Add JsonToPdxConverter interface implementation converting JSON to PDX backed by Apache Geode's o.a.g.pdx.JSONFormatter class and Jackson's ObjectMapper.
Resolves gh-67.
This commit is contained in:
John Blum
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/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package org.springframework.geode.data.json.converter.support;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.mockito.ArgumentMatchers.eq;
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import static org.mockito.Mockito.doReturn;
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import static org.mockito.Mockito.doThrow;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.never;
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import static org.mockito.Mockito.spy;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.verifyNoInteractions;
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import java.util.Arrays;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.core.io.JsonEOFException;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.node.ArrayNode;
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import com.fasterxml.jackson.databind.node.JsonNodeType;
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import com.fasterxml.jackson.databind.node.ObjectNode;
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import org.junit.Test;
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import org.apache.geode.pdx.PdxInstance;
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import org.springframework.dao.DataRetrievalFailureException;
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import org.springframework.geode.data.json.converter.JsonToPdxConverter;
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/**
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* Unit Tests for {@link JacksonJsonToPdxConverter}.
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*
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* @author John Blum
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* @see org.junit.Test
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* @see org.mockito.Mockito
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* @see org.apache.geode.pdx.PdxInstance
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* @see org.springframework.geode.data.json.converter.JsonToPdxConverter
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* @see org.springframework.geode.data.json.converter.support.JacksonJsonToPdxConverter
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* @see com.fasterxml.jackson.databind.ObjectMapper
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* @since 1.3.0
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*/
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public class JacksonJsonToPdxConverterUnitTests {
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@Test
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public void convertJsonArrayToPdx() throws JsonProcessingException {
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String jonDoeJson = "{ \"name\": \"Jon Doe\" }";
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String janeDoeJson = "{ \"name\": \"Jane Doe\" }";
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String json = String.format("[%s, %s]", jonDoeJson, janeDoeJson);
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PdxInstance jonDoePdx = mock(PdxInstance.class);
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PdxInstance janeDoePdx = mock(PdxInstance.class);
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ObjectMapper mockObjectMapper = mock(ObjectMapper.class);
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ObjectNode jonDoeNode = mock(ObjectNode.class);
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ObjectNode janeDoeNode = mock(ObjectNode.class);
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ArrayNode mockArrayNode = mock(ArrayNode.class);
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doReturn(mockArrayNode).when(mockObjectMapper).readTree(eq(json));
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doReturn(true).when(mockArrayNode).isArray();
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doReturn(Arrays.asList(jonDoeNode, janeDoeNode).iterator()).when(mockArrayNode).elements();
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doReturn(jonDoeJson).when(jonDoeNode).toString();
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doReturn(janeDoeJson).when(janeDoeNode).toString();
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JsonToPdxConverter mockJsonToPdxConverter = mock(JsonToPdxConverter.class);
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doReturn(jonDoePdx).when(mockJsonToPdxConverter).convert(eq(jonDoeJson));
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doReturn(janeDoePdx).when(mockJsonToPdxConverter).convert(eq(janeDoeJson));
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JacksonJsonToPdxConverter converter = spy(new JacksonJsonToPdxConverter());
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doReturn(mockJsonToPdxConverter).when(converter).getJsonToPdxConverter();
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doReturn(mockObjectMapper).when(converter).getObjectMapper();
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assertThat(converter.convert(json)).containsExactlyInAnyOrder(jonDoePdx, janeDoePdx);
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verify(converter, times(1)).getObjectMapper();
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verify(converter, times(1)).getJsonToPdxConverter();
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verify(mockObjectMapper, times(1)).readTree(eq(json));
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verify(mockJsonToPdxConverter, times(1)).convert(eq(jonDoeJson));
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verify(mockJsonToPdxConverter, times(1)).convert(eq(janeDoeJson));
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verify(mockArrayNode, times(1)).isArray();
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verify(mockArrayNode, never()).isObject();
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verify(mockArrayNode, times(1)).elements();
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verifyNoInteractions(jonDoePdx, janeDoePdx);
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}
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@Test
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public void convertJsonObjectToPdx() throws JsonProcessingException {
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String json = "{ \"name\": \"Jon Doe\" }";
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PdxInstance mockPdxInstance = mock(PdxInstance.class);
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ObjectMapper mockObjectMapper = mock(ObjectMapper.class);
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ObjectNode mockObjectNode = mock(ObjectNode.class);
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doReturn(mockObjectNode).when(mockObjectMapper).readTree(eq(json));
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doReturn(JsonNodeType.OBJECT).when(mockObjectNode).getNodeType();
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doReturn(json).when(mockObjectNode).toString();
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JsonToPdxConverter mockJsonToPdxConverter = mock(JsonToPdxConverter.class);
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doReturn(mockPdxInstance).when(mockJsonToPdxConverter).convert(eq(json));
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JacksonJsonToPdxConverter converter = spy(new JacksonJsonToPdxConverter());
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doReturn(mockJsonToPdxConverter).when(converter).getJsonToPdxConverter();
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doReturn(mockObjectMapper).when(converter).getObjectMapper();
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assertThat(converter.convert(json)).isEqualTo(new PdxInstance[] { mockPdxInstance });
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verify(converter, times(1)).getObjectMapper();
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verify(converter, times(1)).getJsonToPdxConverter();
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verify(mockObjectMapper, times(1)).readTree(eq(json));
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verify(mockObjectNode, times(1)).getNodeType();
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verifyNoInteractions(mockPdxInstance);
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}
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@Test(expected = IllegalStateException.class)
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public void convertUnhandledJsonNodeType() throws JsonProcessingException {
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String json = "{}";
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ObjectMapper mockObjectMapper = mock(ObjectMapper.class);
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JsonNode mockJsonNode = mock(JsonNode.class);
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doReturn(mockJsonNode).when(mockObjectMapper).readTree(eq(json));
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doReturn(JsonNodeType.BINARY).when(mockJsonNode).getNodeType();
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JacksonJsonToPdxConverter converter = spy(new JacksonJsonToPdxConverter());
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doReturn(mockObjectMapper).when(converter).getObjectMapper();
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try {
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converter.convert(json);
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}
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catch (IllegalStateException expected) {
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assertThat(expected)
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.hasMessage("Unable to process JSON node of type [BINARY]; expected either an [OBJECT] or an [ARRAY]");
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assertThat(expected).hasNoCause();
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throw expected;
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}
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finally {
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verify(converter, times(1)).getObjectMapper();
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verify(mockObjectMapper, times(1)).readTree(eq(json));
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verify(mockJsonNode, times(3)).getNodeType();
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}
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}
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@Test(expected = DataRetrievalFailureException.class)
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public void convertHandlesJsonProcessingException() throws JsonProcessingException {
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String json = "[]";
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ObjectMapper mockObjectMapper = mock(ObjectMapper.class);
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doThrow(new JsonEOFException(null, null, "TEST")).when(mockObjectMapper).readTree(eq(json));
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JacksonJsonToPdxConverter converter = spy(new JacksonJsonToPdxConverter());
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doReturn(mockObjectMapper).when(converter).getObjectMapper();
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try {
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converter.convert(json);
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}
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catch (DataRetrievalFailureException expected) {
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assertThat(expected).hasMessageStartingWith("Failed to read JSON content");
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assertThat(expected).hasCauseInstanceOf(JsonProcessingException.class);
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assertThat(expected.getCause()).hasMessage("TEST");
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assertThat(expected.getCause()).hasNoCause();
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throw expected;
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}
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}
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}
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