[exec] tests: add end-to-end tests

libs/garf_executors/tests/end-to-end/test.json

@@ -0,0 +1,46 @@
+[
+  {
+    "resource": "Campaign A",
+    "dimensions": {
+      "name": "Ad Group 1",
+      "id": 101
+    },
+    "metrics": {
+      "clicks": 1500,
+      "cost": 250.75
+    }
+  },
+  {
+    "resource": "Campaign B",
+    "dimensions": {
+      "name": "Ad Group 2",
+      "id": 102
+    },
+    "metrics": {
+      "clicks": 2300,
+      "cost": 410.20
+    }
+  },
+  {
+    "resource": "Campaign C",
+    "dimensions": {
+      "name": "Ad Group 3",
+      "id": 103
+    },
+    "metrics": {
+      "clicks": 800,
+      "cost": 120.50
+    }
+  },
+  {
+    "resource": "Campaign A",
+    "dimensions": {
+      "name": "Ad Group 4",
+      "id": 104
+    },
+    "metrics": {
+      "clicks": 3200,
+      "cost": 600.00
+    }
+  }
+]

libs/garf_executors/tests/end-to-end/test_cli.py

@@ -0,0 +1,69 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# pylint: disable=C0330, g-bad-import-order, g-multiple-import, missing-class-docstring, missing-module-docstring, missing-function-docstring
+
+import json
+import pathlib
+import subprocess
+
+_SCRIPT_PATH = pathlib.Path(__file__).parent
+
+
+class TestApiQueryExecutor:
+  def test_fake_source(self):
+    fake_data = _SCRIPT_PATH / 'test.json'
+    query = (
+      'SELECT resource, dimensions.name AS name, metrics.clicks AS clicks '
+      'FROM resource'
+    )
+    command = (
+      f'garf "{query}" --input console --source fake '
+      f'--source.data_location={fake_data} '
+      '--output console --console.format=json '
+      '--loglevel ERROR'
+    )
+    result = subprocess.run(
+      command,
+      shell=True,
+      check=False,
+      capture_output=True,
+      text=True,
+    )
+
+    expected_output = [
+      {
+        'resource': 'Campaign A',
+        'name': 'Ad Group 1',
+        'clicks': 1500,
+      },
+      {
+        'resource': 'Campaign B',
+        'name': 'Ad Group 2',
+        'clicks': 2300,
+      },
+      {
+        'resource': 'Campaign C',
+        'name': 'Ad Group 3',
+        'clicks': 800,
+      },
+      {
+        'resource': 'Campaign A',
+        'name': 'Ad Group 4',
+        'clicks': 3200,
+      },
+    ]
+
+    assert result.returncode == 0
+    assert json.loads(result.stdout) == expected_output