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+Tests for autocommands:
+- FileWritePre writing a compressed file
+- FileReadPost reading a compressed file
+- BufNewFile reading a file template
+- BufReadPre decompressing the file to be read
+- FilterReadPre substituting characters in the temp file
+- FilterReadPost substituting characters after filtering
+- FileReadPre set options for decompression
+- FileReadPost decompress the file
+
+Note: This test will fail if "gzip" is not available.
+$GZIP is made empty, "-v" would cause trouble.
+Use a FileChangedShell autocommand to avoid a prompt for "Xtestfile.gz" being
+modified outside of Vim (noticed on Solaris).
+
+STARTTEST
+:so small.vim
+:let $GZIP = ""
+:au FileChangedShell * echo "caught FileChangedShell"
+:set bin
+:au FileWritePre *.gz '[,']!gzip
+:au FileWritePost *.gz undo
+:/start of testfile/,/end of testfile/w! Xtestfile.gz
+:au FileReadPost *.gz '[,']!gzip -d
+:$r Xtestfile.gz " Read and decompress the testfile
+:?startstart?,$w! test.out " Write contents of this file
+:au BufNewFile *.c read Xtest.c
+gg/^end of testfile
+:/start of test.c/+1,/end of test.c/-1w! Xtest.c
+:e! foo.c " Will load Xtest.c
+:au FileAppendPre *.out '[,']s/new/NEW/
+:au FileAppendPost *.out !cat Xtest.c >>test.out
+:w>>test.out " Append it to the output file
+:au! FileAppendPre
+:" setup autocommands to decompress before reading and re-compress afterwards
+:au BufReadPre *.gz !gzip -d <afile>
+:au BufReadPre *.gz call rename(expand("<afile>:r"), expand("<afile>"))
+:au BufReadPost *.gz call rename(expand("<afile>"), expand("<afile>:r"))
+:au BufReadPost *.gz !gzip <afile>:r
+:e! Xtestfile.gz " Edit compressed file
+:w>>test.out " Append it to the output file
+:au FilterReadPre *.out call rename(expand("<afile>"), expand("<afile>").".t")
+:au FilterReadPre *.out !sed s/e/E/ <afile>.t ><afile>
+:au FilterReadPre *.out !rm <afile>.t
+:au FilterReadPost *.out '[,']s/x/X/g
+:e! test.out " Edit the output file
+:23,$!cat
+:au! FileReadPre *.gz !gzip -d <afile>
+:au FileReadPre *.gz call rename(expand("<afile>:r"), expand("<afile>"))
+:au! FileReadPost *.gz '[,']s/l/L/
+:$r Xtestfile.gz " Read compressed file
+:w " write it, after filtering
+:au! " remove all autocommands
+:e " Edit test.out again
+:set nobin ff& " use the default fileformat for writing
+:w
+:qa!
+ENDTEST
+
+startstart
+start of testfile
+line 2 Abcdefghijklmnopqrstuvwxyz
+line 3 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+line 4 Abcdefghijklmnopqrstuvwxyz
+line 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+line 6 Abcdefghijklmnopqrstuvwxyz
+line 7 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+line 8 Abcdefghijklmnopqrstuvwxyz
+line 9 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+line 10 Abcdefghijklmnopqrstuvwxyz
+end of testfile
+
+start of test.c
+/*
+ * Here is a new .c file
+ */
+end of test.c