SNOW-1001928: Fix flaky test DatabaseMetaDataLatestIT.testHandlingSpe…

…cialChars (#1599)

* SNOW-1001928: Fix flaky test DatabaseMetaDataLatestIT.testHandlingSpecialChars
* SNOW-1001928: Create and drop schema in Metadata tests inside lambda

src/test/java/net/snowflake/client/TestUtil.java

@@ -8,8 +8,10 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
+import java.sql.Statement;
 import java.util.regex.Pattern;
 import net.snowflake.client.core.SFException;
+import net.snowflake.client.jdbc.SnowflakeUtil;
 import net.snowflake.client.log.SFLogger;
 import net.snowflake.client.log.SFLoggerFactory;
 import org.junit.Assert;
@@ -69,4 +71,40 @@ public static void assertValidQueryId(String queryId) {
     assertTrue(
         "Expecting " + queryId + " is a valid UUID", QUERY_ID_REGEX.matcher(queryId).matches());
   }
+
+  /**
+   * Creates schema and deletes it at the end of the passed function execution
+   *
+   * @param statement statement
+   * @param schemaName name of schema to create and delete after lambda execution
+   * @param action action to execute when schema was created
+   * @throws Exception when any error occurred
+   */
+  public static void withSchema(Statement statement, String schemaName, ThrowingRunnable action)
+      throws Exception {
+    try {
+      statement.execute("CREATE OR REPLACE SCHEMA " + schemaName);
+      action.run();
+    } finally {
+      statement.execute("DROP SCHEMA " + schemaName);
+    }
+  }
+
+  /**
+   * Creates schema and deletes it at the end of the passed function execution
+   *
+   * @param statement statement
+   * @param action action to execute when schema was created
+   * @throws Exception when any error occurred
+   */
+  public static void withRandomSchema(Statement statement, ThrowingConsumer<String> action)
+      throws Exception {
+    String customSchema = "TEST_SCHEMA_" + SnowflakeUtil.randomAlphaNumeric(5);
+    try {
+      statement.execute("CREATE OR REPLACE SCHEMA " + customSchema);
+      action.call(customSchema);
+    } finally {
+      statement.execute("DROP SCHEMA " + customSchema);
+    }
+  }
 }

src/test/java/net/snowflake/client/ThrowingConsumer.java

@@ -0,0 +1,6 @@
+package net.snowflake.client;
+
+@FunctionalInterface
+public interface ThrowingConsumer<T> {
+  void call(T parameter) throws Exception;
+}

src/test/java/net/snowflake/client/ThrowingRunnable.java

@@ -0,0 +1,6 @@
+package net.snowflake.client;
+
+@FunctionalInterface
+public interface ThrowingRunnable {
+  void run() throws Exception;
+}