1// Copyright 2019 Google LLC 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// https://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. 14package zopflipng 15 16import ( 17 "io/ioutil" 18 "testing" 19) 20 21// TestCompress verifies that ZopfliPng compresses PNGs correctly. 22func TestCompress(t *testing.T) { 23 path := "testdata/zoidberg.png" 24 contents, err := ioutil.ReadFile(path) 25 if err != nil { 26 t.Errorf("Failed to load testdata: %s", path) 27 } 28 compressed, err := Compress(contents) 29 if err != nil { 30 t.Error("ZopfliPNG failed: ", err) 31 } 32 if len(compressed) >= len(contents) { 33 t.Error("ZopfliPNG did not compress png") 34 } 35} 36
