Add travis test cases

Signed-off-by: Qi Zheng <qi.zheng@intel.com>

tests/Makefile

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+HOSTNAME := $(shell hostname -f)
+SUBDIR = $(shell ls -d */)
+
+test_units := $(patsubst %/,%,$(SUBDIR))
+
+all:
+	@echo "use 'make tests' to run all tests'"
+	@echo "use 'make TEST' to run individual test: ${test_units}"
+
+.PHONY: $(test_units)
+$(test_units): 
+	cd $@; bats -t $@.bats
+
+.NOTPARALLEL: tests
+tests: $(test_units)

tests/README.md

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+# Clear Linux micro services unit test
+
+These are the collections of the Clear Linux micro services unit test.
+The micro services are from [page](https://github.com/clearlinux/dockerfiles).
+
+All the unit tests are writing based on BATS  [page](https://github.com/sstephenson/bats).
+
+To run the tests, you can simple type "make tests", it will run all the test cases.
+If you want to run specific micro service test, just type "make SERVICE-NAME".
+For example, "make redis" to run tests for redis.
+
+

tests/memcached/memcached.bats

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+#!/usr/bin/env bats
+# Copyright (C) 2018 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+load ../utils
+
+
+@test "Start memcached server" {
+    sudo docker run --name memcached-server --rm -d clearlinux/memcached
+    sleep 5
+    run check_container_status memcached-server
+    [ "$status" -eq 0 ]
+}
+
+@test "Accessing statistics" {
+    # get ip address
+    run get_container_ip memcached-server
+    [ "$status" -eq 0 ]
+    ipaddr="$output"
+
+    echo stats | nc $ipaddr 11211
+}
+
+
+@test "Stop memcached server" {
+    sudo docker stop memcached-server
+    sleep 3
+    run check_container_status memcached-server
+    [ "$status" -eq 1 ]
+}

tests/nginx/nginx.bats

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+#!/usr/bin/env bats
+# Copyright (C) 2018 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+load ../utils
+
+
+@test "Start nginx server" {
+    sudo docker run --name nginx-server --rm -d -p 8080:80 clearlinux/nginx
+    sleep 5
+    run check_container_status nginx-server
+    [ "$status" -eq 0 ]
+}
+
+@test "Connecting to nginx server" {
+    curl -svL http://localhost:8080/
+}
+
+@test "Stop nginx server" {
+    sudo docker stop nginx-server
+    sleep 3
+    run check_container_status nginx-server
+    [ "$status" -eq 1 ]
+}

tests/redis/redis.bats

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+#!/usr/bin/env bats
+# Copyright (C) 2018 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+load ../utils
+
+@test "Start redis server" {
+    sudo docker run --name redis-server --rm -d clearlinux/redis redis-server --protected-mode no
+    sleep 5 
+    run check_container_status redis-server
+    [ "$status" -eq 0 ]
+}
+
+@test "Redis LPUSH test" {
+    # get ip address
+    run get_container_ip redis-server
+    [ "$status" -eq 0 ]
+    ipaddr="$output"
+
+    # push two integers
+    sudo docker run --rm clearlinux/redis redis-cli -h $ipaddr lpush mylist x
+    sudo docker run --rm clearlinux/redis redis-cli -h $ipaddr lpush mylist y
+}
+
+@test "Redis LRANGE test" {
+    # get ip address
+    run get_container_ip redis-server
+    [ "$status" -eq 0 ]
+    ipaddr="$output"
+
+    # push two integers
+    sudo docker run --rm clearlinux/redis redis-cli -h $ipaddr lrange mylist 0 -1
+}
+
+
+@test "Stop redis server" {
+    sudo docker stop redis-server
+    sleep 3
+    run check_container_status redis-server
+    [ "$status" -eq 1 ]
+}

tests/utils.bash

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+# Defines helper functions used across a variety of tests.
+
+check_os() {
+    os="unknown"
+    if [ -f "/etc/os-release" ]; then
+        local os_name=$(cat /etc/os-release)
+        if [[ $os_name =~ "Clear Linux" ]]; then
+            os="clearlinux"
+        elif [[ $os_name =~ "Ubuntu" ]]; then
+            os="ubuntu"
+        elif [[ $os_name =~ "CentOS" ]]; then
+            os="centos"
+        else
+            os="unknown"
+        fi
+    fi
+
+    echo $os
+}
+
+# check container status 
+# if no paramter passed, check the latest created docntainer
+# otherwise, check the container name as the parameter
+check_container_status() {
+    if [ -n $1 ]; then
+        sudo docker ps | grep $1 | grep Up
+    else
+        sudo docker ps -l | grep Up
+    fi
+}
+
+# get container IP address
+# param 1, the container name
+get_container_ip() {
+    if [ -n $1 ]; then
+        local ipaddr=$(sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}' $1)
+        echo $ipaddr
+    else
+        echo "Couldn't get IP address for container $1"
+        false
+    fi
+}