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let mocklib = global.mocklib; // ucode-lsp disable
return {
readfile: function(path, limit) {
/* Check captured content first (from mock writefile) */
if (mocklib.has_captured(path)) {
mocklib.trace_call("fs", "readfile", { path, limit, source: "captured" });
let data = mocklib.read_captured(path);
return limit ? substr(data, 0, limit) : data;
}
let file = sprintf("fs/open~%s.txt", replace(path, /[^A-Za-z0-9_-]+/g, '_')),
mock = mocklib.read_data_file(file);
if (mock == null) {
/* Silently return null for missing fixtures */
return null;
}
mocklib.trace_call("fs", "readfile", { path, limit });
return limit ? substr(mock, 0, limit) : mock;
},
writefile: function(path, data) {
mocklib.capture(path, data);
mocklib.trace_call("fs", "writefile", { path, length: length(data) });
return length(data);
},
popen: (cmdline, mode) => {
let read = (!mode || index(mode, "r") != -1),
path = sprintf("fs/popen~%s.txt", replace(cmdline, /[^A-Za-z0-9_-]+/g, '_')),
mock = mocklib.read_data_file(path);
if (read && mock == null) {
/* Silently return empty-read handle for missing fixtures */
return {
read: function(amount) { return ''; },
write: function() {},
close: function() {},
error: function() { return null; }
};
}
mocklib.trace_call("fs", "popen", { cmdline, mode });
return {
read: function(amount) {
let rv;
switch (amount) {
case "all":
rv = mock;
mock = "";
break;
case "line":
let i = index(mock, "\n");
i = (i > -1) ? i + 1 : length(mock);
rv = substr(mock, 0, i);
mock = substr(mock, i);
break;
default:
let n = +amount;
n = (n > 0) ? n : 0;
rv = substr(mock, 0, n);
mock = substr(mock, n);
break;
}
return rv;
},
write: function() {},
close: function() {},
error: function() {
return null;
}
};
},
stat: function(path) {
/* Check captured content first */
if (mocklib.has_captured(path)) {
mocklib.trace_call("fs", "stat", { path, source: "captured" });
return { type: "file" };
}
let file = sprintf("fs/stat~%s.json", replace(path, /[^A-Za-z0-9_-]+/g, '_')),
mock = mocklib.read_json_file(file);
if (!mock || mock != mock) {
/* No fixture: fall back to reasonable defaults */
if (match(path, /\/$/))
mock = { type: "directory" };
else
mock = { type: "file" };
}
mocklib.trace_call("fs", "stat", { path });
return mock;
},
glob: function(pattern) {
mocklib.trace_call("fs", "glob", { pattern });
/* Return empty array — tests use devices.json fixture directly */
return [];
},
unlink: function(path) {
mocklib.delete_captured(path);
mocklib.trace_call("fs", "unlink", { path });
return true;
},
error: () => "Unspecified error"
};
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