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node_modules/node-gyp/test/test-find-node-directory.js

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+'use strict'
+
+const test = require('tap').test
+const path = require('path')
+const findNodeDirectory = require('../lib/find-node-directory')
+
+const platforms = ['darwin', 'freebsd', 'linux', 'sunos', 'win32', 'aix']
+
+// we should find the directory based on the directory
+// the script is running in and it should match the layout
+// in a build tree where npm is installed in
+// .... /deps/npm
+test('test find-node-directory - node install', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj = { execPath: '/x/y/bin/node', platform: platforms[next] }
+    t.equal(
+      findNodeDirectory('/x/deps/npm/node_modules/node-gyp/lib', processObj),
+      path.join('/x'))
+  }
+})
+
+// we should find the directory based on the directory
+// the script is running in and it should match the layout
+// in an installed tree where npm is installed in
+// .... /lib/node_modules/npm or .../node_modules/npm
+// depending on the patform
+test('test find-node-directory - node build', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj = { execPath: '/x/y/bin/node', platform: platforms[next] }
+    if (platforms[next] === 'win32') {
+      t.equal(
+        findNodeDirectory('/y/node_modules/npm/node_modules/node-gyp/lib',
+          processObj), path.join('/y'))
+    } else {
+      t.equal(
+        findNodeDirectory('/y/lib/node_modules/npm/node_modules/node-gyp/lib',
+          processObj), path.join('/y'))
+    }
+  }
+})
+
+// we should find the directory based on the execPath
+// for node and match because it was in the bin directory
+test('test find-node-directory - node in bin directory', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj = { execPath: '/x/y/bin/node', platform: platforms[next] }
+    t.equal(
+      findNodeDirectory('/nothere/npm/node_modules/node-gyp/lib', processObj),
+      path.join('/x/y'))
+  }
+})
+
+// we should find the directory based on the execPath
+// for node and match because it was in the Release directory
+test('test find-node-directory - node in build release dir', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj
+    if (platforms[next] === 'win32') {
+      processObj = { execPath: '/x/y/Release/node', platform: platforms[next] }
+    } else {
+      processObj = {
+        execPath: '/x/y/out/Release/node',
+        platform: platforms[next]
+      }
+    }
+
+    t.equal(
+      findNodeDirectory('/nothere/npm/node_modules/node-gyp/lib', processObj),
+      path.join('/x/y'))
+  }
+})
+
+// we should find the directory based on the execPath
+// for node and match because it was in the Debug directory
+test('test find-node-directory - node in Debug release dir', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj
+    if (platforms[next] === 'win32') {
+      processObj = { execPath: '/a/b/Debug/node', platform: platforms[next] }
+    } else {
+      processObj = { execPath: '/a/b/out/Debug/node', platform: platforms[next] }
+    }
+
+    t.equal(
+      findNodeDirectory('/nothere/npm/node_modules/node-gyp/lib', processObj),
+      path.join('/a/b'))
+  }
+})
+
+// we should not find it as it will not match based on the execPath nor
+// the directory from which the script is running
+test('test find-node-directory - not found', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj = { execPath: '/x/y/z/y', platform: next }
+    t.equal(findNodeDirectory('/a/b/c/d', processObj), '')
+  }
+})
+
+// we should find the directory based on the directory
+// the script is running in and it should match the layout
+// in a build tree where npm is installed in
+// .... /deps/npm
+// same test as above but make sure additional directory entries
+// don't cause an issue
+test('test find-node-directory - node install', function (t) {
+  t.plan(platforms.length)
+  for (var next = 0; next < platforms.length; next++) {
+    var processObj = { execPath: '/x/y/bin/node', platform: platforms[next] }
+    t.equal(
+      findNodeDirectory('/x/y/z/a/b/c/deps/npm/node_modules/node-gyp/lib',
+        processObj), path.join('/x/y/z/a/b/c'))
+  }
+})