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   *  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.causeway.core.metamodel.facets.value;
  
  import java.math.BigDecimal;
  import java.math.RoundingMode;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import org.apache.causeway.applib.exceptions.recoverable.TextEntryParseException;
  import org.apache.causeway.core.metamodel.valuesemantics.BigDecimalValueSemantics;
  
  class BigDecimalValueSemanticsProviderTest
  extends ValueSemanticsProviderAbstractTestCase<BigDecimal> {
  
      private BigDecimalValueSemantics value;
      private BigDecimal bigDecimal;
  
      @BeforeEach
      void setUpObjects() throws Exception {
          bigDecimal = new BigDecimal("34132.199");
          allowMockAdapterToReturn(bigDecimal);
  
          BigDecimalValueSemantics valueSemantics = new BigDecimalValueSemantics();
          valueSemantics.setCausewayConfiguration(causewayConfiguration);
          setSemantics(value = valueSemantics);
      }
  
      @Test
      void parseValidString() throws Exception {
          final Object newValue = value.parseTextRepresentation(null, "2142342334");
          assertEquals(new BigDecimal(2142342334L), newValue);
      }
  
      @Test
      void parseInvalidString() throws Exception {
          try {
              value.parseTextRepresentation(null, "214xxx2342334");
              fail();
          } catch (final TextEntryParseException expected) {
          }
      }
  
      @Test
      void parseInvalidStringWithGroupingSeparator() throws Exception {
          try {
              value.parseTextRepresentation(null, "123,999.01");
              fail();
          } catch (final TextEntryParseException expected) {
          }
      }
  
      @Test
      void parseValidStringWithGroupingSeparatorIfConfiguredToAllow() throws Exception {
          causewayConfiguration.getValueTypes().getBigDecimal().getEditing().setUseGroupingSeparator(true);
  
          BigDecimal bd = value.parseTextRepresentation(null, "123,999.01");
  
          assertThat(bd).isEqualTo(new BigDecimal("123999.01").setScale(2, RoundingMode.HALF_EVEN));
      }
  
      @Test
      void demonstrateTheRiskOfAllowingGroupingSeparatorIfConfiguredToAllow() throws Exception {
  
          // default disallows grouping separator
          try {
              value.parseTextRepresentation(null, "1239,99");
              fail();
          } catch (final TextEntryParseException expected) {
          }
  
          // but if we allow it...
          causewayConfiguration.getValueTypes().getBigDecimal().getEditing().setUseGroupingSeparator(true);
  
          BigDecimal bigDecimal = value.parseTextRepresentation(null, "1239,99");
          assertThat(bigDecimal).isEqualTo(new BigDecimal(123999));
      }
  
      @Test
      void parseValidStringWithNoGroupingSeparator() throws Exception {
          value.parseTextRepresentation(null, "123999.01");
      }
  
      @Test
      void titleOf() {
          assertEquals("34,132.199", value.titlePresentation(null, bigDecimal));
      }
  
      @Test
      void titleOfWhenUseGroupingSeparator() {
          causewayConfiguration.getValueTypes().getBigDecimal().setUseGroupingSeparator(true);
  
          assertEquals("34,132.199", value.titlePresentation(null, bigDecimal));
      }
  
      @Override
      protected BigDecimal getSample() {
          return bigDecimal;
      }
  
      @Override
      protected void assertValueEncodesToJsonAs(final BigDecimal a, final String json) {
          assertEquals("34132.199", json);
      }
  
  }
  