Test functionality of Source helper class

This change introduces unit tests for Source class,
which is a helper of ocloc_arg_helper.

The original functionality has been improved to preserve
last line even if it does not contain trailing new line sign.
Moreover, empty lines are skipped since this change.

Signed-off-by: Patryk Wrobel <patryk.wrobel@intel.com>

opencl/test/unit_test/offline_compiler/offline_compiler_tests.cpp

@@ -2146,6 +2146,69 @@ TEST(OclocArgHelperTest, GivenOutputSuppressMessagesAndSaveItToFile) {
     delete[] lenOutputs;
 }
 
+TEST(OclocArgHelperTest, GivenValidSourceFileWhenRequestingVectorOfStringsThenLinesAreStored) {
+    const char input[] = "First\nSecond\nThird";
+    const auto inputLength{sizeof(input)};
+    const auto filename{"some_file.txt"};
+
+    Source source{reinterpret_cast<const uint8_t *>(input), inputLength, filename};
+
+    std::vector<std::string> lines{};
+    source.toVectorOfStrings(lines);
+
+    ASSERT_EQ(3u, lines.size());
+
+    EXPECT_EQ("First", lines[0]);
+    EXPECT_EQ("Second", lines[1]);
+    EXPECT_EQ("Third", lines[2]);
+}
+
+TEST(OclocArgHelperTest, GivenSourceFileWithTabsWhenRequestingVectorOfStringsWithTabsReplacementThenLinesWithSpacesAreStored) {
+    const char input[] = "First\tWord\nSecond\tWord\nThird\tWord";
+    const auto inputLength{sizeof(input)};
+    const auto filename{"some_file.txt"};
+
+    Source source{reinterpret_cast<const uint8_t *>(input), inputLength, filename};
+
+    constexpr bool replaceTabs{true};
+    std::vector<std::string> lines{};
+    source.toVectorOfStrings(lines, replaceTabs);
+
+    ASSERT_EQ(3u, lines.size());
+
+    EXPECT_EQ("First Word", lines[0]);
+    EXPECT_EQ("Second Word", lines[1]);
+    EXPECT_EQ("Third Word", lines[2]);
+}
+
+TEST(OclocArgHelperTest, GivenSourceFileWithEmptyLinesWhenRequestingVectorOfStringsThenOnlyNonEmptyLinesAreStored) {
+    const char input[] = "First\n\n\nSecond\n";
+    const auto inputLength{sizeof(input)};
+    const auto filename{"some_file.txt"};
+
+    Source source{reinterpret_cast<const uint8_t *>(input), inputLength, filename};
+
+    std::vector<std::string> lines{};
+    source.toVectorOfStrings(lines);
+
+    ASSERT_EQ(2u, lines.size());
+
+    EXPECT_EQ("First", lines[0]);
+    EXPECT_EQ("Second", lines[1]);
+}
+
+TEST(OclocArgHelperTest, GivenSourceFileWhenRequestingBinaryVectorThenBinaryIsReturned) {
+    const char input[] = "A file content";
+    const auto inputLength{sizeof(input)};
+    const auto filename{"some_file.txt"};
+
+    Source source{reinterpret_cast<const uint8_t *>(input), inputLength, filename};
+    const auto binaryContent = source.toBinaryVector();
+
+    ASSERT_EQ(inputLength, binaryContent.size());
+    ASSERT_TRUE(std::equal(binaryContent.begin(), binaryContent.end(), input));
+}
+
 TEST(OclocArgHelperTest, GivenNoOutputPrintMessages) {
     auto helper = WhiteBoxOclocArgHelper(0, nullptr, nullptr, nullptr,
                                          0, nullptr, nullptr, nullptr,

shared/offline_compiler/source/ocloc_arg_helper.cpp

@@ -25,13 +25,19 @@ void Source::toVectorOfStrings(std::vector<std::string> &lines, bool replaceTabs
         if (replaceTabs && *file == '\t') {
             line += ' ';
         } else if (*file == '\n') {
+            if (!line.empty()) {
                 lines.push_back(line);
                 line = "";
+            }
         } else {
             line += *file;
         }
         file++;
     }
+
+    if (!line.empty()) {
+        lines.push_back(std::move(line));
+    }
 }
 
 Output::Output(const std::string &name, const void *data, const size_t &size)