Fission upgrade tests (#605)

Tests for upgrading Fission from the last version to current branch and testing. Currently test is very simple and more tests can be added in future

test/upgrade/fixture_tests.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+set -euo pipefail
+
+ROOT_RELPATH=$(dirname $0)/../..
+pushd $ROOT_RELPATH
+ROOT=$(pwd)
+popd
+
+setup_fission_objects() {
+    log "==== Setting up objects for upgrade test ===="
+    log "Creating env, function and route"
+    fission env create --name nodejs --image fission/node-env --mincpu 20 --maxcpu 100 --minmemory 128 --maxmemory 256
+
+    fission fn create --name upgradehello --env nodejs --code $ROOT/examples/nodejs/hello.js --executortype poolmgr
+
+    fission route create --function upgradehello --url /upgradehello --method GET
+    log "Waiting for router to catch up"
+    sleep 5
+    log "==== Finished setting up objects for upgrade test ===="
+}
+
+upgrade_tests() {
+    log "==== Tests Start ===="
+    log "Doing an HTTP GET on the function's route"
+    response=$(curl http://$FISSION_ROUTER/upgradehello)
+
+    log "Checking for valid response"
+    echo $response | grep -i hello
+    log "==== Tests End ===="
+}
+
+validate_post_upgrade() {
+    echo `fission -v`
+    echo "Fission environments:"
+    echo `fission env list`
+    echo "Fission Functions:"
+    echo `fission fn list`
+    echo "Fission Routes:"
+    echo `fission route list`
+}
+
+cleanup_fission_objects() {
+    log "==== Cleanup Start ===="
+    log "Input: $1"
+    id=$1
+    echo "Cleaning up objects"
+    fission env delete --name nodejs || true
+    fission fn delete --name upgradehello || true
+
+    echo "Uninstalling fission"
+    helm delete --purge $id
+    kubectl delete ns f-$id || true
+    log "==== Cleanup End ===="
+}