sample app to test the builder

test/hello-world/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+  "fmt"
+  "net/http"
+)
+
+const (
+  port = ":8080"
+)
+
+func HelloWorld(w http.ResponseWriter, r *http.Request) {
+  fmt.Println(w, "Hello, world !")
+}
+
+func main() {
+  fmt.Printf("Started server on port %v.\n", port)
+  http.HandleFunc("/", HelloWorld)
+  http.ListenAndServe(port, nil)
+}

test/run

@@ -0,0 +1,159 @@
+#!/bin/bash
+#
+# The 'run' performs a simple test that verifies the S2I image.
+# The main focus here is to exercise the S2I scripts.
+#
+# For more information see the documentation:
+# https://github.com/openshift/source-to-image/blob/master/docs/builder_image.md
+#
+# IMAGE_NAME specifies a name of the candidate image used for testing.
+# The image has to be available before this script is executed.
+#
+IMAGE_NAME=${IMAGE_NAME-golang-centos-candidate}
+
+# Determining system utility executables (darwin compatibility check)
+READLINK_EXEC="readlink"
+MKTEMP_EXEC="mktemp"
+if [[ "$OSTYPE" =~ 'darwin' ]]; then
+  ! type -a "greadlink" &>"/dev/null" || READLINK_EXEC="greadlink"
+  ! type -a "gmktemp" &>"/dev/null" || MKTEMP_EXEC="gmktemp"
+fi
+
+test_dir="$($READLINK_EXEC -zf $(dirname "${BASH_SOURCE[0]}"))"
+image_dir=$($READLINK_EXEC -zf ${test_dir}/..)
+cid_file=$($MKTEMP_EXEC -u --suffix=.cid)
+
+# Since we built the candidate image locally, we don't want S2I to attempt to pull
+# it from Docker hub
+s2i_args="--pull-policy=never --loglevel=2"
+
+# Port the image exposes service to be tested
+test_port=8080
+
+image_exists() {
+  docker inspect $1 &>/dev/null
+}
+
+container_exists() {
+  image_exists $(cat $cid_file)
+}
+
+container_ip() {
+  if [ ! -z "$DOCKER_HOST" ] && [[ "$OSTYPE" =~ 'darwin' ]]; then
+    docker-machine ip
+  else
+    docker inspect --format="{{ .NetworkSettings.IPAddress }}" $(cat $cid_file)
+  fi
+}
+
+container_port() {
+  if [ ! -z "$DOCKER_HOST" ] && [[ "$OSTYPE" =~ 'darwin' ]]; then
+    docker inspect --format="{{(index .NetworkSettings.Ports \"$test_port/tcp\" 0).HostPort}}" "$(cat "${cid_file}")"
+  else
+    echo $test_port
+  fi
+}
+
+run_s2i_build() {
+  s2i build --incremental=true ${s2i_args} file://${test_dir}/test-app ${IMAGE_NAME} ${IMAGE_NAME}-testapp
+}
+
+prepare() {
+  if ! image_exists ${IMAGE_NAME}; then
+    echo "ERROR: The image ${IMAGE_NAME} must exist before this script is executed."
+    exit 1
+  fi
+  # s2i build requires the application is a valid 'Git' repository
+  pushd ${test_dir}/test-app >/dev/null
+  git init
+  git config user.email "build@localhost" && git config user.name "builder"
+  git add -A && git commit -m "Sample commit"
+  popd >/dev/null
+  run_s2i_build
+}
+
+run_test_application() {
+  docker run --rm --cidfile=${cid_file} -p ${test_port} ${IMAGE_NAME}-testapp
+}
+
+cleanup() {
+  if [ -f $cid_file ]; then
+    if container_exists; then
+      docker stop $(cat $cid_file)
+    fi
+  fi
+  if image_exists ${IMAGE_NAME}-testapp; then
+    docker rmi ${IMAGE_NAME}-testapp
+  fi
+}
+
+check_result() {
+  local result="$1"
+  if [[ "$result" != "0" ]]; then
+    echo "S2I image '${IMAGE_NAME}' test FAILED (exit code: ${result})"
+    cleanup
+    exit $result
+  fi
+}
+
+wait_for_cid() {
+  local max_attempts=10
+  local sleep_time=1
+  local attempt=1
+  local result=1
+  while [ $attempt -le $max_attempts ]; do
+    [ -f $cid_file ] && break
+    echo "Waiting for container to start..."
+    attempt=$(( $attempt + 1 ))
+    sleep $sleep_time
+  done
+}
+
+test_usage() {
+  echo "Testing 's2i usage'..."
+  s2i usage ${s2i_args} ${IMAGE_NAME} &>/dev/null
+}
+
+test_connection() {
+  echo "Testing HTTP connection (http://$(container_ip):$(container_port))"
+  local max_attempts=10
+  local sleep_time=1
+  local attempt=1
+  local result=1
+  while [ $attempt -le $max_attempts ]; do
+    echo "Sending GET request to http://$(container_ip):$(container_port)/"
+    response_code=$(curl -s -w %{http_code} -o /dev/null http://$(container_ip):$(container_port)/)
+    status=$?
+    if [ $status -eq 0 ]; then
+      if [ $response_code -eq 200 ]; then
+        result=0
+      fi
+      break
+    fi
+    attempt=$(( $attempt + 1 ))
+    sleep $sleep_time
+  done
+  return $result
+}
+
+# Build the application image twice to ensure the 'save-artifacts' and
+# 'restore-artifacts' scripts are working properly
+prepare
+run_s2i_build
+check_result $?
+
+# Verify the 'usage' script is working properly
+test_usage
+check_result $?
+
+# Verify that the HTTP connection can be established to test application container
+run_test_application &
+
+# Wait for the container to write its CID file
+wait_for_cid
+
+test_connection
+check_result $?
+
+cleanup
+