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Validating JDBC Type Conversion Operations in Canal

This test suite validates the JDBC type conversion functionality in Canal’s client adapter, ensuring accurate data type mapping between different database systems. The tests cover various SQL data type conversions and edge cases for database integration scenarios.

Test Coverage Overview

The test suite provides comprehensive coverage of the JdbcTypeUtil class, focusing on type conversion operations.

Key areas tested include:

Binary data conversion (byte array handling)
Numeric type conversions (integer, long, float)
Boolean value handling
String type processing
Support for international character sets

Implementation Analysis

The testing approach utilizes JUnit 4 with PowerMock for robust unit testing capabilities. Each test case follows the Arrange-Act-Assert pattern, with clear separation of test setup, execution, and verification phases.

The implementation leverages PowerMockRunner for advanced mocking capabilities and includes timeout rules for performance monitoring.

Technical Details

Testing tools and configuration:

JUnit 4 testing framework
PowerMock for extended mocking functionality
ExpectedException Rule for exception testing
Timeout Rule set to 10000ms
Assert methods for various data type validations

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Consistent test method naming convention
Comprehensive edge case coverage
Clear test organization with setup and verification phases
Proper exception handling validation
Performance boundaries enforcement
International character support testing

alibaba/canal

client-adapter/common/src/test/java/com/alibaba/otter/canal/client/adapter/support/JdbcTypeUtilTest.java

            
package com.alibaba.otter.canal.client.adapter.support;

import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.rules.Timeout;
import org.junit.runner.RunWith;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
public class JdbcTypeUtilTest {

  @Rule public final ExpectedException thrown = ExpectedException.none();

  @Rule public final Timeout globalTimeout = new Timeout(10000);

  /* testedClasses: JdbcTypeUtil */
  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullNegativeNotNullOutput3() {

    // Arrange
    final String tableName = "foo";
    final String columnName = "foo";
    final String value = "foo";
    final int sqlType = -4;
    final String mysqlType = "foo";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertArrayEquals(new byte[] {(byte)102, (byte)111, (byte)111}, ((byte[])actual));
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullNegativeNotNullOutputPositive() {

    // Arrange
    final String tableName = "foo";
    final String columnName = "foo";
    final String value = "1234";
    final int sqlType = -5;
    final String mysqlType = "foo";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals(1234L, actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullNegativeNotNullOutputPositive2() {

    // Arrange
    final String tableName = "?????????";
    final String columnName = "?";
    final String value = "2";
    final int sqlType = -5;
    final String mysqlType = "bigint";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals(2L, actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputFalse() {

    // Arrange
    final String tableName = "?????????";
    final String columnName = "?";
    final String value = "0";
    final int sqlType = 16;
    final String mysqlType = "bigint\u046bunsigned";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertFalse((boolean)actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputNotNull() {

    // Arrange
    final String tableName = "1";
    final String columnName = "Bar";
    final String value = "1";
    final int sqlType = 12;
    final String mysqlType = "2";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals("1", actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputPositive() {

    // Arrange
    final String tableName = "foo";
    final String columnName = "foo";
    final String value = "3";
    final int sqlType = 4;
    final String mysqlType = "foo";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals(3, actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputTrue() {

    // Arrange
    final String tableName = "?????????";
    final String columnName = "?";
    final String value = "5";
    final int sqlType = 16;
    final String mysqlType = "bigintsunsigned";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertTrue((boolean)actual);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputZero2() {

    // Arrange
    final String tableName = "?????????";
    final String columnName = "?";
    final String value = "0";
    final int sqlType = 7;
    final String mysqlType = "bigint\u046bunsigned";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals(0.0f, (float)actual, 0.0f);
  }

  // Test written by Diffblue Cover.
  @Test
  public void typeConvertInputNotNullNotNullNotNullPositiveNotNullOutputZero3() {

    // Arrange
    final String tableName = "?????????";
    final String columnName = "?";
    final String value = "0";
    final int sqlType = 5;
    final String mysqlType = "bigintiunsigned";

    // Act
    final Object actual =
        JdbcTypeUtil.typeConvert(tableName, columnName, value, sqlType, mysqlType);

    // Assert result
    Assert.assertEquals((short)0, actual);
  }
}