databroker: rename cache service (#1790)

* rename cache folder

* rename cache service everywhere

* skip yaml in examples

* Update docs/docs/topics/data-storage.md

Co-authored-by: Travis Groth <travisgroth@users.noreply.github.com>

Co-authored-by: Travis Groth <travisgroth@users.noreply.github.com>

databroker/cache_test.go

@@ -0,0 +1,40 @@
+package databroker
+
+import (
+	"io/ioutil"
+	"log"
+	"net/url"
+	"os"
+	"testing"
+
+	"github.com/pomerium/pomerium/config"
+	"github.com/pomerium/pomerium/pkg/cryptutil"
+)
+
+func TestNew(t *testing.T) {
+	dir, err := ioutil.TempDir("", "example")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+
+	tests := []struct {
+		name    string
+		opts    config.Options
+		wantErr bool
+	}{
+		{"good", config.Options{SharedKey: cryptutil.NewBase64Key(), DataBrokerURL: &url.URL{Scheme: "http", Host: "example"}}, false},
+		{"bad shared secret", config.Options{SharedKey: string([]byte(cryptutil.NewBase64Key())[:31]), DataBrokerURL: &url.URL{Scheme: "http", Host: "example"}}, true},
+		{"bad databroker url", config.Options{SharedKey: cryptutil.NewBase64Key(), DataBrokerURL: &url.URL{}}, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tt.opts.Provider = "google"
+			_, err := New(&config.Config{Options: &tt.opts})
+			if (err != nil) != tt.wantErr {
+				t.Errorf("New() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+		})
+	}
+}