fix(libnpmexec): don't detach output from npm

The npm output function refers to this.log. libnpmexec has that passed in, which decoupled the function from the npm object. This fixes it, and sets the tests up in a way where if the output function ever becomes detached from this.npm in the same way, tests will fail.
npm · May 28, 2021 · 996248c · 996248c
1 parent 685f4be
commit 996248c
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Showing 6 changed files with 61 additions and 48 deletions.
diff --git a/lib/exec.js b/lib/exec.js
@@ -76,8 +76,8 @@ class Exec extends BaseCommand {
       localBin,
       log,
       globalBin,
-      output,
     } = this.npm
+    const output = (...outputArgs) => this.npm.output(...outputArgs)
     const scriptShell = this.npm.config.get('script-shell') || undefined
     const packages = this.npm.config.get('package')
     const yes = this.npm.config.get('yes')

diff --git a/lib/init.js b/lib/init.js
@@ -113,8 +113,8 @@ class Init extends BaseCommand {
       localBin,
       log,
       globalBin,
-      output,
     } = this.npm
+    const output = (...outputArgs) => this.npm.output(...outputArgs)
     const locationMsg = await getLocationMsg({ color, path })
     const runPath = path
     const scriptShell = this.npm.config.get('script-shell') || undefined

diff --git a/tap-snapshots/test/lib/init.js.test.cjs b/tap-snapshots/test/lib/init.js.test.cjs
@@ -6,13 +6,13 @@
  */
 'use strict'
 exports[`test/lib/init.js TAP workspaces no args > should print helper info 1`] = `
-
+Array []
 `
 
 exports[`test/lib/init.js TAP workspaces no args, existing folder > should print helper info 1`] = `
-
+Array []
 `
 
 exports[`test/lib/init.js TAP workspaces with arg but missing workspace folder > should print helper info 1`] = `
-
+Array []
 `
diff --git a/test/fixtures/mock-npm.js b/test/fixtures/mock-npm.js
@@ -4,35 +4,54 @@
 
 const realConfig = require('../../lib/utils/config')
 
-const mockLog = {
-  clearProgress: () => {},
-  disableProgress: () => {},
-  enableProgress: () => {},
-  http: () => {},
-  info: () => {},
-  levels: [],
-  notice: () => {},
-  pause: () => {},
-  silly: () => {},
-  verbose: () => {},
-  warn: () => {},
-}
-const mockNpm = (base = {}) => {
-  const config = base.config || {}
-  const flatOptions = base.flatOptions || {}
-  return {
-    log: mockLog,
-    ...base,
-    flatOptions,
-    config: {
+class MockNpm {
+  constructor (base = {}) {
+    this._mockOutputs = []
+    this.isMockNpm = true
+    this.base = base
+
+    const config = base.config || {}
+
+    for (const attr in base) {
+      if (attr !== 'config') {
+        this[attr] = base[attr]
+      }
+    }
+
+    this.flatOptions = base.flatOptions || {}
+    this.config = {
       // for now just set `find` to what config.find should return
       // this works cause `find` is not an existing config entry
       find: (k) => ({...realConfig.defaults, ...config})[k],
       get: (k) => ({...realConfig.defaults, ...config})[k],
       set: (k, v) => config[k] = v,
       list: [{ ...realConfig.defaults, ...config}]
-    },
+    }
+    if (!this.log) {
+      this.log = {
+        clearProgress: () => {},
+        disableProgress: () => {},
+        enableProgress: () => {},
+        http: () => {},
+        info: () => {},
+        levels: [],
+        notice: () => {},
+        pause: () => {},
+        silly: () => {},
+        verbose: () => {},
+        warn: () => {},
+      }
+    }
+  }
+
+  output(...msg) {
+    if (this.base.output)
+      return this.base.output(msg)
+    this._mockOutputs.push(msg)
   }
 }
 
-module.exports = mockNpm
+// TODO export MockNpm, and change tests to use new MockNpm()
+module.exports = (base = {}) => {
+  return new MockNpm(base)
+}
diff --git a/test/lib/exec.js b/test/lib/exec.js
@@ -1,8 +1,6 @@
 const t = require('tap')
 const mockNpm = require('../fixtures/mock-npm')
 const { resolve, delimiter } = require('path')
-const OUTPUT = []
-const output = (...msg) => OUTPUT.push(msg)
 
 const ARB_CTOR = []
 const ARB_ACTUAL_TREE = {}
@@ -36,6 +34,7 @@ const config = {
   package: [],
   'script-shell': 'shell-cmd',
 }
+
 const npm = mockNpm({
   flatOptions,
   config,
@@ -53,7 +52,6 @@ const npm = mockNpm({
       LOG_WARN.push(args)
     },
   },
-  output,
 })
 
 const RUN_SCRIPTS = []
@@ -225,7 +223,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
     ARB_CTOR.length = 0
     MKDIRPS.length = 0
     ARB_REIFY.length = 0
-    OUTPUT.length = 0
+    npm._mockOutputs.length = 0
     exec.exec([], er => {
       if (er)
         throw er
@@ -256,7 +254,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
     process.stdin.isTTY = true
     run(t, true, () => {
       t.strictSame(LOG_WARN, [])
-      t.strictSame(OUTPUT, [
+      t.strictSame(npm._mockOutputs, [
         [`\nEntering npm script environment at location:\n${process.cwd()}\nType 'exit' or ^D when finished\n`],
       ], 'printed message about interactive shell')
       t.end()
@@ -270,7 +268,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
 
     run(t, true, () => {
       t.strictSame(LOG_WARN, [])
-      t.strictSame(OUTPUT, [
+      t.strictSame(npm._mockOutputs, [
         [`\u001b[0m\u001b[0m\n\u001b[0mEntering npm script environment\u001b[0m\u001b[0m at location:\u001b[0m\n\u001b[0m\u001b[2m${process.cwd()}\u001b[22m\u001b[0m\u001b[1m\u001b[22m\n\u001b[1mType 'exit' or ^D when finished\u001b[22m\n\u001b[1m\u001b[22m`],
       ], 'printed message about interactive shell')
       t.end()
@@ -282,7 +280,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
     process.stdin.isTTY = false
     run(t, true, () => {
       t.strictSame(LOG_WARN, [])
-      t.strictSame(OUTPUT, [], 'no message about interactive shell')
+      t.strictSame(npm._mockOutputs, [], 'no message about interactive shell')
       t.end()
     })
   })
@@ -294,7 +292,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
       t.strictSame(LOG_WARN, [
         ['exec', 'Interactive mode disabled in CI environment'],
       ])
-      t.strictSame(OUTPUT, [], 'no message about interactive shell')
+      t.strictSame(npm._mockOutputs, [], 'no message about interactive shell')
       t.end()
     })
   })
@@ -316,7 +314,7 @@ t.test('npm exec <noargs>, run interactive shell', t => {
       ARB_CTOR.length = 0
       MKDIRPS.length = 0
       ARB_REIFY.length = 0
-      OUTPUT.length = 0
+      npm._mockOutputs.length = 0
       RUN_SCRIPTS.length = 0
       t.end()
     })
@@ -1195,22 +1193,22 @@ t.test('workspaces', t => {
           return rej(er)
 
         t.strictSame(LOG_WARN, [])
-        t.strictSame(OUTPUT, [
+        t.strictSame(npm._mockOutputs, [
           [`\nEntering npm script environment in workspace a@1.0.0 at location:\n${resolve(npm.localPrefix, 'packages/a')}\nType 'exit' or ^D when finished\n`],
         ], 'printed message about interactive shell')
         res()
       })
     })
 
     config.color = true
-    OUTPUT.length = 0
+    npm._mockOutputs.length = 0
     await new Promise((res, rej) => {
       exec.execWorkspaces([], ['a'], er => {
         if (er)
           return rej(er)
 
         t.strictSame(LOG_WARN, [])
-        t.strictSame(OUTPUT, [
+        t.strictSame(npm._mockOutputs, [
           [`\u001b[0m\u001b[0m\n\u001b[0mEntering npm script environment\u001b[0m\u001b[0m in workspace \u001b[32ma@1.0.0\u001b[39m at location:\u001b[0m\n\u001b[0m\u001b[2m${resolve(npm.localPrefix, 'packages/a')}\u001b[22m\u001b[0m\u001b[1m\u001b[22m\n\u001b[1mType 'exit' or ^D when finished\u001b[22m\n\u001b[1m\u001b[22m`],
         ], 'printed message about interactive shell')
         res()

diff --git a/test/lib/init.js b/test/lib/init.js
@@ -3,7 +3,6 @@ const { resolve } = require('path')
 const t = require('tap')
 const mockNpm = require('../fixtures/mock-npm')
 
-let result = ''
 const npmLog = {
   disableProgress: () => null,
   enableProgress: () => null,
@@ -19,9 +18,6 @@ const config = {
 const npm = mockNpm({
   config,
   log: npmLog,
-  output: (...msg) => {
-    result += msg.join('\n')
-  },
 })
 const mocks = {
   '../../lib/utils/usage.js': () => 'usage instructions',
@@ -33,11 +29,11 @@ const _consolelog = console.log
 const noop = () => {}
 
 t.afterEach(() => {
-  result = ''
   config.yes = true
   config.package = undefined
   npm.log = npmLog
   process.chdir(_cwd)
+  npm._mockOutputs.length = 0
   console.log = _consolelog
 })
 
@@ -340,7 +336,7 @@ t.test('workspaces', t => {
       if (err)
         throw err
 
-      t.matchSnapshot(result, 'should print helper info')
+      t.matchSnapshot(npm._mockOutputs, 'should print helper info')
       t.end()
     })
   })
@@ -369,7 +365,7 @@ t.test('workspaces', t => {
       if (err)
         throw err
 
-      t.matchSnapshot(result, 'should print helper info')
+      t.matchSnapshot(npm._mockOutputs, 'should print helper info')
       t.end()
     })
   })
@@ -401,7 +397,7 @@ t.test('workspaces', t => {
       if (err)
         throw err
 
-      t.matchSnapshot(result, 'should print helper info')
+      t.matchSnapshot(npm._mockOutputs, 'should print helper info')
       t.end()
     })
   })