feat: Test scripts accept payload filename argument

Closes #807

Signed-off-by: Patrick Kremer <[email protected]>

examples/knative/powercli/kn-pcli-template/README.md

@@ -90,7 +90,7 @@ Next, locate the `ConfigSpec` section of the JSON file. Change the `MaxMTU` prop
 **WARNING** - This function will reconfigure your distributed virtual switch - if your MTU is not set to 1500, it will be reset by this function.
 ---
 
-In a separate terminal, run either `send-cloudevent-test.ps1` (PowerShell Script) or `send-cloudevent-test.sh` (Bash Script) to simulate a CloudEvent payload being sent to the local container image
+In a separate terminal, run either `send-cloudevent-test.ps1` (PowerShell Script) or `send-cloudevent-test.sh` (Bash Script) to simulate a CloudEvent payload being sent to the local container image. When run with no arguments, the scripts will send the contents of `test-payload.json` as the payload. If you pass the scripts a different filename as an argument, they will send the contents of the specified file instead. Example: `send-cloudevent-test.ps1 test-payload2.json`. This testing technique is useful when writing complex functions with varying payloads.
 
 ```console
 Testing Function ...

examples/knative/powercli/kn-pcli-template/test/send-cloudevent-test.ps1

@@ -8,7 +8,17 @@ $headers = @{
     "ce-subject" = "DvsReconfiguredEvent";
 }
 
-$body = Get-Content -Raw -Path "./test-payload.json"
+$payloadPath = "./test-payload.json"
+if ( $args.Count -gt 0 ) {
+    if ( Test-Path $args[0] ) {
+        $payloadPath = $args[0]
+    }
+    else {
+        Write-Host "$(Get-Date) - ERROR: Invalid path"$args[0]"`n"
+        exit
+    }
+}
+$body = Get-Content -Raw -Path $payloadPath
 
 Write-Host "Testing Function ..."
 Invoke-WebRequest -Uri http://localhost:8080 -Method POST -Headers $headers -Body $body

examples/knative/powercli/kn-pcli-template/test/send-cloudevent-test.sh

@@ -2,7 +2,16 @@
 
 # The ce-subject value should match the event router subject in function.yaml
 echo "Testing Function ..."
-curl [email protected] \
+PAYLOAD_PATH="test-payload.json"
+if [ $# -gt 0 ]; then
+    if test -f "$1"; then
+        PAYLOAD_PATH=$1
+    else
+        echo "$1 not found"
+        exit 1
+    fi
+fi
+curl -d@$PAYLOAD_PATH \
     -H "Content-Type: application/json" \
     -H 'ce-specversion: 1.0' \
     -H 'ce-id: d70079f9-fddd-4b7f-aa76-1193f28b0611' \