func TestStack(t *testing.T) {
tests := []struct {
str string
ok bool
}{
{"()", true},
{"()()", true},
{"(())", true},
{"())(", false},
{"(())()", true},
{")(", false},
}
for _, test := range tests {
t.Logf("Running test on %s", test.str)
p := &parens{}
s := New(p)
b := lex.Buffer{
Taker: s,
Lex: trie.New("trie", "(", ")"),
}
n, err := b.Read([]byte(test.str))
if err == nil {
err = b.Close()
}
if test.ok {
if n != len(test.str) || err != nil {
t.Fatalf("expected no error on %s: %d read, error %s", test.str, n, err)
}
if len(s.Stack) != 1 {
t.Fatalf("expected stack size one on %s, got %d", test.str, len(s.Stack))
} else if s.Stack[0].(*parens).String() != test.str {
t.Fatalf("expected parse as %s, got %s", test.str, s.Stack[0].(*parens).String())
}
} else if n == len(test.str) && err == nil {
t.Fatalf("expected error on input %s", test.str)
}
}
}
