1//  Copyright (c) 2017 Couchbase, Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// 		http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package vellum
16
17import "testing"
18
19func TestCommonInputs(t *testing.T) {
20
21	// first ensure items that can be encoded round trip properly
22	for i := 0; i < 256; i++ {
23		roundTrip(t, byte(i))
24	}
25
26	// G maps to 62, +1 is 63, which is highest 6-bit value we can encode
27	enc := encodeCommon('G')
28	if enc != 63 {
29		t.Errorf("expected G to encode to 63, got %d", enc)
30	}
31
32	// W encodes to 63, +1 is 64, which is too big to fit
33	enc = encodeCommon('W')
34	if enc != 0 {
35		t.Errorf("expected W to encode to 0, got %d", enc)
36	}
37}
38
39func roundTrip(t *testing.T, b byte) {
40	enc := encodeCommon(b)
41	if enc > 0 {
42		dec := decodeCommon(enc)
43		if dec != b {
44			t.Errorf("error round trip common input: %d", b)
45		}
46	}
47}
48