Add more cli tests

tests/test_cli.py

@@ -1,10 +1,11 @@
 import io
-from lkml.tree import ContainerNode, DocumentNode, PairNode, SyntaxToken
-from pathlib import Path
-from unittest.mock import patch
 import logging
 import pytest
 import lkml
+import json
+
+from pathlib import Path
+from unittest.mock import patch
 
 
 @pytest.fixture
@@ -25,13 +26,18 @@ def test_absence_of_debug_flag_is_parsed_to_log_level_warn(lookml_path):
     assert args.log_level == logging.WARN
 
 
-def test_default_option(lookml_path):
+def test_load_with_bad_argument_raises_type_error():
+    with pytest.raises(TypeError):
+        lkml.load(stream=100)
+
+
+def test_parse_default_option(lookml_path):
     args = lkml.parse_args([lookml_path])
     assert args.json is True
     assert args.lookml is args.write is False
 
 
-def test_options(lookml_path):
+def test_parse_options(lookml_path):
     args = lkml.parse_args([lookml_path, "--json"])
     assert args.json is True
     args = lkml.parse_args([lookml_path, "--lookml"])
@@ -44,15 +50,23 @@ def test_options(lookml_path):
         args = lkml.parse_args([lookml_path, "--json", "--lookml"])
 
 
-@patch("lkml.load")
-@patch("lkml.parse_args")
-def test_run_cli(mock_parse_args, mock_load, lookml_path):
-    mock_parse_args.return_value.file = io.StringIO()
-    mock_parse_args.return_value.log_level = logging.WARN
-    mock_load.return_value = {"a": "1"}
-    lkml.cli()
+def test_run_cli_default_option(lookml_path, capsys):
+    with patch("sys.argv", ["file.py", lookml_path]):
+        lkml.cli()
+        captured = capsys.readouterr()
+        assert json.loads(captured.out) is not None
+        assert captured.err == ""
 
 
-def test_load_with_bad_argument_raises_type_error():
-    with pytest.raises(TypeError):
-        lkml.load(stream=100)
+def test_run_cli_options(lookml_path, capsys):
+    with patch("sys.argv", ["file.py", "--json", lookml_path]):
+        lkml.cli()
+        captured = capsys.readouterr()
+        assert json.loads(captured.out) is not None
+        assert captured.err == ""
+
+    with patch("sys.argv", ["file.py", "--lookml", lookml_path]):
+        lkml.cli()
+        captured = capsys.readouterr()
+        assert lkml.load(captured.out) is not None
+        assert captured.err == ""