buffer lets you split a list into smaller max-size ones

1 files changed, 54 insertions, 0 deletions

diff --git a/tests/src/cgeo/geocaching/utils/MiscUtilsTest.java b/tests/src/cgeo/geocaching/utils/MiscUtilsTest.java
new file mode 100644
index 0000000..2ee99c4
--- /dev/null
+++ b/tests/src/cgeo/geocaching/utils/MiscUtilsTest.java
@@ -0,0 +1,54 @@
+package cgeo.geocaching.utils;
+
+import junit.framework.TestCase;
+
+import java.util.LinkedList;
+import java.util.List;
+
+public class MiscUtilsTest extends TestCase {
+
+    public static void testBufferEmpty() {
+        for (final List<String> s: MiscUtils.buffer(new LinkedList<String>(), 10)) {
+            fail("empty collection should not iterate");
+        }
+    }
+
+    public static void testMultiple() {
+        final List<Integer> list = new LinkedList<Integer>();
+        for (int i = 0; i < 50; i++) {
+            list.add(i);
+        }
+        int count = 0;
+        for (final List<Integer> subList: MiscUtils.buffer(list, 10)) {
+            assertEquals("each sublist has the right size", 10, subList.size());
+            assertEquals("sublist has the right content", count * 10, (int) subList.get(0));
+            count++;
+        }
+        assertEquals("there are the right number of sublists", 5, count);
+    }
+
+    public static void testNonMultiple() {
+        final List<Integer> list = new LinkedList<Integer>();
+        for (int i = 0; i < 48; i++) {
+            list.add(i);
+        }
+        int count = 0;
+        for (final List<Integer> subList: MiscUtils.buffer(list, 10)) {
+            assertTrue("each sublist has no more than the allowed number of arguments", subList.size() <= 10);
+            count += subList.size();
+        }
+        assertEquals("all the elements were seen", 48, count);
+    }
+
+    public static void testArguments() {
+        try {
+            MiscUtils.buffer(new LinkedList<Integer>(), 0);
+            fail("an exception should be raised");
+        } catch (final IllegalArgumentException e) {
+            // Ok
+        } catch (final Exception e) {
+            fail("bad exception raised: " + e);
+        }
+    }
+
+}