Abort when load is invoked with a nonexistent script

libexec/bats-exec-test

@@ -12,7 +12,7 @@ if [ -z "$BATS_TEST_FILENAME" ]; then
   echo "usage: bats-exec <filename>" >&2
   exit 1
 elif [ ! -f "$BATS_TEST_FILENAME" ]; then
-  echo "bats: $BATS_TEST_FILENAME does not exist"
+  echo "bats: $BATS_TEST_FILENAME does not exist" >&2
   exit 1
 else
   shift
@@ -22,6 +22,12 @@ BATS_TEST_DIRNAME="$(dirname "$BATS_TEST_FILENAME")"
 BATS_TEST_NAMES=()
 
 load() {
+  local filename="$BATS_TEST_DIRNAME/$1.bash"
+  [ -f "$filename" ] || {
+    echo "bats: $filename does not exist" >&2
+    exit 1
+  }
+
   source "$BATS_TEST_DIRNAME/$1.bash"
 }
 

test/bats.bats

@@ -75,6 +75,11 @@ fixtures bats
   [ $status -eq 0 ]
 }
 
+@test "load aborts if the specified script does not exist" {
+  HELPER_NAME="nonexistent" run bats "$FIXTURE_ROOT/load.bats"
+  [ $status -eq 1 ]
+}
+
 @test "output is discarded for passing tests and printed for failing tests" {
   run bats "$FIXTURE_ROOT/output.bats"
   [ $status -eq 1 ]

test/fixtures/bats/load.bats

@@ -1,4 +1,5 @@
-load test_helper
+[ -n "$HELPER_NAME" ] || HELPER_NAME="test_helper"
+load "$HELPER_NAME"
 
 @test "calling a loaded helper" {
   help_me