Decorate ran tests on failure

tests/schema/helpers.js

@@ -59,13 +59,14 @@ export function getTests(srcDir) {
   return { only, all };
 }
 
-export function tryTest(test, refs, schema) {
+export function tryTest(nth, max, test, refs, schema) {
   return _jsf.resolve(schema, refs).then(sample => {
     if (test.dump) {
       console.log(JSON.stringify(sample, null, 2));
       return;
     }
 
+    try {
       if (test.type) {
         checkType(sample, test.type);
       }
@@ -73,6 +74,13 @@ export function tryTest(test, refs, schema) {
       if (test.valid) {
         checkSchema(sample, schema, refs);
       }
+    } catch (e) {
+      const _e = new Error(`${e.message.split('\n')[0]} (${nth} of ${max})`);
+
+      _e.stack = e.stack.split('\n').slice(1).join('\n');
+
+      throw _e;
+    }
 
     if (test.length) {
       expect(sample.length).to.eql(test.length);

tests/schema/main.spec.js

@@ -54,13 +54,15 @@ function seed() {
 
         // support for "exhaustive" testing, increase or set in .json spec
         // for detecting more bugs quickly by executing the same test N-times
-        let nth = test.repeat || (process.CI ? 100 : 10);
+        const max = test.repeat || (process.CI ? 100 : 10);
+
+        let nth = max;
 
         const tasks = [];
 
         while (nth) {
           if (!test.skip) {
-            tasks.push(tryTest(test, refs, schema));
+            tasks.push(tryTest(nth, max, test, refs, schema));
           }
 
           nth -= 1;