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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.parser.Parser;
import org.junit.Test;
import static org.junit.Assert.*;
public class ParserTest {
@Test public void testDeferredFragments() {
// The for update is scanned before the body, then parsed after it.
// Delimiters in strings, characters and comments must not end the scan.
String[] updates = {"n=n+\") (\"#", "n=n+')'", "n=n+/* ) */2", "n=n+{ -> 2; }()"};
String[] results = {"6", "82", "4", "4"};
for( int i = 0; i<updates.length; i++ ) {
CodeGen code = new CodeGen("int n=0; for(int i=0; i<2; "+updates[i]+") i++; return n;")
.driver(CodeGen.Phase.TypeCheck);
assertEquals(updates[i],results[i],Eval2.eval(code,0));
}
// Declared constructor bodies use the same scanner with brace nesting.
CodeGen code = new CodeGen("struct Box { int x; new Box={ -> x=\"}\"#; }; }; return new Box().x;")
.driver(CodeGen.Phase.TypeCheck);
assertEquals("1",Eval2.eval(code,0));
}
@Test public void testUnclosedDeferredFragment() {
try {
new CodeGen("for(int i=0; i<2; i++").driver(CodeGen.Phase.TypeCheck);
fail("Accepted an unterminated for update");
} catch( Parser.ParseException e ) {
assertEquals("Unclosed for update",e.getMessage());
}
}
}
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