github.com/olivere/camlistore@v0.0.0-20140121221811-1b7ac2da0199/pkg/magic/magic_test.go (about)

     1  /*
     2  Copyright 2011 Google Inc.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  nYou may obtain a copy of the License at
     7  
     8       http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package magic
    18  
    19  import (
    20  	"io/ioutil"
    21  	"testing"
    22  
    23  	. "camlistore.org/pkg/test/asserts"
    24  )
    25  
    26  type magicTest struct {
    27  	fileName, data string // one of these set
    28  	want           string
    29  }
    30  
    31  var tests = []magicTest{
    32  	{fileName: "smile.jpg", want: "image/jpeg"},
    33  	{fileName: "smile.png", want: "image/png"},
    34  	{data: "<html>foo</html>", want: "text/html"},
    35  	{data: "\xff", want: ""},
    36  }
    37  
    38  func TestMagic(t *testing.T) {
    39  	for i, tt := range tests {
    40  		var err error
    41  		data := []byte(tt.data)
    42  		if tt.fileName != "" {
    43  			data, err = ioutil.ReadFile("testdata/" + tt.fileName)
    44  			AssertNil(t, err, "no error reading "+tt.fileName)
    45  		}
    46  		mime := MIMEType(data)
    47  		if mime != tt.want {
    48  			t.Errorf("%d. got %q; want %q", i, mime, tt.want)
    49  		}
    50  	}
    51  }