@Test
public void forwardAssertion1() {
String[] rules = {
"ROOT = 'a' ~ /\\b/", //
};
Grammar g = new Grammar(rules);
assertNotNull(g.matches("a").match());
g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("a").match());
}
@Test
public void cycle() {
String[] rules = {
"ROOT = 'a' | <ROOT> 'b'", //
};
Grammar g = new Grammar(rules);
assertNotNull(g.matches("ab").match());
String s = g.describe();
g = new Grammar(s);
assertNotNull(g.matches("ab").match());
}
@Test
public void literal() {
String[] rules = {
"ROOT = 'a'", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("a").match());
}
@Test
public void backreference() {
String[] rules = {
"ROOT = 'a' 'b' 1", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("aba").match());
}
@Test
public void tag() {
String[] rules = {
"ROOT = [{foo} 'a']", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("a").match().first("foo"));
}
@Test
public void alternation() {
String[] rules = {
"ROOT = 'a' | 'b'", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("b").match());
}
@Test
public void regex() {
String[] rules = {
"ROOT = /a/i", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("A").match());
}
@Test
public void negativeForwardAssertion2() {
String[] rules = {
"ROOT = 'a' !+ /\\B/", //
};
Grammar g = new Grammar(new Grammar(rules).describe());
assertNotNull(g.matches("a").match());
}