Separation of concerns between SWTConsole and Key listener.

made an interface for the listener to use. Added test of the listener
effects.

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc-swt/src/test/java/fr/bigeon/gclc/swt/HistoryTextKeyListenerTest.java

@@ -0,0 +1,158 @@
+/*
+ * Copyright E. Bigeon (2015)
+ *
+ * emmanuel@bigeon.fr
+ *
+ * This software is a computer program whose purpose is to
+ * provide a swt window for console applications.
+ *
+ * This software is governed by the CeCILL license under French law and
+ * abiding by the rules of distribution of free software.  You can  use,
+ * modify and/or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ *
+ * As a counterpart to the access to the source code and  rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty  and the software's author,  the holder of the
+ * economic rights,  and the successive licensors  have only  limited
+ * liability.
+ *
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading,  using,  modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean  that it is complicated to manipulate,  and  that  also
+ * therefore means  that it is reserved for developers  and  experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and,  more generally, to use and operate it in the
+ * same conditions as regards security.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+/**
+ * gclc-swt:fr.bigeon.gclc.swt.HistoryTextKeyListenerTest.java
+ * Created on: Nov 19, 2016
+ */
+package fr.bigeon.gclc.swt;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+
+import org.eclipse.swt.SWT;
+import org.junit.Test;
+
+/** <p>
+ * TODO
+ *
+ * @author Emmanuel Bigeon */
+public class HistoryTextKeyListenerTest {
+
+    /** Test method for
+     * {@link fr.bigeon.gclc.swt.HistoryTextKeyListener#keyPressed(org.eclipse.swt.events.KeyEvent)}. */
+    @Test
+    public final void testKeyPressedKeyEvent() {
+        ConsoleDelayIO io = new ConsoleDelayIO() {
+            private String input = "";
+
+            @Override
+            public void setPrompt(String prompt) {
+                //
+            }
+
+            @Override
+            public String prompt(String message) throws IOException {
+                return null;
+            }
+
+            @Override
+            public String prompt() throws IOException {
+                return null;
+            }
+
+            @Override
+            public void println(String message) throws IOException {
+                //
+            }
+
+            @Override
+            public void println() throws IOException {
+                //
+            }
+
+            @Override
+            public void print(String text) throws IOException {
+                //
+            }
+
+            @Override
+            public boolean isClosed() {
+                return false;
+            }
+
+            @Override
+            public String getPrompt() {
+                return null;
+            }
+
+            @Override
+            public void close() throws IOException {
+                //
+            }
+
+            @Override
+            public void validateInput() {
+                input = "";
+            }
+
+            @Override
+            public void setInput(String input) {
+                this.input = input;
+            }
+
+            @Override
+            public String getInput() {
+                return input;
+            }
+        };
+        HistoryTextKeyListener listener = new HistoryTextKeyListener(io);
+
+        // no effects
+        assertEquals("", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_DOWN);
+        assertEquals("", io.getInput());
+        listener.pressedKeyCode('\r');
+        assertEquals("", io.getInput());
+
+        io.setInput("cmd arg");
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("cmd arg", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_DOWN);
+        assertEquals("cmd arg", io.getInput());
+        listener.pressedKeyCode('\r');
+        assertEquals("", io.getInput());
+
+        io.setInput("cmd arg2");
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("cmd arg", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_DOWN);
+        assertEquals("", io.getInput());
+        io.setInput("cmd arg2");
+        listener.pressedKeyCode('\r');
+        assertEquals("", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("cmd arg2", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("cmd arg", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_UP);
+        assertEquals("cmd arg", io.getInput());
+        listener.pressedKeyCode(SWT.ARROW_DOWN);
+        assertEquals("cmd arg2", io.getInput());
+    }
+
+}