Address pull request feedback

python_terraform/__init__.py

@@ -339,7 +339,8 @@ class Terraform(object):
         full_value = kwargs.pop('full_value', False)
         name_provided = (len(args) > 0)
         kwargs['json'] = IsFlagged
-        kwargs['capture_output'] = True
+        if not kwargs.get('capture_output', True) is True:
+          raise ValueError('capture_output is required for this method')
 
         ret, out, err = self.output_cmd(*args, **kwargs)
 

test/test_terraform.py

@@ -35,8 +35,9 @@ CMD_CASES = [
     [
         [
             lambda x: x.cmd('plan', 'var_to_output', no_color=IsFlagged, var={'test_var': 'test'}) ,
-            ["doesn't need to do anything",
-             "no\nactions need to be performed"],
+            # Expected output varies by terraform version
+            ["doesn't need to do anything",               # Terraform < 0.10.7 (used in travis env)
+                "no\nactions need to be performed"],      # Terraform >= 0.10.7
             0,
             False,
             '',