Add test for push-to-trunk script.

This is a prototype attempt for testing the push-to-trunk script. There are several todos left, but it is not clear if it is worth investing time into those. The test is meant to aid in verifying modifications in the push-to-trunk script.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/32283002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17308 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/test-push-to-trunk.sh

+#!/bin/bash
+# Copyright 2013 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Tests the push-to-trunk.sh script. Needs to be run in V8 base dir:
+# ./tools/test-push-to-trunk.sh
+
+# TODO(machenbach): Check automatically if expectations match.
+# TODO(machenbach): Mock out version number retrieval.
+# TODO(machenbach): Allow multiple different test cases.
+# TODO(machenbach): Allow multi line mock output.
+# TODO(machenbach): Represent test expectations/mock output without an array
+# index increment.
+
+########## Stdin for push-to-trunk.sh
+
+# Confirm push to trunk commit ID
+INPUT[0]="Y"
+# Open editor
+INPUT[1]=""
+# Confirm increment version number
+INPUT[2]="Y"
+# Reviewer for V8 CL
+INPUT[3]="reviewer@chromium.org"
+# Enter LGTM for V8 CL
+INPUT[4]="LGTM"
+# Confirm checkout sanity
+INPUT[5]="Y"
+# Manually type in trunk revision
+INPUT[6]="12345"
+# Reviewer for Chromium CL
+INPUT[7]="reviewer@chromium.org"
+
+########## Expected commands and mock output
+
+EXP[0]="git status -s -uno"
+OUT[0]=""
+EXP[1]="git status -s -b -uno"
+OUT[1]="## some_branch"
+EXP[2]="git svn fetch"
+OUT[2]=""
+EXP[3]="git branch"
+OUT[3]="not the temp branch"
+EXP[4]="git checkout -b prepare-push-temporary-branch-created-by-script"
+OUT[4]=""
+EXP[5]="git branch"
+OUT[5]="not the branch"
+EXP[6]="git branch"
+OUT[6]="not the trunk branch"
+EXP[7]="git checkout -b prepare-push svn/bleeding_edge"
+OUT[7]=""
+EXP[8]="git log -1 --format=%H ChangeLog"
+OUT[8]="hash1"
+EXP[9]="git log -1 hash1"
+OUT[9]=""
+EXP[10]="git log hash1..HEAD --format=%H"
+OUT[10]="hash2"
+EXP[11]="git log -1 hash2 --format=\"%w(80,8,8)%s\""
+OUT[11]="Log line..."
+EXP[12]="git log -1 hash2 --format=\"%B\""
+OUT[12]="BUG=6789"
+EXP[13]="git log -1 hash2 --format=\"%w(80,8,8)(%an)\""
+OUT[13]="   (author@chromium.org)"
+EXP[14]="git commit -a -m \"Prepare push to trunk.  Now working on version 3.4.5.\""
+OUT[14]=""
+EXP[15]="git cl upload -r reviewer@chromium.org --send-mail"
+OUT[15]=""
+EXP[16]="git cl dcommit"
+OUT[16]=""
+EXP[17]="git svn fetch"
+OUT[17]=""
+EXP[18]="git checkout svn/bleeding_edge"
+OUT[18]=""
+EXP[19]="git log -1 --format=%H --grep=Prepare push to trunk.  Now working on version 3.4.5."
+OUT[19]="hash3"
+EXP[20]="git diff svn/trunk"
+OUT[20]="patch1"
+EXP[21]="git checkout -b trunk-push svn/trunk"
+OUT[21]=""
+EXP[22]="git apply --index --reject /tmp/v8-push-to-trunk-tempfile-patch"
+OUT[22]=""
+EXP[23]="git add src/version.cc"
+OUT[23]=""
+EXP[24]="git commit -F /tmp/v8-push-to-trunk-tempfile-commitmsg"
+OUT[24]=""
+EXP[25]="git svn dcommit"
+OUT[25]="r1234"
+EXP[26]="git svn tag 3.4.5 -m \"Tagging version 3.4.5\""
+OUT[26]=""
+EXP[27]="git status -s -uno"
+OUT[27]=""
+EXP[28]="git checkout master"
+OUT[28]=""
+EXP[29]="git pull"
+OUT[29]=""
+EXP[30]="git checkout -b v8-roll-12345"
+OUT[30]=""
+EXP[31]="git commit -am Update V8 to version 3.4.5."
+OUT[31]=""
+EXP[32]="git cl upload --send-mail"
+OUT[32]=""
+EXP[33]="git checkout -f some_branch"
+OUT[33]=""
+EXP[34]="git branch -D prepare-push-temporary-branch-created-by-script"
+OUT[34]=""
+EXP[35]="git branch -D prepare-push"
+OUT[35]=""
+EXP[36]="git branch -D trunk-push"
+OUT[36]=""
+
+########## Global temp files for test input/output
+
+export TEST_OUTPUT=$(mktemp)
+export INDEX=$(mktemp)
+export MOCK_OUTPUT=$(mktemp)
+export EXPECTED_COMMANDS=$(mktemp)
+
+########## Command index
+
+inc_index() {
+  local I="$(command cat $INDEX)"
+  let "I+=1"
+  echo "$I" > $INDEX
+  echo $I
+}
+
+echo "-1" > $INDEX
+export -f inc_index
+
+########## Mock output accessor
+
+get_mock_output() {
+  local I=$1
+  let "I+=1"
+  command sed "${I}q;d" $MOCK_OUTPUT
+}
+
+export -f get_mock_output
+
+for E in "${OUT[@]}"; do
+  echo $E
+done > $MOCK_OUTPUT
+
+########## Expected commands accessor
+
+get_expected_command() {
+  local I=$1
+  let "I+=1"
+  command sed "${I}q;d" $EXPECTED_COMMANDS
+}
+
+export -f get_expected_command
+
+for E in "${EXP[@]}"; do
+  echo $E
+done > $EXPECTED_COMMANDS
+
+########## Mock commands
+
+git() {
+  # All calls to git are mocked out. Expected calls and mock output are stored
+  # in the EXP/OUT arrays above.
+  local I=$(inc_index)
+  local OUT=$(get_mock_output $I)
+  local EXP=$(get_expected_command $I)
+  echo "#############################" >> $TEST_OUTPUT
+  echo "Com. Index:  $I" >> $TEST_OUTPUT
+  echo "Expected:    ${EXP}" >> $TEST_OUTPUT
+  echo "Actual:      git $@" >> $TEST_OUTPUT
+  echo "Mock Output: ${OUT}" >> $TEST_OUTPUT
+  echo "${OUT}"
+}
+
+mv() {
+  echo "#############################" >> $TEST_OUTPUT
+  echo "mv $@" >> $TEST_OUTPUT
+}
+
+sed() {
+  # Only calls to sed * -i * are mocked out.
+  echo "#############################" >> $TEST_OUTPUT
+  local arr=$@
+  if [[ "${arr[@]}" =~ "-i" || "${arr[${#arr[@]}-1]}" == "-i" ]]; then
+    echo "sed $@" >> $TEST_OUTPUT
+  else
+    echo "sed $@" >> $TEST_OUTPUT
+    command sed "$@"
+  fi
+}
+
+editor() {
+  echo "#############################" >> $TEST_OUTPUT
+  echo "editor $@" >> $TEST_OUTPUT
+}
+
+cd() {
+  echo "#############################" >> $TEST_OUTPUT
+  echo "cd $@" >> $TEST_OUTPUT
+}
+
+export -f git
+export -f mv
+export -f sed
+export -f cd
+export -f editor
+export EDITOR=editor
+
+########## Invoke script with test stdin
+
+for i in "${INPUT[@]}"; do 
+    echo $i
+done | tools/push-to-trunk.sh -c "path/to/chromium"
+
+echo "Collected output:"
+command cat $TEST_OUTPUT
+
+########## Clean up
+
+rm -rf $TEST_OUTPUT
+rm -rf $INDEX
+rm -rf $MOCK_OUTPUT
+rm -rf $EXPECTED_COMMANDS