Route canvas camera reset through app core

tests/app_core/canvas_view_tests.cpp

@@ -0,0 +1,32 @@
+#include "app_core/canvas_view.h"
+#include "test_harness.h"
+
+#include <cstddef>
+
+namespace {
+
+void camera_reset_projects_legacy_defaults(pp::tests::Harness& harness)
+{
+    const auto state = pp::app::plan_canvas_camera_reset();
+
+    for (std::size_t index = 0; index < state.rotation.size(); ++index) {
+        const bool diagonal = index == 0 || index == 5 || index == 10 || index == 15;
+        PP_EXPECT(harness, state.rotation[index] == (diagonal ? 1.0F : 0.0F));
+    }
+
+    PP_EXPECT(harness, state.position[0] == 0.0F);
+    PP_EXPECT(harness, state.position[1] == 0.0F);
+    PP_EXPECT(harness, state.position[2] == 0.0F);
+    PP_EXPECT(harness, state.field_of_view_degrees == 85.0F);
+    PP_EXPECT(harness, state.pan[0] == 0.0F);
+    PP_EXPECT(harness, state.pan[1] == 0.0F);
+}
+
+} // namespace
+
+int main()
+{
+    pp::tests::Harness harness;
+    harness.run("camera reset projects legacy defaults", camera_reset_projects_legacy_defaults);
+    return harness.finish();
+}