test-em-all.sh

#!/usr/bin/env bash
#
# ./gradlew clean build
# docker-compose build
# docker-compose up -d
#
# Sample usage (for use with Docker Compose):
#
#   HOST=localhost PORT=8443 HEALTH_URL=https://localhost:8443 ./test-em-all.bash
#
: ${HOST=minikube.me}
: ${PORT=443}
: ${HEALTH_URL=http://product-composite.hands-on.svc.cluster.local}
: ${MGM_PORT=4004}
: ${PROD_ID_REVS_RECS=2}
: ${PROD_ID_NOT_FOUND=13}
: ${PROD_ID_NO_RECS=114}
: ${PROD_ID_NO_REVS=214}
: ${NAMESPACE=hands-on}
: ${SKIP_CB_TESTS=false}

function assertCurl() {

    local expectedHttpCode=$1
    local curlCmd="$2 -w \"%{http_code}\""
    local result=$(eval $curlCmd)
    local httpCode="${result:(-3)}"
    RESPONSE='' && (( ${#result} > 3 )) && RESPONSE="${result%???}"

    if [ "$httpCode" = "$expectedHttpCode" ]
    then
        if [ "$httpCode" = "200" ]
        then
            echo "Test OK (HTTP Code: $httpCode)"
        else
            echo "Test OK (HTTP Code: $httpCode, $RESPONSE)"
        fi
        return 0
    else
        echo  "Test FAILED, EXPECTED HTTP Code: $expectedHttpCode, GOT: $httpCode, WILL ABORT!"
        echo  "- Failing command: $curlCmd"
        echo  "- Response Body: $RESPONSE"
        return 1
    fi
}

function assertEqual() {

    local expected=$1
    local actual=$2

    if [ "$actual" = "$expected" ]
    then
        echo "Test OK (actual value: $actual)"
        return 0
    else
        echo "Test FAILED, EXPECTED VALUE: $expected, ACTUAL VALUE: $actual, WILL ABORT"
        return 1
    fi
}

function testUrl() {
    url=$@
    if $url --connect-timeout 2 --max-time 10 -ks -f -o /dev/null
    then
          return 0
    else
          return 1
    fi;
}

function waitForService() {
    url=$@
    echo -n "Wait for: $url... "
    n=0
    until testUrl $url
    do
        n=$((n + 1))
        if [[ $n == 100 ]]
        then
            echo " Give up"
            exit 1
        else
            sleep 3
            echo -n ", retry #$n "
        fi
    done
    echo "DONE, continues..."
}

function testCompositeCreated() {

    # Expect that the Product Composite for productId $PROD_ID_REVS_RECS has been created with three recommendations and three reviews
    if ! assertCurl 200 "curl $AUTH -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS -s"
    then
        echo -n "FAIL"
        return 1
    fi

    set +e
    assertEqual "$PROD_ID_REVS_RECS" $(echo $RESPONSE | jq .productId)
    if [ "$?" -eq "1" ] ; then return 1; fi

    assertEqual 3 $(echo $RESPONSE | jq ".recommendations | length")
    if [ "$?" -eq "1" ] ; then return 1; fi

    assertEqual 3 $(echo $RESPONSE | jq ".reviews | length")
    if [ "$?" -eq "1" ] ; then return 1; fi

    set -e
}

function waitForMessageProcessing() {
    echo "Wait for messages to be processed... "

    # Give background processing some time to complete...
    sleep 1

    n=0
    until testCompositeCreated
    do
        n=$((n + 1))
        if [[ $n == 40 ]]
        then
            echo " Give up"
            exit 1
        else
            sleep 3
            echo -n ", retry #$n "
        fi
    done
    echo "All messages are now processed!"
}

function recreateComposite() {
    local productId=$1
    local composite=$2

    assertCurl 200 "curl $AUTH -X DELETE -k https://$HOST:$PORT/product-composite/${productId} -s"
    curl -X POST -k https://$HOST:$PORT/product-composite -H "Content-Type: application/json" -H "Authorization: Bearer $ACCESS_TOKEN" --data "$composite"
}

function setupTestdata() {

    body="{\"productId\":$PROD_ID_NO_RECS"
    body+=\
',"name":"product name A","weight":100, "reviews":[
    {"reviewId":1,"author":"author 1","subject":"subject 1","content":"content 1"},
    {"reviewId":2,"author":"author 2","subject":"subject 2","content":"content 2"},
    {"reviewId":3,"author":"author 3","subject":"subject 3","content":"content 3"}
]}'
    recreateComposite "$PROD_ID_NO_RECS" "$body"

    body="{\"productId\":$PROD_ID_NO_REVS"
    body+=\
',"name":"product name B","weight":200, "recommendations":[
    {"recommendationId":1,"author":"author 1","rate":1,"content":"content 1"},
    {"recommendationId":2,"author":"author 2","rate":2,"content":"content 2"},
    {"recommendationId":3,"author":"author 3","rate":3,"content":"content 3"}
]}'
    recreateComposite "$PROD_ID_NO_REVS" "$body"


    body="{\"productId\":$PROD_ID_REVS_RECS"
    body+=\
',"name":"product name C","weight":300, "recommendations":[
        {"recommendationId":1,"author":"author 1","rate":1,"content":"content 1"},
        {"recommendationId":2,"author":"author 2","rate":2,"content":"content 2"},
        {"recommendationId":3,"author":"author 3","rate":3,"content":"content 3"}
    ], "reviews":[
        {"reviewId":1,"author":"author 1","subject":"subject 1","content":"content 1"},
        {"reviewId":2,"author":"author 2","subject":"subject 2","content":"content 2"},
        {"reviewId":3,"author":"author 3","subject":"subject 3","content":"content 3"}
    ]}'
    recreateComposite "$PROD_ID_REVS_RECS" "$body"

}

function testCircuitBreaker() {

    echo "Start Circuit Breaker tests!"

    # Assume we are using Docker Compose if we are running on localhost, otherwise Kubernetes
    if [ "$HOST" = "localhost" ]
    then
        EXEC="docker run --rm -it --network=my-network alpine"
    else
        echo "Restarting alpine-client..."
        local ns=$NAMESPACE
        if kubectl -n $ns get pod alpine-client > /dev/null ; then
            kubectl -n $ns delete pod alpine-client --grace-period=1
        fi
        kubectl -n $ns run --restart=Never alpine-client --image=alpine --command -- sleep 600
        echo "Waiting for alpine-client to be ready..."
        kubectl -n $ns wait --for=condition=Ready pod/alpine-client

        EXEC="kubectl -n $ns exec alpine-client --"
    fi

    # First, use the health - endpoint to verify that the circuit breaker is closed
    assertEqual "CLOSED" "$($EXEC wget product-composite:${MGM_PORT}/actuator/health -qO - | jq -r .components.circuitBreakers.details.product.details.state)"

    # Open the circuit breaker by running three slow calls in a row, i.e. that cause a timeout exception
    # Also, verify that we get 500 back and a timeout related error message
    for ((n=0; n<3; n++))
    do
        assertCurl 500 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS?delay=3 $AUTH -s"
        message=$(echo $RESPONSE | jq -r .message)
        assertEqual "Did not observe any item or terminal signal within 2000ms" "${message:0:57}"
    done

    # Verify that the circuit breaker now is open by running the slow call again, verify it gets 200 back, i.e. fail fast works, and a response from the fallback method.
    assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS?delay=3 $AUTH -s"
    assertEqual "Fallback product2" "$(echo "$RESPONSE" | jq -r .name)"

    # Also, verify that the circuit breaker is open by running a normal call, verify it also gets 200 back and a response from the fallback method.
    assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS $AUTH -s"
    assertEqual "Fallback product2" "$(echo "$RESPONSE" | jq -r .name)"

    # Verify that a 404 (Not Found) error is returned for a non existing productId ($PROD_ID_NOT_FOUND) from the fallback method.
    assertCurl 404 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_NOT_FOUND $AUTH -s"
    assertEqual "Product Id: $PROD_ID_NOT_FOUND not found in fallback cache!" "$(echo $RESPONSE | jq -r .message)"

    # Wait for the circuit breaker to transition to the half open state (i.e. max 10 sec)
    echo "Will sleep for 10 sec waiting for the CB to go Half Open..."
    sleep 10

    # Verify that the circuit breaker is in half open state
    assertEqual "HALF_OPEN" "$($EXEC wget product-composite:${MGM_PORT}/actuator/health -qO - | jq -r .components.circuitBreakers.details.product.details.state)"

    # Close the circuit breaker by running three normal calls in a row
    # Also, verify that we get 200 back and a response based on information in the product database
    for ((n=0; n<3; n++))
    do
        assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS $AUTH -s"
        assertEqual "product name C" "$(echo "$RESPONSE" | jq -r .name)"
    done

    # Verify that the circuit breaker is in closed state again
    assertEqual "CLOSED" "$($EXEC wget product-composite:${MGM_PORT}/actuator/health -qO - | jq -r .components.circuitBreakers.details.product.details.state)"

    # Verify that the expected state transitions happened in the circuit breaker
    assertEqual "CLOSED_TO_OPEN"      "$($EXEC wget product-composite:${MGM_PORT}/actuator/circuitbreakerevents/product/STATE_TRANSITION -qO - | jq -r .circuitBreakerEvents[-3].stateTransition)"
    assertEqual "OPEN_TO_HALF_OPEN"   "$($EXEC wget product-composite:${MGM_PORT}/actuator/circuitbreakerevents/product/STATE_TRANSITION -qO - | jq -r .circuitBreakerEvents[-2].stateTransition)"
    assertEqual "HALF_OPEN_TO_CLOSED" "$($EXEC wget product-composite:${MGM_PORT}/actuator/circuitbreakerevents/product/STATE_TRANSITION -qO - | jq -r .circuitBreakerEvents[-1].stateTransition)"

    # Shutdown the client pod if we are using Kubernetes, i.e. not runnig on localhost.
    if [ "$HOST" != "localhost" ]
    then
        kubectl -n $ns delete pod alpine-client --grace-period=1
    fi
}

set -e

echo "Start Tests:" `date`

echo "HOST=${HOST}"
echo "PORT=${PORT}"
echo "HEALTH_URL=${HEALTH_URL}"
echo "MGM_PORT=${MGM_PORT}"
echo "SKIP_CB_TESTS=${SKIP_CB_TESTS}"

if [[ $@ == *"start"* ]]
then
    echo "Restarting the test environment..."
    echo "$ docker-compose down --remove-orphans"
    docker-compose down --remove-orphans
    echo "$ docker-compose up -d"
    docker-compose up -d
fi

waitForService curl -k $HEALTH_URL:$MGM_PORT/actuator/health

ACCESS_TOKEN=$(curl -k https://writer:secret@$HOST:$PORT/oauth/token -d grant_type=password -d username=magnus -d password=password -s | jq .access_token -r)
AUTH="-H \"Authorization: Bearer $ACCESS_TOKEN\""

setupTestdata

waitForMessageProcessing

# Verify that a normal request works, expect three recommendations and three reviews
assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS $AUTH -s"
assertEqual "$PROD_ID_REVS_RECS" $(echo $RESPONSE | jq .productId)
assertEqual 3 $(echo $RESPONSE | jq ".recommendations | length")
assertEqual 3 $(echo $RESPONSE | jq ".reviews | length")

# Verify that a 404 (Not Found) error is returned for a non existing productId ($PROD_ID_NOT_FOUND)
assertCurl 404 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_NOT_FOUND $AUTH -s"

# Verify that no recommendations are returned for productId $PROD_ID_NO_RECS
assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_NO_RECS $AUTH -s"
assertEqual "$PROD_ID_NO_RECS" $(echo $RESPONSE | jq .productId)
assertEqual 0 $(echo $RESPONSE | jq ".recommendations | length")
assertEqual 3 $(echo $RESPONSE | jq ".reviews | length")

# Verify that no reviews are returned for productId $PROD_ID_NO_REVS
assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_NO_REVS $AUTH -s"
assertEqual $PROD_ID_NO_REVS $(echo $RESPONSE | jq .productId)
assertEqual 3 $(echo $RESPONSE | jq ".recommendations | length")
assertEqual 0 $(echo $RESPONSE | jq ".reviews | length")

# Verify that a 422 (Unprocessable Entity) error is returned for a productId that is out of range (-1)
assertCurl 422 "curl -k https://$HOST:$PORT/product-composite/-1 $AUTH -s"
assertEqual "\"Invalid productId: -1\"" "$(echo $RESPONSE | jq .message)"

# Verify that a 400 (Bad Request) error error is returned for a productId that is not a number, i.e. invalid format
assertCurl 400 "curl -k https://$HOST:$PORT/product-composite/invalidProductId $AUTH -s"
assertEqual "\"Type mismatch.\"" "$(echo $RESPONSE | jq .message)"

# Verify that a request without access token fails on 401, Unauthorized
assertCurl 401 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS -s"

# Verify that the reader - client with only read scope can call the read API but not delete API.
READER_ACCESS_TOKEN=$(curl -k https://reader:secret@$HOST:$PORT/oauth/token -d grant_type=password -d username=magnus -d password=password -s | jq .access_token -r)
READER_AUTH="-H \"Authorization: Bearer $READER_ACCESS_TOKEN\""

assertCurl 200 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS $READER_AUTH -s"
assertCurl 403 "curl -k https://$HOST:$PORT/product-composite/$PROD_ID_REVS_RECS $READER_AUTH -X DELETE -s"

if [[ $SKIP_CB_TESTS == "false" ]]
then
    testCircuitBreaker
fi

echo "End, all tests OK:" `date`

if [[ $@ == *"stop"* ]]
then
    echo "Stopping the test environment..."
    echo "$ docker-compose down --remove-orphans"
    docker-compose down --remove-orphans
fi