From d7441e788589000a98009483671bf392fe5b19da Mon Sep 17 00:00:00 2001
From: David Simansky <dsimansk@redhat.com>
Date: Thu, 13 May 2021 15:05:20 +0200
Subject: [PATCH] Fix replicas *int32 type in describe commands

---
 pkg/kn/commands/revision/describe.go      |  4 +--
 pkg/kn/commands/revision/describe_test.go | 30 +++++++++++++++++++----
 pkg/kn/commands/service/describe_test.go  |  4 +--
 3 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/pkg/kn/commands/revision/describe.go b/pkg/kn/commands/revision/describe.go
index 9530b1d270..ff5e5fa4ce 100644
--- a/pkg/kn/commands/revision/describe.go
+++ b/pkg/kn/commands/revision/describe.go
@@ -206,8 +206,8 @@ func WriteEnvFrom(dw printers.PrefixWriter, revision *servingv1.Revision, printD
 func WriteReplicas(dw printers.PrefixWriter, revision *servingv1.Revision) {
 	actualReplicas := revision.Status.ActualReplicas
 	desiredReplicas := revision.Status.DesiredReplicas
-	if actualReplicas != 0 || desiredReplicas != 0 {
-		dw.WriteAttribute("Replicas", fmt.Sprintf("%d/%d", actualReplicas, desiredReplicas))
+	if actualReplicas != nil && desiredReplicas != nil {
+		dw.WriteAttribute("Replicas", fmt.Sprintf("%d/%d", *actualReplicas, *desiredReplicas))
 	}
 }
 
diff --git a/pkg/kn/commands/revision/describe_test.go b/pkg/kn/commands/revision/describe_test.go
index a903caf527..e06a04e6e4 100644
--- a/pkg/kn/commands/revision/describe_test.go
+++ b/pkg/kn/commands/revision/describe_test.go
@@ -20,6 +20,8 @@ import (
 	"testing"
 	"time"
 
+	"knative.dev/pkg/ptr"
+
 	"gotest.tools/v3/assert"
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/equality"
@@ -106,7 +108,7 @@ func TestDescribeRevisionYaml(t *testing.T) {
 }
 
 func TestDescribeRevisionBasic(t *testing.T) {
-	expectedRevision := createTestRevision("test-rev", 3)
+	expectedRevision := createTestRevision("test-rev", 3, ptr.Int32(1))
 
 	action, data, err := fakeRevision([]string{"revision", "describe", "test-rev"}, &expectedRevision)
 	if err != nil {
@@ -120,11 +122,29 @@ func TestDescribeRevisionBasic(t *testing.T) {
 	}
 
 	assert.Assert(t, util.ContainsAll(data, "Image:", "gcr.io/test/image", "++ Ready", "Port:", "8080"))
-	assert.Assert(t, util.ContainsAll(data, "Replicas:", "0/1"))
+	assert.Assert(t, util.ContainsAll(data, "Replicas:", "1/1"))
 	assert.Assert(t, util.ContainsAll(data, "EnvFrom:", "cm:test1, cm:test2"))
 }
 
-func createTestRevision(revision string, gen int64) servingv1.Revision {
+func TestDescribeRevisionReplicas(t *testing.T) {
+	expectedRevision := createTestRevision("test-rev", 3, ptr.Int32(1))
+	_, data, err := fakeRevision([]string{"revision", "describe", "test-rev"}, &expectedRevision)
+	assert.NilError(t, err)
+	assert.Assert(t, util.ContainsAll(data, "Replicas:", "1/1"))
+
+	expectedRevision = createTestRevision("test-rev", 3, ptr.Int32(0))
+	_, data, err = fakeRevision([]string{"revision", "describe", "test-rev"}, &expectedRevision)
+	assert.NilError(t, err)
+	assert.Assert(t, util.ContainsAll(data, "Replicas:", "0/0"))
+
+	expectedRevision = createTestRevision("test-rev", 3, nil)
+	_, data, err = fakeRevision([]string{"revision", "describe", "test-rev"}, &expectedRevision)
+	assert.NilError(t, err)
+	assert.Assert(t, util.ContainsNone(data, "Replicas:"))
+
+}
+
+func createTestRevision(revision string, gen int64, replicas *int32) servingv1.Revision {
 	labels := make(map[string]string)
 	labels[apiserving.ConfigurationGenerationLabelKey] = fmt.Sprintf("%d", gen)
 
@@ -162,8 +182,8 @@ func createTestRevision(revision string, gen int64) servingv1.Revision {
 			},
 		},
 		Status: servingv1.RevisionStatus{
-			ActualReplicas:        0,
-			DesiredReplicas:       1,
+			ActualReplicas:        replicas,
+			DesiredReplicas:       replicas,
 			DeprecatedImageDigest: "gcr.io/test/image@" + imageDigest,
 			Status: duckv1.Status{
 				Conditions: goodConditions(),
diff --git a/pkg/kn/commands/service/describe_test.go b/pkg/kn/commands/service/describe_test.go
index 5ea4a22dd4..1be1faf60c 100644
--- a/pkg/kn/commands/service/describe_test.go
+++ b/pkg/kn/commands/service/describe_test.go
@@ -763,8 +763,8 @@ func createTestRevision(revision string, gen int64, conditions duckv1.Conditions
 			},
 		},
 		Status: servingv1.RevisionStatus{
-			ActualReplicas:        0,
-			DesiredReplicas:       1,
+			ActualReplicas:        ptr.Int32(0),
+			DesiredReplicas:       ptr.Int32(1),
 			DeprecatedImageDigest: "gcr.io/test/image@" + imageDigest,
 			Status: duckv1.Status{
 				Conditions: conditions,