Reorganize tests

* Split out test helper functions into tools/test_functions.sh
  * bin/_blackbox_common_test.sh: Unit-tests for functions.
  * blackbox_postdeploy: Use cp_permissions instead of chmod --reference

tools/test_functions.sh

@@ -0,0 +1,134 @@
+#!/usr/bin/env bash
+
+function PHASE() {
+  echo '********************'
+  echo '********************'
+  echo '*********' """$@"""
+  echo '********************'
+  echo '********************'
+}
+
+function md5sum_file() {
+  # Portably generate the MD5 hash of file $1.
+  case $(uname -s) in
+    Darwin )
+      md5 -r "$1" | awk '{ print $1 }'
+      ;;
+    Linux )
+      md5sum "$1" | awk '{ print $1 }'
+      ;;
+    CYGWIN* )
+      md5sum "$1" | awk '{ print $1 }'
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+}
+
+function assert_file_missing() {
+  if [[ -e "$1" ]]; then
+    echo "ASSERT FAILED: ${1} should not exist."
+    exit 1
+  fi
+}
+
+function assert_file_exists() {
+  if [[ ! -e "$1" ]]; then
+    echo "ASSERT FAILED: ${1} should exist."
+    echo "PWD=$(/bin/pwd -P)"
+    #echo "LS START"
+    #ls -la
+    #echo "LS END"
+    exit 1
+  fi
+}
+function assert_file_md5hash() {
+  local file="$1"
+  local wanted="$2"
+  assert_file_exists "$file"
+  local found
+  found=$(md5sum_file "$file")
+  if [[ "$wanted" != "$found" ]]; then
+    echo "ASSERT FAILED: $file hash wanted=$wanted found=$found"
+    exit 1
+  fi
+}
+function assert_file_group() {
+  local file="$1"
+  local wanted="$2"
+  local found
+  assert_file_exists "$file"
+
+  case $(uname -s) in
+    Darwin|FreeBSD )
+      found=$(stat -f '%Sg' "$file")
+      ;;
+    Linux )
+      found=$(stat -c '%G' "$file")
+      ;;
+    CYGWIN* )
+      echo "ASSERT_FILE_GROUP: Running on Cygwin. Not being tested."
+      return 0
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+
+  if [[ "$wanted" != "$found" ]]; then
+    echo "ASSERT FAILED: $file chgrp wanted=$wanted found=$found"
+    exit 1
+  fi
+}
+function assert_file_perm() {
+  local wanted="$1"
+  local file="$2"
+  local found
+  assert_file_exists "$file"
+
+  case $(uname -s) in
+    Darwin|FreeBSD )
+      found=$(stat -f '%Sp' "$file")
+      ;;
+    # NB(tlim): CYGWIN hasn't been tested. It might be more like Darwin.
+    Linux | CYGWIN* )
+      found=$(stat -c '%A' "$file")
+      ;;
+    * )
+      echo 'ERROR: Unknown OS. Exiting.'
+      exit 1
+      ;;
+  esac
+
+  if [[ "$wanted" != "$found" ]]; then
+    echo "ASSERT FAILED: $file chgrp wanted=$wanted found=$found"
+    exit 1
+  fi
+}
+function assert_line_not_exists() {
+  local target="$1"
+  local file="$2"
+  assert_file_exists "$file"
+  if grep -F -x -s -q >/dev/null "$target" "$file" ; then
+    echo "ASSERT FAILED: line '$target' should not exist in file $file"
+    echo "==== file contents: START $file"
+    cat "$file"
+    echo "==== file contents: END $file"
+    exit 1
+  fi
+}
+function assert_line_exists() {
+  local target="$1"
+  local file="$2"
+  assert_file_exists "$file"
+  if ! grep -F -x -s -q >/dev/null "$target" "$file" ; then
+    echo "ASSERT FAILED: line '$target' should exist in file $file"
+    echo "==== file contents: START $file"
+    cat "$file"
+    echo "==== file contents: END $file"
+    exit 1
+  fi
+}