### Question:
SqlCommentScrubber { public static String removeComments( String text ) { if ( text == null ) { return null; } StringBuilder queryWithoutComments = new StringBuilder(); boolean blkComment = false; boolean lineComment = false; boolean inString = false; StringReader buffer = new StringReader( text ); int ch; char currentStringChar = (char) QUOTE_CHARS[0]; boolean done = false; try { while ( !done ) { switch ( ch = buffer.read() ) { case EOF: { done = true; break; } case '\'': case '"': { if ( !lineComment && !blkComment ) { char cch = (char) ch; if ( inString ) { if ( currentStringChar == cch ) { inString = false; } } else { inString = true; currentStringChar = cch; } queryWithoutComments.append( cch ); } break; } case '/': { if ( !lineComment ) { ch = buffer.read(); if ( ( ch == '*' ) && ( !blkComment ) && ( !inString ) ) { ch = buffer.read(); if ( ch == '+' ) { queryWithoutComments.append( '/' ); queryWithoutComments.append( '*' ); queryWithoutComments.append( '+' ); } else { blkComment = true; } } else { if ( !blkComment ) { queryWithoutComments.append( '/' ); queryWithoutComments.append( (char) ch ); if ( inString && ( currentStringChar == (char) ch ) ) { inString = false; } } } } break; } case '*': { if ( blkComment ) { ch = buffer.read(); if ( ch == '/' ) { blkComment = false; } } else { if ( !lineComment ) { queryWithoutComments.append( '*' ); } } break; } case '-': { if ( !blkComment && !lineComment ) { ch = buffer.read(); if ( ch == '-' && !inString ) { lineComment = true; } else { queryWithoutComments.append( '-' ); queryWithoutComments.append( (char) ch ); if ( isQuoteChar( ch ) ) { char cch = (char) ch; if ( inString ) { if ( currentStringChar == cch ) { inString = false; } } else { inString = true; currentStringChar = cch; } } } } break; } case EOL: { if ( !blkComment && !lineComment ) { queryWithoutComments.append( (char) ch ); } lineComment = false; break; } default: { if ( !blkComment && !lineComment ) { queryWithoutComments.append( (char) ch ); } break; } } } } catch ( IOException e ) { } return queryWithoutComments.toString(); } private  SqlCommentScrubber(); static String removeComments( String text ); static final int EOF; static final int EOL; }### Answer:
@Test public void testRemoveComments() throws Exception { Assert.assertEquals( expected, SqlCommentScrubber.removeComments( input ) ); }