/*
[The "BSD licence"]
Copyright (c) 2005-2006 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.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CharStream;
import org.antlr.runtime.TokenRewriteStream;
import org.antlr.tool.Grammar;
import org.antlr.tool.Interpreter;
public class TestTokenRewriteStream extends BaseTest {
/** Public default constructor used by TestRig */
public TestTokenRewriteStream() {
}
public void testInsertBeforeIndex0() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(0, "0");
String result = tokens.toString();
String expecting = "0abc";
assertEquals(expecting, result);
}
public void testInsertAfterLastIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertAfter(2, "x");
String result = tokens.toString();
String expecting = "abcx";
assertEquals(expecting, result);
}
public void test2InsertBeforeAfterMiddleIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "x");
tokens.insertAfter(1, "x");
String result = tokens.toString();
String expecting = "axbxc";
assertEquals(expecting, result);
}
public void testReplaceIndex0() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(0, "x");
String result = tokens.toString();
String expecting = "xbc";
assertEquals(expecting, result);
}
public void testReplaceLastIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, "x");
String result = tokens.toString();
String expecting = "abx";
assertEquals(expecting, result);
}
public void testReplaceMiddleIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, "x");
String result = tokens.toString();
String expecting = "axc";
assertEquals(expecting, result);
}
public void testToStringStartStop() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"MUL : '*';\n" +
"ASSIGN : '=';\n" +
"WS : ' '+;\n");
// Tokens: 0123456789
// Input: x = 3 * 0;
CharStream input = new ANTLRStringStream("x = 3 * 0;");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(4, 8, "0"); // replace 3 * 0 with 0
String result = tokens.toOriginalString();
String expecting = "x = 3 * 0;";
assertEquals(expecting, result);
result = tokens.toString();
expecting = "x = 0;";
assertEquals(expecting, result);
result = tokens.toString(0,9);
expecting = "x = 0;";
assertEquals(expecting, result);
result = tokens.toString(4,8);
expecting = "0";
assertEquals(expecting, result);
}
public void testToStringStartStop2() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"ASSIGN : '=';\n" +
"PLUS : '+';\n" +
"MULT : '*';\n" +
"WS : ' '+;\n");
// Tokens: 012345678901234567
// Input: x = 3 * 0 + 2 * 0;
CharStream input = new ANTLRStringStream("x = 3 * 0 + 2 * 0;");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
String result = tokens.toOriginalString();
String expecting = "x = 3 * 0 + 2 * 0;";
assertEquals(expecting, result);
tokens.replace(4, 8, "0"); // replace 3 * 0 with 0
result = tokens.toString();
expecting = "x = 0 + 2 * 0;";
assertEquals(expecting, result);
result = tokens.toString(0,17);
expecting = "x = 0 + 2 * 0;";
assertEquals(expecting, result);
result = tokens.toString(4,8);
expecting = "0";
assertEquals(expecting, result);
result = tokens.toString(0,8);
expecting = "x = 0";
assertEquals(expecting, result);
result = tokens.toString(12,16);
expecting = "2 * 0";
assertEquals(expecting, result);
tokens.insertAfter(17, "// comment");
result = tokens.toString(12,17);
expecting = "2 * 0;// comment";
assertEquals(expecting, result);
result = tokens.toString(0,8); // try again after insert at end
expecting = "x = 0";
assertEquals(expecting, result);
}
public void test2ReplaceMiddleIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, "x");
tokens.replace(1, "y");
String result = tokens.toString();
String expecting = "ayc";
assertEquals(expecting, result);
}
public void test2ReplaceMiddleIndex1InsertBefore() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(0, "_");
tokens.replace(1, "x");
tokens.replace(1, "y");
String result = tokens.toString();
String expecting = "_ayc";
assertEquals(expecting, result);
}
public void testReplaceThenDeleteMiddleIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, "x");
tokens.delete(1);
String result = tokens.toString();
String expecting = "ac";
assertEquals(expecting, result);
}
public void testInsertInPriorReplace() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(0, 2, "x");
tokens.insertBefore(1, "0");
Exception exc = null;
try {
tokens.toString();
}
catch (IllegalArgumentException iae) {
exc = iae;
}
String expecting = "insert op <InsertBeforeOp@1:\"0\"> within boundaries of previous <ReplaceOp@0..2:\"x\">";
assertNotNull(exc);
assertEquals(expecting, exc.getMessage());
}
public void testInsertThenReplaceSameIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(0, "0");
tokens.replace(0, "x"); // supercedes insert at 0
String result = tokens.toString();
String expecting = "xbc";
assertEquals(expecting, result);
}
public void test2InsertMiddleIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "x");
tokens.insertBefore(1, "y");
String result = tokens.toString();
String expecting = "ayxbc";
assertEquals(expecting, result);
}
public void test2InsertThenReplaceIndex0() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(0, "x");
tokens.insertBefore(0, "y");
tokens.replace(0, "z");
String result = tokens.toString();
String expecting = "zbc";
assertEquals(expecting, result);
}
public void testReplaceThenInsertBeforeLastIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, "x");
tokens.insertBefore(2, "y");
String result = tokens.toString();
String expecting = "abyx";
assertEquals(expecting, result);
}
public void testInsertThenReplaceLastIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(2, "y");
tokens.replace(2, "x");
String result = tokens.toString();
String expecting = "abx";
assertEquals(expecting, result);
}
public void testReplaceThenInsertAfterLastIndex() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, "x");
tokens.insertAfter(2, "y");
String result = tokens.toString();
String expecting = "abxy";
assertEquals(expecting, result);
}
public void testReplaceRangeThenInsertAtLeftEdge() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "x");
tokens.insertBefore(2, "y");
String result = tokens.toString();
String expecting = "abyxba";
assertEquals(expecting, result);
}
public void testReplaceRangeThenInsertAtRightEdge() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "x");
tokens.insertBefore(4, "y"); // no effect; within range of a replace
Exception exc = null;
try {
tokens.toString();
}
catch (IllegalArgumentException iae) {
exc = iae;
}
String expecting = "insert op <InsertBeforeOp@4:\"y\"> within boundaries of previous <ReplaceOp@2..4:\"x\">";
assertNotNull(exc);
assertEquals(expecting, exc.getMessage());
}
public void testReplaceRangeThenInsertAfterRightEdge() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "x");
tokens.insertAfter(4, "y");
String result = tokens.toString();
String expecting = "abxyba";
assertEquals(expecting, result);
}
public void testReplaceAll() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(0, 6, "x");
String result = tokens.toString();
String expecting = "x";
assertEquals(expecting, result);
}
public void testReplaceSubsetThenFetch() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "xyz");
String result = tokens.toString(0,6);
String expecting = "abxyzba";
assertEquals(expecting, result);
}
public void testReplaceThenReplaceSuperset() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "xyz");
tokens.replace(3, 5, "foo"); // overlaps, error
Exception exc = null;
try {
tokens.toString();
}
catch (IllegalArgumentException iae) {
exc = iae;
}
String expecting = "replace op boundaries of <ReplaceOp@3..5:\"foo\"> overlap with previous <ReplaceOp@2..4:\"xyz\">";
assertNotNull(exc);
assertEquals(expecting, exc.getMessage());
}
public void testReplaceThenReplaceLowerIndexedSuperset() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 4, "xyz");
tokens.replace(1, 3, "foo"); // overlap, error
Exception exc = null;
try {
tokens.toString();
}
catch (IllegalArgumentException iae) {
exc = iae;
}
String expecting = "replace op boundaries of <ReplaceOp@1..3:\"foo\"> overlap with previous <ReplaceOp@2..4:\"xyz\">";
assertNotNull(exc);
assertEquals(expecting, exc.getMessage());
}
public void testReplaceSingleMiddleThenOverlappingSuperset() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 2, "xyz");
tokens.replace(0, 3, "foo");
String result = tokens.toString();
String expecting = "fooa";
assertEquals(expecting, result);
}
// June 2, 2008 I rewrote core of rewrite engine; just adding lots more tests here
public void testCombineInserts() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(0, "x");
tokens.insertBefore(0, "y");
String result = tokens.toString();
String expecting = "yxabc";
assertEquals(expecting, result);
}
public void testCombine3Inserts() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "x");
tokens.insertBefore(0, "y");
tokens.insertBefore(1, "z");
String result = tokens.toString();
String expecting = "yazxbc";
assertEquals(expecting, result);
}
public void testCombineInsertOnLeftWithReplace() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(0, 2, "foo");
tokens.insertBefore(0, "z"); // combine with left edge of rewrite
String result = tokens.toString();
String expecting = "zfoo";
assertEquals(expecting, result);
}
public void testCombineInsertOnLeftWithDelete() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.delete(0, 2);
tokens.insertBefore(0, "z"); // combine with left edge of rewrite
String result = tokens.toString();
String expecting = "z"; // make sure combo is not znull
assertEquals(expecting, result);
}
public void testDisjointInserts() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "x");
tokens.insertBefore(2, "y");
tokens.insertBefore(0, "z");
String result = tokens.toString();
String expecting = "zaxbyc";
assertEquals(expecting, result);
}
public void testOverlappingReplace() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, 2, "foo");
tokens.replace(0, 3, "bar"); // wipes prior nested replace
String result = tokens.toString();
String expecting = "bar";
assertEquals(expecting, result);
}
public void testOverlappingReplace2() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(0, 3, "bar");
tokens.replace(1, 2, "foo"); // cannot split earlier replace
Exception exc = null;
try {
tokens.toString();
}
catch (IllegalArgumentException iae) {
exc = iae;
}
String expecting = "replace op boundaries of <ReplaceOp@1..2:\"foo\"> overlap with previous <ReplaceOp@0..3:\"bar\">";
assertNotNull(exc);
assertEquals(expecting, exc.getMessage());
}
public void testOverlappingReplace3() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, 2, "foo");
tokens.replace(0, 2, "bar"); // wipes prior nested replace
String result = tokens.toString();
String expecting = "barc";
assertEquals(expecting, result);
}
public void testOverlappingReplace4() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, 2, "foo");
tokens.replace(1, 3, "bar"); // wipes prior nested replace
String result = tokens.toString();
String expecting = "abar";
assertEquals(expecting, result);
}
public void testDropIdenticalReplace() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(1, 2, "foo");
tokens.replace(1, 2, "foo"); // drop previous, identical
String result = tokens.toString();
String expecting = "afooc";
assertEquals(expecting, result);
}
public void testDropPrevCoveredInsert() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "foo");
tokens.replace(1, 2, "foo"); // kill prev insert
String result = tokens.toString();
String expecting = "afooc";
assertEquals(expecting, result);
}
public void testLeaveAloneDisjointInsert() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.insertBefore(1, "x");
tokens.replace(2, 3, "foo");
String result = tokens.toString();
String expecting = "axbfoo";
assertEquals(expecting, result);
}
public void testLeaveAloneDisjointInsert2() throws Exception {
Grammar g = new Grammar(
"lexer grammar t;\n"+
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
CharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.LT(1); // fill buffer
tokens.replace(2, 3, "foo");
tokens.insertBefore(1, "x");
String result = tokens.toString();
String expecting = "axbfoo";
assertEquals(expecting, result);
}
}