snapshot of https://github.com/mattermost/mattermost.git (master, 2026-09-16; blobs > 131072B omitted)

server/tests/test-attachments.md

@@ -0,0 +1,148 @@
+# 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://drive.google.com/drive/folders/0B9-SWBTtyOCBRlEyaW1IdkZ4X1k) Drive folder. Follow these instructions:
+
+1. Download the entire [mm_file_testing](https://drive.google.com/drive/folders/0B9-SWBTtyOCBRlEyaW1IdkZ4X1k) folder. 
+2. Drag and drop each file type into Mattermost to upload it (upload some as multiple attachments on the same post)
+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  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)
+
+**Text**  
+`Documents/Text.txt`  
+Expected: Generic code thumbnail & file previewer.
+[Permalink](https://pre-release.mattermost.com/core/pl/cpw539wcxtdmzeh5ju71y73o4e)
+
+### 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)