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/*
 * 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.junit.jupiter.api.Test;
import org.onap.validation.yaml.exception.YamlProcessingException;
import org.onap.validation.yaml.model.YamlDocument;
import org.onap.validation.yaml.model.YamlDocumentFactory;
import org.yaml.snakeyaml.parser.ParserException;
import org.yaml.snakeyaml.scanner.ScannerException;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;


class YamlLoaderTest {

    private static final int EXPECTED_NUMBER_OF_DOCUMENTS = 5;
    private static final String LETTER_S_WITH_ASCII_CODE = "s(115)";

    @Test
    void shouldLoadAllDocumentsFromYamlFile() throws YamlDocumentFactory.YamlDocumentParsingException {
        // when
        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFile();

        // then
        assertThat(documents).hasSize(EXPECTED_NUMBER_OF_DOCUMENTS);
    }

    @Test
    void shouldLoadAllDocumentsFromJsonStyleYamlFile() throws YamlDocumentFactory.YamlDocumentParsingException {
        // when
        List<YamlDocument> documents = YamlLoadingUtils.loadValidJsonStyleMultiDocumentYamlFile();

        // then
        assertThat(documents).hasSize(EXPECTED_NUMBER_OF_DOCUMENTS);
    }

    @Test
    void shouldLoadAllDocumentsFromYamlFileUsingPathInString() throws YamlProcessingException {
        // when
        List<YamlDocument> documents = YamlLoadingUtils.loadValidMultiDocumentYamlFileUsingStringPath();

        // then
        assertThat(documents).hasSize(EXPECTED_NUMBER_OF_DOCUMENTS);
    }

    @Test
    void shouldThrowExceptionWhenLoadingDocumentsFromInvalidYamlFile() {
        // when then
        assertThatThrownBy(YamlLoadingUtils::tryToLoadMultiDocumentInvalidYamlFile)
                .isInstanceOf(ParserException.class)
                .hasMessageContaining("expected the node content, but found '<document end>'");
    }

    @Test
    void shouldThrowExceptionWhenLoadingDocumentsFromInvalidYamlFileUsingPathInString() {
        // when then
        assertThatThrownBy(YamlLoadingUtils::tryToLoadMultiDocumentInvalidYamlFileUsingStringPath)
                .isInstanceOf(ParserException.class)
                .hasMessageContaining("expected the node content, but found '<document end>'");
    }

    @Test
    void shouldThrowExceptionWhenLoadingInvalidYamlFileWithIncorrectKeyMapping() {
        // when then
        assertThatThrownBy(YamlLoadingUtils::tryToLoadInvalidYamlFileWithIncorrectKeyMapping)
                .isInstanceOf(ScannerException.class)
                .hasMessageContaining("mapping values are not allowed here");
    }

    @Test
    void shouldThrowExceptionWhenLoadingInvalidYamlFileWithUnknownEscapeCharacter() {
        // when then
        assertThatThrownBy(YamlLoadingUtils::tryToLoadInvalidYamlFileWithUnknownEscapeCharacter)
                .isInstanceOf(ScannerException.class)
                .hasMessageContaining("found unknown escape character " + LETTER_S_WITH_ASCII_CODE);
    }
}