src/tint/lang/wgsl/reader/parser/paren_expression_test.cc

// Copyright 2020 The Dawn & Tint Authors
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#include "src/tint/lang/wgsl/reader/parser/helper_test.h"

namespace tint::wgsl::reader {
namespace {

TEST_F(WGSLParserTest, ParenRhsStmt) {
    auto p = parser("(a + b)");
    auto e = p->expect_paren_expression();
    ASSERT_FALSE(p->has_error()) << p->error();
    ASSERT_FALSE(e.errored);
    ASSERT_NE(e.value, nullptr);
    ASSERT_TRUE(e->Is<ast::BinaryExpression>());
}

TEST_F(WGSLParserTest, ParenRhsStmt_MissingLeftParen) {
    auto p = parser("true)");
    auto e = p->expect_paren_expression();
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    ASSERT_EQ(e.value, nullptr);
    EXPECT_EQ(p->error(), "1:1: expected '('");
}

TEST_F(WGSLParserTest, ParenRhsStmt_MissingRightParen) {
    auto p = parser("(true");
    auto e = p->expect_paren_expression();
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    ASSERT_EQ(e.value, nullptr);
    EXPECT_EQ(p->error(), "1:6: expected ')'");
}

TEST_F(WGSLParserTest, ParenRhsStmt_InvalidExpression) {
    auto p = parser("(if (a() {})");
    auto e = p->expect_paren_expression();
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    ASSERT_EQ(e.value, nullptr);
    EXPECT_EQ(p->error(), "1:2: unable to parse expression");
}

TEST_F(WGSLParserTest, ParenRhsStmt_MissingExpression) {
    auto p = parser("()");
    auto e = p->expect_paren_expression();
    ASSERT_TRUE(p->has_error());
    ASSERT_TRUE(e.errored);
    ASSERT_EQ(e.value, nullptr);
    EXPECT_EQ(p->error(), "1:2: unable to parse expression");
}

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