[MODULES-2370] file_line.rb: Fix `line` attribute validation

`file_line` type: During validation, do not require `line` attribute if:
* `ensure` is `absent`,
* `match` is not empty,
* and `match_for_absence` is `true`.

Also update `spec` tests to reflect this.

1 files changed, 7 insertions, 2 deletions

diff --git a/lib/puppet/type/file_line.rb b/lib/puppet/type/file_line.rb
index 77d3be2..f2c6937 100644
--- a/lib/puppet/type/file_line.rb
+++ b/lib/puppet/type/file_line.rb
@@ -111,8 +111,13 @@ Puppet::Type.newtype(:file_line) do
   end
 
   validate do
-    unless self[:line] and self[:path]
-      raise(Puppet::Error, "Both line and path are required attributes")
+    unless self[:line]
+      unless (self[:ensure].to_s == 'absent') and (self[:match_for_absence].to_s == 'true') and self[:match]
+        raise(Puppet::Error, "line is a required attribute")
+      end
+    end
+    unless self[:path]
+      raise(Puppet::Error, "path is a required attribute")
     end
   end
 end