/*
 [The "BSD licence"]
 Copyright (c) 2005-2008 Terence Parr
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.antlr.test;

import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.*;

/** Test the set stuff in lexer and parser */
public class TestSets extends BaseTest {
	protected boolean debug = false;

	/** Public default constructor used by TestRig */
	public TestSets() {
	}

	@Test public void testSeqDoesNotBecomeSet() throws Exception {
		// this must return A not I to the parser; calling a nonfragment rule
		// from a nonfragment rule does not set the overall token.
		String grammar =
			"grammar P;\n" +
			"a : C {System.out.println(input);} ;\n" +
			"fragment A : '1' | '2';\n" +
			"fragment B : '3' '4';\n" +
			"C : A | B;\n";
		String found = execParser("P.g", grammar, "PParser", "PLexer",
								  "a", "34", debug);
		assertEquals("34\n", found);
	}

	@Test public void testParserSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : t=('x'|'y') {System.out.println($t.text);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testParserNotSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : t=~('x'|'y') 'z' {System.out.println($t.text);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "zz", debug);
		assertEquals("z\n", found);
	}

	@Test public void testParserNotToken() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : ~'x' 'z' {System.out.println(input);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "zz", debug);
		assertEquals("zz\n", found);
	}

	@Test public void testParserNotTokenWithLabel() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : t=~'x' 'z' {System.out.println($t.text);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "zz", debug);
		assertEquals("z\n", found);
	}

	@Test public void testRuleAsSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a @after {System.out.println(input);} : 'a' | 'b' |'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "b", debug);
		assertEquals("b\n", found);
	}

	@Test public void testRuleAsSetAST() throws Exception {
		String grammar =
			"grammar T;\n" +
			"options {output=AST;}\n" +
			"a : 'a' | 'b' |'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "b", debug);
		assertEquals("b\n", found);
	}

	@Test public void testNotChar() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ~'b' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testOptionalSingleElement() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A? 'c' {System.out.println(input);} ;\n" +
			"A : 'b' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "bc", debug);
		assertEquals("bc\n", found);
	}

	@Test public void testOptionalLexerSingleElement() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : 'b'? 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "bc", debug);
		assertEquals("bc\n", found);
	}

	@Test public void testStarLexerSingleElement() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : 'b'* 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "bbbbc", debug);
		assertEquals("bbbbc\n", found);
		found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "c", debug);
		assertEquals("c\n", found);
	}

	@Test public void testPlusLexerSingleElement() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : 'b'+ 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "bbbbc", debug);
		assertEquals("bbbbc\n", found);
	}

	@Test public void testOptionalSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : ('a'|'b')? 'c' {System.out.println(input);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "ac", debug);
		assertEquals("ac\n", found);
	}

	@Test public void testStarSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : ('a'|'b')* 'c' {System.out.println(input);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "abaac", debug);
		assertEquals("abaac\n", found);
	}

	@Test public void testPlusSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : ('a'|'b')+ 'c' {System.out.println(input);} ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "abaac", debug);
		assertEquals("abaac\n", found);
	}

	@Test public void testLexerOptionalSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : ('a'|'b')? 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "ac", debug);
		assertEquals("ac\n", found);
	}

	@Test public void testLexerStarSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : ('a'|'b')* 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "abaac", debug);
		assertEquals("abaac\n", found);
	}

	@Test public void testLexerPlusSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println(input);} ;\n" +
			"A : ('a'|'b')+ 'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "abaac", debug);
		assertEquals("abaac\n", found);
	}

	@Test public void testNotCharSet() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ~('b'|'c') ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testNotCharSetWithLabel() throws Exception {
		// This doesn't work in lexer yet.
		// Generates: h=input.LA(1); but h is defined as a Token
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : h=~('b'|'c') ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testNotCharSetWithRuleRef() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ~('a'|B) ;\n" +
			"B : 'b' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testNotCharSetWithRuleRef2() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ~('a'|B) ;\n" +
			"B : 'b'|'c' ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testNotCharSetWithRuleRef3() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ('a'|B) ;\n" +
			"fragment\n" +
			"B : ~('a'|'c') ;\n";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

	@Test public void testNotCharSetWithRuleRef4() throws Exception {
		String grammar =
			"grammar T;\n" +
			"a : A {System.out.println($A.text);} ;\n" +
			"A : ('a'|B) ;\n" +
			"fragment\n" +
			"B : ~('a'|C) ;\n" +
			"fragment\n" +
			"C : 'c'|'d' ;\n ";
		String found = execParser("T.g", grammar, "TParser", "TLexer",
								  "a", "x", debug);
		assertEquals("x\n", found);
	}

}
