doc: document for npm install-test

PR-URL: #9443

doc/cli/npm-install-test.md

@@ -0,0 +1,25 @@
+# npm install-test(1) -- Install package(s) and run tests
+
+## SYNOPSIS
+
+    npm install-test (with no args, in package dir)
+    npm install-test [<@scope>/]<name>
+    npm install-test [<@scope>/]<name>@<tag>
+    npm install-test [<@scope>/]<name>@<version>
+    npm install-test [<@scope>/]<name>@<version range>
+    npm install-test <tarball file>
+    npm install-test <tarball url>
+    npm install-test <folder>
+
+    alias: npm it
+    common options: [--save|--save-dev|--save-optional] [--save-exact] [--dry-run]
+
+## DESCRIPTION
+
+This command runs an `npm install` followed immediately by an `npm test`. It
+takes exactly the same arguments as `npm install`.
+
+## SEE ALSO
+
+- npm-install(1)
+- npm-test(1)