fix: fix expired? method when expires_in is 0

Author: disep

lib/oauth2/access_token.rb

@@ -81,7 +81,7 @@ def initialize(client, token, opts = {})
       @expires_in &&= @expires_in.to_i
       @expires_at &&= convert_expires_at(@expires_at)
       @expires_latency &&= @expires_latency.to_i
-      @expires_at ||= Time.now.to_i + @expires_in if @expires_in
+      @expires_at ||= Time.now.to_i + @expires_in if @expires_in && !@expires_in.zero?
       @expires_at -= @expires_latency if @expires_latency
       @options = {mode: opts.delete(:mode) || :header,
                   header_format: opts.delete(:header_format) || 'Bearer %s',

spec/oauth2/access_token_spec.rb

@@ -615,6 +615,10 @@ def assert_initialized_token(target)
       expect(described_class.new(client, token)).not_to be_expired
     end
 
+    it 'is false if expires_in is 0 (token is permanent)' do
+      expect(described_class.new(client, token, refresh_token: 'abaca', expires_in: 0)).not_to be_expired
+    end
+
     it 'is false if expires_in is in the future' do
       expect(described_class.new(client, token, refresh_token: 'abaca', expires_in: 10_800)).not_to be_expired
     end