1//===- llvm/unittest/Support/raw_fd_stream_test.cpp - raw_fd_stream tests -===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "llvm/ADT/SmallString.h"
10#include "llvm/Config/llvm-config.h"
11#include "llvm/Support/Casting.h"
12#include "llvm/Support/FileSystem.h"
13#include "llvm/Support/FileUtilities.h"
14#include "llvm/Support/raw_ostream.h"
15#include "gtest/gtest.h"
16
17using namespace llvm;
18
19namespace {
20
21TEST(raw_fd_streamTest, ReadAfterWrite) {
22 SmallString<64> Path;
23 int FD;
24 ASSERT_FALSE(sys::fs::createTemporaryFile("foo", "bar", FD, Path));
25 FileRemover Cleanup(Path);
26 std::error_code EC;
27 raw_fd_stream OS(Path, EC);
28 EXPECT_TRUE(!EC);
29
30 char Bytes[8];
31
32 OS.write(Ptr: "01234567", Size: 8);
33
34 OS.seek(off: 3);
35 EXPECT_EQ(OS.read(Bytes, 2), 2);
36 EXPECT_EQ(Bytes[0], '3');
37 EXPECT_EQ(Bytes[1], '4');
38
39 OS.seek(off: 4);
40 OS.write(Ptr: "xyz", Size: 3);
41
42 OS.seek(off: 0);
43 EXPECT_EQ(OS.read(Bytes, 8), 8);
44 EXPECT_EQ(Bytes[0], '0');
45 EXPECT_EQ(Bytes[1], '1');
46 EXPECT_EQ(Bytes[2], '2');
47 EXPECT_EQ(Bytes[3], '3');
48 EXPECT_EQ(Bytes[4], 'x');
49 EXPECT_EQ(Bytes[5], 'y');
50 EXPECT_EQ(Bytes[6], 'z');
51 EXPECT_EQ(Bytes[7], '7');
52}
53
54TEST(raw_fd_streamTest, DynCast) {
55 {
56 std::error_code EC;
57 raw_fd_stream OS("-", EC);
58 EXPECT_TRUE(dyn_cast<raw_fd_stream>(&OS));
59 }
60 {
61 std::error_code EC;
62 raw_fd_ostream OS("-", EC);
63 EXPECT_FALSE(dyn_cast<raw_fd_stream>(&OS));
64 }
65}
66
67} // namespace
68

source code of llvm/unittests/Support/raw_fd_stream_test.cpp