187946a7ae
A configured or default database that does not exist raises SourceUnavailableError with the way to create it and without its location. An unknown --db-name lists the databases there are, configured or default. The CHANGELOG records Store.db_path, SingleDatabaseSession(ref, config), the empty lancedb.uri migration and the error-type change.
229 lines
9.1 KiB
Python
229 lines
9.1 KiB
Python
from pathlib import Path
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import pytest
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from haiku.rag.client.scope import DatabaseRef, DatabaseScope, database_name
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from haiku.rag.config.models import AppConfig, LanceDBConfig, StorageConfig
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from haiku.rag.store.exceptions import (
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AmbiguousDatabaseError,
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UnknownDatabaseError,
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)
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def _config(**kwargs) -> AppConfig:
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return AppConfig(lancedb=LanceDBConfig(**kwargs))
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class TestResolution:
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"""One selector at most, and the same answer wherever it is asked."""
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def test_a_name_and_a_path_together_are_refused(self):
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config = _config(databases={"alpha": "/data/alpha.lancedb"})
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with pytest.raises(AmbiguousDatabaseError, match="pass one of them"):
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DatabaseScope.resolve(
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config, database_name="alpha", database_path=Path("/data/other.lancedb")
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)
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def test_a_path_places_the_database_where_the_configuration_places_none(self):
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scope = DatabaseScope.resolve(_config(), database_path="/data/other.lancedb")
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assert scope.databases == (DatabaseRef.at("/data/other.lancedb"),)
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assert scope.names == ("other",)
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assert not scope.covers_multiple
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def test_a_path_beside_a_configured_placement_is_refused(self):
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"""The configuration places databases; a path beside it is a second
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placement, and the refusal names both."""
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config = _config(databases={"alpha": "/data/alpha.lancedb", "beta": "b://b"})
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with pytest.raises(AmbiguousDatabaseError) as raised:
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DatabaseScope.resolve(config, database_path=Path("/data/other.lancedb"))
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message = str(raised.value)
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assert "/data/other.lancedb" in message
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assert "alpha" in message and "beta" in message
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assert "lancedb.databases" in message
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def test_a_named_database_keeps_its_name(self):
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config = _config(databases={"alpha": "/data/alpha.lancedb", "beta": "b://b"})
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scope = DatabaseScope.resolve(config, database_name="beta")
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assert scope.databases == (DatabaseRef("beta", "b://b"),)
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assert scope.names == ("beta",)
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def test_an_unknown_name_is_refused(self):
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"""The message lists the databases there are, configured or default."""
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config = _config(databases={"alpha": "/data/alpha.lancedb"})
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with pytest.raises(
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UnknownDatabaseError,
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match="unknown database 'nope'.*the databases are alpha",
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):
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DatabaseScope.resolve(config, database_name="nope")
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with pytest.raises(
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UnknownDatabaseError,
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match="unknown database 'nope'.*the databases are haiku.rag",
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):
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DatabaseScope.resolve(_config(), database_name="nope")
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def test_no_selector_covers_the_configured_set_in_order(self):
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config = _config(
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databases={"beta": "/data/b.lancedb", "alpha": "/data/a.lancedb"}
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)
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scope = DatabaseScope.resolve(config)
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assert scope.names == ("beta", "alpha")
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assert scope.covers_multiple
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def test_a_configured_set_of_one_is_still_a_named_database(self):
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"""Its name is what results and citations carry, so it survives."""
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config = _config(databases={"alpha": "/data/alpha.lancedb"})
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scope = DatabaseScope.resolve(config)
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assert scope.databases == (DatabaseRef("alpha", Path("/data/alpha.lancedb")),)
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assert not scope.covers_multiple
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def test_nothing_configured_is_the_default_entry(self, tmp_path):
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"""No `databases` reads as one entry, `haiku.rag`, under the data
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directory: an ordinary configured database in every respect."""
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config = AppConfig(storage=StorageConfig(data_dir=tmp_path))
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scope = DatabaseScope.resolve(config)
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assert scope.databases == (
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DatabaseRef("haiku.rag", tmp_path / "haiku.rag.lancedb"),
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)
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assert scope.names == ("haiku.rag",)
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def test_the_default_entry_is_selectable_by_name(self, tmp_path):
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config = AppConfig(storage=StorageConfig(data_dir=tmp_path))
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by_name = DatabaseScope.resolve(config, database_name="haiku.rag")
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selected = DatabaseScope.resolve(config).select(["haiku.rag"])
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assert by_name == selected == DatabaseScope.resolve(config)
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def test_the_default_entry_does_not_hide_a_configured_set(self, tmp_path):
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"""The default stands in only where nothing is configured."""
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config = AppConfig(
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storage=StorageConfig(data_dir=tmp_path),
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lancedb=LanceDBConfig(databases={"alpha": "/data/alpha.lancedb"}),
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)
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with pytest.raises(UnknownDatabaseError, match="haiku.rag"):
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DatabaseScope.resolve(config, database_name="haiku.rag")
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def test_the_environment_is_not_consulted(self, monkeypatch):
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"""Resolution reads the configuration alone."""
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monkeypatch.setenv("HAIKU_RAG_DB", "/data/from-the-environment.lancedb")
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config = _config(databases={"alpha": "/data/alpha.lancedb"})
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scope = DatabaseScope.resolve(config)
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assert scope.names == ("alpha",)
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def test_a_path_is_never_reinterpreted_as_a_uri(self):
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"""A caller naming a path means that path, whatever scheme it carries."""
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scope = DatabaseScope.resolve(
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_config(), database_path="s3://bucket/looks-like-a-uri.lancedb"
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)
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[ref] = scope.databases
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assert ref.location == Path("s3://bucket/looks-like-a-uri.lancedb")
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def test_a_configured_location_with_a_scheme_is_a_uri(self):
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"""A configured value is a URI or a path depending on its scheme, which is
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what makes it different from a path the caller gave."""
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config = _config(databases={"alpha": "s3://bucket/alpha.lancedb"})
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[ref] = DatabaseScope.resolve(config).databases
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assert ref.location == "s3://bucket/alpha.lancedb"
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assert ref.db_path is None
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def test_a_configured_location_without_a_scheme_is_a_path(self):
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config = _config(databases={"alpha": "/data/alpha.lancedb"})
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[ref] = DatabaseScope.resolve(config).databases
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assert ref.location == Path("/data/alpha.lancedb")
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assert ref.db_path == Path("/data/alpha.lancedb")
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def test_a_scope_covers_at_least_one_database(self):
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"""Every resolution reaches a database, and the sessions built from a
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scope have no meaning without one."""
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with pytest.raises(ValueError, match="at least one database"):
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DatabaseScope(())
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class TestTheReference:
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"""Constructed directly, a reference still holds what it advertises."""
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def test_a_schemeless_string_location_is_a_path(self):
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ref = DatabaseRef("x", "local.lancedb")
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assert ref.location == Path("local.lancedb")
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assert ref.db_path == Path("local.lancedb")
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def test_a_location_with_a_scheme_stays_a_uri(self):
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ref = DatabaseRef("x", "s3://bucket/x.lancedb")
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assert ref.location == "s3://bucket/x.lancedb"
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assert ref.db_path is None
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def test_a_blank_name_is_refused(self):
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with pytest.raises(ValueError, match="no name"):
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DatabaseRef("", "/data/x.lancedb")
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with pytest.raises(ValueError, match="no name"):
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DatabaseRef(" ", "s3://bucket/x.lancedb")
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def test_a_blank_location_is_refused(self):
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"""A blank string would resolve to the working directory."""
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with pytest.raises(ValueError, match="no location"):
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DatabaseRef("x", "")
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with pytest.raises(ValueError, match="no location"):
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DatabaseRef("x", " ")
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def test_a_given_database_is_a_local_path(self):
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"""Only a path can be given: a given database's errors name its
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location, and a URI must never travel that way."""
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assert DatabaseRef("x", "local.lancedb", given=True).location == Path(
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"local.lancedb"
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)
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with pytest.raises(ValueError, match="is a URI"):
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DatabaseRef("x", "s3://bucket/x.lancedb", given=True)
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class TestNamingAPath:
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"""A path the caller gave is named by its stem, the one rule for the
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default database and for `--db`."""
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def test_the_stem_names_the_database(self):
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assert database_name(Path("/data/foo.lancedb")) == "foo"
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assert database_name(Path("relative.lancedb")) == "relative"
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assert database_name(Path("/data/haiku.rag.lancedb")) == "haiku.rag"
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def test_a_path_with_no_stem_is_refused(self):
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with pytest.raises(ValueError, match="no name"):
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database_name(Path("/"))
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def test_at_names_the_path_it_is_given(self):
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"""A given path is marked as such: its errors may name it, since the
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caller already knows where it is."""
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assert DatabaseRef.at("/data/other.lancedb") == DatabaseRef(
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"other", Path("/data/other.lancedb"), given=True
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)
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assert not DatabaseRef.configured("other", "/data/other.lancedb").given
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def test_a_scope_at_a_path_ignores_the_configuration(self):
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"""The CLI's `--db` is a human's explicit override: it constructs the
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scope directly and consults no configuration."""
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scope = DatabaseScope.at(Path("/data/other.lancedb"))
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assert scope.databases == (DatabaseRef.at("/data/other.lancedb"),)
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assert scope.names == ("other",)
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