Reduce duplication in Log filter implementations

src/test/java/fr/xephi/authme/output/ConsoleFilterTest.java

@@ -0,0 +1,77 @@
+package fr.xephi.authme.output;
+
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import java.util.logging.LogRecord;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/**
+ * Test for {@link ConsoleFilter}.
+ */
+public class ConsoleFilterTest {
+
+    private final ConsoleFilter filter = new ConsoleFilter();
+
+    private static final String SENSITIVE_COMMAND = "User issued server command: /login test test";
+    private static final String NORMAL_COMMAND = "User issued server command: /motd 2";
+
+
+    @Test
+    public void shouldReplaceSensitiveRecord() {
+        // given
+        LogRecord record = createRecord(SENSITIVE_COMMAND);
+
+        // when
+        boolean result = filter.isLoggable(record);
+
+        // then
+        assertThat(result, equalTo(true));
+        verify(record).setMessage("User issued an AuthMe command");
+    }
+
+    @Test
+    public void shouldNotFilterRegularCommand() {
+        // given
+        LogRecord record = createRecord(NORMAL_COMMAND);
+
+        // when
+        boolean result = filter.isLoggable(record);
+
+        // then
+        assertThat(result, equalTo(true));
+        verify(record, never()).setMessage("User issued an AuthMe command");
+    }
+
+    @Test
+    public void shouldManageRecordWithNullMessage() {
+        // given
+        LogRecord record = createRecord(null);
+
+        // when
+        boolean result = filter.isLoggable(record);
+
+        // then
+        assertThat(result, equalTo(true));
+        verify(record, never()).setMessage("User issued an AuthMe command");
+    }
+
+
+    /**
+     * Creates a mock of {@link LogRecord} and sets it to return the given message.
+     *
+     * @param message The message to set.
+     *
+     * @return Mock of LogRecord
+     */
+    private static LogRecord createRecord(String message) {
+        LogRecord record = Mockito.mock(LogRecord.class);
+        when(record.getMessage()).thenReturn(message);
+        return record;
+    }
+}