Add unit tests for xds package

changelog/v1.15.0-beta15/add-xds-unit-tests.yaml

@@ -0,0 +1,7 @@
+changelog:
+- type: NON_USER_FACING
+  issueLink: https://github.com/solo-io/solo-projects/issues/5113
+  resolvesIssue: true
+  description: >-
+    Adds new unit tests to improve coverage of the xds package.
+

projects/gloo/pkg/xds/cache_test.go

@@ -0,0 +1,42 @@
+package xds_test
+
+import (
+	"fmt"
+
+	envoy_config_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	v1 "github.com/solo-io/gloo/projects/gloo/pkg/api/v1"
+	"github.com/solo-io/gloo/projects/gloo/pkg/xds"
+	"google.golang.org/protobuf/types/known/structpb"
+)
+
+var _ = Describe("Cache", func() {
+
+	It("NodeRoleHasher generates the correct ID", func() {
+		nodeRoleHasher := xds.NewNodeRoleHasher()
+		node := &envoy_config_core_v3.Node{}
+		// Ensure it returns the fallback key if the role field in the node metadata is not present
+		Expect(nodeRoleHasher.ID(node)).To(Equal(xds.FallbackNodeCacheKey))
+
+		role := "role"
+		node.Metadata = &structpb.Struct{
+			Fields: map[string]*structpb.Value{
+				role: structpb.NewStringValue(role),
+			},
+		}
+		// Ensure it returns the role field in the node metadata
+		Expect(nodeRoleHasher.ID(node)).To(Equal(role))
+	})
+
+	It("SnapshotCacheKeys returns the keys formatted correctly", func() {
+		namespace1, namespace2, name1, name2 := "namespace1", "namespace2", "name1", "name2"
+		proxies := []*v1.Proxy{
+			v1.NewProxy(namespace1, name1),
+			v1.NewProxy(namespace2, name2),
+		}
+		expectedKeys := []string{fmt.Sprintf("%v~%v", namespace1, name1), fmt.Sprintf("%v~%v", namespace2, name2)}
+		actualKeys := xds.SnapshotCacheKeys(proxies)
+		Expect(actualKeys).To(BeEquivalentTo(expectedKeys))
+	})
+})