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# Testing Files and Attachments
This test contains instructions for the core team to manually test common attachment types. All files for testing are stored in the [mm_file_testing](https://www.dropbox.com/sh/i7ft8is5hbhk8ii/AAAyM-WG-X2jiQOgg6-E3MmLa?dl=0) dropbox folder. Follow these instructions:
1. Download the entire [mm_file_testing](https://www.dropbox.com/sh/i7ft8is5hbhk8ii/AAAyM-WG-X2jiQOgg6-E3MmLa?dl=0) folder.
2. Drag and drop each file type into Mattermost to upload it.
3. Post the file attachment
**Notes:**
- All file types should upload and post.
- Read the expected for details on the behavior of the thumbnail and preview window.
- The expected behavior of video and audio formats depends on the operating system, browser and plugins. View the permalinks to the Public Test Channel on Pre-Release Core to see the expected cases.
- If the browser can play the media file, media player controls should appear. If the browser cannot play the file, it should show appear as a regular attachment without the media controls.
### Images
**JPG**
`Images/JPG.jpg`
Expected: Scaled thumbnail & preview window
[Permalink](https://pre-release.mattermost.com/core/pl/bgx3wcd9ppdo7fz9zqokofg7sc)
**PNG**
`Images/PNG.png`
Expected: Scaled thumbnail & preview window
[Permalink](https://pre-release.mattermost.com/core/pl/zra4yhm69j8ij81iy5hw7983qe)
**BMP**
`Images/BMP.bmp`
Expected: Scaled thumbnail & preview window
[Permalink](https://pre-release.mattermost.com/core/pl/1hx7x7t1npn4jqyr5rb1qhbj3h)
**GIF**
`Images/GIF.gif`
Expected: Scaled thumbnail & preview window. GIF should auto-play in the preview window.
[Permalink](https://pre-release.mattermost.com/core/pl/j49fowdkstr57g3ed9bgpfoo5w)
**TIFF**
`Images/TIFF.tiff`
Expected: Generic attachment thumbnail & preview window
[Permalink](https://pre-release.mattermost.com/core/pl/6yad4jydaidr3pc3tihp8n8bge)
**PSD**
`Images/PSD.psd`
Expected: Generic attachment thumbnail & preview window
[Permalink](https://pre-release.mattermost.com/core/pl/4kitwk7pi78c9ck4i98f9xnzoe)
### Documents
**PDF Files**
`Documents/PDF.pdf`
Expected: Generic PDF thumbnail. File previewer shows first 5 pages of the PDF.
[Permalink](https://pre-release.mattermost.com/core/pl/o1dg6menetdszrhyxmtoqjfi8h)
**Excel**
`Documents/Excel.xlsx`
Expected: Generic Excel thumbnail & preview window.
[Permalink](https://pre-release.mattermost.com/core/pl/71wwezy3f7drze6ipundscb17y)
**PPT**
`Documents/PPT.pptx`
Expected: Generic Powerpoint thumbnail & preview window.
[Permalink](https://pre-release.mattermost.com/core/pl/mx37h4znwb8f5ffuoajusqhiew)
**Word**
`Documents/Word.docx`
Expected: Generic Word thumbnail & preview window.
[Permalink](https://pre-release.mattermost.com/core/pl/d7s76wp6kjdwfp4hgrwpijsnyy)
### Videos
**MP4**
`Videos/MP4.mp4`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/5dx5qx9t9brqfnhohccxjynx7c)
**AVI**
`Videos/AVI.avi`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/qwn9eiy7j3rkjyruxhcugpogdw)
**MKV**
`Videos/MKV.mkv`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/tszyjkr1cidhxjgiusa4mde3ja)
**MOV**
`Videos/MOV.mov`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/ienzppz5i3f7tbt5jiujn8uuir)
**MPG**
`Videos/MPG.mpg`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/skggdq1hfpritc6c88bi481p5a)
**Webm**
`Videos/WEBM.webm`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/7h8tysuxgfgsxeht3sbn7e4h6y)
**WMV**
`Videos/WMV.wmv`
Expected: Generic video thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/kaom7j7uyjra7bzhrre6qwdrbw)
### Audio
**MP3**
`Audio/MP3.mp3`
Expected: Generic audio thumbnail & playable preview window
[Permalink](https://pre-release.mattermost.com/core/pl/if4gn8dbrjgx8fmqmkukzefyme)
**M4A**
`Audio/M4a.m4a`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/6c7qsw48ybd88bktgeykodsrrc)
**AAC**
`Audio/AAC.aac`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/3naoy5pr5tydbk1m6yo1ast9ny)
**FLAC**
`Audio/FLAC.flac`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/kf4cmy44dfya5efmse7rg43eih)
**OGG**
`Audio/OGG.ogg`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/dezrcpbxapyexe77rjuzkrp63r)
**WAV**
`Audio/WAV.wav`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/pdkxx1udepdnbmi9j8kyas5xbh)
**WMA**
`Audio/WMA.wma`
Expected: Generic audio thumbnail, view Permalink for preview window behavior. Expected depends on the operating system, browser and plugins.
[Permalink](https://pre-release.mattermost.com/core/pl/756wrmdd57dcig3m4emypp6i1h)
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