message_ix_models.tests.model.test_bmt

Tests for the BMT workflow (Buildings, Materials, Transport).

Covers message_ix_models.model.bmt.workflow and linked sector builds:

• After M reported, message_ix_models.model.transport.workflow.add_steps() uses the transport scenario code from BMT config (context.transport.code) to add MESSAGEix-Transport steps, including <transport code> T built with message_ix_models.model.transport.build.main(); MT built then clones that branch and calls message_ix_models.model.bmt.workflow._set_as_default`().

• BMT built: message_ix_models.model.buildings.build.main().

• BMTX built: message_ix_models.model.bmt.utils.build_PM().

Coverage notes: - prepare_data_B and build_B: tested with and without materials

(with_materials=False and with_materials=True in test_prepare_data_B_*, test_build_B_runs_with_minimal_data, test_build_B_runs_with_materials).

• utils: build_PM (test_build_PM_*), _generate_vetting_csv (test_generate_vetting_csv*).

• CLI: bmt group and run subcommand (test_bmt_cli_help, test_bmt_run_dry_run).

• Common workflow step functions: _set_as_default, prep_for_macro, add_macro.

Functions

bmt_context(test_context, tmp_path)	BMT context (R12) and buildings config with paths to minimal CSVs.
bmt_context_with_materials(bmt_context)	Like bmt_context but with with_materials=True for build_B materials path.
test_add_macro(capfd, monkeypatch, request, ...)	add_macro() uses the configured file and solves with MESSAGE-MACRO.
test_bmt_cli_help(mix_models_cli)	bmt and bmt run show --help.
test_bmt_run_dry_run(mix_models_cli)	bmt run --dry-run TARGET runs workflow in dry-run (writes SVG, no execution).
test_bmt_workflow_has_bmtx_built_step(...)	The BMT workflow includes the 'BMTX built' step that calls build_PM.
test_bmt_workflow_has_mt_and_bmt_built_steps(...)	The BMT workflow includes MT built and BMT built steps.
test_build_PM_callable(test_context, request)	build_PM(context, scenario) runs; skip if scenario lacks inv_cost.
test_build_PM_returns_scenario(test_context, ...)	build_PM returns the scenario when power-sector material data already exists.
test_generate_vetting_csv(tmp_path)	generate_vetting_csv writes CSV of original/modified demand and subtraction.
test_generate_vetting_csv_zero_original(tmp_path)	generate_vetting_csv handles zeros in original_demand.
test_prep_for_macro(test_context, request, ...)	prep_for_macro removes macro sectors and calls solve.
test_set_as_default(test_context, request)	_set_as_default sets the scenario as default and returns it.