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Add regression test for antlr/antlr4#19 (getter for context is not a list when it should be)

This commit is contained in:
Sam Harwell 2012-10-25 17:57:44 -05:00
parent 514a1500ea
commit bfc395d23b
1 changed files with 25 additions and 0 deletions
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25
tool/test/org/antlr/v4/test/TestParseErrors.java
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@ -271,6 +271,31 @@ public class TestParseErrors extends BaseTest {
assertEquals("line 1:0 missing ID at '<EOF>'\n", this.stderrDuringParse);
}
/**
* Regression test for "Getter for context is not a list when it should be".
* https://github.com/antlr/antlr4/issues/19
*/
@Test
public void testContextListGetters() throws Exception {
String grammar =
"grammar T;\n" +
"@parser::members{\n" +
" void foo() {\n" +
" SContext s = null;\n" +
" List<? extends AContext> a = s.a();\n" +
" List<? extends BContext> b = s.b();\n" +
" }\n" +
"}\n" +
"s : (a | b)+;\n" +
"a : 'a' {System.out.print('a');};\n" +
"b : 'b' {System.out.print('b');};\n" +
"";
String result = execParser("T.g", grammar, "TParser", "TLexer", "s", "abab", true);
String expecting = "abab\n";
assertEquals(expecting, result);
assertNull(this.stderrDuringParse);
}
/**
* This is a regression test for #45 "NullPointerException in ATNConfig.hashCode".
* https://github.com/antlr/antlr4/issues/45