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#include <assert.h>
#include <stdio.h>
#include <emscripten.h>
int main() {
EM_ASM(
var ex;
// write a file that should be unaffected by this process
FS.writeFile('/safe.txt', 'abc');
// mount it the first time
FS.mkdir('/working');
FS.mount(MEMFS, {}, '/working');
FS.writeFile('/working/waka.txt', 'az');
// mount to a missing directory
try {
FS.mount(MEMFS, {}, '/missing');
} catch (e) {
ex = e;
}
assert(ex instanceof FS.ErrnoError && ex.errno === ERRNO_CODES.ENOENT);
// mount to an existing mountpoint
try {
FS.mount(MEMFS, {}, '/working');
} catch (e) {
ex = e;
}
assert(ex instanceof FS.ErrnoError && ex.errno === ERRNO_CODES.EBUSY);
// unmount
FS.unmount('/working');
// unmount something that's not mounted
try {
FS.unmount('/working');
} catch (e) {
ex = e;
}
assert(ex instanceof FS.ErrnoError && ex.errno === ERRNO_CODES.EINVAL);
// try to read the file from the old mount
try {
FS.readFile('/working/waka.txt', { encoding: 'utf8' });
} catch (e) {
ex = e;
}
assert(ex instanceof FS.ErrnoError && ex.errno === ERRNO_CODES.ENOENT);
// check the safe file
var contents = FS.readFile('/safe.txt', { encoding: 'utf8' });
assert(contents === 'abc');
);
puts("success");
return 0;
}
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