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
17 using namespace llvm;
18
19 namespace {
20
TEST(raw_fd_streamTest,ReadAfterWrite)21 TEST(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("01234567", 8);
33
34 OS.seek(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(4);
40 OS.write("xyz", 3);
41
42 OS.seek(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
TEST(raw_fd_streamTest,DynCast)54 TEST(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