Add test for tiny documents

Author: tonybaloney

app/indexer/core/src/test/java/com/microsoft/openai/samples/indexer/parser/TextSplitterTest.java

@@ -0,0 +1,22 @@
+package com.microsoft.openai.samples.indexer.parser;
+
+import com.microsoft.openai.samples.indexer.SplitPage;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TextSplitterTest {
+
+    @Test
+    void testSplitTinyPages() {
+        List<Page> testPages = List.of(new Page[]{
+                new Page(1, 0, "hello, world")
+        });
+        TextSplitter splitter = new TextSplitter(false);
+        List<SplitPage> result = splitter.splitPages(testPages);
+        assertEquals(1, result.size());
+        assertEquals("hello, world", result.get(0).getText());
+    }
+}