@Test(expected = calculator.SyntaxErrorException.class)
public void testThrow() {
Lexer lex = new Lexer("m");
try {
lex.next();
} catch (SyntaxErrorException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Test
public void testNext() throws SyntaxErrorException {
String s0 = "3.14234";
Lexer lex0 = new Lexer(s0);
assertEquals(new Lexer.Token(Type.NUM, "3.14234").toString(), lex0.next().toString());
assertEquals(new Lexer.Token(Type.EOF, "").toString(), lex0.next().toString());
String s1 = "in";
Lexer lex1 = new Lexer(s1);
assertEquals(new Lexer.Token(Type.UNIT, "in").toString(), lex1.next().toString());
assertEquals(new Lexer.Token(Type.EOF, "").toString(), lex1.next().toString());
String s2 = "4.5354 pts 3";
Lexer lex2 = new Lexer(s2);
assertEquals(new Lexer.Token(Type.NUM, "4.5354").toString(), lex2.next().toString());
assertEquals(new Lexer.Token(Type.UNIT, "pts").toString(), lex2.next().toString());
assertEquals(new Lexer.Token(Type.NUM, "3").toString(), lex2.next().toString());
assertEquals(new Lexer.Token(Type.EOF, "").toString(), lex2.next().toString());
String s3 = "5 / 3pts";
Lexer lex3 = new Lexer(s3);
assertEquals(new Lexer.Token(Type.NUM, "5").toString(), lex3.next().toString());
assertEquals(new Lexer.Token(Type.OP, "/").toString(), lex3.next().toString());
assertEquals(new Lexer.Token(Type.NUM, "3").toString(), lex3.next().toString());
assertEquals(new Lexer.Token(Type.UNIT, "pts").toString(), lex3.next().toString());
assertEquals(new Lexer.Token(Type.EOF, "").toString(), lex3.next().toString());
String s4 = "((5+3pts)/4in)";
Lexer lex4 = new Lexer(s4);
assertEquals(new Lexer.Token(Type.PAREN, "(").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.PAREN, "(").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.NUM, "5").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.OP, "+").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.NUM, "3").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.UNIT, "pts").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.PAREN, ")").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.OP, "/").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.NUM, "4").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.UNIT, "in").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.PAREN, ")").toString(), lex4.next().toString());
assertEquals(new Lexer.Token(Type.EOF, "").toString(), lex4.next().toString());
// should throw exception
}