F(WGSLParserTest, CompoundStmt) {
    auto p = parser(R"({
  discard;
  return 1 + b / 2;
})");
    auto e = p->expect_compound_statement("");

    EXPECT_EQ(e->source.range.begin.line, 1u);
    EXPECT_EQ(e->source.range.begin.column, 1u);
    EXPECT_EQ(e->source.range.end.line, 4u);
    EXPECT_EQ(e->source.range.end.column, 2u);

    ASSERT_FALSE(p->has_error()) << p->error();
    ASSERT_FALSE(e.errored);
    ASSERT_EQ(e->statements.Length(), 2u);
    EXPECT_TRUE(e->statements[0]->Is<ast::DiscardStatement>());
    EXPECT_TRUE(e->statements[1]->Is<ast::ReturnStatement>());
}

TEST_F(WGSLParserTest, CompoundStmt_Empty) {
    auto p = parser("{}");
    auto e = p->expect_compound_statement("");

    EXPECT_EQ(e->source.range.begin.line, 1u);
    EXPECT_EQ(e->source.range.begin.column, 1u);
    EXPECT_EQ(e->source.range.end.line, 1u);
    EXPECT_EQ(e->source.range.end.column, 3u);

    ASSERT_FALSE(p->has_error()) << p->error();
    ASSERT_FALSE(e.errored);
    EXPECT_EQ(e->statements.Length(), 0u);
}

TEST_F(WGSLParserTest, CompoundStmt_InvalidStmt) {
    auto p = parser("{fn main() {}}");
    auto e = p->expect_compound_statement("");
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    EXPECT_EQ(p->error(), "1:2: expected '}'");
}

TEST_F(WGSLParserTest, CompoundStmt_MissingRightParen) {
    auto p = parser("{return;");
    auto e = p->expect_compound_statement("");
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    EXPECT_EQ(p->error(), "1:9: expected '}'");
}

}  // namespace
}  // namespace tint::wgsl::reader