Add metadata-only PPI save automation

tests/CMakeLists.txt

@@ -283,6 +283,14 @@ if(TARGET pano_cli)
         LABELS "assets;document;integration;desktop-fast"
         PASS_REGULAR_EXPRESSION "\"command\":\"load-project\".*\"pixelDataLoaded\":false.*\"facePayloads\":0.*\"document\":\\{\"width\":64,\"height\":32,\"layers\":1,\"frames\":1,\"animationDurationMs\":100,\"layerNames\":\\[\"Ink\"\\],\"layerFrameCounts\":\\[1\\],\"layerDurationsMs\":\\[100\\]")
 
+    add_test(NAME pano_cli_save_project_roundtrip_smoke
+        COMMAND "${CMAKE_COMMAND}"
+            -DPANO_CLI=$<TARGET_FILE:pano_cli>
+            -DOUTPUT_PATH=${CMAKE_CURRENT_BINARY_DIR}/data/generated/roundtrip.ppi
+            -P "${CMAKE_CURRENT_SOURCE_DIR}/cmake/pano_cli_save_project_roundtrip.cmake")
+    set_tests_properties(pano_cli_save_project_roundtrip_smoke PROPERTIES
+        LABELS "assets;document;integration;desktop-fast")
+
     add_test(NAME pano_cli_parse_layout_smoke
         COMMAND pano_cli parse-layout --path "${CMAKE_CURRENT_SOURCE_DIR}/data/layouts/simple-layout.xml")
     set_tests_properties(pano_cli_parse_layout_smoke PROPERTIES

tests/assets/ppi_header_tests.cpp

@@ -9,6 +9,7 @@
 #include <vector>
 
 using pp::assets::parse_ppi_header;
+using pp::assets::create_minimal_ppi_project;
 using pp::assets::decode_ppi_project_images;
 using pp::assets::parse_ppi_project_index;
 using pp::assets::parse_ppi_project_summary;
@@ -384,6 +385,59 @@ void rejects_invalid_project_body_summaries(pp::tests::Harness& h)
     PP_EXPECT(h, bad_layer_name_result.status().code == StatusCode::out_of_range);
 }
 
+void creates_minimal_project_for_roundtrip_load(pp::tests::Harness& h)
+{
+    const auto project = create_minimal_ppi_project(pp::assets::PpiMinimalProjectConfig {
+        .width = 256,
+        .height = 128,
+        .layer_name = "Roundtrip",
+        .frame_duration_ms = 333,
+    });
+
+    PP_EXPECT(h, project.ok());
+    const auto index = parse_ppi_project_index(project.value());
+    PP_EXPECT(h, index.ok());
+    PP_EXPECT(h, index.value().layout.thumbnail_bytes == 128U * 128U * 4U);
+    PP_EXPECT(h, index.value().body.summary.width == 256U);
+    PP_EXPECT(h, index.value().body.summary.height == 128U);
+    PP_EXPECT(h, index.value().body.summary.layer_count == 1U);
+    PP_EXPECT(h, index.value().body.summary.declared_frame_count == 1U);
+    PP_EXPECT(h, index.value().body.summary.dirty_face_count == 0U);
+    PP_EXPECT(h, index.value().body.layers[0].name == "Roundtrip");
+    PP_EXPECT(h, index.value().body.layers[0].opacity == 1.0F);
+    PP_EXPECT(h, index.value().body.layers[0].visible);
+    PP_EXPECT(h, index.value().body.layers[0].frames[0].duration_ms == 333U);
+}
+
+void rejects_invalid_minimal_project_writer_inputs(pp::tests::Harness& h)
+{
+    const auto no_size = create_minimal_ppi_project(pp::assets::PpiMinimalProjectConfig {
+        .width = 0,
+        .height = 128,
+        .layer_name = "Ink",
+        .frame_duration_ms = 100,
+    });
+    const auto no_name = create_minimal_ppi_project(pp::assets::PpiMinimalProjectConfig {
+        .width = 128,
+        .height = 128,
+        .layer_name = "",
+        .frame_duration_ms = 100,
+    });
+    const auto no_duration = create_minimal_ppi_project(pp::assets::PpiMinimalProjectConfig {
+        .width = 128,
+        .height = 128,
+        .layer_name = "Ink",
+        .frame_duration_ms = 0,
+    });
+
+    PP_EXPECT(h, !no_size.ok());
+    PP_EXPECT(h, no_size.status().code == StatusCode::invalid_argument);
+    PP_EXPECT(h, !no_name.ok());
+    PP_EXPECT(h, no_name.status().code == StatusCode::invalid_argument);
+    PP_EXPECT(h, !no_duration.ok());
+    PP_EXPECT(h, no_duration.status().code == StatusCode::invalid_argument);
+}
+
 }
 
 int main()
@@ -401,5 +455,7 @@ int main()
     harness.run("rejects_metadata_only_payload_when_decoding_pixels", rejects_metadata_only_payload_when_decoding_pixels);
     harness.run("rejects_invalid_dirty_face_png_payloads", rejects_invalid_dirty_face_png_payloads);
     harness.run("rejects_invalid_project_body_summaries", rejects_invalid_project_body_summaries);
+    harness.run("creates_minimal_project_for_roundtrip_load", creates_minimal_project_for_roundtrip_load);
+    harness.run("rejects_invalid_minimal_project_writer_inputs", rejects_invalid_minimal_project_writer_inputs);
     return harness.finish();
 }

tests/cmake/pano_cli_save_project_roundtrip.cmake

@@ -0,0 +1,59 @@
+if(NOT DEFINED PANO_CLI)
+    message(FATAL_ERROR "PANO_CLI must be set")
+endif()
+
+if(NOT DEFINED OUTPUT_PATH)
+    message(FATAL_ERROR "OUTPUT_PATH must be set")
+endif()
+
+get_filename_component(output_dir "${OUTPUT_PATH}" DIRECTORY)
+file(MAKE_DIRECTORY "${output_dir}")
+file(REMOVE "${OUTPUT_PATH}")
+
+execute_process(
+    COMMAND "${PANO_CLI}" save-project
+        --path "${OUTPUT_PATH}"
+        --width 96
+        --height 48
+        --layer-name Roundtrip
+        --frame-duration-ms 321
+    RESULT_VARIABLE save_result
+    OUTPUT_VARIABLE save_output
+    ERROR_VARIABLE save_error)
+
+if(NOT save_result EQUAL 0)
+    message(FATAL_ERROR "save-project failed: ${save_output}${save_error}")
+endif()
+
+string(FIND "${save_output}" "\"command\":\"save-project\"" save_command_index)
+string(FIND "${save_output}" "\"bytes\":65655" save_bytes_index)
+if(save_command_index LESS 0 OR save_bytes_index LESS 0)
+    message(FATAL_ERROR "save-project output did not contain expected summary: ${save_output}")
+endif()
+
+if(NOT EXISTS "${OUTPUT_PATH}")
+    message(FATAL_ERROR "save-project did not create ${OUTPUT_PATH}")
+endif()
+
+execute_process(
+    COMMAND "${PANO_CLI}" load-project --path "${OUTPUT_PATH}"
+    RESULT_VARIABLE load_result
+    OUTPUT_VARIABLE load_output
+    ERROR_VARIABLE load_error)
+
+if(NOT load_result EQUAL 0)
+    message(FATAL_ERROR "load-project failed after save-project: ${load_output}${load_error}")
+endif()
+
+string(FIND "${load_output}" "\"command\":\"load-project\"" load_command_index)
+string(FIND "${load_output}" "\"width\":96" load_width_index)
+string(FIND "${load_output}" "\"height\":48" load_height_index)
+string(FIND "${load_output}" "\"animationDurationMs\":321" load_duration_index)
+string(FIND "${load_output}" "\"layerNames\":[\"Roundtrip\"]" load_layer_index)
+if(load_command_index LESS 0
+    OR load_width_index LESS 0
+    OR load_height_index LESS 0
+    OR load_duration_index LESS 0
+    OR load_layer_index LESS 0)
+    message(FATAL_ERROR "load-project output did not contain expected round-trip summary: ${load_output}")
+endif()