/*
    * Copyright (C) 2006 The Guava Authors
    *
    * Licensed 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 com.google.common.base;
  
  import static com.google.common.base.CaseFormat.LOWER_CAMEL;
  import static com.google.common.base.CaseFormat.LOWER_HYPHEN;
  import static com.google.common.base.CaseFormat.LOWER_UNDERSCORE;
  import static com.google.common.base.CaseFormat.UPPER_CAMEL;
  import static com.google.common.base.CaseFormat.UPPER_UNDERSCORE;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.annotations.GwtIncompatible;
  import com.google.common.testing.NullPointerTester;
  import com.google.common.testing.SerializableTester;
  
  import junit.framework.TestCase;
  
  /**
   * Unit test for {@link CaseFormat}.
   *
   * @author Mike Bostock
   */
  @GwtCompatible(emulated = true)
  public class CaseFormatTest extends TestCase {
  
    public void testIdentity() {
      for (CaseFormat from : CaseFormat.values()) {
        assertSame(from + " to " + from, "foo", from.to(from, "foo"));
        for (CaseFormat to : CaseFormat.values()) {
          assertEquals(from + " to " + to, "", from.to(to, ""));
          assertEquals(from + " to " + to, " ", from.to(to, " "));
        }
      }
    }
  
    @GwtIncompatible("NullPointerTester")
    public void testNullArguments() {
      NullPointerTester tester = new NullPointerTester();
      tester.testAllPublicStaticMethods(CaseFormat.class);
      for (CaseFormat format : CaseFormat.values()) {
        tester.testAllPublicInstanceMethods(format);
      }
    }
  
    public void testLowerHyphenToLowerHyphen() {
      assertEquals("foo", LOWER_HYPHEN.to(LOWER_HYPHEN, "foo"));
      assertEquals("foo-bar", LOWER_HYPHEN.to(LOWER_HYPHEN, "foo-bar"));
    }
  
    public void testLowerHyphenToLowerUnderscore() {
      assertEquals("foo", LOWER_HYPHEN.to(LOWER_UNDERSCORE, "foo"));
      assertEquals("foo_bar", LOWER_HYPHEN.to(LOWER_UNDERSCORE, "foo-bar"));
    }
  
    public void testLowerHyphenToLowerCamel() {
      assertEquals("foo", LOWER_HYPHEN.to(LOWER_CAMEL, "foo"));
      assertEquals("fooBar", LOWER_HYPHEN.to(LOWER_CAMEL, "foo-bar"));
    }
  
    public void testLowerHyphenToUpperCamel() {
      assertEquals("Foo", LOWER_HYPHEN.to(UPPER_CAMEL, "foo"));
      assertEquals("FooBar", LOWER_HYPHEN.to(UPPER_CAMEL, "foo-bar"));
    }
  
    public void testLowerHyphenToUpperUnderscore() {
      assertEquals("FOO", LOWER_HYPHEN.to(UPPER_UNDERSCORE, "foo"));
      assertEquals("FOO_BAR", LOWER_HYPHEN.to(UPPER_UNDERSCORE, "foo-bar"));
    }
  
    public void testLowerUnderscoreToLowerHyphen() {
      assertEquals("foo", LOWER_UNDERSCORE.to(LOWER_HYPHEN, "foo"));
      assertEquals("foo-bar", LOWER_UNDERSCORE.to(LOWER_HYPHEN, "foo_bar"));
    }
  
    public void testLowerUnderscoreToLowerUnderscore() {
      assertEquals("foo", LOWER_UNDERSCORE.to(LOWER_UNDERSCORE, "foo"));
      assertEquals("foo_bar", LOWER_UNDERSCORE.to(LOWER_UNDERSCORE, "foo_bar"));
    }
  
    public void testLowerUnderscoreToLowerCamel() {
      assertEquals("foo", LOWER_UNDERSCORE.to(LOWER_CAMEL, "foo"));
      assertEquals("fooBar", LOWER_UNDERSCORE.to(LOWER_CAMEL, "foo_bar"));
    }
  
    public void testLowerUnderscoreToUpperCamel() {
     assertEquals("Foo", LOWER_UNDERSCORE.to(UPPER_CAMEL, "foo"));
     assertEquals("FooBar", LOWER_UNDERSCORE.to(UPPER_CAMEL, "foo_bar"));
   }
 
   public void testLowerUnderscoreToUpperUnderscore() {
     assertEquals("FOO", LOWER_UNDERSCORE.to(UPPER_UNDERSCORE, "foo"));
     assertEquals("FOO_BAR", LOWER_UNDERSCORE.to(UPPER_UNDERSCORE, "foo_bar"));
   }
 
   public void testLowerCamelToLowerHyphen() {
     assertEquals("foo", LOWER_CAMEL.to(LOWER_HYPHEN, "foo"));
     assertEquals("foo-bar", LOWER_CAMEL.to(LOWER_HYPHEN, "fooBar"));
     assertEquals("h-t-t-p", LOWER_CAMEL.to(LOWER_HYPHEN, "HTTP"));
   }
 
   public void testLowerCamelToLowerUnderscore() {
     assertEquals("foo", LOWER_CAMEL.to(LOWER_UNDERSCORE, "foo"));
     assertEquals("foo_bar", LOWER_CAMEL.to(LOWER_UNDERSCORE, "fooBar"));
     assertEquals("h_t_t_p", LOWER_CAMEL.to(LOWER_UNDERSCORE, "hTTP"));
   }
 
   public void testLowerCamelToLowerCamel() {
     assertEquals("foo", LOWER_CAMEL.to(LOWER_CAMEL, "foo"));
     assertEquals("fooBar", LOWER_CAMEL.to(LOWER_CAMEL, "fooBar"));
   }
 
   public void testLowerCamelToUpperCamel() {
     assertEquals("Foo", LOWER_CAMEL.to(UPPER_CAMEL, "foo"));
     assertEquals("FooBar", LOWER_CAMEL.to(UPPER_CAMEL, "fooBar"));
     assertEquals("HTTP", LOWER_CAMEL.to(UPPER_CAMEL, "hTTP"));
   }
 
   public void testLowerCamelToUpperUnderscore() {
     assertEquals("FOO", LOWER_CAMEL.to(UPPER_UNDERSCORE, "foo"));
     assertEquals("FOO_BAR", LOWER_CAMEL.to(UPPER_UNDERSCORE, "fooBar"));
   }
 
   public void testUpperCamelToLowerHyphen() {
     assertEquals("foo", UPPER_CAMEL.to(LOWER_HYPHEN, "Foo"));
     assertEquals("foo-bar", UPPER_CAMEL.to(LOWER_HYPHEN, "FooBar"));
   }
 
   public void testUpperCamelToLowerUnderscore() {
     assertEquals("foo", UPPER_CAMEL.to(LOWER_UNDERSCORE, "Foo"));
     assertEquals("foo_bar", UPPER_CAMEL.to(LOWER_UNDERSCORE, "FooBar"));
   }
 
   public void testUpperCamelToLowerCamel() {
     assertEquals("foo", UPPER_CAMEL.to(LOWER_CAMEL, "Foo"));
     assertEquals("fooBar", UPPER_CAMEL.to(LOWER_CAMEL, "FooBar"));
     assertEquals("hTTP", UPPER_CAMEL.to(LOWER_CAMEL, "HTTP"));
   }
 
   public void testUpperCamelToUpperCamel() {
     assertEquals("Foo", UPPER_CAMEL.to(UPPER_CAMEL, "Foo"));
     assertEquals("FooBar", UPPER_CAMEL.to(UPPER_CAMEL, "FooBar"));
   }
 
   public void testUpperCamelToUpperUnderscore() {
     assertEquals("FOO", UPPER_CAMEL.to(UPPER_UNDERSCORE, "Foo"));
     assertEquals("FOO_BAR", UPPER_CAMEL.to(UPPER_UNDERSCORE, "FooBar"));
     assertEquals("H_T_T_P", UPPER_CAMEL.to(UPPER_UNDERSCORE, "HTTP"));
     assertEquals("H__T__T__P", UPPER_CAMEL.to(UPPER_UNDERSCORE, "H_T_T_P"));
   }
 
   public void testUpperUnderscoreToLowerHyphen() {
     assertEquals("foo", UPPER_UNDERSCORE.to(LOWER_HYPHEN, "FOO"));
     assertEquals("foo-bar", UPPER_UNDERSCORE.to(LOWER_HYPHEN, "FOO_BAR"));
   }
 
   public void testUpperUnderscoreToLowerUnderscore() {
     assertEquals("foo", UPPER_UNDERSCORE.to(LOWER_UNDERSCORE, "FOO"));
     assertEquals("foo_bar", UPPER_UNDERSCORE.to(LOWER_UNDERSCORE, "FOO_BAR"));
   }
 
   public void testUpperUnderscoreToLowerCamel() {
     assertEquals("foo", UPPER_UNDERSCORE.to(LOWER_CAMEL, "FOO"));
     assertEquals("fooBar", UPPER_UNDERSCORE.to(LOWER_CAMEL, "FOO_BAR"));
   }
 
   public void testUpperUnderscoreToUpperCamel() {
     assertEquals("Foo", UPPER_UNDERSCORE.to(UPPER_CAMEL, "FOO"));
     assertEquals("FooBar", UPPER_UNDERSCORE.to(UPPER_CAMEL, "FOO_BAR"));
     assertEquals("HTTP", UPPER_UNDERSCORE.to(UPPER_CAMEL, "H_T_T_P"));
   }
 
   public void testUpperUnderscoreToUpperUnderscore() {
     assertEquals("FOO", UPPER_UNDERSCORE.to(UPPER_UNDERSCORE, "FOO"));
     assertEquals("FOO_BAR", UPPER_UNDERSCORE.to(UPPER_UNDERSCORE, "FOO_BAR"));
   }
 
   public void testConverterToForward() {
     assertEquals("FooBar", UPPER_UNDERSCORE.converterTo(UPPER_CAMEL).convert("FOO_BAR"));
     assertEquals("fooBar", UPPER_UNDERSCORE.converterTo(LOWER_CAMEL).convert("FOO_BAR"));
     assertEquals("FOO_BAR", UPPER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("FooBar"));
     assertEquals("FOO_BAR", LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).convert("fooBar"));
   }
 
   public void testConverterToBackward() {
     assertEquals("FOO_BAR", UPPER_UNDERSCORE.converterTo(UPPER_CAMEL).reverse().convert("FooBar"));
     assertEquals("FOO_BAR", UPPER_UNDERSCORE.converterTo(LOWER_CAMEL).reverse().convert("fooBar"));
     assertEquals("FooBar", UPPER_CAMEL.converterTo(UPPER_UNDERSCORE).reverse().convert("FOO_BAR"));
     assertEquals("fooBar", LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).reverse().convert("FOO_BAR"));
   }
 
   public void testConverter_nullConversions() {
     for (CaseFormat outer : CaseFormat.values()) {
       for (CaseFormat inner : CaseFormat.values()) {
         assertNull(outer.converterTo(inner).convert(null));
         assertNull(outer.converterTo(inner).reverse().convert(null));
       }
     }
   }
 
   public void testConverter_toString() {
     assertEquals(
         "LOWER_HYPHEN.converterTo(UPPER_CAMEL)",
         LOWER_HYPHEN.converterTo(UPPER_CAMEL).toString());
   }
 
   public void testConverter_serialization() {
     for (CaseFormat outer : CaseFormat.values()) {
       for (CaseFormat inner : CaseFormat.values()) {
         SerializableTester.reserializeAndAssert(outer.converterTo(inner));
       }
     }
   }
 }