Added unit tests for PLCMemory

Author: paulorb

src/test/kotlin/PlcMemoryTest.kt

@@ -0,0 +1,17 @@
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import kotlin.test.assertEquals
+
+class PlcMemoryTest {
+
+    @Test
+    fun `PlcMemory must be initialized with configured holding registers symbols`() {
+        val configuration = ConfigurationParser()
+        configuration.setReadFromResources(true)
+        configuration.setFileName("configuration_init.xml")
+        val plcMemory = PlcMemory(configuration)
+        val values = plcMemory.readHoldingRegister(14, 1)
+        assertEquals(1, values.size, )
+        assertEquals( values[0], 500)
+    }
+}

src/test/resources/configuration_init.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="US-ASCII" ?>
+<device ip="0.0.0.0" port="502">
+    <parameters>
+        <parameter symbol="PARAM_INT16" datatype="INT16">15</parameter>
+        <parameter symbol="PARAM_FLOAT32" datatype="FLOAT32">5.45</parameter>
+        <parameter symbol="PARAM_BOOL" datatype="BOOL">1</parameter>
+    </parameters>
+    <configuration initializeUndefinedRegisters="true" initialValue="0">
+        <registers>
+            <register addressType="HOLDING_REGISTER" address="14" symbol="RPM_MOTOR">500</register>
+        </registers>
+    </configuration>
+    <simulation plcScanTime="1000">
+        <delay>500</delay>
+    </simulation>
+</device>