Fixed minor bugs in libcppbor.

Fixed a dangling pointer issue in ViewBstr roundtrip test.

Used explicit template instantiation for basic_string_view in
tests instead of relying on template argument deduction.

Bug: 224815962
Change-Id: I21967e9bb0ca12653c3f4a0c1bb7a99441894dc4
Test: Corrected unit test. Existing test cases still pass.

2 files changed, 8 insertions, 6 deletions

diff --git a/src/cppbor.cpp b/src/cppbor.cpp
index 0e9c939..5c9827f 100644
--- a/src/cppbor.cpp
+++ b/src/cppbor.cpp
@@ -132,9 +132,8 @@ bool prettyPrintInternal(const Item* item, string& out, size_t indent, size_t ma
                 const ViewBstr* viewBstr = item->asViewBstr();
                 assert(viewBstr != nullptr);
 
-                std::basic_string_view view = viewBstr->view();
-                valueData = view.data();
-                valueSize = view.size();
+                valueData = viewBstr->view().data();
+                valueSize = viewBstr->view().size();
             }
 
             if (valueSize > maxBStrSize) {
diff --git a/tests/cppbor_test.cpp b/tests/cppbor_test.cpp
index ebdcc02..7756387 100644
--- a/tests/cppbor_test.cpp
+++ b/tests/cppbor_test.cpp
@@ -944,7 +944,7 @@ TEST(ConvertTest, ViewTstr) {
 
 TEST(ConvertTest, ViewBstr) {
     array<uint8_t, 3> vec{0x23, 0x24, 0x22};
-    basic_string_view sv(vec.data(), vec.size());
+    basic_string_view<uint8_t> sv(vec.data(), vec.size());
     unique_ptr<Item> item = details::makeItem(ViewBstr(sv));
 
     EXPECT_EQ(BSTR, item->type());
@@ -1081,7 +1081,7 @@ TEST(CloningTest, ViewTstr) {
 
 TEST(CloningTest, ViewBstr) {
     array<uint8_t, 5> vec{1, 2, 3, 255, 0};
-    basic_string_view sv(vec.data(), vec.size());
+    basic_string_view<uint8_t> sv(vec.data(), vec.size());
     ViewBstr item(sv);
     auto clone = item.clone();
     EXPECT_EQ(clone->type(), BSTR);
@@ -1707,11 +1707,14 @@ TEST(FullParserTest, ViewTstr) {
 }
 
 TEST(FullParserTest, ViewBstr) {
-    ViewBstr val("\x00\x01\x02"s);
+    const std::string strVal = "\x00\x01\x02"s;
+    const ViewBstr val(strVal);
+    EXPECT_EQ(val.toString(), "\x43\x00\x01\x02"s);
 
     auto enc = val.encode();
     auto [item, pos, message] = parseWithViews(enc.data(), enc.size());
     EXPECT_THAT(item, MatchesItem(val));
+    EXPECT_EQ(hexDump(item->toString()), hexDump(val.toString()));
 }
 
 TEST(FullParserTest, ReservedAdditionalInformation) {