Revise to get all engine adapters; adapt parallel integration tests t…

…o support this

sqlmesh/core/context.py

@@ -418,12 +418,10 @@ def engine_adapter(self) -> EngineAdapter:
     @property
     def snapshot_evaluator(self) -> SnapshotEvaluator:
         if not self._snapshot_evaluator:
-            if snapshot_gateways := self._snapshot_gateways:
-                self._create_engine_adapters(set(snapshot_gateways.values()))
             self._snapshot_evaluator = SnapshotEvaluator(
                 {
                     gateway: adapter.with_log_level(logging.INFO)
-                    for gateway, adapter in self._engine_adapters.items()
+                    for gateway, adapter in self.engine_adapters.items()
                 },
                 ddl_concurrent_tasks=self.concurrent_tasks,
                 selected_gateway=self.selected_gateway,
@@ -2025,21 +2023,13 @@ def _snapshot_gateways(self) -> t.Dict[str, str]:
 
     @cached_property
     def engine_adapters(self) -> t.Dict[str, EngineAdapter]:
-        """Returns all engine adapters for the gateways defined in the configs."""
-        self._create_engine_adapters()
-        return self._engine_adapters
-
-    def _create_engine_adapters(self, gateways: t.Optional[t.Set] = None) -> None:
-        """Create engine adapters for the gateways, when none provided include all defined in the configs."""
-
+        """Returns all the engine adapters for the gateways defined in the configuration."""
         for gateway_name in self.config.gateways:
-            if gateway_name != self.selected_gateway and (
-                gateways is None or gateway_name in gateways
-            ):
+            if gateway_name != self.selected_gateway:
                 connection = self.config.get_connection(gateway_name)
                 adapter = connection.create_engine_adapter()
-                self.concurrent_tasks = min(self.concurrent_tasks, connection.concurrent_tasks)
                 self._engine_adapters[gateway_name] = adapter
+        return self._engine_adapters
 
     def _get_engine_adapter(self, gateway: t.Optional[str] = None) -> EngineAdapter:
         if gateway:

tests/core/engine_adapter/integration/__init__.py

@@ -470,6 +470,7 @@ def create_context(
             ],
         )
         if config_mutator:
+            config.gateways = {self.gateway: config.gateways[self.gateway]}
             config_mutator(self.gateway, config)
 
         gateway_config = config.gateways[self.gateway]

tests/core/engine_adapter/integration/test_integration.py

@@ -1328,6 +1328,8 @@ def test_sushi(ctx: TestContext, tmp_path_factory: pytest.TempPathFactory):
         personal_paths=[pathlib.Path("~/.sqlmesh/config.yaml").expanduser()],
     )
 
+    # To enable parallelism in integration tests
+    config.gateways = {ctx.gateway: config.gateways[ctx.gateway]}
     current_gateway_config = config.gateways[ctx.gateway]
     current_gateway_config.state_schema = sushi_state_schema
 
@@ -1731,6 +1733,8 @@ def _normalize_snowflake(name: str, prefix_regex: str = "(sqlmesh__)(.*)"):
     if config.model_defaults.dialect != ctx.dialect:
         config.model_defaults = config.model_defaults.copy(update={"dialect": ctx.dialect})
 
+    # To enable parallelism in integration tests
+    config.gateways = {ctx.gateway: config.gateways[ctx.gateway]}
     current_gateway_config = config.gateways[ctx.gateway]
 
     if ctx.dialect == "athena":

tests/core/test_config.py

@@ -757,10 +757,8 @@ def test_multi_gateway_config(tmp_path, mocker: MockerFixture):
         new_callable=mocker.PropertyMock(return_value={"snapshot": "athena"}),
     )
 
-    ctx._create_engine_adapters()
-
     assert isinstance(ctx._connection_config, RedshiftConnectionConfig)
-    assert len(ctx._engine_adapters) == 2
-    assert isinstance(ctx._engine_adapters["athena"], AthenaEngineAdapter)
-    assert isinstance(ctx._engine_adapters["redshift"], RedshiftEngineAdapter)
+    assert len(ctx.engine_adapters) == 2
+    assert isinstance(ctx.engine_adapters["athena"], AthenaEngineAdapter)
+    assert isinstance(ctx.engine_adapters["redshift"], RedshiftEngineAdapter)
     assert ctx.engine_adapter == ctx._get_engine_adapter("redshift")

tests/core/test_context.py

@@ -341,8 +341,7 @@ def test_gateway_specific_adapters(copy_to_temp_path, mocker):
 
     ctx = Context(paths=path, config="isolated_systems_config")
 
-    ctx._create_engine_adapters({"test"})
-    assert len(ctx._engine_adapters) == 2
+    assert len(ctx.engine_adapters) == 3
     assert ctx.engine_adapter == ctx._get_engine_adapter()
     assert ctx._get_engine_adapter("test") == ctx._engine_adapters["test"]
 

tests/core/test_model.py

@@ -6635,7 +6635,6 @@ def test_gateway_specific_render(assert_exp_eq) -> None:
     )
     context = Context(config=config)
     assert context.engine_adapter == context._engine_adapters["main"]
-    assert len(context._engine_adapters) == 1
 
     @model(
         name="dummy_model",
@@ -6652,8 +6651,6 @@ def dummy_model_entry(evaluator: MacroEvaluator) -> exp.Select:
     assert isinstance(dummy_model, SqlModel)
     assert dummy_model.gateway == "duckdb"
 
-    # Calling render with a model with a non-default gateway should create
-    # the engine adapters and render with the model specified gateway
     assert_exp_eq(
         context.render("dummy_model"),
         """

tests/core/test_test.py

@@ -2021,7 +2021,6 @@ def test_test_with_gateway_specific_model(tmp_path: Path, mocker: MockerFixture)
     )
 
     assert context.engine_adapter == context._engine_adapters["main"]
-    assert len(context._engine_adapters) == 1
     with pytest.raises(
         SQLMeshError, match=r"Gateway 'wrong' not found in the available engine adapters."
     ):