adding tests

slsDetectorSoftware/tests/test-SharedMemory.cpp

@@ -1,18 +1,17 @@
 
-#include "catch.hpp"
 #include "SharedMemory.h"
+#include "catch.hpp"
 #include "string_utils.h"
 
+struct Data {
+    int x;
+    double y;
+    char mess[50];
+};
 
-TEST_CASE("SharedMemory") {
-    struct Data{
-        int x;
-        double y;
-        char mess[50];
-    };
+TEST_CASE("Create SharedMemory read and write") {
 
-    
-    SharedMemory<Data> shm(0,-1);
+    SharedMemory<Data> shm(0, -1);
     shm.CreateSharedMemory();
     CHECK(shm.GetName() == "/slsDetectorPackage_multi_0");
 
@@ -26,5 +25,54 @@ TEST_CASE("SharedMemory") {
 
     shm.UnmapSharedMemory();
     shm.RemoveSharedMemory();
+}
 
+TEST_CASE("Open existing SharedMemory and read") {
+
+    SharedMemory<double> shm(0, -1);
+    shm.CreateSharedMemory();
+    *shm() = 5.3;
+    shm.UnmapSharedMemory();
+
+    SharedMemory<double> shm2(0, -1);
+    shm2.OpenSharedMemory();
+    CHECK(*shm2() == 5.3);
+
+    shm2.RemoveSharedMemory();
+}
+
+TEST_CASE("Two shared memories with the same name throws") {
+
+    SharedMemory<double> shm0(0, -1);
+    SharedMemory<double> shm1(0, -1);
+
+    shm0.CreateSharedMemory();
+    CHECK_THROWS(shm1.CreateSharedMemory());
+    shm0.RemoveSharedMemory();
+}
+
+TEST_CASE("Open two shared memories to the same place") {
+
+    //Create the first shared memory
+    SharedMemory<Data> shm(0, -1);
+    shm.CreateSharedMemory();
+    shm()->x = 5;
+    CHECK(shm()->x == 5);
+
+    //Open the second shared memory with the same name
+    SharedMemory<Data> shm2(0, -1);
+    shm2.OpenSharedMemory();
+    CHECK(shm2()->x == 5);
+    CHECK(shm.GetName() == shm2.GetName());
+
+    //Check that they still point to the same place
+    shm2()->x = 7;
+    CHECK(shm()->x == 7);
+
+
+    //Remove only needs to be done once since they refer 
+    //to the same memory
+    shm2.RemoveSharedMemory();
+    CHECK(shm.IsExisting() == false);
+    CHECK(shm2.IsExisting() == false);
 }