[Alexandre-T]

Refs #11. MultiPoint EMPTY-member rejection was implemented in #18, but spatial-types alpha.1 prevented constructing the real inputs needed to verify AC4/AC5. Requiring the approved 0.0.1-alpha.2 release enables eight explicit tests covering Geometry and Geography, XY and XYZ, mixed non-empty/EMPTY members and aggregates containing only EMPTY points.

Each test constructs real Point and MultiPoint objects before expecting UnsupportedGeometryStructureException from Writer. No fixtures bypass model invariants, and no runtime writer code changes are needed. Existing empty-aggregate tests continue to verify that zero members remain accepted. English strategy documentation and the test guide now describe the supported model and rejection behavior.

Validation with the declared alpha.2 dependency, using standard autoloading:

• vendor/bin/phpunit --no-coverage --filter GeoJson: 112 tests, 438 assertions passed.
• composer test: 832 tests, 1210 assertions passed.
• composer quality: passed; existing PHPMD/PDepend deprecation notices remain. PHP CS Fixer required execution outside the sandbox for its local worker socket.
• git diff --check: passed.

The serialization rule follows the already approved #11 contract for RFC 7946 MultiPoint geometries. No new normative interpretation or architecture decision is introduced. The exact dependency requirement changes from 0.0.1-alpha.1 to 0.0.1-alpha.2, explicitly approved by Alexandre; consumers must resolve alpha.2. Writer public APIs and serialization behavior remain unchanged, with no additional breaking change. vendor/ and the ignored composer.lock are not committed.

No reviewer was launched or requested, per Alexandre's instruction. Independent review and merge remain outstanding; story #11 is not marked Done.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (96742f9) to head (7b4a0eb).

Additional details and impacted files

@@              Coverage Diff              @@
##               main       #20      +/-   ##
=============================================
+ Coverage     99.65%   100.00%   +0.34%     
  Complexity      156       156              
=============================================
  Files            14        14              
  Lines           287       287              
=============================================
+ Hits            286       287       +1     
+ Misses            1         0       -1     

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