test: add validation for chunk_counts sum in test macro

Add assertion to verify that the sum of chunk_counts equals total_chunks.
This ensures all chunk types are properly accounted for in test expectations.

Also improve error messages to show actual chunk_counts distribution
when assertion fails, making it easier to fix test expectations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: unhappychoice

tests/integration/languages/extractor.rs

@@ -34,20 +34,33 @@ macro_rules! test_language_extractor {
                 test_extraction_options()
             ).unwrap();
 
+
+            // Check chunk counts by type
+            let mut chunk_counts: HashMap<ChunkType, usize> = HashMap::new();
+            for chunk in &chunks {
+                *chunk_counts.entry(chunk.chunk_type.clone()).or_insert(0) += 1;
+            }
+
             // Check total chunk count
             assert_eq!(
                 chunks.len(),
                 $total,
-                "Expected {} total chunks, got {}",
+                "Expected {} total chunks, got {}\nExpected: {:?}",
                 $total,
-                chunks.len()
+                chunks.len(),
+                chunk_counts
             );
 
-            // Check chunk counts by type
-            let mut chunk_counts: HashMap<ChunkType, usize> = HashMap::new();
-            for chunk in &chunks {
-                *chunk_counts.entry(chunk.chunk_type.clone()).or_insert(0) += 1;
-            }
+            // Verify that the sum of expected chunk counts equals total_chunks
+            let expected_sum: usize = 0 $(+ $count)*;
+            assert_eq!(
+                expected_sum,
+                $total,
+                "Sum of chunk_counts ({}) must equal total_chunks ({}).\nThis ensures all chunk types are accounted for.\nExpected: {:?}",
+                expected_sum,
+                $total,
+                chunk_counts
+            );
 
             $(
                 let expected_count = $count;