openapi: Remove cache mechanism

The cache will be removed and replaced with HTTP Etag caching instead.
This patch is simply removing the existing mechanism.

pkg/kubectl/cmd/util/openapi/openapi_getter_test.go

@@ -18,13 +18,83 @@ package openapi_test
 
 import (
 	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
 
+	"gopkg.in/yaml.v2"
+
+	"github.com/googleapis/gnostic/OpenAPIv2"
+	"github.com/googleapis/gnostic/compiler"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
 	"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
 )
 
+// Test utils
+var data apiData
+
+type apiData struct {
+	sync.Once
+	data *openapi_v2.Document
+	err  error
+}
+
+func (d *apiData) OpenAPISchema() (*openapi_v2.Document, error) {
+	d.Do(func() {
+		// Get the path to the swagger.json file
+		wd, err := os.Getwd()
+		if err != nil {
+			d.err = err
+			return
+		}
+
+		abs, err := filepath.Abs(wd)
+		if err != nil {
+			d.err = err
+			return
+		}
+
+		root := filepath.Dir(filepath.Dir(filepath.Dir(filepath.Dir(filepath.Dir(abs)))))
+		specpath := filepath.Join(root, "api", "openapi-spec", "swagger.json")
+		_, err = os.Stat(specpath)
+		if err != nil {
+			d.err = err
+			return
+		}
+		spec, err := ioutil.ReadFile(specpath)
+		if err != nil {
+			d.err = err
+			return
+		}
+		var info yaml.MapSlice
+		err = yaml.Unmarshal(spec, &info)
+		if err != nil {
+			d.err = err
+			return
+		}
+		d.data, d.err = openapi_v2.NewDocument(info, compiler.NewContext("$root", nil))
+	})
+	return d.data, d.err
+}
+
+type fakeOpenAPIClient struct {
+	calls int
+	err   error
+}
+
+func (f *fakeOpenAPIClient) OpenAPISchema() (*openapi_v2.Document, error) {
+	f.calls = f.calls + 1
+
+	if f.err != nil {
+		return nil, f.err
+	}
+
+	return data.OpenAPISchema()
+}
+
 var _ = Describe("Getting the Resources", func() {
 	var client *fakeOpenAPIClient
 	var expectedData openapi.Resources
@@ -38,7 +108,7 @@ var _ = Describe("Getting the Resources", func() {
 		expectedData, err = openapi.NewOpenAPIData(d)
 		Expect(err).To(BeNil())
 
-		instance = openapi.NewOpenAPIGetter("", "", client)
+		instance = openapi.NewOpenAPIGetter(client)
 	})
 
 	Context("when the server returns a successful result", func() {