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Merge pull request #391 from cosmos/fabo/fs-mock
Fabo/fs mock
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -7,3 +7,4 @@ npm-debug.log | |
| npm-debug.log.* | ||
| thumbs.db | ||
| !.gitkeep | ||
| .vscode | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| const { Writable } = require('stream') | ||
| const { normalize, sep } = require('path') | ||
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| /* | ||
| * this mock implements every function (all used in this project for now) in fs-extra so that the file system is just represented by a json file holding file content as strings | ||
| */ | ||
| export default function mockFsExtra (fileSystem = {}) { | ||
| const fsExtraMock = { | ||
| copy: (from, to) => { | ||
| let {file} = get(from, fsExtraMock.fs) | ||
| if (file === null) { | ||
| throwENOENT(from) | ||
| } | ||
| create(to, fsExtraMock.fs, file) | ||
| }, | ||
| ensureFile: (path) => { | ||
| let {file} = get(path, fsExtraMock.fs) | ||
| if (file === null) { | ||
| create(path, fsExtraMock.fs) | ||
| } | ||
| }, | ||
| ensureDir: (path) => { | ||
| let {file} = get(path, fsExtraMock.fs) | ||
| if (file === null) { | ||
| create(path, fsExtraMock.fs) | ||
| } | ||
| }, | ||
| createWriteStream: () => new Writable(), | ||
| // for simplicity we say if there is a file we can access it | ||
| access: (path) => { | ||
| let {file} = get(path, fsExtraMock.fs) | ||
| if (file === null) { | ||
| throwENOENT(path) | ||
| return false | ||
| } | ||
| return !!get(path, fsExtraMock.fs).file | ||
| }, | ||
| remove: (path) => { | ||
| let {parent, name} = get(path, fsExtraMock.fs) | ||
| delete parent[name] | ||
| }, | ||
| readFile: (path) => { | ||
| let {file} = get(path, fsExtraMock.fs) | ||
| if (!file) { | ||
| throwENOENT(path) | ||
| } | ||
| return file | ||
| }, | ||
| writeFile: (path, file) => create(path, fsExtraMock.fs, file), | ||
| pathExists: (path) => !!get(path, fsExtraMock.fs).file, | ||
| exists: (path) => { | ||
| let {file} = get(path, fsExtraMock.fs) | ||
| return file !== null | ||
| } | ||
| } | ||
|
|
||
| // all methods are synchronous in tests | ||
| Object.keys(fsExtraMock).forEach(key => { | ||
| fsExtraMock[key + 'Sync'] = fsExtraMock[key] | ||
| }) | ||
|
|
||
| // for debugging | ||
| fsExtraMock.MOCKED = true | ||
| fsExtraMock.fs = fileSystem | ||
|
|
||
| // strip long content from fs | ||
| function fsToString (fs) { | ||
| // clone | ||
| fs = JSON.parse(JSON.stringify(fs)) | ||
| Object.keys(fs).forEach(key => { | ||
| if (typeof fs[key] === 'object') { | ||
| fs[key] = fsToString(fs[key]) | ||
| } else { | ||
| fs[key] = '#CONTENT#' | ||
| } | ||
| }) | ||
| return fs | ||
| } | ||
|
|
||
| function throwENOENT (path) { | ||
| let error = new Error('Path ' + path + ' doesnt exist.\nFS:' + JSON.stringify(fsToString(fileSystem), null, 2)) | ||
| error.code = 'ENOENT' | ||
| throw error | ||
| } | ||
|
|
||
| function get (path, fs) { | ||
| path = normalize(path) | ||
| let pathArr = path.split(sep).filter(x => x !== '') | ||
| let current = pathArr.shift() | ||
|
|
||
| if (fs[current]) { | ||
| if (pathArr.length === 0) { | ||
| return { | ||
| file: fs[current], | ||
| name: current, | ||
| parent: fs | ||
| } | ||
| } | ||
| return get(pathArr.join('/'), fs[current]) | ||
| } | ||
| return { | ||
| file: null, | ||
| name: current, | ||
| parent: fs | ||
| } | ||
| } | ||
|
|
||
| function create (path, fs, file = {}) { | ||
| path = normalize(path) | ||
| let pathArr = path.split(sep).filter(x => x !== '') | ||
| let current = pathArr.shift() | ||
|
|
||
| if (!fs[current]) { | ||
| fs[current] = {} | ||
| } | ||
| if (pathArr.length === 0) { | ||
| if (typeof file === 'object') { | ||
| // clone object | ||
| fs[current] = JSON.parse(JSON.stringify(file)) | ||
| } else { | ||
| fs[current] = file | ||
| } | ||
| return true | ||
| } | ||
| return create(pathArr.join('/'), fs[current], file) | ||
| } | ||
|
|
||
| return fsExtraMock | ||
| } |
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