From c10f286804d08c4871270cd6df3e4ffac75e4c8c Mon Sep 17 00:00:00 2001
From: Gareth Chapman <garethchapman@notonthehighstreet.com>
Date: Thu, 4 Feb 2016 13:31:10 +0000
Subject: [PATCH] Adding failure-capture information to exception message.

---
 .gitignore                         | 1 +
 lib/svelte/errors/version_error.rb | 8 +++++++-
 lib/svelte/swagger_builder.rb      | 5 +++--
 spec/lib/svelte_spec.rb            | 2 +-
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/.gitignore b/.gitignore
index 72098d4..a930a41 100755
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 /tmp/
 .tags
 .DS_Store
+/.idea/
diff --git a/lib/svelte/errors/version_error.rb b/lib/svelte/errors/version_error.rb
index 2cf5d32..73a4f0b 100644
--- a/lib/svelte/errors/version_error.rb
+++ b/lib/svelte/errors/version_error.rb
@@ -2,8 +2,14 @@ module Svelte
   # Svelte error class to represent version errors.
   # Raised when a Swagger v1 JSON is fed into Svelte
   class VersionError < StandardError
+
+    def initialize(supplied_version)
+      @supplied_version = supplied_version
+    end
+
     def message
-      'Invalid Swagger version spec supplied. Svelte supports Swagger v2 only'
+      %-"swagger" field is #{@supplied_version or 'empty'}. Svelte only supports Swagger v2.0.-
     end
+
   end
 end
diff --git a/lib/svelte/swagger_builder.rb b/lib/svelte/swagger_builder.rb
index bf73579..1496d8e 100755
--- a/lib/svelte/swagger_builder.rb
+++ b/lib/svelte/swagger_builder.rb
@@ -68,8 +68,9 @@ def validate
     end
 
     def validate_version
-      if raw_hash['swagger'] != '2.0'
-        raise VersionError
+      swagger_version = raw_hash['swagger']
+      if swagger_version != '2.0'
+        raise VersionError.new(swagger_version)
       end
     end
 
diff --git a/spec/lib/svelte_spec.rb b/spec/lib/svelte_spec.rb
index 9883fc2..1b0c596 100755
--- a/spec/lib/svelte_spec.rb
+++ b/spec/lib/svelte_spec.rb
@@ -148,7 +148,7 @@
       it 'raises a VersionError exception' do
         expect { described_class.create(json: json, module_name: module_name) }
           .to raise_error(Svelte::VersionError,
-                          'Invalid Swagger version spec supplied. Svelte supports Swagger v2 only')
+                          '"swagger" field is empty. Svelte only supports Swagger v2.0.')
       end
     end
   end