# should support the -update flag

unquote in.txt res.txt

# Should be an error to use -u with only stdin
stdin in.txt
! testscript -u
stderr 'cannot use -u when reading from stdin'

# It is ok to use -u when reading from stdin and
# a regular file
testscript -u - in.txt
cmp in.txt res.txt

-- in.txt --
>exec printf 'hello\n'
>cmp stdout stdout.txt
>
>-- .gomodproxy/fruit.com_v1.0.0/.mod --
>module fruit.com
>
>-- .gomodproxy/fruit.com_v1.0.0/.info --
>{"Version":"v1.0.0","Time":"2018-10-22T18:45:39Z"}
>
>-- .gomodproxy/fruit.com_v1.0.0/go.mod --
>module fruit.com
>
>-- stdout.txt --
>goodbye
>-- .gomodproxy/fruit.com_v1.0.0/fruit/fruit.go --
>package fruit
>
>const Apple = "apple"
>-- .gomodproxy/fruit.com_v1.0.0/coretest/coretest.go --
>// package coretest becomes a candidate for the missing
>// core import in main above
>package coretest
>
>const Mandarin = "mandarin"
-- res.txt --
>exec printf 'hello\n'
>cmp stdout stdout.txt
>
>-- .gomodproxy/fruit.com_v1.0.0/.mod --
>module fruit.com
>
>-- .gomodproxy/fruit.com_v1.0.0/.info --
>{"Version":"v1.0.0","Time":"2018-10-22T18:45:39Z"}
>
>-- .gomodproxy/fruit.com_v1.0.0/go.mod --
>module fruit.com
>
>-- stdout.txt --
>hello
>-- .gomodproxy/fruit.com_v1.0.0/fruit/fruit.go --
>package fruit
>
>const Apple = "apple"
>-- .gomodproxy/fruit.com_v1.0.0/coretest/coretest.go --
>// package coretest becomes a candidate for the missing
>// core import in main above
>package coretest
>
>const Mandarin = "mandarin"