Offer a way to query the mode of a SchemaFrame (#1626)

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

src/core/jsonschema/include/sourcemeta/core/jsonschema_frame.h

@@ -110,6 +110,9 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaFrame {
 
   SchemaFrame(const Mode mode) : mode_{mode} {}
 
+  // Query the current mode that the schema frame was configured with
+  auto mode() const noexcept -> Mode { return this->mode_; }
+
   /// A single entry in a JSON Schema reference map
   struct ReferencesEntry {
     std::string destination;

test/jsonschema/jsonschema_frame_test.cc

@@ -697,6 +697,8 @@ TEST(JSONSchema_frame, mode_references) {
   frame.analyse(document, sourcemeta::core::schema_official_walker,
                 sourcemeta::core::schema_official_resolver);
 
+  EXPECT_EQ(frame.mode(), sourcemeta::core::SchemaFrame::Mode::References);
+
   EXPECT_EQ(frame.locations().size(), 9);
   EXPECT_FRAME_STATIC_RESOURCE(frame, "https://www.example.com",
                                "https://www.example.com", "",
@@ -781,6 +783,7 @@ TEST(JSONSchema_frame, mode_locations) {
   frame.analyse(document, sourcemeta::core::schema_official_walker,
                 sourcemeta::core::schema_official_resolver);
 
+  EXPECT_EQ(frame.mode(), sourcemeta::core::SchemaFrame::Mode::Locations);
   EXPECT_EQ(frame.locations().size(), 9);
   EXPECT_FRAME_STATIC_RESOURCE(frame, "https://www.example.com",
                                "https://www.example.com", "",