Deprecate validate-borgmatic-config in favor of new "config validate" action (#529).

tests/integration/actions/config/test_validate.py

@@ -0,0 +1,37 @@
+import argparse
+
+from flexmock import flexmock
+
+import borgmatic.logger
+from borgmatic.actions.config import validate as module
+
+
+def test_run_validate_with_show_renders_configurations():
+    log_lines = []
+    borgmatic.logger.add_custom_log_levels()
+
+    def fake_logger_answer(message):
+        log_lines.append(message)
+
+    flexmock(module.logger).should_receive('answer').replace_with(fake_logger_answer)
+
+    module.run_validate(argparse.Namespace(show=True), {'test.yaml': {'foo': {'bar': 'baz'}}})
+
+    assert log_lines == ['''foo:\n    bar: baz\n''']
+
+
+def test_run_validate_with_show_and_multiple_configs_renders_each():
+    log_lines = []
+    borgmatic.logger.add_custom_log_levels()
+
+    def fake_logger_answer(message):
+        log_lines.append(message)
+
+    flexmock(module.logger).should_receive('answer').replace_with(fake_logger_answer)
+
+    module.run_validate(
+        argparse.Namespace(show=True),
+        {'test.yaml': {'foo': {'bar': 'baz'}}, 'other.yaml': {'quux': 'value'}},
+    )
+
+    assert log_lines == ['---', 'foo:\n    bar: baz\n', '---', 'quux: value\n']