diff options
Diffstat (limited to 'unittests/Support/MemoryBufferTest.cpp')
-rw-r--r-- | unittests/Support/MemoryBufferTest.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/unittests/Support/MemoryBufferTest.cpp b/unittests/Support/MemoryBufferTest.cpp index 93bf301..1cdd6ad 100644 --- a/unittests/Support/MemoryBufferTest.cpp +++ b/unittests/Support/MemoryBufferTest.cpp @@ -169,4 +169,54 @@ TEST_F(MemoryBufferTest, getOpenFileReopened) { testGetOpenFileSlice(true); } + +TEST_F(MemoryBufferTest, slice) { + // Create a file that is six pages long with different data on each page. + int FD; + SmallString<64> TestPath; + sys::fs::createTemporaryFile("MemoryBufferTest_Slice", "temp", FD, TestPath); + raw_fd_ostream OF(FD, true, /*unbuffered=*/true); + for (unsigned i = 0; i < 0x2000 / 8; ++i) { + OF << "12345678"; + } + for (unsigned i = 0; i < 0x2000 / 8; ++i) { + OF << "abcdefgh"; + } + for (unsigned i = 0; i < 0x2000 / 8; ++i) { + OF << "ABCDEFGH"; + } + OF.close(); + + // Try offset of one page. + ErrorOr<OwningBuffer> MB = MemoryBuffer::getFileSlice(TestPath.str(), + 0x4000, 0x1000); + std::error_code EC = MB.getError(); + ASSERT_FALSE(EC); + EXPECT_EQ(0x4000UL, MB.get()->getBufferSize()); + + StringRef BufData = MB.get()->getBuffer(); + EXPECT_TRUE(BufData.substr(0x0000,8).equals("12345678")); + EXPECT_TRUE(BufData.substr(0x0FF8,8).equals("12345678")); + EXPECT_TRUE(BufData.substr(0x1000,8).equals("abcdefgh")); + EXPECT_TRUE(BufData.substr(0x2FF8,8).equals("abcdefgh")); + EXPECT_TRUE(BufData.substr(0x3000,8).equals("ABCDEFGH")); + EXPECT_TRUE(BufData.substr(0x3FF8,8).equals("ABCDEFGH")); + + // Try non-page aligned. + ErrorOr<OwningBuffer> MB2 = MemoryBuffer::getFileSlice(TestPath.str(), + 0x3000, 0x0800); + EC = MB2.getError(); + ASSERT_FALSE(EC); + EXPECT_EQ(0x3000UL, MB2.get()->getBufferSize()); + + StringRef BufData2 = MB2.get()->getBuffer(); + EXPECT_TRUE(BufData2.substr(0x0000,8).equals("12345678")); + EXPECT_TRUE(BufData2.substr(0x17F8,8).equals("12345678")); + EXPECT_TRUE(BufData2.substr(0x1800,8).equals("abcdefgh")); + EXPECT_TRUE(BufData2.substr(0x2FF8,8).equals("abcdefgh")); + +} + + + } |