Reduce debt

* get up to date with golangci linters
* factorized duplicate code in expander
* split expander into more specialized bits
* More UT with headers
* linting: simplified returned errors
* regenerated bindata with Kevin Burke's go-bindata fork

Signed-off-by: Frederic BIDON <fredbi@yahoo.com>

.golangci.yml

@@ -4,7 +4,7 @@ linters-settings:
   golint:
     min-confidence: 0
   gocyclo:
-    min-complexity: 25
+    min-complexity: 45
   maligned:
     suggest-new: true
   dupl:

auth_test.go

@@ -40,21 +40,24 @@ func TestSerialization_AuthSerialization(t *testing.T) {
 	assertSerializeJSON(
 		t,
 		OAuth2AccessToken("http://foo.com/authorization", "http://foo.com/token"),
-		`{"type":"oauth2","flow":"accessCode","authorizationUrl":"http://foo.com/authorization","tokenUrl":"http://foo.com/token"}`)
+		`{"type":"oauth2","flow":"accessCode","authorizationUrl":"http://foo.com/authorization",`+
+			`"tokenUrl":"http://foo.com/token"}`)
 
 	auth1 := OAuth2Implicit("http://foo.com/authorization")
 	auth1.AddScope("email", "read your email")
 	assertSerializeJSON(
 		t,
 		auth1,
-		`{"type":"oauth2","flow":"implicit","authorizationUrl":"http://foo.com/authorization","scopes":{"email":"read your email"}}`)
+		`{"type":"oauth2","flow":"implicit","authorizationUrl":"http://foo.com/authorization",`+
+			`"scopes":{"email":"read your email"}}`)
 
 	auth2 := OAuth2Password("http://foo.com/authorization")
 	auth2.AddScope("email", "read your email")
 	assertSerializeJSON(
 		t,
 		auth2,
-		`{"type":"oauth2","flow":"password","tokenUrl":"http://foo.com/authorization","scopes":{"email":"read your email"}}`)
+		`{"type":"oauth2","flow":"password","tokenUrl":"http://foo.com/authorization",`+
+			`"scopes":{"email":"read your email"}}`)
 
 	auth3 := OAuth2Application("http://foo.com/token")
 	auth3.AddScope("email", "read your email")
@@ -68,7 +71,8 @@ func TestSerialization_AuthSerialization(t *testing.T) {
 	assertSerializeJSON(
 		t,
 		auth4,
-		`{"type":"oauth2","flow":"accessCode","authorizationUrl":"http://foo.com/authorization","tokenUrl":"http://foo.com/token","scopes":{"email":"read your email"}}`)
+		`{"type":"oauth2","flow":"accessCode","authorizationUrl":"http://foo.com/authorization",`+
+			`"tokenUrl":"http://foo.com/token","scopes":{"email":"read your email"}}`)
 }
 
 func TestSerialization_AuthDeserialization(t *testing.T) {
@@ -97,13 +101,15 @@ func TestSerialization_AuthDeserialization(t *testing.T) {
 
 	assertParsesJSON(
 		t,
-		`{"authorizationUrl":"http://foo.com/authorization","flow":"accessCode","tokenUrl":"http://foo.com/token","type":"oauth2"}`,
+		`{"authorizationUrl":"http://foo.com/authorization","flow":"accessCode","tokenUrl":"http://foo.com/token",`+
+			`"type":"oauth2"}`,
 		OAuth2AccessToken("http://foo.com/authorization", "http://foo.com/token"))
 
 	auth1 := OAuth2Implicit("http://foo.com/authorization")
 	auth1.AddScope("email", "read your email")
 	assertParsesJSON(t,
-		`{"authorizationUrl":"http://foo.com/authorization","flow":"implicit","scopes":{"email":"read your email"},"type":"oauth2"}`,
+		`{"authorizationUrl":"http://foo.com/authorization","flow":"implicit","scopes":{"email":"read your email"},`+
+			`"type":"oauth2"}`,
 		auth1)
 
 	auth2 := OAuth2Password("http://foo.com/token")
@@ -122,7 +128,8 @@ func TestSerialization_AuthDeserialization(t *testing.T) {
 	auth4.AddScope("email", "read your email")
 	assertParsesJSON(
 		t,
-		`{"authorizationUrl":"http://foo.com/authorization","flow":"accessCode","scopes":{"email":"read your email"},"tokenUrl":"http://foo.com/token","type":"oauth2"}`,
+		`{"authorizationUrl":"http://foo.com/authorization","flow":"accessCode","scopes":{"email":"read your email"},`+
+			`"tokenUrl":"http://foo.com/token","type":"oauth2"}`,
 		auth4)
 
 }

cache.go

@@ -0,0 +1,60 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package spec
+
+import "sync"
+
+// ResolutionCache a cache for resolving urls
+type ResolutionCache interface {
+	Get(string) (interface{}, bool)
+	Set(string, interface{})
+}
+
+type simpleCache struct {
+	lock  sync.RWMutex
+	store map[string]interface{}
+}
+
+// Get retrieves a cached URI
+func (s *simpleCache) Get(uri string) (interface{}, bool) {
+	debugLog("getting %q from resolution cache", uri)
+	s.lock.RLock()
+	v, ok := s.store[uri]
+	debugLog("got %q from resolution cache: %t", uri, ok)
+
+	s.lock.RUnlock()
+	return v, ok
+}
+
+// Set caches a URI
+func (s *simpleCache) Set(uri string, data interface{}) {
+	s.lock.Lock()
+	s.store[uri] = data
+	s.lock.Unlock()
+}
+
+var resCache ResolutionCache
+
+func init() {
+	resCache = initResolutionCache()
+}
+
+// initResolutionCache initializes the URI resolution cache
+func initResolutionCache() ResolutionCache {
+	return &simpleCache{store: map[string]interface{}{
+		"http://swagger.io/v2/schema.json":       MustLoadSwagger20Schema(),
+		"http://json-schema.org/draft-04/schema": MustLoadJSONSchemaDraft04(),
+	}}
+}

debug.go

@@ -24,9 +24,9 @@ import (
 
 var (
 	// Debug is true when the SWAGGER_DEBUG env var is not empty.
-	// It enables a more verbose logging of validators.
+	// It enables a more verbose logging of this package.
 	Debug = os.Getenv("SWAGGER_DEBUG") != ""
-	// validateLogger is a debug logger for this package
+	// specLogger is a debug logger for this package
 	specLogger *log.Logger
 )