zig/test/incremental/change_module

#exe {
--dep foo -Mroot=main.zig
-Mfoo=foo.zig
#}

#write main.zig {
pub fn main() void {
    _ = @import("foo");
    //_ = @import("other.zig");
}
#}
#write foo.zig {
comptime {
    _ = @import("other.zig");
}
#}
#write other.zig {
fn f() void {
    @compileLog(@src().module);
}
comptime {
    f();
}
#}
#update
#check errors {
other.zig:2:5: error: found compile log statement

Compile Log Output:
@as([:0]const u8, "foo"[0..3])
#}

#write main.zig {
pub fn main() void {
    _ = @import("foo");
    _ = @import("other.zig");
}
#}
#write foo.zig {
comptime {
    //_ = @import("other.zig");
}
#}
#update "change module of other.zig"
#check errors {
other.zig:2:5: error: found compile log statement

Compile Log Output:
@as([:0]const u8, "root"[0..4])
#}

#write main.zig {
pub fn main() void {
    _ = @import("foo");
    _ = @import("other.zig");
}
#}
#write foo.zig {
comptime {
    _ = @import("other.zig");
}
#}
#update "put other.zig in both modules"
#check errors {
other.zig:1:1: error: file exists in modules 'root' and 'foo'
other.zig:1:1: note: files must belong to only one module
main.zig:3:17: note: file is imported here by the root of module 'root'
foo.zig:2:17: note: file is imported here by the root of module 'foo'
#}

#write main.zig {
pub fn main() void {
    _ = @import("foo");
    //_ = @import("other.zig");
}
#}
#write foo.zig {
comptime {
    //_ = @import("other.zig");
}
#}
#update "put other.zig in no modules"
#check stdout