tests: Alias assert_not_reached() -> fatal()

We had a lot of copies of the "echo something 1>&2; exit 1" code even though
`assert_not_reached()` was it.  Hence, I think we need a shorter alias for that.

Doing this particularly since I noticed a missing `1` in an `exit 1` call in the
rpm-ostree copy of this.

Closes: #648
Approved by: jlebon

tests/basic-test.sh

@@ -26,7 +26,7 @@ echo "ok checkout"
 
 $OSTREE rev-parse test2
 $OSTREE rev-parse 'test2^'
-$OSTREE rev-parse 'test2^^' 2>/dev/null && (echo 1>&2 "rev-parse test2^^ unexpectedly succeeded!"; exit 1)
+$OSTREE rev-parse 'test2^^' 2>/dev/null && fatal "rev-parse test2^^ unexpectedly succeeded!"
 echo "ok rev-parse"
 
 checksum=$($OSTREE rev-parse test2)
@@ -294,7 +294,7 @@ rm repo3/refs/heads/* repo3/refs/remotes/* -rf
 ${CMD_PREFIX} ostree --repo=repo3 prune --refs-only
 find repo3/objects -name '*.commit' > objlist-after-prune
 if cmp -s objlist-before-prune objlist-after-prune; then
-    echo "Prune didn't delete anything!"; exit 1
+    fatal "Prune didn't delete anything!"
 fi
 rm repo3 objlist-before-prune objlist-after-prune -rf
 echo "ok prune"

tests/libtest.sh

@@ -29,9 +29,13 @@ else
   test_builddir=$(dirname $0)
 fi
 
-assert_not_reached () {
+fatal() {
     echo $@ 1>&2; exit 1
 }
+# fatal() is shorter to type, but retain this alias
+assert_not_reached () {
+    fatal "$@"
+}
 
 test_tmpdir=$(pwd)
 
@@ -109,54 +113,51 @@ else
 fi
 
 assert_streq () {
-    test "$1" = "$2" || (echo 1>&2 "$1 != $2"; exit 1)
+    test "$1" = "$2" || fatal "$1 != $2"
 }
 
 assert_str_match () {
     if ! echo "$1" | grep -E -q "$2"; then
-	(echo 1>&2 "$1 does not match regexp $2"; exit 1)
+	      fatal "$1 does not match regexp $2"
     fi
 }
 
 assert_not_streq () {
-    (! test "$1" = "$2") || (echo 1>&2 "$1 == $2"; exit 1)
+    (! test "$1" = "$2") || fatal "$1 == $2"
 }
 
 assert_has_file () {
-    test -f "$1" || (echo 1>&2 "Couldn't find '$1'"; exit 1)
+    test -f "$1" || fatal "Couldn't find '$1'"
 }
 
 assert_has_dir () {
-    test -d "$1" || (echo 1>&2 "Couldn't find '$1'"; exit 1)
+    test -d "$1" || fatal "Couldn't find '$1'"
 }
 
 assert_not_has_file () {
     if test -f "$1"; then
         sed -e 's/^/# /' < "$1" >&2
-        echo 1>&2 "File '$1' exists"
-        exit 1
+        fatal "File '$1' exists"
     fi
 }
 
 assert_not_file_has_content () {
     if grep -q -e "$2" "$1"; then
         sed -e 's/^/# /' < "$1" >&2
-        echo 1>&2 "File '$1' incorrectly matches regexp '$2'"
-        exit 1
+        fatal "File '$1' incorrectly matches regexp '$2'"
     fi
 }
 
 assert_not_has_dir () {
     if test -d "$1"; then
-	echo 1>&2 "Directory '$1' exists"; exit 1
+	      fatal "Directory '$1' exists"
     fi
 }
 
 assert_file_has_content () {
     if ! grep -q -e "$2" "$1"; then
         sed -e 's/^/# /' < "$1" >&2
-        echo 1>&2 "File '$1' doesn't match regexp '$2'"
-        exit 1
+        fatal "File '$1' doesn't match regexp '$2'"
     fi
 }
 
@@ -175,17 +176,15 @@ assert_symlink_has_content () {
 assert_file_empty() {
     if test -s "$1"; then
         sed -e 's/^/# /' < "$1" >&2
-        echo 1>&2 "File '$1' is not empty"
-        exit 1
+        fatal "File '$1' is not empty"
     fi
 }
 
 assert_files_hardlinked() {
     f1=$(stat -c %i $1)
     f2=$(stat -c %i $2)
     if [ "$f1" != "$f2" ]; then
-        echo 1>&2 "Files '$1' and '$2' are not hardlinked"
-        exit 1
+        fatal "Files '$1' and '$2' are not hardlinked"
     fi
 }