content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.beam.it.gcp.spanner.utils;
  
  import static com.google.common.truth.Truth.assertThat;
  import static org.apache.beam.it.gcp.spanner.utils.SpannerResourceManagerUtils.generateDatabaseId;
  import static org.apache.beam.it.gcp.spanner.utils.SpannerResourceManagerUtils.generateInstanceId;
  import static org.junit.Assert.assertThrows;
  
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link SpannerResourceManagerUtils}. */
  @RunWith(JUnit4.class)
  public final class SpannerResourceManagerUtilsTest {
  
    @Test
    public void testGenerateInstanceIdShouldReplaceNonLetterFirstCharWithLetter() {
      String testBaseString = "0-test";
  
      String actual = generateInstanceId(testBaseString);
  
      assertThat(actual).matches("[a-z]-test-\\d{8}-\\d{6}-\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldNotReplaceDigitLastCharWithLetter() {
      String testBaseString = "db_0";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("db_0_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldReplaceDollarSignWithUnderscore() {
      String testBaseString = "t$db";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("t_db_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldReplaceDotWithUnderscore() {
      String testBaseString = "test.database";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("test_da_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldReplaceHyphenWithUnderscore() {
      String testBaseString = "test-database";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("test_da_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldReplaceNonLetterFirstCharWithLetter() {
      String testBaseString = "0_database";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("[a-z]_datab_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldReplaceUpperCaseLettersWithLowerCase() {
      String testBaseString = "TDa";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("tda_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldTrimTrailingUnderscore() {
      String testBaseString = "test_database___";
  
      String actual = generateDatabaseId(testBaseString);
  
      assertThat(actual).matches("test_da_\\d{8}_\\d{6}_\\d{6}");
    }
  
    @Test
    public void testGenerateDatabaseIdShouldThrowErrorWithEmptyInput() {
      String testBaseString = "";
  
      assertThrows(IllegalArgumentException.class, () -> generateDatabaseId(testBaseString));
    }
  }
  