Improve deployment verification

With the exception of progress deadline, it now uses the same algorith
as "kubectl rollout status":
https://github.com/kubernetes/kubectl/blob/f89fc21e9c51d313e923eb93d1ae83754be62019/pkg/polymorphichelpers/rollout_status.go#L80-L88

While at it, rename minimum replicas to desired replicas as per
Kubernetes terminology. Minimum replicas are more used in
Horizontal Pod Autoscaling, not the Deployment configuration.

Author: ViliusS

src/main/java/com/google/jenkins/plugins/k8sengine/KubernetesVerifiers.java

@@ -139,9 +139,11 @@ public VerificationResult verify(KubectlWrapper kubectl, Manifests.ManifestObjec
    * available replicas (status.availableReplicas).
    */
   private static class DeploymentVerifier implements Verifier {
-    private static final String AVAILABLE_REPLICAS = "availableReplicas";
-    private static final String MINIMUM_REPLICAS_JSONPATH = "spec.replicas";
     private static final String STATUS_JSONPATH = "status";
+    private static final String AVAILABLE_REPLICAS = "availableReplicas";
+    private static final String UPDATED_REPLICAS = "updatedReplicas";
+    private static final String REPLICAS = "replicas";
+    private static final String DESIRED_REPLICAS_JSONPATH = "spec.replicas";
 
     /**
      * Verifies that the deployment was applied to the GKE cluster.
@@ -164,19 +166,25 @@ public VerificationResult verify(KubectlWrapper kubectl, Manifests.ManifestObjec
         return errorResult(e, object);
       }
 
-      Integer minReplicas = JsonPath.read(json, MINIMUM_REPLICAS_JSONPATH);
+      Integer desiredReplicas = JsonPath.read(json, DESIRED_REPLICAS_JSONPATH);
       Map<String, Object> status = JsonPath.read(json, STATUS_JSONPATH);
       Integer availableReplicas = (Integer) status.getOrDefault(AVAILABLE_REPLICAS, 0);
+      Integer updatedReplicas = (Integer) status.getOrDefault(UPDATED_REPLICAS, 0);
+      Integer replicas = (Integer) status.getOrDefault(REPLICAS, 0);
       boolean verified =
-          minReplicas != null
-              && availableReplicas != null
-              && minReplicas.intValue() <= availableReplicas.intValue();
+          desiredReplicas != null
+              && updatedReplicas.intValue() >= desiredReplicas.intValue()
+              && replicas.intValue() <= updatedReplicas.intValue()
+              && availableReplicas.intValue() == updatedReplicas.intValue();
 
       log.append("AvailableReplicas = ")
           .append(availableReplicas)
           .append(",")
-          .append(" MinimumReplicas = ")
-          .append(minReplicas)
+          .append(" UpdatedReplicas = ")
+          .append(updatedReplicas)
+          .append(",")
+          .append(" DesiredReplicas = ")
+          .append(desiredReplicas)
           .append("\n");
 
       return new VerificationResult(log.toString(), verified, object);

src/main/java/com/google/jenkins/plugins/k8sengine/VerificationTask.java

@@ -76,7 +76,8 @@ public KubernetesVerifiers.VerificationResult getVerificationResult() {
    * @return Self-reference after performing verify.
    */
   private VerificationTask verify() {
-    consoleLogger.println(String.format("Verifying: %s ", manifestObject.describe()));
+    consoleLogger.println(
+        Messages.KubernetesEngineBuilder_VerifyingLogPrefix(manifestObject.describe()));
     currentResult = KubernetesVerifiers.verify(kubectl, manifestObject);
     if (isVerified()) {
       consoleLogger.println(currentResult.toString());

src/test/java/com/google/jenkins/plugins/k8sengine/KubernetesVerifiersTest.java

@@ -46,10 +46,12 @@ public void testGoodDeploymentVerified() throws Exception {
         KubernetesVerifiers.verify(kubectl, goodDeployment);
     assertTrue(result.isVerified());
     Integer availableReplicas = JsonPath.read(goodDeploymentOutput, "status.availableReplicas");
-    Integer minimumReplicas = JsonPath.read(goodDeploymentOutput, "spec.replicas");
+    Integer updatedReplicas = JsonPath.read(goodDeploymentOutput, "status.updatedReplicas");
+    Integer desiredReplicas = JsonPath.read(goodDeploymentOutput, "spec.replicas");
     String shouldBeInLog =
         String.format(
-            "AvailableReplicas = %s, MinimumReplicas = %s", availableReplicas, minimumReplicas);
+            "AvailableReplicas = %s, UpdatedReplicas = %s, DesiredReplicas = %s",
+            availableReplicas, updatedReplicas, desiredReplicas);
     String verificationLog = result.toString();
     assertTrue(verificationLog.contains(shouldBeInLog));
   }
@@ -70,11 +72,13 @@ public void testBadDeploymentNotVerified() throws Exception {
         KubernetesVerifiers.verify(kubectl, badDeployment);
     assertFalse(result.isVerified());
 
-    Integer minimumReplicas = JsonPath.read(badDeploymentOutput, "spec.replicas");
+    Integer desiredReplicas = JsonPath.read(badDeploymentOutput, "spec.replicas");
+    Integer updatedReplicas = JsonPath.read(badDeploymentOutput, "status.updatedReplicas");
     Integer availableReplicas = 0;
     String shouldBeInLog =
         String.format(
-            "AvailableReplicas = %s, MinimumReplicas = %s", availableReplicas, minimumReplicas);
+            "AvailableReplicas = %s, UpdatedReplicas = %s, DesiredReplicas = %s",
+            availableReplicas, updatedReplicas, desiredReplicas);
     String verificationLog = result.toString();
     assertTrue(verificationLog.contains(shouldBeInLog));
   }