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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      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  * You 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 com.android.emailcommon.utility;
     18 
     19 import com.android.emailcommon.provider.EmailContent;
     20 
     21 import android.net.Uri;
     22 import android.test.AndroidTestCase;
     23 
     24 import java.io.File;
     25 
     26 public class AttachmentUtilitiesTests extends AndroidTestCase {
     27     /**
     28      * Test static inferMimeType()
     29      * From the method doc:
     30      *
     31      * <pre>
     32      *                   |---------------------------------------------------------|
     33      *                   |                  E X T E N S I O N                      |
     34      *                   |---------------------------------------------------------|
     35      *                   | .eml        | known(.png) | unknown(.abc) | none        |
     36      * | M |-----------------------------------------------------------------------|
     37      * | I | none        | msg/rfc822  | image/png   | app/abc       | app/oct-str |
     38      * | M |-------------| (always     |             |               |             |
     39      * | E | app/oct-str |  overrides  |             |               |             |
     40      * | T |-------------|             |             |-----------------------------|
     41      * | Y | text/plain  |             |             | text/plain                  |
     42      * | P |-------------|             |-------------------------------------------|
     43      * | E | any/type    |             | any/type                                  |
     44      * |---|-----------------------------------------------------------------------|
     45      * </pre>
     46      *
     47      * Also, all results should be in lowercase.
     48      */
     49     public void testInferMimeType() {
     50         final String DEFAULT_MIX = "Application/Octet-stream";
     51         final String DEFAULT_LOWER = DEFAULT_MIX.toLowerCase();
     52         final String TEXT_PLAIN = "text/plain";
     53         final String TYPE_IMG_PNG = "image/png";
     54         final String FILE_PNG = "myfile.false.pNg";
     55         final String FILE_ABC = "myfile.false.aBc";
     56         final String FILE_NO_EXT = "myfile";
     57 
     58         // .eml files always override mime type
     59         assertEquals("message/rfc822", AttachmentUtilities.inferMimeType("a.eml", null));
     60         assertEquals("message/rfc822", AttachmentUtilities.inferMimeType("a.eml", ""));
     61         assertEquals("message/rfc822",
     62                 AttachmentUtilities.inferMimeType("a.eml", DEFAULT_LOWER));
     63         assertEquals("message/rfc822",
     64                 AttachmentUtilities.inferMimeType("a.eMl", TEXT_PLAIN));
     65         assertEquals("message/rfc822",
     66                 AttachmentUtilities.inferMimeType("a.eml", TYPE_IMG_PNG));
     67 
     68         // Non-generic, non-empty mime type; return it
     69         assertEquals("mime/type", AttachmentUtilities.inferMimeType(FILE_PNG, "Mime/TyPe"));
     70         assertEquals("mime/type", AttachmentUtilities.inferMimeType(FILE_ABC, "Mime/TyPe"));
     71         assertEquals("mime/type",
     72                 AttachmentUtilities.inferMimeType(FILE_NO_EXT, "Mime/TyPe"));
     73         assertEquals("mime/type", AttachmentUtilities.inferMimeType(null, "Mime/TyPe"));
     74         assertEquals("mime/type", AttachmentUtilities.inferMimeType("", "Mime/TyPe"));
     75 
     76         // Recognizable file extension; return known type
     77         assertEquals("image/png", AttachmentUtilities.inferMimeType(FILE_PNG, null));
     78         assertEquals("image/png", AttachmentUtilities.inferMimeType(FILE_PNG, ""));
     79         assertEquals("image/png", AttachmentUtilities.inferMimeType(FILE_PNG, DEFAULT_MIX));
     80         assertEquals("image/png", AttachmentUtilities.inferMimeType(FILE_PNG, TEXT_PLAIN));
     81 
     82         // Unrecognized and non-empty file extension, non-"text/plain" type; generate mime type
     83         assertEquals("application/abc", AttachmentUtilities.inferMimeType(FILE_ABC, null));
     84         assertEquals("application/abc", AttachmentUtilities.inferMimeType(FILE_ABC, ""));
     85         assertEquals("application/abc",
     86                 AttachmentUtilities.inferMimeType(FILE_ABC, DEFAULT_MIX));
     87 
     88         // Unrecognized and empty file extension, non-"text/plain" type; return "app/octet-stream"
     89         assertEquals(DEFAULT_LOWER, AttachmentUtilities.inferMimeType(FILE_NO_EXT, null));
     90         assertEquals(DEFAULT_LOWER, AttachmentUtilities.inferMimeType(FILE_NO_EXT, ""));
     91         assertEquals(DEFAULT_LOWER,
     92                 AttachmentUtilities.inferMimeType(FILE_NO_EXT, DEFAULT_MIX));
     93         assertEquals(DEFAULT_LOWER, AttachmentUtilities.inferMimeType(null, null));
     94         assertEquals(DEFAULT_LOWER, AttachmentUtilities.inferMimeType("", ""));
     95 
     96         // Unrecognized or empty file extension, "text/plain" type; return "text/plain"
     97         assertEquals(TEXT_PLAIN, AttachmentUtilities.inferMimeType(FILE_ABC, TEXT_PLAIN));
     98         assertEquals(TEXT_PLAIN,
     99                 AttachmentUtilities.inferMimeType(FILE_NO_EXT, TEXT_PLAIN));
    100         assertEquals(TEXT_PLAIN, AttachmentUtilities.inferMimeType(null, TEXT_PLAIN));
    101         assertEquals(TEXT_PLAIN, AttachmentUtilities.inferMimeType("", TEXT_PLAIN));
    102     }
    103 
    104     /**
    105      * Text extension extractor
    106      */
    107     public void testGetFilenameExtension() {
    108         final String FILE_NO_EXTENSION = "myfile";
    109         final String FILE_EXTENSION = "myfile.pDf";
    110         final String FILE_TWO_EXTENSIONS = "myfile.false.AbC";
    111 
    112         assertNull(AttachmentUtilities.getFilenameExtension(null));
    113         assertNull(AttachmentUtilities.getFilenameExtension(""));
    114         assertNull(AttachmentUtilities.getFilenameExtension(FILE_NO_EXTENSION));
    115 
    116         assertEquals("pdf", AttachmentUtilities.getFilenameExtension(FILE_EXTENSION));
    117         assertEquals("abc", AttachmentUtilities.getFilenameExtension(FILE_TWO_EXTENSIONS));
    118 
    119         // The API makes no claim as to how these are handled (it probably should),
    120         // but make sure that they don't crash.
    121         AttachmentUtilities.getFilenameExtension("filename.");
    122         AttachmentUtilities.getFilenameExtension(".extension");
    123     }
    124 }
    125