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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/ast/if_statement.h"
#include "src/ast/discard_statement.h"
#include "src/ast/identifier_expression.h"
#include "src/ast/test_helper.h"
namespace tint {
namespace ast {
namespace {
using IfStatementTest = TestHelper;
TEST_F(IfStatementTest, Creation) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{Source::Location{20, 2}}, cond, body,
ElseStatementList{});
auto src = stmt.source();
EXPECT_EQ(src.range.begin.line, 20u);
EXPECT_EQ(src.range.begin.column, 2u);
}
TEST_F(IfStatementTest, IsIf) {
IfStatement stmt(Source{}, nullptr, create<BlockStatement>(),
ElseStatementList{});
EXPECT_TRUE(stmt.Is<IfStatement>());
}
TEST_F(IfStatementTest, IsValid) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body, ElseStatementList{});
EXPECT_TRUE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_WithElseStatements) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(
Source{}, cond, body,
{
create<ElseStatement>(create<IdentifierExpression>("Ident"),
create<BlockStatement>()),
create<ElseStatement>(create<BlockStatement>()),
});
EXPECT_TRUE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_MissingCondition) {
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, nullptr, body, ElseStatementList{});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_InvalidCondition) {
auto* cond = create<IdentifierExpression>("");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body, ElseStatementList{});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_NullBodyStatement) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
body->append(nullptr);
IfStatement stmt(Source{}, cond, body, ElseStatementList{});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_InvalidBodyStatement) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
body->append(create<IfStatement>(Source{}, nullptr, create<BlockStatement>(),
ast::ElseStatementList{}));
IfStatement stmt(Source{}, cond, body, ElseStatementList{});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_NullElseStatement) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(
Source{}, cond, body,
{
create<ElseStatement>(create<IdentifierExpression>("Ident"),
create<BlockStatement>()),
create<ElseStatement>(create<BlockStatement>()),
nullptr,
});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_InvalidElseStatement) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body,
{
create<ElseStatement>(create<IdentifierExpression>(""),
create<BlockStatement>()),
});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_MultipleElseWiththoutCondition) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body,
{
create<ElseStatement>(create<BlockStatement>()),
create<ElseStatement>(create<BlockStatement>()),
});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, IsValid_ElseNotLast) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(
Source{}, cond, body,
{
create<ElseStatement>(create<BlockStatement>()),
create<ElseStatement>(create<IdentifierExpression>("ident"),
create<BlockStatement>()),
});
EXPECT_FALSE(stmt.IsValid());
}
TEST_F(IfStatementTest, ToStr) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body, ElseStatementList{});
std::ostringstream out;
stmt.to_str(out, 2);
EXPECT_EQ(out.str(), R"( If{
(
Identifier[not set]{cond}
)
{
Discard{}
}
}
)");
}
TEST_F(IfStatementTest, ToStr_WithElseStatements) {
auto* cond = create<IdentifierExpression>("cond");
auto* body = create<BlockStatement>();
body->append(create<DiscardStatement>());
auto* else_if_body = create<BlockStatement>();
else_if_body->append(create<DiscardStatement>());
auto* else_body = create<BlockStatement>();
else_body->append(create<DiscardStatement>());
else_body->append(create<DiscardStatement>());
IfStatement stmt(Source{}, cond, body,
{
create<ElseStatement>(
create<IdentifierExpression>("ident"), else_if_body),
create<ElseStatement>(else_body),
});
std::ostringstream out;
stmt.to_str(out, 2);
EXPECT_EQ(out.str(), R"( If{
(
Identifier[not set]{cond}
)
{
Discard{}
}
}
Else{
(
Identifier[not set]{ident}
)
{
Discard{}
}
}
Else{
{
Discard{}
Discard{}
}
}
)");
}
} // namespace
} // namespace ast
} // namespace tint