146 lines
4.6 KiB
Python
146 lines
4.6 KiB
Python
"""Tests for Dagster ops — elementary and source freshness."""
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import subprocess
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from unittest.mock import patch
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import pytest
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from dagster import build_op_context
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from data_platform.ops.check_source_freshness import (
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SourceFreshnessConfig,
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)
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from data_platform.ops.elementary import (
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_elementary_schema_exists,
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elementary_generate_report,
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elementary_run_models,
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)
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# SourceFreshnessConfig
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class TestSourceFreshnessConfig:
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def test_accepts_source_name(self):
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cfg = SourceFreshnessConfig(source_name="raw_funda")
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assert cfg.source_name == "raw_funda"
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# _elementary_schema_exists
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class TestElementarySchemaExists:
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@patch("data_platform.resources._retry_on_operational_error")
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@patch("data_platform.ops.elementary.create_engine")
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def test_returns_true_when_schema_present(self, mock_create_engine, mock_retry):
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mock_retry.return_value = True
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with patch.dict(
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"os.environ",
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{
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"POSTGRES_USER": "u",
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"POSTGRES_PASSWORD": "p",
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"POSTGRES_HOST": "localhost",
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"POSTGRES_PORT": "5432",
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"POSTGRES_DB": "db",
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},
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):
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result = _elementary_schema_exists()
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assert result is True
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mock_create_engine.assert_called_once()
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@patch("data_platform.resources._retry_on_operational_error")
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@patch("data_platform.ops.elementary.create_engine")
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def test_returns_false_when_schema_absent(self, mock_create_engine, mock_retry):
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mock_retry.return_value = False
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with patch.dict(
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"os.environ",
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{
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"POSTGRES_USER": "u",
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"POSTGRES_PASSWORD": "p",
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"POSTGRES_HOST": "localhost",
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"POSTGRES_PORT": "5432",
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"POSTGRES_DB": "db",
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},
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):
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result = _elementary_schema_exists()
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assert result is False
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# elementary_run_models
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class TestElementaryRunModels:
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@patch("data_platform.ops.elementary._elementary_schema_exists", return_value=True)
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def test_skips_when_schema_exists(self, mock_exists):
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context = build_op_context()
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elementary_run_models(context)
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mock_exists.assert_called_once()
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@patch(
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"data_platform.ops.elementary.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=0, stdout="ok", stderr=""
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),
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)
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@patch("data_platform.ops.elementary._elementary_schema_exists", return_value=False)
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def test_runs_dbt_when_schema_missing(self, mock_exists, mock_run):
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context = build_op_context()
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elementary_run_models(context)
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mock_run.assert_called_once()
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args = mock_run.call_args[0][0]
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assert "dbt" in args
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assert "run" in args
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assert "elementary" in args
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@patch(
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"data_platform.ops.elementary.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=1, stdout="", stderr="error"
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),
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)
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@patch("data_platform.ops.elementary._elementary_schema_exists", return_value=False)
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def test_raises_on_dbt_failure(self, mock_exists, mock_run):
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context = build_op_context()
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with pytest.raises(Exception, match="dbt run elementary failed"):
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elementary_run_models(context)
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# elementary_generate_report
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class TestElementaryGenerateReport:
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@patch(
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"data_platform.ops.elementary.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=0, stdout="report generated", stderr=""
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),
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)
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def test_calls_edr_report(self, mock_run):
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context = build_op_context()
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elementary_generate_report(context)
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mock_run.assert_called_once()
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args = mock_run.call_args[0][0]
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assert "edr" in args
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assert "report" in args
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@patch(
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"data_platform.ops.elementary.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=1, stdout="", stderr="fatal error"
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),
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)
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def test_raises_on_failure(self, mock_run):
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context = build_op_context()
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with pytest.raises(Exception, match="edr report failed"):
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elementary_generate_report(context)
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@patch(
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"data_platform.ops.elementary.subprocess.run",
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return_value=subprocess.CompletedProcess(
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args=[], returncode=0, stdout="done", stderr=""
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),
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)
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def test_success_returns_none(self, mock_run):
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context = build_op_context()
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result = elementary_generate_report(context)
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assert result is None
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