Unit test for ReverseFileReader

git-svn-id: http://svn.dmdirc.com/trunk@3387 00569f92-eb28-0410-84fd-f71c24880f

test/com/dmdirc/addons/logging/ReverseFileReaderTest.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2006-2008 Chris Smith, Shane Mc Cormack, Gregory Holmes
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package com.dmdirc.addons.logging;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URISyntaxException;
+
+import java.util.Stack;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class ReverseFileReaderTest extends junit.framework.TestCase {
+
+    @Test
+    public void testIndividual() {
+        try {
+            final ReverseFileReader reader =
+                    new ReverseFileReader(new File(getClass().getClassLoader().
+                    getResource("com/dmdirc/addons/logging/test1.txt").
+                    toURI()));
+            assertEquals("Line 7", reader.getNextLine());
+            assertEquals("Line 6", reader.getNextLine());
+            assertEquals("Line 5", reader.getNextLine());
+            assertEquals("Line 4", reader.getNextLine());
+            assertEquals("Line 3", reader.getNextLine());
+            assertEquals("Line 2", reader.getNextLine());
+            assertEquals("Line 1", reader.getNextLine());
+            reader.close();
+        } catch (URISyntaxException ex) {
+            assertFalse(true);
+        } catch (IOException ex) {
+            assertFalse(true);
+        }
+    }
+    
+    @Test
+    public void testStack() {
+        try {
+            final ReverseFileReader reader =
+                    new ReverseFileReader(new File(getClass().getClassLoader().
+                    getResource("com/dmdirc/addons/logging/test1.txt").
+                    toURI()));
+            final Stack<String> lines = reader.getLines(10);
+            
+            assertEquals(7, lines.size());
+            assertEquals("Line 1", lines.pop());
+            assertEquals("Line 2", lines.pop());
+            assertEquals("Line 3", lines.pop());
+            assertEquals("Line 4", lines.pop());
+            assertEquals("Line 5", lines.pop());
+            assertEquals("Line 6", lines.pop());
+            assertEquals("Line 7", lines.pop());
+            reader.close();
+        } catch (URISyntaxException ex) {
+            assertFalse(true);
+        } catch (IOException ex) {
+            assertFalse(true);
+        }
+    }
+    
+    @Test
+    public void testSmallStack() {
+        try {
+            final ReverseFileReader reader =
+                    new ReverseFileReader(new File(getClass().getClassLoader().
+                    getResource("com/dmdirc/addons/logging/test1.txt").
+                    toURI()));
+            final Stack<String> lines = reader.getLines(3);
+            
+            assertEquals(3, lines.size());
+            assertEquals("Line 5", lines.pop());
+            assertEquals("Line 6", lines.pop());
+            assertEquals("Line 7", lines.pop());
+            reader.close();
+        } catch (URISyntaxException ex) {
+            assertFalse(true);
+        } catch (IOException ex) {
+            assertFalse(true);
+        }
+    }
+    
+    @Test
+    public void testReset() {
+        try {
+            final ReverseFileReader reader =
+                    new ReverseFileReader(new File(getClass().getClassLoader().
+                    getResource("com/dmdirc/addons/logging/test1.txt").
+                    toURI()));
+            assertEquals("Line 7", reader.getNextLine());
+            assertEquals("Line 6", reader.getNextLine());
+            reader.reset();
+            assertEquals("Line 7", reader.getNextLine());
+            assertEquals("Line 6", reader.getNextLine());
+            assertEquals("Line 5", reader.getNextLine());
+            reader.close();
+        } catch (URISyntaxException ex) {
+            assertFalse(true);
+        } catch (IOException ex) {
+            assertFalse(true);
+        }
+    }    
+
+}

test/com/dmdirc/addons/logging/test1.txt

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+Line 1
+Line 2
+Line 3
+Line 4
+Line 5
+Line 6
+Line 7