Fixes data parameter not being sent in ajax request for jobs log

app/assets/javascripts/build.js

@@ -167,7 +167,7 @@ window.Build = (function () {
   Build.prototype.getBuildTrace = function () {
     return $.ajax({
       url: `${this.pageUrl}/trace.json`,
-      data: this.state,
+      data: { state: this.state },
     })
       .done((log) => {
         setCiStatusFavicon(`${this.pageUrl}/status.json`);

changelogs/unreleased/38528-build-url.yml

+---
+title: Fixes data parameter not being sent in ajax request for jobs log
+merge_request:
+author:
+type: fixed

spec/javascripts/build_spec.js

@@ -289,4 +289,18 @@ describe('Build', () => {
       });
     });
   });
+
+  describe('getBuildTrace', () => {
+    it('should request build trace with state parameter', (done) => {
+      spyOn(jQuery, 'ajax').and.callThrough();
+      new Build();
+
+      setTimeout(() => {
+        expect(jQuery.ajax).toHaveBeenCalledWith(
+          { url: `${BUILD_URL}/trace.json`, data: { state: '' } },
+        );
+        done();
+      }, 0);
+    });
+  });
 });