com.github.jcustenborder.kafka.connect.utils.AssertStruct.java Source code

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Here is the source code for com.github.jcustenborder.kafka.connect.utils.AssertStruct.java

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/**
 * Copyright  2016 Jeremy Custenborder (jcustenborder@gmail.com)
 *
 * 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 com.github.jcustenborder.kafka.connect.utils;

import com.google.common.base.Strings;
import com.google.common.io.BaseEncoding;
import org.apache.kafka.connect.data.Date;
import org.apache.kafka.connect.data.Decimal;
import org.apache.kafka.connect.data.Field;
import org.apache.kafka.connect.data.Struct;
import org.apache.kafka.connect.data.Time;
import org.apache.kafka.connect.data.Timestamp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;

import static com.github.jcustenborder.kafka.connect.utils.AssertSchema.assertSchema;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

public class AssertStruct {
    private static final Logger log = LoggerFactory.getLogger(AssertStruct.class);

    static <T> T castAndVerify(Class<T> cls, Struct struct, Field field, boolean expected) {
        final Object value = struct.get(field.name());

        final String prefix = String.format("%s('%s') ", expected ? "expected" : "actual", field.name());

        if (!field.schema().isOptional()) {
            assertNotNull(value, prefix + "has a require schema. Should not be null.");
        }

        if (null == value) {
            return null;
        }

        assertTrue(cls.isInstance(value), String.format(prefix + "should be a %s", cls.getSimpleName()));

        return cls.cast(value);
    }

    public static void assertStruct(final Struct expected, final Struct actual, String message) {
        String prefix = Strings.isNullOrEmpty(message) ? "" : message + ": ";

        if (null == expected) {
            assertNull(actual, prefix + "actual should be null.");
            return;
        }

        assertSchema(expected.schema(), actual.schema(), "schema does not match.");
        for (Field expectedField : expected.schema().fields()) {
            log.trace("assertStruct() - testing field '{}'", expectedField.name());
            final Object expectedValue = expected.get(expectedField.name());
            final Object actualValue = actual.get(expectedField.name());

            if (Decimal.LOGICAL_NAME.equals(expectedField.schema().name())) {
                final BigDecimal expectedDecimal = castAndVerify(BigDecimal.class, expected, expectedField, true);
                final BigDecimal actualDecimal = castAndVerify(BigDecimal.class, actual, expectedField, false);
                assertEquals(expectedDecimal, actualDecimal, prefix + expectedField.name() + " does not match.");
            } else if (Timestamp.LOGICAL_NAME.equals(expectedField.schema().name())
                    || Date.LOGICAL_NAME.equals(expectedField.schema().name())
                    || Time.LOGICAL_NAME.equals(expectedField.schema().name())) {
                final java.util.Date expectedDate = castAndVerify(java.util.Date.class, expected, expectedField,
                        true);
                final java.util.Date actualDate = castAndVerify(java.util.Date.class, actual, expectedField, false);
                assertEquals(expectedDate, actualDate, prefix + expectedField.name() + " does not match.");
            } else {
                switch (expectedField.schema().type()) {
                case ARRAY:
                    final List<Object> expectedArray = castAndVerify(List.class, expected, expectedField, true);
                    final List<Object> actualArray = castAndVerify(List.class, actual, expectedField, false);
                    assertEquals(expectedArray, actualArray, prefix + expectedField.name() + " does not match.");
                    break;
                case MAP:
                    final Map<Object, Object> expectedMap = castAndVerify(Map.class, expected, expectedField, true);
                    final Map<Object, Object> actualMap = castAndVerify(Map.class, actual, expectedField, false);
                    assertEquals(expectedMap, actualMap, prefix + expectedField.name() + " does not match.");
                    break;
                case STRUCT:
                    final Struct expectedStruct = castAndVerify(Struct.class, expected, expectedField, true);
                    final Struct actualStruct = castAndVerify(Struct.class, actual, expectedField, false);
                    assertStruct(expectedStruct, actualStruct, prefix + expectedField.name() + " does not match.");
                    break;
                case BYTES:
                    final byte[] expectedByteArray = castAndVerify(byte[].class, expected, expectedField, true);
                    final byte[] actualByteArray = castAndVerify(byte[].class, actual, expectedField, false);
                    assertEquals(
                            null == expectedByteArray ? ""
                                    : BaseEncoding.base32Hex().encode(expectedByteArray).toString(),
                            null == actualByteArray ? ""
                                    : BaseEncoding.base32Hex().encode(actualByteArray).toString(),
                            prefix + expectedField.name() + " does not match.");
                    break;
                default:
                    assertEquals(expectedValue, actualValue, prefix + expectedField.name() + " does not match.");
                    break;
                }
            }
        }
    }

    public static void assertStruct(final Struct expected, final Struct actual) {
        assertStruct(expected, actual, null);
    }
}