feat: add config recursive chunker tests

jchunk-recursive-character/src/main/java/jchunk/chunker/recursive/Config.java

@@ -1,5 +1,7 @@
 package jchunk.chunker.recursive;
 
+import org.springframework.util.Assert;
+
 import java.util.List;
 
 /**
@@ -56,11 +58,13 @@ public static class Builder {
 		private List<String> separators = List.of("\n\n", "\n", " ", "");
 
 		public Builder chunkSize(Integer chunkSize) {
+			Assert.isTrue(chunkSize > 0, "Chunk size must be greater than 0");
 			this.chunkSize = chunkSize;
 			return this;
 		}
 
 		public Builder chunkOverlap(Integer chunkOverlap) {
+			Assert.isTrue(chunkOverlap >= 0, "Chunk overlap must be greater than or equal to 0");
 			this.chunkOverlap = chunkOverlap;
 			return this;
 		}
@@ -71,6 +75,7 @@ public Builder separators(List<String> separators) {
 		}
 
 		public Config build() {
+			Assert.isTrue(chunkSize > chunkOverlap, "Chunk size must be greater than chunk overlap");
 			return new Config(chunkSize, chunkOverlap, separators);
 		}
 

jchunk-recursive-character/src/test/java/ConfigTest.java

@@ -0,0 +1,32 @@
+import jchunk.chunker.recursive.Config;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ConfigTest {
+
+    @Test
+    void testDefaultConfig() {
+        Config config = Config.defaultConfig();
+
+        assertThat(config.getChunkSize()).isEqualTo(100);
+        assertThat(config.getChunkOverlap()).isEqualTo(20);
+        assertThat(config.getSeparators()).containsExactly("\n\n", "\n", " ", "");
+    }
+
+    @Test
+    void testCustomConfig() {
+        Config config = Config.builder()
+                .chunkSize(50)
+                .chunkOverlap(10)
+                .separators(List.of("-", "!", "?"))
+                .build();
+
+        assertThat(config.getChunkSize()).isEqualTo(50);
+        assertThat(config.getChunkOverlap()).isEqualTo(10);
+        assertThat(config.getSeparators()).containsExactly("-", "!", "?");
+    }
+
+}

jchunk-recursive-character/src/test/java/RecursiveCharacterChunkerTest.java

@@ -6,7 +6,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class RecursiveCharacterChunkerTest {
+class RecursiveCharacterChunkerTest {
 
 	RecursiveCharacterChunker chunker = new RecursiveCharacterChunker();
 
@@ -19,7 +19,7 @@ public class RecursiveCharacterChunkerTest {
 			""";
 
 	@Test
-	public void testSplit() {
+	void testSplit() {
 		List<Chunk> expectedChunks = List.of(
 				new Chunk(0, "One of the most important things I didn't understand about the"),
 				new Chunk(1, "world when I was a child is the degree to which the returns for"),
@@ -39,8 +39,7 @@ public void testSplit() {
 
 		List<Chunk> chunks = chunker.split(content);
 
-		assertThat(chunks).isNotNull();
-		assertThat(chunks).hasSize(expectedChunks.size());
+		assertThat(chunks).isNotNull().hasSize(expectedChunks.size());
 
 		for (int i = 0; i < chunks.size(); i++) {
 			assertThat(chunks.get(i).id()).isEqualTo(expectedChunks.get(i).id());