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var path = require('path');
var is = require('is');
var Buffer = require('buffer').Buffer;
var Immutable = require('immutable');
var FS = require('../models/fs');
var error = require('../utils/error');
/**
Create a fake filesystem for unit testing GitBook.
@param {Map<String:String|Map>}
*/
function createMockFS(files) {
files = Immutable.fromJS(files);
var mtime = new Date();
function getFile(filePath) {
var parts = path.normalize(filePath).split(path.sep);
return parts.reduce(function(list, part, i) {
if (!list) return null;
var file;
if (!part || part === '.') file = list;
else file = list.get(part);
if (!file) return null;
if (is.string(file)) {
if (i === (parts.length - 1)) return file;
else return null;
}
return file;
}, files);
}
function fsExists(filePath) {
return Boolean(getFile(filePath) !== null);
}
function fsReadFile(filePath) {
var file = getFile(filePath);
if (!is.string(file)) {
throw error.FileNotFoundError({
filename: filePath
});
}
return new Buffer(file, 'utf8');
}
function fsStatFile(filePath) {
var file = getFile(filePath);
if (!file) {
throw error.FileNotFoundError({
filename: filePath
});
}
return {
mtime: mtime
};
}
function fsReadDir(filePath) {
var dir = getFile(filePath);
if (!dir || is.string(dir)) {
throw error.FileNotFoundError({
filename: filePath
});
}
return dir
.map(function(content, name) {
if (!is.string(content)) {
name = name + '/';
}
return name;
})
.valueSeq();
}
return FS.create({
root: '',
fsExists: fsExists,
fsReadFile: fsReadFile,
fsStatFile: fsStatFile,
fsReadDir: fsReadDir
});
}
module.exports = createMockFS;
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