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Add regression tests for #625

This commit is contained in:
Sam Harwell 2014-06-16 12:05:10 -05:00
parent 8f08802716
commit 9cbf473195
1 changed files with 47 additions and 0 deletions
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47
tool/test/org/antlr/v4/test/TestLeftRecursion.java
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@ -568,6 +568,53 @@ public class TestLeftRecursion extends BaseTest {
assertEquals("(prog (statement (letterA a)) (statement (letterA a)) <EOF>)\n", found);
}
/**
* This is a regression test for antlr/antlr4#625 "Duplicate action breaks
* operator precedence"
* https://github.com/antlr/antlr4/issues/625
*/
@Test public void testMultipleActions() throws Exception {
String grammar =
"grammar T;\n" +
"s @after {System.out.println($ctx.toStringTree(this));} : e ;\n" +
"e : a=e op=('*'|'/') b=e {}{}\n" +
" | INT {}{}\n" +
" | '(' x=e ')' {}{}\n" +
" ;\n" +
"INT : '0'..'9'+ ;\n" +
"WS : (' '|'\\n') -> skip ;\n";
String[] tests = {
"4", "(s (e 4))",
"1*2/3", "(s (e (e (e 1) * (e 2)) / (e 3)))",
"(1/2)*3", "(s (e (e ( (e (e 1) / (e 2)) )) * (e 3)))",
};
runTests(grammar, tests, "s");
}
/**
* This is a regression test for antlr/antlr4#625 "Duplicate action breaks
* operator precedence"
* https://github.com/antlr/antlr4/issues/625
*/
@Test public void testMultipleActionsPredicatesOptions() throws Exception {
String grammar =
"grammar T;\n" +
"s @after {System.out.println($ctx.toStringTree(this));} : e ;\n" +
"e : a=e op=('*'|'/') b=e {}{true}?\n" +
" | a=e op=('+'|'-') b=e {}<p=3>{true}?<fail='Message'>\n" +
" | INT {}{}\n" +
" | '(' x=e ')' {}{}\n" +
" ;\n" +
"INT : '0'..'9'+ ;\n" +
"WS : (' '|'\\n') -> skip ;\n";
String[] tests = {
"4", "(s (e 4))",
"1*2/3", "(s (e (e (e 1) * (e 2)) / (e 3)))",
"(1/2)*3", "(s (e (e ( (e (e 1) / (e 2)) )) * (e 3)))",
};
runTests(grammar, tests, "s");
}
public void runTests(String grammar, String[] tests, String startRule) {
rawGenerateAndBuildRecognizer("T.g4", grammar, "TParser", "TLexer");
writeRecognizerAndCompile("TParser",