Add test in npm state.

Updated nmp module to append --dry-run when executing nmp state in test mode.

Fixes #30250.

salt/modules/npm.py

@@ -66,7 +66,8 @@ def install(pkg=None,
             runas=None,
             registry=None,
             env=None,
-            silent=True):
+            silent=True,
+            dry_run=False):
     '''
     Install an NPM package.
 
@@ -107,6 +108,11 @@ def install(pkg=None,
 
         .. versionadded::2015.9.0
 
+    dry_run
+        Wether or not to run NPM install with --dry-run flag.
+
+        .. versionadded::2015.8.4
+
     CLI Example:
 
     .. code-block:: bash
@@ -138,6 +144,9 @@ def install(pkg=None,
     if registry:
         cmd.append(' --registry="{0}"'.format(registry))
 
+    if dry_run:
+        cmd.append('--dry-run')
+
     if pkg:
         cmd.append(pkg)
     elif pkgs:

salt/states/npm.py

@@ -274,6 +274,18 @@ def bootstrap(name,
     '''
     ret = {'name': name, 'result': None, 'comment': '', 'changes': {}}
 
+    if __opts__['test']:
+        try:
+            call = __salt__['npm.install'](dir=name, runas=user, pkg=None, dry_run=True)
+        except (CommandNotFoundError, CommandExecutionError) as err:
+            ret['result'] = False
+            ret['comment'] = 'Error Bootstrapping {0!r}: {1}'.format(name, err)
+            return ret
+        ret['result'] = None
+        ret['changes'] = {'old': [], 'new': call}
+        ret['comment'] = '{0} is set to be bootstrapped'.format(name)
+        return ret
+
     try:
         call = __salt__['npm.install'](dir=name, runas=user, pkg=None)
     except (CommandNotFoundError, CommandExecutionError) as err:
@@ -289,6 +301,7 @@ def bootstrap(name,
     # npm.install will return a string if it can't parse a JSON result
     if isinstance(call, str):
         ret['result'] = False
+        ret['changes'] = call
         ret['comment'] = 'Could not bootstrap directory'
     else:
         ret['result'] = True

tests/unit/states/npm_test.py

@@ -22,7 +22,7 @@ ensure_in_syspath('../../')
 from salt.states import npm
 
 npm.__salt__ = {}
-npm.__opts__ = {}
+npm.__opts__ = {'test': False}
 
 
 @skipIf(NO_MOCK, NO_MOCK_REASON)