/*
 * SonarQube Java
 * Copyright (C) 2012-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.java.ast.parser.grammar.expressions;

import com.google.common.base.Strings;
import org.junit.Test;
import org.sonar.java.ast.parser.JavaLexer;

import static org.sonar.sslr.tests.Assertions.assertThat;

public class ExpressionTest {

  /**
   * Our grammar accepts such constructions, whereas should not.
   */
  @Test
  public void error() {
    assertThat(JavaLexer.EXPRESSION)
      .matches("a = b + 1 = c + 2");
  }

  @Test
  public void realLife() {
    assertThat(JavaLexer.EXPRESSION)
      .matches("b >> 4")
      .matches("b >>= 4")
      .matches("b >>> 4")
      .matches("b >>>= 4")

      // method call
      .matches("SomeClass.<T>method(arguments)")
      .matches("this.<T>method(arguments)")
      .matches("super.<T>method(arguments)")
      .matches("oc.new innerClass<String>()")
      // constructor call
      .matches("<T>this(arguments)")
      .matches("<T>super(arguments)")
      .matches("new <Integer>Foo(42)")
      .matches("o.new <Integer>Foo(42)")
      // Java 7: diamond
      .matches("new HashMap<>()")

      // Java 8 : constructors with annotation types
      .matches("new int @Foo [12]")
      .matches("new int[12] @Foo [13] @Foo @Bar []")
      .matches("new Class1().new @NonNull Class2()")

      .matches("new @Foo innerClass(\"literal\")")
      .matches("new OuterClass.@Foo innerClass(\"literal\")")
      // Java 8 : Method references
      .matches("System.out::println")
      .matches("int[]::new")
      .matches("List::new")
      .matches("List<String>::size")
      .matches("List::size")
      .matches("int[]::clone")
      .matches("T::size")
      .matches("(Cast) T::size")
      .matches("Arrays::<String>sort")
      .matches("(foo?list.map(String::length):Collections.emptyList()) :: iterator")
      .matches("myMethod()::size")
      .matches("MyClass.this::size")
      .matches("myMethod().myMethod()::size")
      .matches("new MyClass(3).myMethod()::size")
      .notMatches("myMethod()::myMethod::myMethod")

      // Java 8 : Lambda expressions
      .matches("()->12")
      .matches("()->{}")
      .matches("a->a*a")
      .matches("(int a)->a*a")
      .matches("(a)->a*a")

      // Java 8 : Cast expression with bounds
      .matches("(Comparator<Map.Entry<K, V>> & Serializable) foo")
      .matches("(Callable[] & Serializable) foo")
      .matches("(Callable<Integer[]>[] & Serializable) foo")
      .matches("(Comparator<Map.Entry<K, V>>[] & Serializable) foo")
      .matches("(a & b) - c");

  }

  @Test
  public void test_SONARJAVA_793() {
    String bigInput = Strings.repeat("(", 64) + "1" + Strings.repeat(")", 64);
    assertThat(JavaLexer.EXPRESSION)
      .matches(bigInput);
  }

}