Initial bats based integration tests for testing daemon network configs

Pre-reqs :
* docker machine (https://github.com/docker/machine)
* bats (https://github.com/sstephenson/bats)
* virtualbox

Signed-off-by: Madhu Venugopal <[email protected]>

test/integration/README.md

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+# LibNetwork Integration Tests
+
+Integration tests provide end-to-end testing of LibNetwork and Drivers.
+
+While unit tests verify the code is working as expected by relying on mocks and
+artificially created fixtures, integration tests actually use real docker
+engines and communicate to it through the CLI.
+
+Note that integration tests do **not** replace unit tests and Docker is used as a good use-case.
+
+As a rule of thumb, code should be tested thoroughly with unit tests.
+Integration tests on the other hand are meant to test a specific feature end to end.
+
+Integration tests are written in *bash* using the
+[bats](https://github.com/sstephenson/bats) framework.
+
+## Pre-Requisites
+
+1. Bats (https://github.com/sstephenson/bats#installing-bats-from-source)
+2. Docker Machine (https://github.com/docker/machine)
+3. Virtualbox (as a Docker machine driver)
+
+## Running integration tests
+
+* Start by [installing] (https://github.com/sstephenson/bats#installing-bats-from-source) *bats* on your system.
+* If not done already, [install](https://docs.docker.com/machine/) *docker-machine* into /usr/bin
+* Make sure Virtualbox is installed as well, which will be used by docker-machine as a driver to launch VMs
+
+In order to run all integration tests, pass *bats* the test path:
+```
+$ bats test/integration/daemon-configs.bats
+```
+
+

test/integration/daemon-configs.bats

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+#!/usr/bin/env bats
+
+load helpers
+
+export DRIVER=virtualbox
+export NAME="bats-$DRIVER-daemon-configs"
+export MACHINE_STORAGE_PATH=/tmp/machine-bats-daemon-test-$DRIVER
+# Default memsize is 1024MB and disksize is 20000MB
+# These values are defined in drivers/virtualbox/virtualbox.go
+export DEFAULT_MEMSIZE=1024
+export DEFAULT_DISKSIZE=20000
+export CUSTOM_MEMSIZE=1536
+export CUSTOM_DISKSIZE=10000
+export CUSTOM_CPUCOUNT=1
+export BAD_URL="http://dev.null:9111/bad.iso"
+
+function setup() {
+  # add sleep because vbox; ugh
+  sleep 1
+}
+
+findDiskSize() {
+  # SATA-0-0 is usually the boot2disk.iso image
+  # We assume that SATA 1-0 is root disk VMDK and grab this UUID
+  # e.g. "SATA-ImageUUID-1-0"="fb5f33a7-e4e3-4cb9-877c-f9415ae2adea"
+  # TODO(slashk): does this work on Windows ?
+  run bash -c "VBoxManage showvminfo --machinereadable $NAME | grep SATA-ImageUUID-1-0 | cut -d'=' -f2"
+  run bash -c "VBoxManage showhdinfo $output | grep "Capacity:" | awk -F' ' '{ print $2 }'"
+}
+
+findMemorySize() {
+  run bash -c "VBoxManage showvminfo --machinereadable $NAME | grep memory= | cut -d'=' -f2"
+}
+
+findCPUCount() {
+  run bash -c "VBoxManage showvminfo --machinereadable $NAME | grep cpus= | cut -d'=' -f2"
+}
+
+buildMachineWithOldIsoCheckUpgrade() {
+  run wget https://github.com/boot2docker/boot2docker/releases/download/v1.4.1/boot2docker.iso -O $MACHINE_STORAGE_PATH/cache/boot2docker.iso
+  run machine create -d virtualbox $NAME
+  run machine upgrade $NAME
+}
+
+@test "$DRIVER: machine should not exist" {
+  run machine active $NAME
+  [ "$status" -eq 1  ]
+}
+
+@test "$DRIVER: VM should not exist" {
+  run VBoxManage showvminfo $NAME
+  [ "$status" -eq 1  ]
+}
+
+@test "$DRIVER: create" {
+  run machine create -d $DRIVER $NAME
+  [ "$status" -eq 0  ]
+}
+
+@test "$DRIVER: active" {
+  run machine active $NAME
+  [ "$status" -eq 0  ]
+}
+
+@test "$DRIVER: check default machine memory size" {
+  findMemorySize
+  [[ ${output} == "${DEFAULT_MEMSIZE}"  ]]
+}
+
+@test "$DRIVER: check default machine disksize" {
+  findDiskSize
+  [[ ${output} == *"$DEFAULT_DISKSIZE"* ]]
+}
+
+@test "$DRIVER: test bridge-ip" {
+  run machine ssh $NAME sudo /etc/init.d/docker stop
+  run machine ssh $NAME sudo ifconfig docker0 down
+  run machine ssh $NAME sudo ip link delete docker0
+  BIP='--bip=172.168.45.1/24'
+  set_extra_config $BIP
+  cat ${TMP_EXTRA_ARGS_FILE} | machine ssh $NAME sudo tee /var/lib/boot2docker/profile
+  cat ${DAEMON_CFG_FILE} | machine ssh $NAME "sudo tee -a /var/lib/boot2docker/profile"
+  run machine ssh $NAME sudo /etc/init.d/docker start
+  run machine ssh $NAME ifconfig docker0
+  [ "$status" -eq 0  ]
+  [[ ${lines[1]} =~ "172.168.45.1"  ]]
+}
+
+@test "$DRIVER: run busybox container" {
+  run machine ssh $NAME sudo cat /var/lib/boot2docker/profile
+  run docker $(machine config $NAME) run busybox echo hello world
+  [ "$status" -eq 0  ]
+}
+
+@test "$DRIVER: remove machine" {
+  run machine rm -f $NAME
+}
+
+# Cleanup of machine store should always be the last 'test'
+@test "$DRIVER: cleanup" {
+  run rm -rf $MACHINE_STORAGE_PATH
+  [ "$status" -eq 0  ]
+}
+

test/integration/daemon.cfg

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+CACERT=/var/lib/boot2docker/ca.pem
+SERVERCERT=/var/lib/boot2docker/server-key.pem
+SERVERKEY=/var/lib/boot2docker/server.pem
+DOCKER_TLS=no

test/integration/helpers.bash

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+#!/bin/bash
+
+# Root directory of the repository.
+MACHINE_ROOT=/usr/bin
+
+PLATFORM=`uname -s | tr '[:upper:]' '[:lower:]'`
+ARCH=`uname -m`
+
+if [ "$ARCH" = "x86_64" ]; then
+    ARCH="amd64"
+else
+    ARCH="386"
+fi
+MACHINE_BIN_NAME=docker-machine_$PLATFORM-$ARCH
+BATS_LOG=/tmp/bats.log
+
+touch ${BATS_LOG}
+rm ${BATS_LOG}
+
+teardown() {
+  echo "$BATS_TEST_NAME
+----------
+$output
+----------
+
+" >> ${BATS_LOG}
+}
+
+EXTRA_ARGS_CFG='EXTRA_ARGS'
+EXTRA_ARGS='--tlsverify --tlscacert=/var/lib/boot2docker/ca.pem --tlskey=/var/lib/boot2docker/server-key.pem --tlscert=/var/lib/boot2docker/server.pem --label=provider=virtualbox -H tcp://0.0.0.0:2376'
+TMP_EXTRA_ARGS_FILE=/tmp/tmp_extra_args
+DAEMON_CFG_FILE=${BATS_TEST_DIRNAME}/daemon.cfg
+set_extra_config() {
+  if [ -f ${TMP_EXTRA_ARGS_FILE} ];
+  then
+    rm ${TMP_EXTRA_ARGS_FILE}
+  fi
+  echo -n "${EXTRA_ARGS_CFG}='"  > ${TMP_EXTRA_ARGS_FILE}
+  echo -n "$1 "  >> ${TMP_EXTRA_ARGS_FILE}
+  echo "${EXTRA_ARGS}'"  >> ${TMP_EXTRA_ARGS_FILE}
+}
+
+if [ ! -e $MACHINE_ROOT/$MACHINE_BIN_NAME ]; then
+  echo "${MACHINE_ROOT}/${MACHINE_BIN_NAME} not found"
+  exit 1
+fi
+
+function machine() {
+    ${MACHINE_ROOT}/$MACHINE_BIN_NAME "$@"
+}