src/tint/lang/wgsl/reader/parser/switch_body_test.cc - dawn - Git at Google

 // Copyright 2020 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 "src/tint/lang/wgsl/reader/parser/helper_test.h"

 namespace tint::wgsl::reader {
 namespace {

 TEST_F(WGSLParserTest, SwitchBody_Case) {
     auto p = parser("case 1 { a = 4; }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());

     auto* stmt = e->As<ast::CaseStatement>();
     ASSERT_EQ(stmt->selectors.Length(), 1u);

     auto* sel = stmt->selectors[0];
     EXPECT_FALSE(sel->IsDefault());
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());

     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     EXPECT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
     ASSERT_EQ(e->body->statements.Length(), 1u);
     EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_Expression) {
     auto p = parser("case 1 + 2 { a = 4; }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());

     auto* stmt = e->As<ast::CaseStatement>();
     ASSERT_EQ(stmt->selectors.Length(), 1u);

     auto* sel = stmt->selectors[0];
     EXPECT_FALSE(sel->IsDefault());

     ASSERT_TRUE(sel->expr->Is<ast::BinaryExpression>());
     auto* expr = sel->expr->As<ast::BinaryExpression>();

     EXPECT_EQ(core::BinaryOp::kAdd, expr->op);
     auto* v = expr->lhs->As<ast::IntLiteralExpression>();
     ASSERT_NE(nullptr, v);
     EXPECT_EQ(v->value, 1u);

     v = expr->rhs->As<ast::IntLiteralExpression>();
     ASSERT_NE(nullptr, v);
     EXPECT_EQ(v->value, 2u);

     ASSERT_EQ(e->body->statements.Length(), 1u);
     EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_WithColon) {
     auto p = parser("case 1: { a = 4; }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());

     auto* stmt = e->As<ast::CaseStatement>();
     ASSERT_EQ(stmt->selectors.Length(), 1u);
     auto* sel = stmt->selectors[0];
     EXPECT_FALSE(sel->IsDefault());

     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();

     EXPECT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
     ASSERT_EQ(e->body->statements.Length(), 1u);
     EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_TrailingComma) {
     auto p = parser("case 1, 2, { }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());

     auto* stmt = e->As<ast::CaseStatement>();
     ASSERT_EQ(stmt->selectors.Length(), 2u);
     auto* sel = stmt->selectors[0];

     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     EXPECT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

     sel = stmt->selectors[1];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     expr = sel->expr->As<ast::IntLiteralExpression>();
     EXPECT_EQ(expr->value, 2);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_TrailingComma_WithColon) {
     auto p = parser("case 1, 2,: { }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());

     auto* stmt = e->As<ast::CaseStatement>();
     ASSERT_EQ(stmt->selectors.Length(), 2u);
     auto* sel = stmt->selectors[0];

     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     EXPECT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

     sel = stmt->selectors[1];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     expr = sel->expr->As<ast::IntLiteralExpression>();
     EXPECT_EQ(expr->value, 2);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_Invalid) {
     auto p = parser("case if: { a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:6: expected case selector expression or `default`");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MissingConstLiteral) {
     auto p = parser("case: { a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:5: expected case selector expression or `default`");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketLeft) {
     auto p = parser("case 1 a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:8: expected '{' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketLeft_WithColon) {
     auto p = parser("case 1: a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:9: expected '{' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketRight) {
     auto p = parser("case 1: { a = 4; ");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:18: expected '}' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_InvalidCaseBody) {
     auto p = parser("case 1: { fn main() {} }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:11: expected '}' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors) {
     auto p = parser("case 1, 2 { }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());
     ASSERT_EQ(e->body->statements.Length(), 0u);
     ASSERT_EQ(e->selectors.Length(), 2u);

     auto* sel = e->selectors[0];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

     sel = e->selectors[1];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 2);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors_with_default) {
     auto p = parser("case 1, default, 2 { }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_TRUE(e->ContainsDefault());
     ASSERT_EQ(e->body->statements.Length(), 0u);
     ASSERT_EQ(e->selectors.Length(), 3u);

     auto* sel = e->selectors[0];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

     EXPECT_TRUE(e->selectors[1]->IsDefault());

     sel = e->selectors[2];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 2);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors_WithColon) {
     auto p = parser("case 1, 2: { }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_FALSE(e->ContainsDefault());
     ASSERT_EQ(e->body->statements.Length(), 0u);
     ASSERT_EQ(e->selectors.Length(), 2u);

     auto* sel = e->selectors[0];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     auto* expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 1);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

     sel = e->selectors[1];
     ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
     expr = sel->expr->As<ast::IntLiteralExpression>();
     ASSERT_EQ(expr->value, 2);
     EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectorsMissingComma) {
     auto p = parser("case 1 2: { }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:8: expected '{' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectorsStartsWithComma) {
     auto p = parser("case , 1, 2: { }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:6: expected case selector expression or `default`");
 }

 TEST_F(WGSLParserTest, SwitchBody_Default) {
     auto p = parser("default { a = 4; }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_TRUE(e->ContainsDefault());
     ASSERT_EQ(e->body->statements.Length(), 1u);
     EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, SwitchBody_Default_WithColon) {
     auto p = parser("default: { a = 4; }");
     auto e = p->switch_body();
     EXPECT_FALSE(p->has_error()) << p->error();
     EXPECT_TRUE(e.matched);
     EXPECT_FALSE(e.errored);
     ASSERT_NE(e.value, nullptr);
     ASSERT_TRUE(e->Is<ast::CaseStatement>());
     EXPECT_TRUE(e->ContainsDefault());
     ASSERT_EQ(e->body->statements.Length(), 1u);
     EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
 }

 TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketLeft) {
     auto p = parser("default a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:9: expected '{' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketLeft_WithColon) {
     auto p = parser("default: a = 4; }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:10: expected '{' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketRight) {
     auto p = parser("default: { a = 4; ");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:19: expected '}' for case statement");
 }

 TEST_F(WGSLParserTest, SwitchBody_Default_InvalidCaseBody) {
     auto p = parser("default: { fn main() {} }");
     auto e = p->switch_body();
     EXPECT_TRUE(p->has_error());
     EXPECT_TRUE(e.errored);
     EXPECT_FALSE(e.matched);
     EXPECT_EQ(e.value, nullptr);
     EXPECT_EQ(p->error(), "1:12: expected '}' for case statement");
 }

 }  // namespace
 }  // namespace tint::wgsl::reader
	// Copyright 2020 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 "src/tint/lang/wgsl/reader/parser/helper_test.h"

	namespace tint::wgsl::reader {
	namespace {

	TEST_F(WGSLParserTest, SwitchBody_Case) {
	auto p = parser("case 1 { a = 4; }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());

	auto* stmt = e->As<ast::CaseStatement>();
	ASSERT_EQ(stmt->selectors.Length(), 1u);

	auto* sel = stmt->selectors[0];
	EXPECT_FALSE(sel->IsDefault());
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());

	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	EXPECT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	ASSERT_EQ(e->body->statements.Length(), 1u);
	EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_Expression) {
	auto p = parser("case 1 + 2 { a = 4; }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());

	auto* stmt = e->As<ast::CaseStatement>();
	ASSERT_EQ(stmt->selectors.Length(), 1u);

	auto* sel = stmt->selectors[0];
	EXPECT_FALSE(sel->IsDefault());

	ASSERT_TRUE(sel->expr->Is<ast::BinaryExpression>());
	auto* expr = sel->expr->As<ast::BinaryExpression>();

	EXPECT_EQ(core::BinaryOp::kAdd, expr->op);
	auto* v = expr->lhs->As<ast::IntLiteralExpression>();
	ASSERT_NE(nullptr, v);
	EXPECT_EQ(v->value, 1u);

	v = expr->rhs->As<ast::IntLiteralExpression>();
	ASSERT_NE(nullptr, v);
	EXPECT_EQ(v->value, 2u);

	ASSERT_EQ(e->body->statements.Length(), 1u);
	EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_WithColon) {
	auto p = parser("case 1: { a = 4; }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());

	auto* stmt = e->As<ast::CaseStatement>();
	ASSERT_EQ(stmt->selectors.Length(), 1u);
	auto* sel = stmt->selectors[0];
	EXPECT_FALSE(sel->IsDefault());

	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();

	EXPECT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	ASSERT_EQ(e->body->statements.Length(), 1u);
	EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_TrailingComma) {
	auto p = parser("case 1, 2, { }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());

	auto* stmt = e->As<ast::CaseStatement>();
	ASSERT_EQ(stmt->selectors.Length(), 2u);
	auto* sel = stmt->selectors[0];

	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	EXPECT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

	sel = stmt->selectors[1];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	expr = sel->expr->As<ast::IntLiteralExpression>();
	EXPECT_EQ(expr->value, 2);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_TrailingComma_WithColon) {
	auto p = parser("case 1, 2,: { }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());

	auto* stmt = e->As<ast::CaseStatement>();
	ASSERT_EQ(stmt->selectors.Length(), 2u);
	auto* sel = stmt->selectors[0];

	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	EXPECT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

	sel = stmt->selectors[1];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	expr = sel->expr->As<ast::IntLiteralExpression>();
	EXPECT_EQ(expr->value, 2);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_Invalid) {
	auto p = parser("case if: { a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:6: expected case selector expression or `default`");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MissingConstLiteral) {
	auto p = parser("case: { a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:5: expected case selector expression or `default`");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketLeft) {
	auto p = parser("case 1 a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:8: expected '{' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketLeft_WithColon) {
	auto p = parser("case 1: a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:9: expected '{' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MissingBracketRight) {
	auto p = parser("case 1: { a = 4; ");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:18: expected '}' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_InvalidCaseBody) {
	auto p = parser("case 1: { fn main() {} }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:11: expected '}' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors) {
	auto p = parser("case 1, 2 { }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());
	ASSERT_EQ(e->body->statements.Length(), 0u);
	ASSERT_EQ(e->selectors.Length(), 2u);

	auto* sel = e->selectors[0];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

	sel = e->selectors[1];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 2);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors_with_default) {
	auto p = parser("case 1, default, 2 { }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_TRUE(e->ContainsDefault());
	ASSERT_EQ(e->body->statements.Length(), 0u);
	ASSERT_EQ(e->selectors.Length(), 3u);

	auto* sel = e->selectors[0];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

	EXPECT_TRUE(e->selectors[1]->IsDefault());

	sel = e->selectors[2];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 2);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectors_WithColon) {
	auto p = parser("case 1, 2: { }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_FALSE(e->ContainsDefault());
	ASSERT_EQ(e->body->statements.Length(), 0u);
	ASSERT_EQ(e->selectors.Length(), 2u);

	auto* sel = e->selectors[0];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	auto* expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 1);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);

	sel = e->selectors[1];
	ASSERT_TRUE(sel->expr->Is<ast::IntLiteralExpression>());
	expr = sel->expr->As<ast::IntLiteralExpression>();
	ASSERT_EQ(expr->value, 2);
	EXPECT_EQ(expr->suffix, ast::IntLiteralExpression::Suffix::kNone);
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectorsMissingComma) {
	auto p = parser("case 1 2: { }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:8: expected '{' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Case_MultipleSelectorsStartsWithComma) {
	auto p = parser("case , 1, 2: { }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:6: expected case selector expression or `default`");
	}

	TEST_F(WGSLParserTest, SwitchBody_Default) {
	auto p = parser("default { a = 4; }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_TRUE(e->ContainsDefault());
	ASSERT_EQ(e->body->statements.Length(), 1u);
	EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, SwitchBody_Default_WithColon) {
	auto p = parser("default: { a = 4; }");
	auto e = p->switch_body();
	EXPECT_FALSE(p->has_error()) << p->error();
	EXPECT_TRUE(e.matched);
	EXPECT_FALSE(e.errored);
	ASSERT_NE(e.value, nullptr);
	ASSERT_TRUE(e->Is<ast::CaseStatement>());
	EXPECT_TRUE(e->ContainsDefault());
	ASSERT_EQ(e->body->statements.Length(), 1u);
	EXPECT_TRUE(e->body->statements[0]->Is<ast::AssignmentStatement>());
	}

	TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketLeft) {
	auto p = parser("default a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:9: expected '{' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketLeft_WithColon) {
	auto p = parser("default: a = 4; }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:10: expected '{' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Default_MissingBracketRight) {
	auto p = parser("default: { a = 4; ");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:19: expected '}' for case statement");
	}

	TEST_F(WGSLParserTest, SwitchBody_Default_InvalidCaseBody) {
	auto p = parser("default: { fn main() {} }");
	auto e = p->switch_body();
	EXPECT_TRUE(p->has_error());
	EXPECT_TRUE(e.errored);
	EXPECT_FALSE(e.matched);
	EXPECT_EQ(e.value, nullptr);
	EXPECT_EQ(p->error(), "1:12: expected '}' for case statement");
	}

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