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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/gtest/include/gtest/gtest.h"
#include "tools/gn/input_file.h"
#include "tools/gn/parse_tree.h"
#include "tools/gn/scope.h"
#include "tools/gn/test_with_scope.h"
namespace {
bool HasStringValueEqualTo(const Scope* scope,
const char* name,
const char* expected_value) {
const Value* value = scope->GetValue(name);
if (!value)
return false;
if (value->type() != Value::STRING)
return false;
return value->string_value() == expected_value;
}
} // namespace
TEST(Scope, NonRecursiveMergeTo) {
TestWithScope setup;
// Make a pretend parse node with proper tracking that we can blame for the
// given value.
InputFile input_file(SourceFile("//foo"));
Token assignment_token(Location(&input_file, 1, 1), Token::STRING,
"\"hello\"");
LiteralNode assignment;
assignment.set_value(assignment_token);
Value old_value(&assignment, "hello");
setup.scope()->SetValue("v", old_value, &assignment);
// Detect collisions of values' values.
{
Scope new_scope(setup.settings());
Value new_value(&assignment, "goodbye");
new_scope.SetValue("v", new_value, &assignment);
Err err;
EXPECT_FALSE(setup.scope()->NonRecursiveMergeTo(
&new_scope, false, &assignment, "error", &err));
EXPECT_TRUE(err.has_error());
}
// The clobber flag should just overwrite colliding values.
{
Scope new_scope(setup.settings());
Value new_value(&assignment, "goodbye");
new_scope.SetValue("v", new_value, &assignment);
Err err;
EXPECT_TRUE(setup.scope()->NonRecursiveMergeTo(
&new_scope, true, &assignment, "error", &err));
EXPECT_FALSE(err.has_error());
const Value* found_value = new_scope.GetValue("v");
ASSERT_TRUE(found_value);
EXPECT_TRUE(old_value == *found_value);
}
// Don't flag values that technically collide but have the same value.
{
Scope new_scope(setup.settings());
Value new_value(&assignment, "hello");
new_scope.SetValue("v", new_value, &assignment);
Err err;
EXPECT_TRUE(setup.scope()->NonRecursiveMergeTo(
&new_scope, false, &assignment, "error", &err));
EXPECT_FALSE(err.has_error());
}
}
TEST(Scope, MakeClosure) {
// Create 3 nested scopes [const root from setup] <- nested1 <- nested2.
TestWithScope setup;
// Make a pretend parse node with proper tracking that we can blame for the
// given value.
InputFile input_file(SourceFile("//foo"));
Token assignment_token(Location(&input_file, 1, 1), Token::STRING,
"\"hello\"");
LiteralNode assignment;
assignment.set_value(assignment_token);
setup.scope()->SetValue("on_root", Value(&assignment, "on_root"),
&assignment);
// Root scope should be const from the nested caller's perspective.
Scope nested1(static_cast<const Scope*>(setup.scope()));
nested1.SetValue("on_one", Value(&assignment, "on_one"), &assignment);
Scope nested2(&nested1);
nested2.SetValue("on_one", Value(&assignment, "on_two"), &assignment);
nested2.SetValue("on_two", Value(&assignment, "on_two2"), &assignment);
// Making a closure from the root scope.
scoped_ptr<Scope> result = setup.scope()->MakeClosure();
EXPECT_FALSE(result->containing()); // Should have no containing scope.
EXPECT_TRUE(result->GetValue("on_root")); // Value should be copied.
// Making a closure from the second nested scope.
result = nested2.MakeClosure();
EXPECT_EQ(setup.scope(),
result->containing()); // Containing scope should be the root.
EXPECT_TRUE(HasStringValueEqualTo(result.get(), "on_root", "on_root"));
EXPECT_TRUE(HasStringValueEqualTo(result.get(), "on_one", "on_two"));
EXPECT_TRUE(HasStringValueEqualTo(result.get(), "on_two", "on_two2"));
}
TEST(Scope, GetMutableValue) {
TestWithScope setup;
// Make a pretend parse node with proper tracking that we can blame for the
// given value.
InputFile input_file(SourceFile("//foo"));
Token assignment_token(Location(&input_file, 1, 1), Token::STRING,
"\"hello\"");
LiteralNode assignment;
assignment.set_value(assignment_token);
const char kOnConst[] = "on_const";
const char kOnMutable1[] = "on_mutable1";
const char kOnMutable2[] = "on_mutable2";
Value value(&assignment, "hello");
// Create a root scope with one value.
Scope root_scope(setup.settings());
root_scope.SetValue(kOnConst, value, &assignment);
// Create a first nested scope with a different value.
const Scope* const_root_scope = &root_scope;
Scope mutable_scope1(const_root_scope);
mutable_scope1.SetValue(kOnMutable1, value, &assignment);
// Create a second nested scope with a different value.
Scope mutable_scope2(&mutable_scope1);
mutable_scope2.SetValue(kOnMutable2, value, &assignment);
// Check getting root scope values.
EXPECT_TRUE(mutable_scope2.GetValue(kOnConst, true));
EXPECT_FALSE(mutable_scope2.GetMutableValue(kOnConst, true));
// Test reading a value from scope 1.
Value* mutable1_result = mutable_scope2.GetMutableValue(kOnMutable1, false);
ASSERT_TRUE(mutable1_result);
EXPECT_TRUE(*mutable1_result == value);
// Make sure CheckForUnusedVars works on scope1 (we didn't mark the value as
// used in the previous step).
Err err;
EXPECT_FALSE(mutable_scope1.CheckForUnusedVars(&err));
mutable1_result = mutable_scope2.GetMutableValue(kOnMutable1, true);
EXPECT_TRUE(mutable1_result);
err = Err();
EXPECT_TRUE(mutable_scope1.CheckForUnusedVars(&err));
// Test reading a value from scope 2.
Value* mutable2_result = mutable_scope2.GetMutableValue(kOnMutable2, true);
ASSERT_TRUE(mutable2_result);
EXPECT_TRUE(*mutable2_result == value);
}
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