1 files changed, 34 insertions, 0 deletions
diff --git a/test/lib/utils/config/flatten.js b/test/lib/utils/config/flatten.js
new file mode 100644
index 000000000..9fac0820c
--- /dev/null
+++ b/test/lib/utils/config/flatten.js
@@ -0,0 +1,34 @@
+const t = require('tap')
+const flatten = require('../../../../lib/utils/config/flatten.js')
+
+require.main.filename = '/path/to/npm'
+delete process.env.NODE
+process.execPath = '/path/to/node'
+
+const obj = {
+  'save-dev': true,
+  '@foobar:registry': 'https://foo.bar.com/',
+  '//foo.bar.com:_authToken': 'foobarbazquuxasdf',
+  userconfig: '/path/to/.npmrc',
+}
+
+const flat = flatten(obj)
+t.strictSame(flat, {
+  saveType: 'dev',
+  '@foobar:registry': 'https://foo.bar.com/',
+  '//foo.bar.com:_authToken': 'foobarbazquuxasdf',
+  npmBin: '/path/to/npm',
+  nodeBin: '/path/to/node',
+  hashAlgorithm: 'sha1',
+})
+
+// now flatten something else on top of it.
+process.env.NODE = '/usr/local/bin/node.exe'
+flatten({ 'save-dev': false }, flat)
+t.strictSame(flat, {
+  '@foobar:registry': 'https://foo.bar.com/',
+  '//foo.bar.com:_authToken': 'foobarbazquuxasdf',
+  npmBin: '/path/to/npm',
+  nodeBin: '/usr/local/bin/node.exe',
+  hashAlgorithm: 'sha1',
+})