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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/test_with_scope.h"
TEST(FunctionForeach, CollisionOnLoopVar) {
TestWithScope setup;
TestParseInput input(
"a = 5\n"
"i = 6\n"
"foreach(i, [1, 2, 3]) {\n" // Use same loop var name previously defined.
" print(\"$a $i\")\n"
" a = a + 1\n" // Test for side effects inside loop.
"}\n"
"print(\"$a $i\")"); // Make sure that i goes back to original value.
ASSERT_FALSE(input.has_error());
Err err;
input.parsed()->Execute(setup.scope(), &err);
ASSERT_FALSE(err.has_error()) << err.message();
EXPECT_EQ("5 1\n6 2\n7 3\n8 6\n", setup.print_output());
}
TEST(FunctionForeach, UniqueLoopVar) {
TestWithScope setup;
TestParseInput input_good(
"foreach(i, [1, 2, 3]) {\n"
" print(i)\n"
"}\n");
ASSERT_FALSE(input_good.has_error());
Err err;
input_good.parsed()->Execute(setup.scope(), &err);
ASSERT_FALSE(err.has_error()) << err.message();
EXPECT_EQ("1\n2\n3\n", setup.print_output());
setup.print_output().clear();
// Same thing but try to use the loop var after loop is done. It should be
// undefined and throw an error.
TestParseInput input_bad(
"foreach(i, [1, 2, 3]) {\n"
" print(i)\n"
"}\n"
"print(i)");
ASSERT_FALSE(input_bad.has_error()); // Should parse OK.
input_bad.parsed()->Execute(setup.scope(), &err);
ASSERT_TRUE(err.has_error()); // Shouldn't actually run.
}
// Checks that the identifier used as the list is marked as "used".
TEST(FunctionForeach, MarksIdentAsUsed) {
TestWithScope setup;
TestParseInput input_good(
"a = [1, 2]\n"
"foreach(i, a) {\n"
" print(i)\n"
"}\n");
ASSERT_FALSE(input_good.has_error());
Err err;
input_good.parsed()->Execute(setup.scope(), &err);
ASSERT_FALSE(err.has_error()) << err.message();
EXPECT_EQ("1\n2\n", setup.print_output());
setup.print_output().clear();
// Check for unused vars.
EXPECT_TRUE(setup.scope()->CheckForUnusedVars(&err));
EXPECT_FALSE(err.has_error());
}
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