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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-PerkinsandGeoff Romer
4c4c4a4d2c
This adds a RawStringOstream. Versus TestRawOstream, which is
consolidated over to RawStringOstream, it uses a string for storage
instead of a vector, mainly to support move-to-string semantics. Versus
llvm::raw_string_ostream, it owns the string and supports pwrite (which
is needed for driver and its fd_ostream compatibility requirement).
This converts most uses of llvm::raw_string_ostream, leaving behind a
few in InstNamer that explicitly cannot own the string, such as:
```
llvm::raw_string_ostream(name)
<< "_" << tree.tokens().GetColumnNumber(token);
```
I have this as its own library so that it can use CHECK.
Yes this doesn't save much code, but it's code we repeatedly write.
---------
Co-authored-by: Geoff Romer <gromer@google.com>
118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "common/error.h"
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#include <gtest/gtest.h>
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#include "common/error_test_helpers.h"
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#include "common/raw_string_ostream.h"
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namespace Carbon {
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namespace {
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using ::Carbon::Testing::IsError;
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using ::Carbon::Testing::IsSuccess;
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using ::testing::Eq;
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TEST(ErrorTest, Error) {
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Error err("test");
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EXPECT_EQ(err.message(), "test");
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}
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TEST(ErrorTest, ErrorEmptyString) {
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ASSERT_DEATH({ Error err(""); }, "CHECK failure at");
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}
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auto IndirectError() -> Error { return Error("test"); }
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TEST(ErrorTest, IndirectError) { EXPECT_EQ(IndirectError().message(), "test"); }
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TEST(ErrorTest, ErrorOr) {
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ErrorOr<int> err(Error("test"));
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EXPECT_THAT(err, IsError("test"));
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}
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TEST(ErrorTest, ErrorOrValue) { EXPECT_TRUE(ErrorOr<int>(0).ok()); }
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auto IndirectErrorOrTest() -> ErrorOr<int> { return Error("test"); }
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TEST(ErrorTest, IndirectErrorOr) { EXPECT_FALSE(IndirectErrorOrTest().ok()); }
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struct Val {
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int val;
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};
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TEST(ErrorTest, ErrorOrArrowOp) {
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ErrorOr<Val> err({1});
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EXPECT_EQ(err->val, 1);
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}
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auto IndirectErrorOrSuccessTest() -> ErrorOr<Success> { return Success(); }
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TEST(ErrorTest, IndirectErrorOrSuccess) {
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EXPECT_TRUE(IndirectErrorOrSuccessTest().ok());
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}
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TEST(ErrorTest, ReturnIfErrorNoError) {
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auto result = []() -> ErrorOr<Success> {
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CARBON_RETURN_IF_ERROR(ErrorOr<Success>(Success()));
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CARBON_RETURN_IF_ERROR(ErrorOr<Success>(Success()));
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return Success();
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}();
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EXPECT_TRUE(result.ok());
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}
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TEST(ErrorTest, ReturnIfErrorHasError) {
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auto result = []() -> ErrorOr<Success> {
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CARBON_RETURN_IF_ERROR(ErrorOr<Success>(Success()));
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CARBON_RETURN_IF_ERROR(ErrorOr<Success>(Error("error")));
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return Success();
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}();
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EXPECT_THAT(result, IsError("error"));
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}
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TEST(ErrorTest, AssignOrReturnNoError) {
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auto result = []() -> ErrorOr<int> {
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CARBON_ASSIGN_OR_RETURN(int a, ErrorOr<int>(1));
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CARBON_ASSIGN_OR_RETURN(const int b, ErrorOr<int>(2));
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int c = 0;
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CARBON_ASSIGN_OR_RETURN(c, ErrorOr<int>(3));
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return a + b + c;
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}();
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EXPECT_THAT(result, IsSuccess(Eq(6)));
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}
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TEST(ErrorTest, AssignOrReturnHasDirectError) {
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auto result = []() -> ErrorOr<int> {
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CARBON_RETURN_IF_ERROR(ErrorOr<int>(Error("error")));
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return 0;
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}();
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EXPECT_THAT(result, IsError("error"));
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}
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TEST(ErrorTest, AssignOrReturnHasErrorInExpected) {
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auto result = []() -> ErrorOr<int> {
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CARBON_ASSIGN_OR_RETURN(int a, ErrorOr<int>(Error("error")));
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return a;
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}();
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EXPECT_THAT(result, IsError("error"));
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}
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TEST(ErrorTest, ErrorBuilderOperatorImplicitCast) {
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ErrorOr<int> result = ErrorBuilder() << "msg";
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EXPECT_THAT(result, IsError("msg"));
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}
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TEST(ErrorTest, StreamError) {
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Error result = ErrorBuilder("TestFunc") << "msg";
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RawStringOstream result_stream;
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result_stream << result;
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EXPECT_EQ(result_stream.TakeStr(), "TestFunc: msg");
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}
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} // namespace
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} // namespace Carbon
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