Add unit test for diagnostics file list builder

Author: Dingane Hlaluku

server/src/test/java/org/apache/cloudstack/diagnostics/DiagnosticsFilesListFactoryTest.java

@@ -0,0 +1,66 @@
+package org.apache.cloudstack.diagnostics;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import com.cloud.vm.VMInstanceVO;
+import com.cloud.vm.VirtualMachine;
+import org.apache.cloudstack.framework.config.ConfigKey;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import static org.junit.Assert.*;
+
+@RunWith(MockitoJUnitRunner.class)
+public class DiagnosticsFilesListFactoryTest {
+
+    private ConsoleProxyDiagnosticFiles proxyDiagnosticFiles;
+
+    @Mock
+    private VMInstanceVO vmInstance;
+
+    @InjectMocks
+    private DiagnosticsFilesListFactory listFactory = new DiagnosticsFilesListFactory();
+
+    @Before
+    public void setUp() throws Exception {
+        Mockito.when(vmInstance.getType()).thenReturn(VirtualMachine.Type.ConsoleProxy);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        Mockito.reset(vmInstance);
+    }
+
+    @Test
+    public void testgetDiagnosticsFilesListCpVmDataTypeList() {
+        List<String> dataTypeList = new ArrayList<>();
+        dataTypeList.add("/var/log/auth.log");
+        dataTypeList.add("/etc/dnsmasq.conf");
+        dataTypeList.add("[IPTABLES]");
+        dataTypeList.add("[IFCONFIG]");
+
+        List<String> files = listFactory.getDiagnosticsFilesList(dataTypeList, vmInstance).generateFileList();
+
+        assertEquals(files, dataTypeList);
+
+    }
+
+    @Test
+    public void testDiagnisticsFileListDefaultsCpvm() {
+        List<String> filesList = listFactory.getDiagnosticsFilesList(null, vmInstance).generateFileList();
+
+        ConfigKey configKey = proxyDiagnosticFiles.CpvmDefaultSupportedFiles;
+        String[] defaultFileArray = configKey.defaultValue().split(",");
+
+        assertEquals(filesList.size(), defaultFileArray.length);
+    }
+}