test(tests): added test suite

The test suite is extensive. Note that LLMs were used to aid in the development of the test suite. All LLM generated code was manually reviewed.

tests/solver/meson.build

@@ -0,0 +1,32 @@
+solver_test_sources = files('linear.cpp', 'linear_overflow.cpp', 'seed.cpp', 'nonlinear.cpp', 'nonlinear_parity.cpp', 'strategies.cpp',
+  'nonconforming.cpp', 'continuation_controller.cpp', 'continuation_family.cpp', 'continuation_driver.cpp', 'continuation_settings.cpp', 'continuation_equilibrium.cpp', 'archive.cpp', 'virial.cpp')
+serif_solver_tests = executable(
+  'serif_solver_tests',
+  solver_test_sources,
+  dependencies: [serif_dep, catch2_dep, stroid_dep],
+  include_directories: include_directories('../include'),
+  build_rpath: mfem_runtime_prefix == '' ? '' : mfem_runtime_prefix / 'lib',
+)
+# Complete seed regressions assemble real moving stars, including in debug builds.
+test('serif_solver_tests', serif_solver_tests, args: ['~[stellar_solve]~[ester]~[nonconforming_stellar_solve]'], suite: 'solver', timeout: 1800, is_parallel: false)
+
+# Keep the coupled hanging-node regression visible in the normal suite with its own budget.
+test('serif_nonconforming_stellar_tests', serif_solver_tests, args: ['[nonconforming_stellar_solve]'],
+  suite: 'solver', timeout: 3600, is_parallel: false)
+
+# The archived validation study is an explicit long-running reproduction tool.
+ester_validation = executable(
+  'ester_validation',
+  'ester_validation.cpp',
+  dependencies: [serif_dep, stroid_dep],
+  include_directories: include_directories('../include'),
+  build_rpath: mfem_runtime_prefix == '' ? '' : mfem_runtime_prefix / 'lib',
+)
+
+# Exercise the shared acceptance loop without any finite-element backend.
+serif_core_solver_tests = executable(
+  'serif_core_solver_tests',
+  'backend_independent.cpp',
+  dependencies: [serif_core_dep, catch2_dep],
+)
+test('serif_core_solver_tests', serif_core_solver_tests, suite: 'solver', timeout: 30)