self-contained "testing" infrastructure

tests/unit/service.bats

@@ -1,37 +1,6 @@
 #!/usr/bin/env bats
-export SERVICE=redis
 
-flunk() {
-  { if [ "$#" -eq 0 ]; then cat -
-    else echo "$*"
-    fi
-  }
-  return 1
-}
-
-assert_success() {
-  if [ "$status" -ne 0 ]; then
-    flunk "command failed with exit status $status"
-  elif [ "$#" -gt 0 ]; then
-    assert_output "$1"
-  fi
-}
-
-assert_equal() {
-  if [ "$1" != "$2" ]; then
-    { echo "expected: $1"
-      echo "actual:   $2"
-    } | flunk
-  fi
-}
-
-assert_output() {
-  local expected
-  if [ $# -eq 0 ]; then expected="$(cat -)"
-  else expected="$1"
-  fi
-  assert_equal "$expected" "$output"
-}
+load test_helper
 
 @test "(service) dokku" {
   dokku $SERVICE:create l

tests/unit/test_helper.bash

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+
+export DOKKU_QUIET_OUTPUT=1
+export DOKKU_ROOT="tests/dokku"
+export DOKKU_VERSION=${DOKKU_VERSION:-"master"}
+export PATH="$(dirname $0)/../dokku:$PATH"
+export PLUGIN_PATH="$DOKKU_ROOT/plugins"
+export SERVICE=redis
+
+flunk() {
+  { if [ "$#" -eq 0 ]; then cat -
+    else echo "$*"
+    fi
+  }
+  return 1
+}
+
+assert_equal() {
+  if [ "$1" != "$2" ]; then
+    { echo "expected: $1"
+      echo "actual:   $2"
+    } | flunk
+  fi
+}
+
+assert_exit_status() {
+  assert_equal "$status" "$1"
+}
+
+assert_success() {
+  if [ "$status" -ne 0 ]; then
+    flunk "command failed with exit status $status"
+  elif [ "$#" -gt 0 ]; then
+    assert_output "$1"
+  fi
+}
+
+assert_exists() {
+  if [ ! -f "$1" ]; then
+    flunk "expected file to exist: $1"
+  fi
+}
+
+assert_contains() {
+  if [[ "$1" != *"$2"* ]]; then
+    flunk "expected $2 to be in: $1"
+  fi
+}
+
+assert_output() {
+  local expected
+  if [ $# -eq 0 ]; then expected="$(cat -)"
+  else expected="$1"
+  fi
+  assert_equal "$expected" "$output"
+}