PEL: Add class to wrap AdditionalData

The AdditionalData property on the xyz.openbmc_project.Logging.Entry
interface is a vector of strings of the form:  "KEY=VALUE".  The
PEL processing code will be interested in those keys and values, and
this class adds a way to get at those values based on a key without
having to do string parsing each time.  It returns an
std::optional<std::string> value, and if the key isn't found, then the
std::optional value will be empty.

For Example:
    AdditionalData ad{additionalDataPropertyValue};

    // Get the value for the FOO key
    std::optional<std::string> val = ad.getValue("FOO");

    if (val)
        std::cout << (*val).size();

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I6ba458840278784b1cc6a0ed88a7fece8794df7d

3 files changed, 41 insertions, 0 deletions

diff --git a/test/Makefile.am b/test/Makefile.am
index a95677d..6499764 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -110,3 +110,7 @@ extensions_test_LDFLAGS = $(test_ldflags)
 
 # TODO Remove once the test-case failure is resolved openbmc/phosphor-logging#11
 XFAIL_TESTS = elog_errorwrap_test
+
+if ENABLE_PEL_EXTENSION
+include openpower-pels/Makefile.include
+endif
diff --git a/test/openpower-pels/Makefile.include b/test/openpower-pels/Makefile.include
new file mode 100644
index 0000000..98a0acd
--- /dev/null
+++ b/test/openpower-pels/Makefile.include
@@ -0,0 +1,10 @@
+TESTS += $(check_PROGRAMS)
+
+check_PROGRAMS += \
+	additional_data_test
+
+additional_data_test_SOURCES = %reldir%/additional_data_test.cpp
+additional_data_test_CPPFLAGS = $(test_cppflags)
+additional_data_test_CXXFLAGS = $(test_cxxflags)
+additional_data_test_LDADD = $(test_ldadd)
+additional_data_test_LDFLAGS = $(test_ldflags)
diff --git a/test/openpower-pels/additional_data_test.cpp b/test/openpower-pels/additional_data_test.cpp
new file mode 100644
index 0000000..2be06c4
--- /dev/null
+++ b/test/openpower-pels/additional_data_test.cpp
@@ -0,0 +1,27 @@
+#include "extensions/openpower-pels/additional_data.hpp"
+
+#include <gtest/gtest.h>
+
+using namespace openpower::pels;
+
+TEST(AdditionalDataTest, GetKeywords)
+{
+    std::vector<std::string> data{"KEY1=VALUE1", "KEY2=VALUE2",
+                                  "KEY3=", "HELLOWORLD", "=VALUE5"};
+    AdditionalData ad{data};
+
+    EXPECT_TRUE(ad.getValue("KEY1"));
+    EXPECT_EQ(*(ad.getValue("KEY1")), "VALUE1");
+
+    EXPECT_TRUE(ad.getValue("KEY2"));
+    EXPECT_EQ(*(ad.getValue("KEY2")), "VALUE2");
+
+    EXPECT_FALSE(ad.getValue("x"));
+
+    auto value3 = ad.getValue("KEY3");
+    EXPECT_TRUE(value3);
+    EXPECT_TRUE((*value3).empty());
+
+    EXPECT_FALSE(ad.getValue("HELLOWORLD"));
+    EXPECT_FALSE(ad.getValue("VALUE5"));
+}