fix(trace): waitForLoadState title

Author: Skn0tt

playwright/src/main/java/com/microsoft/playwright/impl/PageImpl.java

@@ -1357,10 +1357,13 @@ public JSHandle waitForFunction(String pageFunction, Object arg, WaitForFunction
   }
 
   @Override
-  public void waitForLoadState(LoadState state, WaitForLoadStateOptions options) {
-    withWaitLogging("Page.waitForLoadState", logger -> {
-      mainFrame.waitForLoadStateImpl(state, convertType(options, Frame.WaitForLoadStateOptions.class), logger);
-      return null;
+  public void waitForLoadState(LoadState _state, WaitForLoadStateOptions options) {
+    final LoadState state = _state == null ? LoadState.LOAD : _state;
+    withTitle("Wait for load state \"" + state.toString().toLowerCase() + "\"", () -> {
+      withWaitLogging("Page.waitForLoadState", logger -> {
+        mainFrame.waitForLoadStateImpl(state, convertType(options, Frame.WaitForLoadStateOptions.class), logger);
+        return null;
+      });
     });
   }
 

playwright/src/test/java/com/microsoft/playwright/TestTracing.java

@@ -359,4 +359,24 @@ public void shouldNotRecordNetworkActions(@TempDir Path tempDir) throws Exceptio
       });
     });
   }
+
+  @Test
+  public void shouldShowWaitForLoadState(@TempDir Path tempDir) throws Exception {
+    // https://github.com/microsoft/playwright/issues/37297
+
+    context.tracing().start(new Tracing.StartOptions());
+
+    page.navigate(server.EMPTY_PAGE);
+    page.waitForLoadState();
+
+    Path traceFile1 = tempDir.resolve("trace1.zip");
+    context.tracing().stop(new Tracing.StopOptions().setPath(traceFile1));
+
+    TraceViewerPage.showTraceViewer(this.browserType, traceFile1, traceViewer -> {
+      assertThat(traceViewer.actionTitles()).hasText(new Pattern[] {
+        Pattern.compile("Navigate to \"/empty.html\""),
+        Pattern.compile("Wait for load state \"load\""),
+      });
+    });
+  }
 }