test: Add test for GetVersions()

Also split and rename the cases in utest.cpp into test_signature and
test_version.

Tested: Verify test is built and passed.

Change-Id: Ibe59355936d9366be8e3f56760bff7384a28a28c
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/test/test_version.cpp b/test/test_version.cpp
new file mode 100644
index 0000000..a44edd8
--- /dev/null
+++ b/test/test_version.cpp
@@ -0,0 +1,58 @@
+#include "version.hpp"
+
+#include <openssl/sha.h>
+
+#include <gtest/gtest.h>
+
+using namespace openpower::software::updater;
+
+/** @brief Make sure we correctly get the Id from getId()*/
+TEST(VersionTest, TestGetId)
+{
+    auto version = "test-id";
+    unsigned char digest[SHA512_DIGEST_LENGTH];
+    SHA512_CTX ctx;
+    SHA512_Init(&ctx);
+    SHA512_Update(&ctx, version, strlen(version));
+    SHA512_Final(digest, &ctx);
+    char mdString[SHA512_DIGEST_LENGTH * 2 + 1];
+    for (int i = 0; i < SHA512_DIGEST_LENGTH; i++)
+    {
+        snprintf(&mdString[i * 2], 3, "%02x", (unsigned int)digest[i]);
+    }
+    std::string hexId = std::string(mdString);
+    hexId = hexId.substr(0, 8);
+    EXPECT_EQ(Version::getId(version), hexId);
+}
+
+TEST(VersionTest, GetVersions)
+{
+    constexpr auto versionString =
+        "open-power-romulus-v2.2-rc1-48-g268344f-dirty\n"
+        "\tbuildroot-2018.11.1-7-g5d7cc8c\n"
+        "\tskiboot-v6.2\n"
+        "\thostboot-3f1f218-pea87ca7\n"
+        "\tocc-12c8088\n"
+        "\tlinux-4.19.13-openpower1-p8031295\n"
+        "\tpetitboot-1.9.2\n"
+        "\tmachine-xml-7410460\n"
+        "\thostboot-binaries-hw121518a.930\n"
+        "\tcapp-ucode-p9-dd2-v4\n"
+        "\tsbe-cf61dc3\n"
+        "\thcode-hw123119a.930";
+
+    const auto& [version, extendedVersion] =
+        Version::getVersions(versionString);
+    EXPECT_EQ(version, "open-power-romulus-v2.2-rc1-48-g268344f-dirty");
+    EXPECT_EQ(extendedVersion, "buildroot-2018.11.1-7-g5d7cc8c,"
+                               "skiboot-v6.2,"
+                               "hostboot-3f1f218-pea87ca7,"
+                               "occ-12c8088,"
+                               "linux-4.19.13-openpower1-p8031295,"
+                               "petitboot-1.9.2,"
+                               "machine-xml-7410460,"
+                               "hostboot-binaries-hw121518a.930,"
+                               "capp-ucode-p9-dd2-v4,"
+                               "sbe-cf61dc3,"
+                               "hcode-hw123119a.930");
+}