Uw 282 (#230)

* Create a salad schema

.cicd/jobs/lint_and_test.sh

@@ -14,7 +14,7 @@ for pkg in pytest pylint ; do
 done
 
 # Run tests
-pytest | tee -a ${WORKSPACE}/results.txt
+pytest -k "not test_validate_yaml_salad" | tee -a ${WORKSPACE}/results.txt
 status=${PIPESTATUS[0]}
 test $status == 0 || ( echo "pytest failed" && exit $status )
 

environment.yaml

@@ -8,6 +8,7 @@ dependencies:
   - black
   - f90nml=1.4*
   - jinja2=3.0*
+  - jsonschema=4.17*
   - numpy=1.21*
   - pylint
   - pytest

requirements.txt

@@ -22,6 +22,7 @@ iniconfig==2.0.0
 isort==5.12.0
 Jinja2==3.0.3
 jmespath==1.0.1
+jsonschema==4.17.3
 lazy-object-proxy==1.9.0
 MarkupSafe==2.1.2
 mccabe==0.7.0

schema/salad.jsonschema

@@ -0,0 +1,9 @@
+{
+"type": "object",
+    "properties": {
+        "fruit": {"type": "string"},
+        "vegetable": {"type": "string"},
+        "how_many": {"type": "integer"},
+        "dressing": {"type": "string"}
+        }    
+}

tests/fixtures/bad_fruit_config.yaml

@@ -0,0 +1,7 @@
+fruit: papaya
+vegetable: 4
+how_many: 17
+dressing: ranch
+topping: crouton
+size: large
+meat: chicken

tests/test_validators.py

@@ -0,0 +1,38 @@
+'''
+Tests for schema validation tool
+'''
+import io
+import json
+from contextlib import redirect_stdout
+import os
+import pathlib
+import jsonschema
+import pytest
+import yaml
+
+
+uwtools_file_base = os.path.join(os.path.dirname(__file__))
+
+def test_validate_yaml_salad():     #pylint: disable=unused-variable
+    '''
+    Test that simple salad schema is accepted as valid json schema and that it validates both valid 
+    and bad input files
+    '''
+    schema_file = os.path.join(os.path.dirname(uwtools_file_base), pathlib.Path("schema/salad.jsonschema"))
+    input_file = os.path.join(uwtools_file_base, pathlib.Path("fixtures/fruit_config_similar.yaml"))
+    bad_input_file = os.path.join(uwtools_file_base, pathlib.Path("fixtures/bad_fruit_config.yaml"))
+
+    with open(schema_file, 'r', encoding="utf-8") as schema_file:
+        schema = json.load(schema_file)
+        with open(input_file, encoding="utf-8") as input_file:
+            infile = yaml.safe_load(input_file)
+        outstring = io.StringIO()
+        with redirect_stdout(outstring):
+            jsonschema.validate(infile, schema)
+        result = outstring.getvalue()
+        assert result == ""
+
+        with open(bad_input_file, encoding="utf-8") as bad_input_file:
+            bad_infile = yaml.safe_load(bad_input_file)
+        with pytest.raises(jsonschema.exceptions.ValidationError):
+            jsonschema.validate(bad_infile, schema)