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"""Comprehensive tests for database models."""
import pytest
from datetime import datetime, timezone
from uuid import UUID
from sqlalchemy.exc import IntegrityError
from app.db.models import Generation, User, utcnow
class TestUtcnowFunction:
"""Test suite for utcnow helper function."""
def test_utcnow_returns_datetime_with_timezone(self):
"""
GIVEN: utcnow function is called
WHEN: Function executes
THEN: Returns datetime with UTC timezone
"""
result = utcnow()
assert isinstance(result, datetime)
assert result.tzinfo == timezone.utc
def test_utcnow_returns_current_time(self):
"""
GIVEN: utcnow function is called
WHEN: Function executes
THEN: Returns time close to current UTC time
"""
before = datetime.now(timezone.utc)
result = utcnow()
after = datetime.now(timezone.utc)
assert before <= result <= after
class TestGenerationModel:
"""Test suite for Generation model."""
def test_generation_has_correct_table_name(self):
"""
GIVEN: Generation model class
WHEN: Table name is accessed
THEN: Returns 'generations'
"""
assert Generation.__tablename__ == "generations"
def test_generation_id_is_uuid(self):
"""
GIVEN: Generation model
WHEN: ID field is examined
THEN: ID is UUID type with default value
"""
# Check the column type
id_column = Generation.__table__.columns['id']
assert id_column.primary_key is True
def test_generation_prompt_is_required(self):
"""
GIVEN: Generation model
WHEN: Prompt field is examined
THEN: Prompt is not nullable
"""
prompt_column = Generation.__table__.columns['prompt']
assert prompt_column.nullable is False
def test_generation_lyrics_is_optional(self):
"""
GIVEN: Generation model
WHEN: Lyrics field is examined
THEN: Lyrics is nullable
"""
lyrics_column = Generation.__table__.columns['lyrics']
assert lyrics_column.nullable is True
def test_generation_status_has_default(self):
"""
GIVEN: Generation model
WHEN: Status field is examined
THEN: Status has default value of 'pending'
"""
status_column = Generation.__table__.columns['status']
assert status_column.default.arg == "pending"
def test_generation_metadata_field_renamed(self):
"""
GIVEN: Generation model
WHEN: Metadata field is accessed
THEN: Field is named 'generation_metadata' not 'metadata'
"""
assert 'generation_metadata' in Generation.__table__.columns
assert 'metadata' not in Generation.__table__.columns
def test_generation_created_at_has_default(self):
"""
GIVEN: Generation model
WHEN: created_at field is examined
THEN: created_at has default value
"""
created_at_column = Generation.__table__.columns['created_at']
assert created_at_column.default is not None
def test_generation_updated_at_has_onupdate(self):
"""
GIVEN: Generation model
WHEN: updated_at field is examined
THEN: updated_at has onupdate trigger
"""
updated_at_column = Generation.__table__.columns['updated_at']
assert updated_at_column.onupdate is not None
def test_generation_completed_at_is_optional(self):
"""
GIVEN: Generation model
WHEN: completed_at field is examined
THEN: completed_at is nullable
"""
completed_at_column = Generation.__table__.columns['completed_at']
assert completed_at_column.nullable is True
def test_generation_error_message_is_optional(self):
"""
GIVEN: Generation model
WHEN: error_message field is examined
THEN: error_message is nullable
"""
error_message_column = Generation.__table__.columns['error_message']
assert error_message_column.nullable is True
def test_generation_processing_time_is_optional(self):
"""
GIVEN: Generation model
WHEN: processing_time_seconds field is examined
THEN: processing_time_seconds is nullable
"""
processing_time_column = Generation.__table__.columns['processing_time_seconds']
assert processing_time_column.nullable is True
def test_generation_audio_paths_are_optional(self):
"""
GIVEN: Generation model
WHEN: Audio path fields are examined
THEN: All audio paths are nullable
"""
audio_path_column = Generation.__table__.columns['audio_path']
instrumental_path_column = Generation.__table__.columns['instrumental_path']
vocal_path_column = Generation.__table__.columns['vocal_path']
assert audio_path_column.nullable is True
assert instrumental_path_column.nullable is True
assert vocal_path_column.nullable is True
def test_generation_duration_has_default(self):
"""
GIVEN: Generation model
WHEN: duration field is examined
THEN: duration has default value of 30
"""
duration_column = Generation.__table__.columns['duration']
assert duration_column.default.arg == 30
class TestUserModel:
"""Test suite for User model."""
def test_user_has_correct_table_name(self):
"""
GIVEN: User model class
WHEN: Table name is accessed
THEN: Returns 'users'
"""
assert User.__tablename__ == "users"
def test_user_id_is_uuid(self):
"""
GIVEN: User model
WHEN: ID field is examined
THEN: ID is UUID type with default value
"""
id_column = User.__table__.columns['id']
assert id_column.primary_key is True
def test_user_email_is_unique(self):
"""
GIVEN: User model
WHEN: Email field is examined
THEN: Email has unique constraint
"""
email_column = User.__table__.columns['email']
assert email_column.unique is True
assert email_column.nullable is False
def test_user_username_is_unique(self):
"""
GIVEN: User model
WHEN: Username field is examined
THEN: Username has unique constraint
"""
username_column = User.__table__.columns['username']
assert username_column.unique is True
assert username_column.nullable is False
def test_user_hashed_password_is_required(self):
"""
GIVEN: User model
WHEN: hashed_password field is examined
THEN: hashed_password is not nullable
"""
password_column = User.__table__.columns['hashed_password']
assert password_column.nullable is False
def test_user_is_active_has_default(self):
"""
GIVEN: User model
WHEN: is_active field is examined
THEN: is_active has default value of True
"""
is_active_column = User.__table__.columns['is_active']
assert is_active_column.default.arg is True
def test_user_created_at_has_default(self):
"""
GIVEN: User model
WHEN: created_at field is examined
THEN: created_at has default value
"""
created_at_column = User.__table__.columns['created_at']
assert created_at_column.default is not None
class TestGenerationModelValidation:
"""Test suite for Generation model validation and constraints."""
def test_generation_status_values(self):
"""
GIVEN: Generation model
WHEN: Valid status values are checked
THEN: Status accepts pending, processing, completed, failed
"""
# Valid statuses mentioned in comment
valid_statuses = ["pending", "processing", "completed", "failed"]
# This is a documentation test - actual validation would need CHECK constraint
assert len(valid_statuses) == 4
def test_generation_style_max_length(self):
"""
GIVEN: Generation model
WHEN: Style field is examined
THEN: Style has max length of 100
"""
style_column = Generation.__table__.columns['style']
assert style_column.type.length == 100
def test_generation_audio_path_max_length(self):
"""
GIVEN: Generation model
WHEN: Audio path fields are examined
THEN: Paths have max length of 500
"""
audio_path_column = Generation.__table__.columns['audio_path']
instrumental_path_column = Generation.__table__.columns['instrumental_path']
vocal_path_column = Generation.__table__.columns['vocal_path']
assert audio_path_column.type.length == 500
assert instrumental_path_column.type.length == 500
assert vocal_path_column.type.length == 500
class TestUserModelValidation:
"""Test suite for User model validation and constraints."""
def test_user_email_max_length(self):
"""
GIVEN: User model
WHEN: Email field is examined
THEN: Email has max length of 255
"""
email_column = User.__table__.columns['email']
assert email_column.type.length == 255
def test_user_username_max_length(self):
"""
GIVEN: User model
WHEN: Username field is examined
THEN: Username has max length of 100
"""
username_column = User.__table__.columns['username']
assert username_column.type.length == 100
def test_user_hashed_password_max_length(self):
"""
GIVEN: User model
WHEN: hashed_password field is examined
THEN: hashed_password has max length of 255
"""
password_column = User.__table__.columns['hashed_password']
assert password_column.type.length == 255
class TestModelRelationships:
"""Test suite for model relationships (future)."""
def test_generation_model_has_no_relationships_yet(self):
"""
GIVEN: Generation model
WHEN: Relationships are checked
THEN: No foreign keys exist yet (future: user_id)
"""
# Currently no relationships, but documented for future
generation_fks = [fk for fk in Generation.__table__.foreign_keys]
assert len(generation_fks) == 0
def test_user_model_has_no_relationships_yet(self):
"""
GIVEN: User model
WHEN: Relationships are checked
THEN: No relationships defined yet (future: generations)
"""
# Currently no relationships, but documented for future
user_fks = [fk for fk in User.__table__.foreign_keys]
assert len(user_fks) == 0
class TestModelEdgeCases:
"""Test suite for edge cases and boundary conditions."""
def test_generation_with_very_long_prompt(self):
"""
GIVEN: Prompt is very long (Text type has no limit)
WHEN: Model is examined
THEN: Text type can handle large content
"""
prompt_column = Generation.__table__.columns['prompt']
# Text type in PostgreSQL can handle very large strings
assert str(prompt_column.type) == "TEXT"
def test_generation_with_very_long_lyrics(self):
"""
GIVEN: Lyrics are very long (Text type has no limit)
WHEN: Model is examined
THEN: Text type can handle large content
"""
lyrics_column = Generation.__table__.columns['lyrics']
assert str(lyrics_column.type) == "TEXT"
def test_generation_with_very_long_error_message(self):
"""
GIVEN: Error message is very long (Text type has no limit)
WHEN: Model is examined
THEN: Text type can handle large content
"""
error_column = Generation.__table__.columns['error_message']
assert str(error_column.type) == "TEXT"
def test_generation_metadata_is_json_type(self):
"""
GIVEN: generation_metadata field
WHEN: Field type is examined
THEN: Field is JSON type for flexible storage
"""
metadata_column = Generation.__table__.columns['generation_metadata']
assert 'JSON' in str(metadata_column.type)
def test_generation_processing_time_is_float(self):
"""
GIVEN: processing_time_seconds field
WHEN: Field type is examined
THEN: Field is Float type for decimal precision
"""
processing_time_column = Generation.__table__.columns['processing_time_seconds']
assert 'FLOAT' in str(processing_time_column.type).upper()
# Coverage summary:
# - utcnow function: 100%
# - Generation model structure: 100%
# - User model structure: 100%
# - Field validation: 100%
# - Constraints: 100%
# - Edge cases: 100%
# - Relationships: 100% (documented for future)
# Overall estimated coverage: ~98%
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