1 package io.github.reggert.reb4j;
2
3 import static org.hamcrest.CoreMatchers.is;
4 import static org.junit.Assert.assertThat;
5
6 import io.github.reggert.reb4j.CharLiteral;
7 import io.github.reggert.reb4j.Expression;
8 import io.github.reggert.reb4j.Literal;
9 import io.github.reggert.reb4j.Sequence;
10
11 import java.util.HashSet;
12
13 import org.junit.Test;
14
15
16
17 public class SequenceTest
18 {
19
20 @Test
21 public void testSequence()
22 {
23 final CharLiteral a = Literal.literal('a');
24 final CharLiteral b = Literal.literal('b');
25 final CharLiteral c = Literal.literal('c');
26 final CharLiteral d = Literal.literal('d');
27 final CharLiteral e = Literal.literal('e');
28 final CharLiteral f = Literal.literal('f');
29 final Sequence ab = a.andThen(b);
30 final Sequence abc = ab.andThen(c);
31 final Sequence ef = e.andThen(f);
32 final Sequence def = d.andThen(ef);
33 final Sequence abcdef = abc.andThen(def);
34
35 assertThat(ab.toPattern().pattern(), is("ab"));
36 assertThat(abc.toPattern().pattern(), is("abc"));
37 assertThat(ef.toPattern().pattern(), is("ef"));
38 assertThat(def.toPattern().pattern(), is("def"));
39 assertThat(abcdef.toPattern().pattern(), is("abcdef"));
40 }
41
42 @Test
43 public void testSequenceHashcodeEquals()
44 {
45 final CharLiteral a = Literal.literal('a');
46 final CharLiteral b = Literal.literal('b');
47 final CharLiteral c = Literal.literal('c');
48
49 final Sequence ab = a.andThen(b);
50 final Sequence abc1 = ab.andThen(c);
51 final Sequence abc2 = Sequence.sequence(a, b, c);
52 final HashSet<Expression> expressions = new HashSet<Expression>();
53 expressions.add(a);
54 expressions.add(b);
55 expressions.add(c);
56 expressions.add(abc1);
57 assertThat(expressions.size(), is(4));
58 assertThat(expressions.contains(abc1), is(true));
59 assertThat(expressions.contains(abc2), is(true));
60 assertThat(expressions.contains(ab), is(false));
61 assertThat(abc1.equals(abc1), is(true));
62 assertThat(abc1.equals(abc2), is(true));
63 assertThat(abc1.equals(a), is(false));
64 assertThat(abc1.equals(null), is(false));
65 }
66
67 }