test: use generated table names to resolve flakiness in ITBigQueryTest

[lqiu96]

Fixes: #4108

[gemini-code-assist]

Summary of Changes

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This pull request addresses a known issue of test flakiness in the BigQuery integration tests by replacing hardcoded table names with dynamically generated ones. This change ensures that each test execution operates with unique resources, thereby eliminating potential conflicts and improving the overall stability and reliability of the test suite.

Highlights

• Test Flakiness Resolution: Implemented dynamic table name generation in various integration tests to prevent conflicts and flakiness caused by static table names.
• Enhanced Test Reliability: Modified several test methods within ITBigQueryTest.java to utilize the generateTableName utility, ensuring unique table identifiers for each test run.

Changelog

• google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/it/ITBigQueryTest.java
  • Updated sourceTableName, snapshotTableName, and restoredTableName in testSnapshotTableCopyJob to use generateTableName.
  • Updated destinationTableName in testInsertFromFile to use generateTableName.
  • Updated destinationTableName in testInsertFromFileWithLabels to use generateTableName.
  • Updated destinationTableName in testInsertWithDecimalTargetTypes to use generateTableName.
  • Updated destinationTableName in testWriteChannelPreserveAsciiControlCharacters to use generateTableName.
  • Updated destinationTableName in testReferenceFileSchemaUriForAvro to use generateTableName.
  • Updated destinationTableName in testReferenceFileSchemaUriForParquet to use generateTableName.
  • Updated destinationTableName in testCreateExternalTableWithReferenceFileSchemaAvro to use generateTableName.
  • Updated destinationTableName in testCreateExternalTableWithReferenceFileSchemaParquet to use generateTableName.
  • Updated sourceTableName and cloneTableName in testCloneTableCopyJob to use generateTableName.
  • Updated tableName in testExternalTableMetadataCachingNotEnable to use generateTableName.
  • Updated tableName in testExternalMetadataCacheModeFailForNonBiglake to use generateTableName.
  • Updated tableName in testObjectTable to use generateTableName.
  • Updated v1TableName and v2TableName in testLoadConfigurationFlexibleColumnName to use generateTableName.

Activity

• The pull request was created to fix an issue related to test flakiness, as referenced in issue bigquery.it.ITNightlyBigQueryTest: testSnapshotTableCopyJob failed #4108.

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Code Review

This pull request addresses test flakiness in ITBigQueryTest by replacing hardcoded table names with dynamically generated ones using the generateTableName utility. This change is applied consistently across numerous tests to prevent resource name collisions during parallel test execution. The implementation is correct and effectively resolves the flakiness issue.