feat(gce): add testing for hyperdisk disk option

clouddriver-google/src/test/groovy/com/netflix/spinnaker/clouddriver/google/model/GoogleDiskSpec.groovy

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+/*
+ * Copyright 2024 Netflix, Inc.
+ *
+ * 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 com.netflix.spinnaker.clouddriver.google.model
+
+import spock.lang.Specification
+
+class GoogleDiskSpec extends Specification {
+
+  def "Test setting disk type pd-ssd"() {
+    given: "A GoogleDisk object"
+    def disk = new GoogleDisk()
+
+    when: "The type is set"
+    disk.setType("pd-ssd")
+
+    then: "The type should be pd-ssd"
+    disk.type == GoogleDiskType.PD_SSD
+  }
+
+  def "Test setting disk type hyperdisk-balanced"() {
+    given: "A GoogleDisk object"
+    def disk = new GoogleDisk()
+
+    when: "The type is set"
+    disk.setType("hyperdisk-balanced")
+
+    then: "The type should be hyperdisk-balanced"
+    disk.type == GoogleDiskType.HYPERDISK_BALANCED
+  }
+
+  def "Test default disk type on unknown"() {
+    given: "A GoogleDisk object"
+    def disk = new GoogleDisk()
+
+    when: "The type is set"
+    disk.setType("UNKNOWN")
+
+    then: "The type should be pd-standard"
+    disk.type == GoogleDiskType.PD_STANDARD
+  }
+
+  def "Test persistent disk detection"() {
+    given: "A persistent GoogleDisk object"
+    def disk = new GoogleDisk(type: "pd-ssd")
+
+    expect: "The disk is detected as persistent"
+    disk.isPersistent()
+  }
+}