chore(aws lbs): Add unit test (#5054)

This is a follow up to #5051 to add unit tests

clouddriver-aws/src/test/groovy/com/netflix/spinnaker/clouddriver/aws/provider/view/AmazonLoadBalancerProviderSpec.groovy

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020 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.aws.provider.view
+
+import com.netflix.spinnaker.cats.cache.Cache
+import com.netflix.spinnaker.cats.cache.CacheFilter
+import com.netflix.spinnaker.cats.cache.DefaultCacheData
+import com.netflix.spinnaker.clouddriver.aws.provider.AwsProvider
+import spock.lang.Specification
+import spock.lang.Subject
+
+import static com.netflix.spinnaker.clouddriver.core.provider.agent.Namespace.*
+
+class AmazonLoadBalancerProviderSpec extends Specification {
+  def cacheView = Mock(Cache)
+  def awsProvider = Mock(AwsProvider)
+
+  @Subject
+  def provider = new AmazonLoadBalancerProvider(cacheView, awsProvider)
+
+  def app = "app"
+  def account = "some_long_account_name"
+  def region = "us-east-1"
+  def stack = "stack"
+  def detail = "detail"
+  def vpc = "vpc-a45e72d1"
+
+  def "should get load balance by application"() {
+    given:
+    cacheView.getIdentifiers(LOAD_BALANCERS.ns) >> ["aws:loadBalancers:$account:$region:$app:$vpc",
+                                                    "aws:loadBalancers:$account:$region:$app-$stack:$vpc:network",
+                                                    "aws:loadBalancers:$account:$region:$app-$stack-$detail:$vpc:albFunction",
+                                                    "aws:loadBalancers:$account:$region:wrong$app-$stack-$detail:$vpc:albFunction"]
+    cacheView.getIdentifiers(TARGET_GROUPS.ns) >> []
+
+    cacheView.getAll(_, _, _) >> { String collection, Set<String> keys, CacheFilter filter ->
+      return keys.collect {
+        new DefaultCacheData(
+          it,
+          [:],
+          [:]
+        )
+      }
+    }
+
+    cacheView.getAll(TARGET_GROUPS.ns, _, _) >> []
+
+    when: 'Requesting LBs for our app'
+    def result = provider.getApplicationLoadBalancers(app)
+
+    then: 'We get them all'
+    result.size() == 3
+
+    when: 'Requesting all network LBs'
+    result = provider.getApplicationLoadBalancers("network")
+
+    then: 'We get nothing since "network" is not the name of the app'
+    result.size() == 0
+  }
+}