valid config file test case added

Author: chitrangpatel

docs/install.md

@@ -500,7 +500,11 @@ kubectl patch cm feature-flags -n tekton-pipelines -p '{"data":{"results-from":"
 ```
 
 3. If you want the size per result to be something other than 4096 bytes, you can set the `max-result-size` feature flag in bytes by setting `max-result-size: 8192(whatever you need here)`. **Note:** The value you can set here cannot exceed the size of the CRD limit of 1.5 MB.
-  
+ 
+```
+kubectl patch cm feature-flags -n tekton-pipelines -p '{"data":{"max-result-size":"<VALUE-IN-BYTES>"}}'
+```
+
 ## Configuring High Availability
 
 If you want to run Tekton Pipelines in a way so that webhooks are resiliant against failures and support

pkg/apis/config/feature_flags_test.go

@@ -144,6 +144,18 @@ func TestNewFeatureFlagsFromConfigMap(t *testing.T) {
 			},
 			fileName: "feature-flags-enable-spire",
 		},
+		{
+			expectedConfig: &config.FeatureFlags{
+				EnableAPIFields:                  "stable",
+				EmbeddedStatus:                   "full",
+				ResourceVerificationMode:         config.DefaultResourceVerificationMode,
+				RunningInEnvWithInjectedSidecars: config.DefaultRunningInEnvWithInjectedSidecars,
+				AwaitSidecarReadiness:            config.DefaultAwaitSidecarReadiness,
+				ResultExtractionMethod:           config.ResultExtractionMethodSidecarLogs,
+				MaxResultSize:                    8192,
+			},
+			fileName: "feature-flags-results-via-sidecar-logs",
+		},
 	}
 
 	for _, tc := range testCases {

pkg/apis/config/testdata/feature-flags-results-via-sidecar-logs.yaml

@@ -0,0 +1,22 @@
+# Copyright 2021 The Tekton Authors
+#
+# 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
+#
+#     https://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.
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: feature-flags
+  namespace: tekton-pipelines
+data:
+  results-from: "sidecar-logs"
+  max-result-size: 8192