Check for Vader prior to running teststopic/chk-vader

Without this the test script confusingly claims "All tests are passing."
when Vader is missing.

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/runtests.sh b/tests/runtests.sh
index ceccba3..1436653 100755
--- a/tests/runtests.sh
+++ b/tests/runtests.sh
@@ -3,6 +3,23 @@
 REPO_TOP=$(git rev-parse --show-toplevel)
 cd "${REPO_TOP}"
 
+echo "Check for Vader"
+echo "---------------"
+vim -Nu <(cat <<EOF
+function! s:chk_vader_exists()
+    if exists(":Vader")
+        cquit 0
+    else
+        echom 'Vader not found. Please install it.'
+        echom 'https://github.com/junegunn/vader.vim'
+        cquit 1
+    endif
+endfunction
+
+command! ChkVaderExists call s:chk_vader_exists()
+EOF
+) '+ChkVaderExists' || exit 1
+
 echo "Basic environment"
 echo "-----------------"
 vim -Nu <(cat <<EOF