add test for new memory access function

tests/test_plc_read.py

@@ -134,3 +134,32 @@ def test_comapare_values(address: str, timeout: float):
             assert v1 == v2
 
     lsv2.disconnect()
+
+
+def test_plc_mem_access(address: str, timeout: float):
+    """test to see if reading via plc address and plc memory returns the same value"""
+
+    lsv2 = pyLSV2.LSV2(address, port=19000, timeout=timeout, safe_mode=False)
+    lsv2.connect()
+
+    for mem_address in [0, 1, 2, 4, 8, 12, 68, 69, 151, 300, 420]:
+        v1 = lsv2.read_plc_memory(mem_address, pyLSV2.MemoryType.DWORD, 1)[0]
+        v2 = lsv2.read_plc_address("D%d" % (mem_address * 4))
+        assert v1 == v2
+
+    for mem_address in [0, 1, 2, 4, 8, 12, 68, 69, 151, 300, 420]:
+        v1 = lsv2.read_plc_memory(mem_address, pyLSV2.MemoryType.WORD, 1)[0]
+        v2 = lsv2.read_plc_address("W%d" % (mem_address * 2))
+        assert v1 == v2
+
+    for mem_address in [0, 1, 2, 4, 8, 12, 68, 69, 151, 300, 420]:
+        v1 = lsv2.read_plc_memory(mem_address, pyLSV2.MemoryType.BYTE, 1)[0]
+        v2 = lsv2.read_plc_address("B%d" % (mem_address * 1))
+        assert v1 == v2
+
+    for mem_address in [0, 1, 2, 4, 8, 12, 68, 69, 151, 300, 420]:
+        v1 = lsv2.read_plc_memory(mem_address, pyLSV2.MemoryType.MARKER, 1)[0]
+        v2 = lsv2.read_plc_address("M%d" % (mem_address * 1))
+        assert v1 == v2
+
+    lsv2.disconnect()