Add validation of YAML documents, with use of schema

Issue-ID: VNFSDK-594
Signed-off-by: Bartosz Gardziejewski <bartosz.gardziejewski@nokia.com>
Change-Id: I4afc573f564c642a349736e50b50c591b9b18650

4 files changed, 206 insertions, 2 deletions

diff --git a/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoaderTest.java b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoaderTest.java
index 1680a40..03999a3 100644
--- a/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoaderTest.java
+++ b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoaderTest.java
@@ -20,11 +20,12 @@ package org.onap.validation.yaml;
 import org.junit.Test;
 import org.onap.validation.yaml.model.YamlDocument;
 import org.onap.validation.yaml.model.YamlDocumentFactory;
+import org.yaml.snakeyaml.parser.ParserException;
 
-import java.net.URL;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 
 public class YamlLoaderTest {
@@ -35,7 +36,15 @@ public class YamlLoaderTest {
         List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
 
         // then
-        assertThat(documents.size()).isEqualTo(4);
+        assertThat(documents).hasSize(4);
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenLoadingDocumentsFromInvalidYamlFile() {
+        // when then
+        assertThatThrownBy(YamlLoadingUtils::tryToLoadMultiDocumentInvalidYamlFile
+        ).isInstanceOf(ParserException.class)
+            .hasMessageContaining("expected the node content, but found DocumentEnd");
     }
 
 }
diff --git a/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoadingUtils.java b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoadingUtils.java
index 1e3618b..5827f66 100644
--- a/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoadingUtils.java
+++ b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlLoadingUtils.java
@@ -28,11 +28,16 @@ public final class YamlLoadingUtils {
 
     private YamlLoadingUtils() {}
 
+    public static final int VALID_YAML_DOCUMENT_INDEX = 3;
+    public static final int YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX = 2;
+    public static final int YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX = 1;
+
     private static final String PATH_TO_VALID_YAML = "yaml_schema/PM_Dictionary.yaml";
     private static final String PATH_TO_SIMPLE_VALID_SCHEMA = "yaml_schema/Simple_Valid_Schema.yaml";
     private static final String PATH_TO_SIMPLE_VALID_SCHEMA_MULTI_ROOT = "yaml_schema/Simple_Valid_Schema_Multi_Root.yaml";
     private static final String PATH_TO_SIMPLE_INVALID_SCHEMA = "yaml_schema/Simple_Invalid_Schema_Construction.yaml";
     private static final String PATH_TO_SIMPLE_INVALID_SCHEMA_FOR_LAZY_LOADING = "yaml_schema/Simple_Invalid_Schema_LazyLoading.yaml";
+    private static final String PATH_TO_MULTI_DOCUMENT_INVALID_YAML = "yaml_schema/Multi_Document_Invalid.yaml";
 
     public static List<YamlDocument> loadValidMultiDocumentYamlFile() throws YamlDocumentParsingException {
         return new YamlLoader().loadMultiDocumentYamlFile(getUrlForGivenPath(PATH_TO_VALID_YAML));
@@ -54,6 +59,10 @@ public final class YamlLoadingUtils {
         return new YamlLoader().loadMultiDocumentYamlFile(getUrlForGivenPath(PATH_TO_SIMPLE_VALID_SCHEMA_MULTI_ROOT)).get(0);
     }
 
+    public static List<YamlDocument> tryToLoadMultiDocumentInvalidYamlFile() throws YamlDocumentParsingException {
+        return new YamlLoader().loadMultiDocumentYamlFile(getUrlForGivenPath(PATH_TO_MULTI_DOCUMENT_INVALID_YAML));
+    }
+
     private static URL getUrlForGivenPath(String path) {
         return YamlLoadingUtils.class.getClassLoader().getResource(path);
     }
diff --git a/csarvalidation/src/test/java/org/onap/validation/yaml/YamlValidatorTest.java b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlValidatorTest.java
new file mode 100644
index 0000000..418ae55
--- /dev/null
+++ b/csarvalidation/src/test/java/org/onap/validation/yaml/YamlValidatorTest.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2020 Nokia
+ *
+ * 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
+ *
+ * http://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.
+ *
+ */
+
+package org.onap.validation.yaml;
+
+import org.assertj.core.util.Lists;
+import org.junit.Test;
+import org.onap.validation.yaml.exception.YamlProcessingException;
+import org.onap.validation.yaml.model.SchemaValidationError;
+import org.onap.validation.yaml.model.YamlDocument;
+import org.onap.validation.yaml.schema.YamlSchemaFactory;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.onap.validation.yaml.YamlLoadingUtils.VALID_YAML_DOCUMENT_INDEX;
+import static org.onap.validation.yaml.YamlLoadingUtils.YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX;
+import static org.onap.validation.yaml.YamlLoadingUtils.YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX;
+
+public class YamlValidatorTest {
+
+    @Test
+    public void shouldCreateValidatorUsingSchemaLoadedFromYamlFileAndValidatedDocumentsFromThatFile()
+        throws YamlProcessingException {
+
+        // given
+        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
+        YamlValidator validator = new YamlValidator(new YamlSchemaFactory().createTreeStructuredYamlSchema(documents.get(0)));
+        Map<Integer,List<SchemaValidationError>> validationErrors = new HashMap<>();
+
+        SchemaValidationError expectedValidationValueError =
+            new SchemaValidationError(
+                "/pmMetaData/pmFields/measResultType",
+                "Value is not in array of accepted values.\n"
+                    + " value:  integer\n"
+                    + "  accepted values:  [float, uint32, uint64]"
+            );
+        SchemaValidationError expectedValidationKeyError =
+            new SchemaValidationError(
+                "/pmMetaData/pmFields/",
+                "Key not found: measChangeType"
+            );
+
+        // when
+        for (int documentIndex = 1 ; documentIndex < documents.size() ; documentIndex++) {
+            validationErrors.put(documentIndex, validator.validate(documents.get(documentIndex)));
+        }
+
+        // then
+        assertThat(validationErrors.size()).isEqualTo(3);
+        assertThat(validationErrors).containsKeys(1,2,3);
+        assertThat(validationErrors.get(YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX)).hasSize(2);
+        assertThat(validationErrors.get(YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX))
+            .usingFieldByFieldElementComparator()
+            .containsAll(
+                Lists.list(
+                    expectedValidationValueError,
+                    expectedValidationKeyError
+                ));
+        assertThat(validationErrors.get(YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX)).hasSize(1);
+        assertThat(validationErrors.get(YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX))
+            .usingFieldByFieldElementComparator()
+            .contains(
+                    expectedValidationKeyError
+            );
+        assertThat(validationErrors.get(VALID_YAML_DOCUMENT_INDEX)).hasSize(0);
+    }
+
+}
diff --git a/csarvalidation/src/test/java/org/onap/validation/yaml/process/YamlValidationProcessTest.java b/csarvalidation/src/test/java/org/onap/validation/yaml/process/YamlValidationProcessTest.java
new file mode 100644
index 0000000..1380a9d
--- /dev/null
+++ b/csarvalidation/src/test/java/org/onap/validation/yaml/process/YamlValidationProcessTest.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2020 Nokia
+ *
+ * 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
+ *
+ * http://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.
+ *
+ */
+
+package org.onap.validation.yaml.process;
+
+import org.junit.Test;
+import org.onap.validation.yaml.YamlLoadingUtils;
+import org.onap.validation.yaml.exception.YamlProcessingException;
+import org.onap.validation.yaml.model.SchemaValidationError;
+import org.onap.validation.yaml.model.YamlDocument;
+import org.onap.validation.yaml.schema.YamlSchema;
+import org.onap.validation.yaml.schema.YamlSchemaFactory;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.onap.validation.yaml.YamlLoadingUtils.VALID_YAML_DOCUMENT_INDEX;
+import static org.onap.validation.yaml.YamlLoadingUtils.YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX;
+import static org.onap.validation.yaml.YamlLoadingUtils.YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX;
+
+
+public class YamlValidationProcessTest {
+
+    @Test
+    public void shouldReturnNoErrorWhenProcessingValidPmDictionaryYaml()
+        throws YamlProcessingException {
+        // given
+        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
+        YamlSchema schema = new YamlSchemaFactory().createTreeStructuredYamlSchema(documents.get(0));
+        YamlDocument document = documents.get(VALID_YAML_DOCUMENT_INDEX);
+
+        // when
+        List<SchemaValidationError> errors = new YamlValidationProcess(schema,document).validate();
+
+        // then
+        assertThat(errors).isEmpty();
+    }
+
+    @Test
+    public void shouldReturnOneErrorWhenProcessingPmDictionaryYamlWithMissingField()
+        throws YamlProcessingException {
+        // given
+        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
+        YamlSchema schema = new YamlSchemaFactory().createTreeStructuredYamlSchema(documents.get(0));
+        YamlDocument document = documents.get(YAML_DOCUMENT_WITH_MISSING_FIELD_INDEX);
+
+        // when
+        List<SchemaValidationError> errors = new YamlValidationProcess(schema,document).validate();
+
+        // then
+        assertThat(errors).hasSize(1);
+    }
+
+    @Test
+    public void shouldReturnTwoErrorsWhenProcessingPmDictionaryYamlWithMissingFieldAndIncorrectValue()
+        throws YamlProcessingException {
+        // given
+        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
+        YamlSchema schema = new YamlSchemaFactory().createTreeStructuredYamlSchema(documents.get(0));
+        YamlDocument document = documents.get(YAML_DOCUMENT_WITH_MISSING_FIELD_AND_WRONG_VALUE_INDEX);
+
+        // when
+        List<SchemaValidationError> errors = new YamlValidationProcess(schema,document).validate();
+
+        // then
+        assertThat(errors).hasSize(2);
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenProcessingPmDictionaryIsNotValidYaml()
+        throws YamlProcessingException {
+        // given
+        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();
+        YamlDocument schemaInYaml = YamlLoadingUtils.loadSimpleInvalidYamlSchemaForLazyLoadingFile();
+        YamlSchema schema = new YamlSchemaFactory().createTreeStructuredYamlSchema(schemaInYaml);
+        YamlDocument document = documents.get(VALID_YAML_DOCUMENT_INDEX);
+
+        // when then
+        assertThatThrownBy(() ->
+            new YamlValidationProcess(schema,document).validate()
+        ).isInstanceOf(YamlProcessingException.class)
+            .hasMessageContaining(
+                String.format("Lazy loading failed, due to yaml parsing exception.")
+            );
+    }
+}