Add feature file for thin_restore.

features/thin_restore.feature

@@ -0,0 +1,42 @@
+Feature: thin_restore
+  Scenario: print version (-V flag)
+    When I run thin_restore with -V
+    Then it should pass with version
+
+  Scenario: print version (--version flag)
+    When I run thin_restore with --version
+    Then it should pass with version
+
+  Scenario: print help (-h)
+    When I run thin_restore with -h
+    Then it should pass with:
+
+    """
+    Usage: thin_restore [options]
+    Options:
+      {-h|--help}
+      {-i|--input} <input xml file>
+      {-o|--output} <output device or file>
+      {-V|--version}
+    """
+
+  Scenario: print help (--help)
+    When I run thin_restore with -h
+    Then it should pass with:
+
+    """
+    Usage: thin_restore [options]
+    Options:
+      {-h|--help}
+      {-i|--input} <input xml file>
+      {-o|--output} <output device or file>
+      {-V|--version}
+    """
+
+  @announce
+  Scenario: missing input file
+    When I run thin_restore with -o metadata.bin
+    Then it should fail with:
+    """
+    No input file provided.
+    """