Add system test scripts

These tests are written using BATS (Bash Automated Testing System). I
used a very helpful helpers.bash script from the libpod project (Thank
you!) that I tweaked slightly.

#68

test/system/001-basics.bats

@@ -0,0 +1,26 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function setup() {
+  :
+}
+
+function teardown() {
+  :
+}
+
+@test "Output version number using full flag" {
+  skip "Not implemented"
+  run_toolbox --version
+}
+
+@test "Output version number using command" {
+  skip "Not implemented"
+  run_toolbox version
+}
+
+@test "Show usage screen when no command is given" {
+  run_toolbox 1
+  is "${lines[0]}" "toolbox: missing command" "Usage line 1"
+}

test/system/101-create.bats

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+#!/usr/bin/env bats
+
+load helpers
+
+@test "Create the default container." {
+  run_toolbox -y create
+}
+
+@test "Create a container with a valid custom name (whole word)" {
+  run_toolbox -y create -c "customname"
+}
+
+@test "Try to create a container with a bad custom name (with special characters)" {
+  run_toolbox 1 -y create -c "ß[email protected]€"
+  is "${lines[0]}" "toolbox: invalid argument for '--container'" "Toolbox reports invalid argument for --container"
+}
+
+@test "Create a container with a custom image (f29)" {
+  run_toolbox -y create -i fedora-toolbox:29
+}

test/system/102-list.bats

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+#!/usr/bin/env bats
+
+load helpers
+
+@test "Run list with zero containers and zero images" {
+  remove_all_images
+  remove_all_containers
+  run_toolbox list
+  is "$output" "" "Output of list should be blank"
+}
+
+@test "Run list with zero containers (-c flag)" {
+  remove_all_containers
+  run_toolbox list -c
+  is "$output" "" "Output of list should be blank"
+}
+
+@test "Run list with zero images (-i flag)" {
+  remove_all_images
+  run_toolbox list -i
+  is "$output" "" "Output of list should be blank"
+}
+
+@test "Run list with 1 default container and 1 default image" {
+  create_toolbox
+  run_toolbox list
+  is "${lines[1]}" ".*registry.fedoraproject.org/.*" "Default image"
+  is "${lines[3]}" ".*fedora-toolbox-.*" "Default container"
+  is "${#lines[@]}" "4" "Expected length of output is 4"
+}
+
+@test "Run list with 3 containers (-c flag)" {
+  create_toolbox 3 fedora
+  run_toolbox list -c
+  for i in $(seq 1 3); do
+    is "${lines[$i]}" ".*fedora-$((i)) \+" "One of the containers"
+  done
+}
+
+@test "Run list with 3 images (-i flag)" {
+  get_images 3
+  run_toolbox list -i
+  is "${#lines[@]}" "4" "Expected length of output is 4"
+}

test/system/103-remove.bats

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+#!/usr/bin/env bats
+
+load helpers
+
+@test "Remove a specific container (called fedora-2)" {
+  create_toolbox 2 fedora
+  run_toolbox rm fedora-2
+  is "$output" "" "Successfull removal shouldn't print anything"
+}
+
+@test "Remove a specific image (default image called by name)" {
+  get_images 1
+  run_toolbox rmi "$TOOLBOX_DEFAULT_IMAGE"
+}
+
+@test "Try to remove a nonexistent container" {
+  local todelete="nonexistentcontainer"
+  run_toolbox 1 rm "$todelete"
+  is "$output" "toolbox: failed to inspect $todelete" "Toolbox should fail with: no such container"
+}
+
+@test "Try to remove a nonexistent image" {
+  local todelete="nonexistentimage"
+  run_toolbox 1 rmi "$todelete"
+}
+
+@test "Try to remove a running container (called fedora-1)" {
+  create_toolbox 1 fedora
+  run_toolbox run -c fedora-1 echo "WAKE UP"
+  run_toolbox 1 rm fedora-1
+  is "$output" "toolbox: failed to remove container fedora-1" "Toolbox should fail to remove the container"
+}
+
+@test "Remove all containers (2 present)" {
+  create_toolbox 2 fedora
+  run_toolbox rm --all
+  is "$output" "" ""
+}
+
+@test "Remove all images" {
+  get_images 2
+  run_toolbox rmi --all
+}
+
+@test "Try to remove all containers (running containers)" {
+  create_toolbox 2 fedora
+  run_toolbox run -c fedora-1 echo "WAKE UP"
+  run_toolbox run -c fedora-2 echo "WAKE UP"
+  run_toolbox 1 rm --all
+}
+
+@test "Try to remove all images with present containers" {
+  get_images 2
+  create_toolbox 2 fedora
+  run_toolbox 1 rmi --all
+}

test/system/104-run.bats

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+#!/usr/bin/env bats
+
+load helpers
+
+function setup() {
+  setup_with_one_container
+}
+
+@test "Echo 'Hello World' inside of an container" {
+  run_toolbox run echo "Hello World"
+  is "$output" "Hello World" "Should say 'Hello World'"
+}