#!/bin/bash

# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -o errexit
set -o nounset
set -o pipefail

KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
source "${KUBE_ROOT}/hack/lib/init.sh"

kube::golang::setup_env

kube::test::find_dirs() {
  (
    cd ${KUBE_ROOT}
    find . -not \( \
        \( \
          -wholename './output' \
          -o -wholename './_output' \
          -o -wholename './release' \
          -o -wholename './target' \
          -o -wholename '*/third_party/*' \
          -o -wholename '*/Godeps/*' \
        \) -prune \
      \) -name '*_test.go' -print0 | xargs -0n1 dirname | sed 's|^\./||' | sort -u
  )
}

kube::test::find_pkgs() {
  kube::test::find_dirs | xargs -n1 printf "${KUBE_GO_PACKAGE}/%s\n"
}

# -covermode=atomic becomes default with -race in Go >=1.3
KUBE_TIMEOUT=${KUBE_TIMEOUT:--timeout 120s}
KUBE_COVER=${KUBE_COVER:-} # use KUBE_COVER="-cover -covermode=atomic" for full coverage
KUBE_RACE=${KUBE_RACE:-}   # use KUBE_RACE="-race" to enable race testing

kube::test::usage() {
  kube::log::usage_from_stdin <<EOF
usage: $0 [OPTIONS] [TARGETS]

OPTIONS:
  -i <number>   : number of times to run each test, must be >= 1
EOF
}

isnum() {
  [[ "$1" =~ ^[0-9]+$ ]]
}

iterations=1
while getopts "hi:" opt ; do
  case $opt in
    h)
      kube::test::usage
      exit 0
      ;;
    i)
      iterations="$OPTARG"
      if ! isnum "${iterations}" || [[ "${iterations}" -le 0 ]]; then
        kube::log::usage "'$0': argument to -i must be numeric and greater than 0"
        kube::test::usage
        exit 1
      fi
      ;;
    ?)
      kube::test::usage
      exit 1
      ;;
    :)
      kube::log::usage "Option -$OPTARG <value>"
      kube::test::usage
      exit 1
      ;;
  esac
done
shift $((OPTIND - 1))

# Use eval to preserve embedded quoted strings.
eval "goflags=(${KUBE_GOFLAGS:-})"

# Filter out arguments that start with "-" and move them to goflags.
testcases=()
for arg; do
  if [[ "${arg}" == -* ]]; then
    goflags+=("${arg}")
  else
    testcases+=("${arg}")
  fi
done
set -- "${testcases[@]+${testcases[@]}}"

if [[ $iterations -gt 1 ]]; then
  if [[ $# -eq 0 ]]; then
    set -- $(kube::test::find_dirs)
  fi
  kube::log::status "Running ${iterations} times"
  fails=0
  for arg; do
    trap 'exit 1' SIGINT
    pkg=${KUBE_GO_PACKAGE}/${arg}
    kube::log::status "${pkg}"
    # keep going, even if there are failures
    pass=0
    count=0
    for i in $(seq 1 ${iterations}); do
      if go test "${goflags[@]:+${goflags[@]}}" \
          ${KUBE_RACE} ${KUBE_TIMEOUT} "${pkg}"; then
        pass=$((pass + 1))
      else
        fails=$((fails + 1))
      fi
      count=$((count + 1))
    done 2>&1
    kube::log::status "${pass} / ${count} passed"
  done
  if [[ ${fails} -gt 0 ]]; then
    exit 1
  else
    exit 0
  fi
fi

if [[ -n "${1-}" ]]; then
  covdir="/tmp/k8s_coverage/$(kube::util::sortable_date)"
  kube::log::status "Saving coverage output in '${covdir}'"
  for arg; do
    trap 'exit 1' SIGINT
    mkdir -p "${covdir}/${arg}"
    pkg=${KUBE_GO_PACKAGE}/${arg}
    go test "${goflags[@]:+${goflags[@]}}" \
        ${KUBE_RACE} \
        ${KUBE_TIMEOUT} \
        ${KUBE_COVER} -coverprofile="${covdir}/${arg}/coverage.out" \
        "${pkg}"
  done
  exit 0
fi

kube::test::find_pkgs | xargs go test "${goflags[@]:+${goflags[@]}}" \
    ${KUBE_RACE} \
    ${KUBE_TIMEOUT} \
    ${KUBE_COVER}
