assert that json exists for all targets

Author: syphar

src/docbuilder/rustwide_builder.rs

@@ -1425,6 +1425,14 @@ mod tests {
 
                 // other targets too
                 for target in DEFAULT_TARGETS {
+                    // check if rustdoc json files exist for all targets
+                    assert!(storage.exists(&rustdoc_json_path(
+                        &crate_,
+                        &version,
+                        &target,
+                        RustdocJsonFormatVersion::Latest
+                    ))?);
+
                     if target == &default_target {
                         continue;
                     }