Added comments;Added README

Signed-off-by: jubittajohn <jujohn@redhat.com>

test/operator-e2e/README.md

@@ -0,0 +1,53 @@
+# Cross-component E2E for operator framework
+
+This is a cross-component demo with all OLM v1 repositories. The ginkgo test does the following: 
+-  Automates the creation of plain+v0 bundles and FBCs for a set of bundle manifest directories.
+- Creates, upgrades and deletes a plain+v0 operator.
+
+## Objective
+- Development on OLM v1 is split across multiple repositories, and the list of relevant repositories may grow over time. While we have demos showing improvements in functionality of components over time, it can be difficult to have a picture of the state of OLM v1 at any given time for someone not following its development closely. Having a single source to look for OLM v1 behavior can provide more clarity about the state of the project.
+- With the scale of the OLM v1 project, it is useful to have a means to test components in the operator development + lifecycle pipeline together to create a more cohesive experience for all users.
+
+## Getting Started
+
+- Plain bundle manifests are taken as input.
+
+    - The plain bundle manifest directory taken as input should follow the below directory structure:
+        ```
+            bundles/
+                └── plain-v0/
+                    ├── plain.v0.1.0/
+                    │        ├── manifests
+                    │        └── Dockerfile
+                    └── plain.v0.1.1/
+                                ├── manifests
+                                └── Dockerfile
+        ```
+    - The bundles should present in the testdata folder.
+    - The bundle paths and bundle image reference is hard coded in the test.
+
+- After the bundle image is created and loaded, the FBC is created by accepting the required information in a config file named `catalog_config.yaml` in the directory `test/operator-e2e/config`.
+
+    - Example `catalog_config.yaml` file:
+        ```
+        schema: catalog-config
+        packageName: plain
+        channelData:
+        - channelName: foo
+            channelEntries:
+            - entryVersion: 0.1.0
+            replaces: null
+            skipRange: null
+            skips:
+            - null
+        bundleData:
+        - bundleImage: foobar:v0.1.0
+            bundleVersion: 0.1.0
+        ```
+    - The generated FBC will be present in the directory structure: `testdata/catalogs/plainv0-test-catalog`.
+    - The Dockerfile is generated and the FBC image is built and loaded.
+    - The output catalog path, catalog name, catalog image reference are hard-coded in the test.
+    - The FBC generated is validated using opm.
+
+- The FBC image is then used to create an operator.
+    -  Based on the catalog data, we hard code the package names and their version that is to be installed and upgraded.

test/operator-e2e/config/catalog_config.yaml

@@ -6,12 +6,12 @@ channelData:
   - entryVersion: 0.1.0
     replaces: null
     skips: 
-      - 0.1.1
+      - null
     skipRange: null
   - entryVersion: 0.1.1
-    replaces: 0.1.0
+    replaces: null
     skips: 
-    - null
+    - 0.1.0
     skipRange: null
 - channelName: foo
   channelEntries:

test/operator-e2e/config/read_config.go

@@ -36,6 +36,7 @@ type Config struct {
 	BundleData  []BundleData  `json:"bundleData"`
 }
 
+// Reads the catalog-config.yaml and maps it to the above structs
 func ReadFile(f string) (*Config, error) {
 	b, err := readFile(f)
 	if err != nil {

test/operator-e2e/create_fbc.go

@@ -20,6 +20,7 @@ const (
 	BundleMediatype       = "plain+v0"
 )
 
+// Reads the catalog-config and creates the FBC by calling functions for forming the package, channel and bundles.
 func CreateFBC(configFilePath string) (*declcfg.DeclarativeConfig, error) {
 	config, err := config.ReadFile(configFilePath)
 	if err != nil {
@@ -38,6 +39,7 @@ func CreateFBC(configFilePath string) (*declcfg.DeclarativeConfig, error) {
 	return &fbc, nil
 }
 
+// Forms package schema for the FBC
 func formPackage(config config.Config) declcfg.Package {
 	packageFormed := declcfg.Package{
 		Schema:         SchemaPackage,
@@ -47,6 +49,7 @@ func formPackage(config config.Config) declcfg.Package {
 	return packageFormed
 }
 
+// Forms channel schema for the FBC
 func formChannel(config config.Config) []declcfg.Channel {
 	channelFormed := make([]declcfg.Channel, 0, len(config.ChannelData))
 	for _, channel := range config.ChannelData {
@@ -61,6 +64,7 @@ func formChannel(config config.Config) []declcfg.Channel {
 	return channelFormed
 }
 
+// Forms the uprade graph for the FBC
 func formChannelEntries(pkgName string, channel config.ChannelData) []declcfg.ChannelEntry {
 	channelEntries := make([]declcfg.ChannelEntry, 0, len(channel.ChannelEntries))
 	for _, channelEntry := range channel.ChannelEntries {
@@ -73,7 +77,7 @@ func formChannelEntries(pkgName string, channel config.ChannelData) []declcfg.Ch
 		if len(channelEntry.Skips) != 0 {
 			for _, s := range channelEntry.Skips {
 				if s != "" {
-					skip = append(skip, s)
+					skip = append(skip, pkgName+"."+s)
 				}
 			}
 		}
@@ -87,6 +91,7 @@ func formChannelEntries(pkgName string, channel config.ChannelData) []declcfg.Ch
 	return channelEntries
 }
 
+// Forms bundle schema for the FBC
 func formBundle(config config.Config) []declcfg.Bundle {
 	bundleFormed := make([]declcfg.Bundle, 0, len(config.BundleData))
 	for _, bundle := range config.BundleData {
@@ -111,7 +116,8 @@ func formBundle(config config.Config) []declcfg.Bundle {
 	return bundleFormed
 }
 
-func WriteFBC(fbc declcfg.DeclarativeConfig, fbcFilePath string, fbcFileName string) error {
+// Writes the formed FBC into catalog.yaml file
+func WriteFBC(fbc declcfg.DeclarativeConfig, fbcFilePath, fbcFileName string) error {
 	var buf bytes.Buffer
 	err := declcfg.WriteYAML(fbc, &buf)
 	if err != nil {

test/operator-e2e/generate_dockerfile.go

@@ -6,7 +6,8 @@ import (
 	"text/template"
 )
 
-func generateDockerFile(dockerFilePath string, yamlFolderName string, dockerFileName string) error {
+// generates Dockerfile and its contents for a given yaml file
+func generateDockerFile(dockerFilePath, yamlFolderName, dockerFileName string) error {
 	t, err := template.New("dockerfile").Parse(dockerfileTmpl)
 	if err != nil {
 		panic(err)

test/operator-e2e/operator_test.go

@@ -42,7 +42,7 @@ var (
 	err             error
 	ctx             context.Context
 	bundleInfo      = []BundleInfo{
-		{
+		{ // The bundle directories of the plain bundles whose image is to be created and pushed along with the image reference
 			BundleImageRef:  "localhost/testdata/bundles/plain-v0/plain:v0.1.0",
 			BundleDirectory: "plain.v0.1.0",
 		},
@@ -102,6 +102,7 @@ var _ = BeforeSuite(func() {
 
 var _ = AfterSuite(func() {
 	Eventually(func(g Gomega) {
+		// Deleting the catalog object and checking if the deletion was successful
 		err = deleteAndCheckCatalogDeleted(operatorCatalog)
 		g.Expect(errors.IsNotFound(err)).To(BeTrue())
 	}).Should(Succeed())

test/operator-e2e/read_manifests.go

@@ -19,8 +19,8 @@ type Object struct {
 	} `yaml:"metadata"`
 }
 
-// collects the Kubernetes objects present in the bundle manifest folder
-func collectKubernetesObjects(packageName string, version string) ([]Object, error) {
+// collects the Kubernetes objects present in the bundle manifest folder for a particular package and its version
+func collectKubernetesObjects(packageName, version string) ([]Object, error) {
 	objects := []Object{}
 
 	bundleManifestPath := filepath.Join(bundlePath, packageName+".v"+version, "manifests")