Update STJ validator tests

tests/javascript/test_stj_validator.test.js

@@ -51,11 +51,12 @@ test('Invalid STJ file with invalid word_timing_mode fails validation', (done) =
 });
 
 test('Invalid STJ file with zero-duration word without flag fails validation', (done) => {
-  runValidatorTest(
-    'zero_duration_word_without_flag.stj.json',
-    "Zero-duration word at 1 without 'word_duration' set to 'zero'",
-    done
-  );
+  const stjFile = path.join(__dirname, 'data', 'zero_duration_word_without_flag.stj.json');
+  exec(`node ${validator} ${stjFile} ${schemaFile}`, (error, stdout, stderr) => {
+    expect(error).not.toBeNull();
+    expect(stderr).toContain('Word "Zero" has zero duration (start: 1, end: 1)');
+    done();
+  });
 });
 
 test('Invalid STJ file with invalid confidence scores fails validation', (done) => {

tools/javascript/stj-validator.js

@@ -72,6 +72,7 @@ function validateStjData(data) {
   validateLanguageCodes(data);
   validateSegments(data);
   validateSpeakersAndStyles(data);
+  validateWordTimings(data.transcript);
 }
 
 function validateLanguageCodes(data) {
@@ -259,6 +260,23 @@ function validateWords(segment, segmentIndex) {
   }
 }
 
+function validateWordTimings(transcript) {
+  const segments = transcript.segments || [];
+
+  for (const segment of segments) {
+    const words = segment.words || [];
+
+    for (const word of words) {
+      // Check for zero duration words
+      if (word.start === word.end) {
+        throw new Error(`Word "${word.text}" has zero duration (start: ${word.start}, end: ${word.end})`);
+      }
+
+      // ... other word timing validations ...
+    }
+  }
+}
+
 // Add these utility functions at the top level
 function validateTimeValue(time, context) {
   // Check basic type and format