zig/test/incremental/change_embed_file

#exe {
-Mroot=main.zig
#}

#write main.zig {
const std = @import("std");
const string = @embedFile("string.txt");
pub fn main() !void {
    try std.Io.File.stdout().writeStreamingAll(io, string);
}
const io = std.Io.Threaded.global_single_threaded.io();
#}
#write string.txt {
Hello, World!
#}
#update
#check stdout {
Hello, World!
#}

#write string.txt {
Hello again, World!
#}
#update {
change file contents#}
#check stdout {
Hello again, World!
#}

#delete string.txt
#update {
delete file#}
#check errors {
main.zig:2:27: error: failed opening "string.txt": FileNotFound
#}

#write main.zig {
const std = @import("std");
const string = @embedFile("string.txt");
pub fn main() !void {
    try std.Io.File.stdout().writeStreamingAll(io, "a hardcoded string\n");
}
const io = std.Io.Threaded.global_single_threaded.io();
#}
#update {
remove reference to file#}
#check stdout {
a hardcoded string
#}

#write main.zig {
const std = @import("std");
const string = @embedFile("string.txt");
pub fn main() !void {
    try std.Io.File.stdout().writeStreamingAll(io, string);
}
const io = std.Io.Threaded.global_single_threaded.io();
#}
#update {
re-introduce reference to file#}
#check errors {
main.zig:2:27: error: failed opening "string.txt": FileNotFound
#}

#write string.txt {
We're back, World!
#}
#update {
recreate file#}
#check stdout {
We're back, World!
#}