Initial commit

src/test/java/org/scribe/utils/MapUtilsTest.java

@@ -0,0 +1,53 @@
+package org.scribe.utils;
+
+import static org.junit.Assert.*;
+
+import java.util.*;
+
+import org.junit.*;
+
+public class MapUtilsTest
+{
+
+  private Map<String, String> unsorted;
+
+  @Before
+  public void setup()
+  {
+    unsorted = new LinkedHashMap<String, String>();
+    unsorted.put("d", "fourth");
+    unsorted.put("a", "first");
+    unsorted.put("c", "third");
+    unsorted.put("b", "second");
+  }
+
+  @Test
+  public void shouldSortMap()
+  {
+    Map<String, String> sorted = MapUtils.sort(unsorted);
+    List<String> values = new ArrayList<String>(sorted.values());
+    assertEquals("first", values.get(0));
+    assertEquals("second", values.get(1));
+    assertEquals("third", values.get(2));
+    assertEquals("fourth", values.get(3));
+  }
+
+  @Test
+  public void shouldNotModifyTheOriginalMap()
+  {
+    Map<String, String> sorted = MapUtils.sort(unsorted);
+    assertNotSame(sorted, unsorted);
+
+    List<String> values = new ArrayList<String>(unsorted.values());
+    assertEquals("fourth", values.get(0));
+    assertEquals("first", values.get(1));
+    assertEquals("third", values.get(2));
+    assertEquals("second", values.get(3));
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void shouldThrowExceptionForNullMap()
+  {
+    MapUtils.sort(null);
+  }
+}