History object tests (#4314)

* Adds History object tests

* Updated blob tests to use a non-pointer variable

isis/src/base/objs/Blob/Blob.h

@@ -54,6 +54,7 @@ namespace Isis {
       Blob(const QString &name, const QString &type,
            const QString &file);
       Blob(const Blob &other);
+      Blob() = default;
       Blob &operator=(const Blob &other);
 
       virtual ~Blob();

isis/tests/Fixtures.cpp

@@ -959,4 +959,41 @@ namespace Isis {
     testCam = testCube->camera();
   }
 
+  void HistoryBlob::SetUp() {
+    TempTestingFiles::SetUp();
+
+    std::istringstream hss(R"(
+      Object = mroctx2isis
+        IsisVersion       = "4.1.0  | 2020-07-01"
+        ProgramVersion    = 2016-06-10
+        ProgramPath       = /Users/acpaquette/repos/ISIS3/build/bin
+        ExecutionDateTime = 2020-07-01T16:48:40
+        HostName          = Unknown
+        UserName          = acpaquette
+        Description       = "Import an MRO CTX image as an Isis cube"
+
+        Group = UserParameters
+          FROM    = /Users/acpaquette/Desktop/J03_045994_1986_XN_18N282W.IMG
+          TO      = /Users/acpaquette/Desktop/J03_045994_1986_XN_18N282W_isis.cub
+          SUFFIX  = 18
+          FILLGAP = true
+        End_Group
+      End_Object)");
+
+    hss >> historyPvl;
+
+    std::ostringstream ostr;
+    ostr << historyPvl;
+    std::string histStr = ostr.str();
+    int nbytes = histStr.size();
+
+    // Don't worry about cleaning up this buffer
+    // The blob takes ownership of it and handles freeing the memory in
+    // its decontructor
+    char *buffer = new char[nbytes];
+    memcpy(buffer, histStr.c_str(), nbytes);
+
+    historyBlob = Blob("IsisCube", "History");
+    historyBlob.setData(buffer, nbytes);
+  }
 }

isis/tests/Fixtures.h

@@ -249,6 +249,14 @@ class CSMCameraDemFixture : public CSMCubeFixture {
 
     void SetUp() override;
 };
+
+class HistoryBlob : public TempTestingFiles {
+  protected:
+    Blob historyBlob;
+    PvlObject historyPvl;
+
+    void SetUp() override;
+};
 }
 
 #endif

isis/tests/HistoryTests.cpp

@@ -0,0 +1,48 @@
+#include "Fixtures.h"
+#include "History.h"
+
+#include "gmock/gmock.h"
+
+using namespace Isis;
+
+TEST(HistoryTests, HistoryTestsDefaultConstructor) {
+  History history;
+
+  Pvl historyPvl  = history.ReturnHist();
+  EXPECT_EQ(historyPvl.groups(), 0);
+}
+
+TEST_F(HistoryBlob, HistoryTestsFromBlob) {
+  History readHistory(historyBlob);
+
+  Pvl historyPvl = readHistory.ReturnHist();
+  ASSERT_TRUE(historyPvl.hasObject("mroctx2isis"));
+  EXPECT_TRUE(historyPvl.findObject("mroctx2isis").hasGroup("UserParameters"));
+}
+
+TEST_F(HistoryBlob, HistoryTestsAddEntry) {
+  History history;
+
+  history.AddEntry(historyPvl);
+
+  Pvl newHistoryPvl = history.ReturnHist();
+  ASSERT_TRUE(newHistoryPvl.hasObject("mroctx2isis"));
+  EXPECT_TRUE(newHistoryPvl.findObject("mroctx2isis").hasGroup("UserParameters"));
+}
+
+TEST_F(HistoryBlob, HistoryTeststoBlob) {
+  History history(historyBlob);
+
+  Blob *blob = history.toBlob();
+
+  std::stringstream os;
+  char *blob_buffer = blob->getBuffer();
+  Pvl newHistoryPvl;
+  for (int i = 0; i < blob->Size(); i++) {
+    os << blob_buffer[i];
+  }
+  os >> newHistoryPvl;
+
+  ASSERT_TRUE(newHistoryPvl.hasObject("mroctx2isis"));
+  EXPECT_TRUE(newHistoryPvl.findObject("mroctx2isis").hasGroup("UserParameters"));
+}