Reduce indentation test runner noise and add colour output

dev/do/test-indent

@@ -2,13 +2,26 @@
 
 # Run Clojure.vim indentation tests.
 
-# TODO: colour messages?
+# TODO: option to enable/disable (Lua / Vim9script) versions.
+
+C_GREEN='\033[1;32m'
+C_RED='\033[1;31m'
+C_YELLOW='\033[1;33m'
+C_BLUE='\033[1;34m'
+C_RESET='\033[0m'
+
+log()    { printf "$*$C_RESET\n"; }
+logc()   { log "$1$2"; }
+succ()   { logc "$C_GREEN" "$*"; }
+warn()   { logc "$C_YELLOW" "$*"; }
+err()    { logc "$C_RED" "$*"; }
+info()   { logc "$C_BLUE" "$*"; }
+abort()  { err "ABORT: $*"; exit 1; }
 
 pushd "$(dirname "$0")/.."
 
 if [ "$EDITOR" != 'vim' ] && [ "$EDITOR" != 'nvim' ]; then
-    echo 'ERROR: Set the "EDITOR" environment variable to "vim" or "nvim" and run again.'
-    exit 1
+    abort 'Set the "EDITOR" environment variable to "vim" or "nvim" and run again.'
 fi
 
 extra_opts=()
@@ -23,24 +36,22 @@ mkdir -p "$tmp_base_dir"
 tmp_dir="$(mktemp --directory "$tmp_base_dir/XXXXXX")"
 test_case_dir='tests'
 
-test_pass() { PASSED+=("$1"); echo '::endgroup::'; }
+test_pass() { PASSED+=("$1"); }
 test_fail() {
     FAILED+=("$1")
-    echo '::endgroup::'
-    echo "::error file=dev/$test_case_dir/$1/out.clj::Failed indent test case."
+    err "::error file=dev/$test_case_dir/$1/out.clj::Failed indent test case."
 }
 test_skip() {
     SKIPPED+=("$1")
-    echo '::endgroup::'
-    echo "::warning file=dev/$test_case_dir/$1/out.clj::Skipped indent test case."
+    warn "::warning file=dev/$test_case_dir/$1/out.clj::Skipped indent test case."
 }
 
 run_test_case() {
     test_case="$1"
     in_file="$test_case_dir/$test_case/in.clj"
     expected_file="$test_case_dir/$test_case/out.clj"
 
-    echo "::group::$EDITOR: $test_case"
+    info "> $EDITOR: $test_case"
 
     if [ -f "$test_case_dir/$test_case/SKIP" ]; then
         test_skip "$test_case"
@@ -56,7 +67,8 @@ run_test_case() {
             test_cmd=('+normal! gg=G')
         fi
 
-        "$EDITOR" "${extra_opts[@]}" --clean -EsNXnu test-vimrc.vim "${test_cmd[@]}" '+xall!' -- "$actual_file"
+        "$EDITOR" "${extra_opts[@]}" --clean -EsNXnu test-vimrc.vim \
+            "${test_cmd[@]}" '+xall!' -- "$actual_file"
 
         diff --color=always -u "$expected_file" "$actual_file"
 
@@ -68,9 +80,10 @@ for tcase in $test_case_dir/*/; do
     run_test_case "$(basename "$tcase")"
 done
 
-echo "passed: ${#PASSED[@]}, failed: ${#FAILED[@]}, skipped: ${#SKIPPED[@]}"
+printf "passed: $C_GREEN%s$C_RESET, failed: $C_RED%s$C_RESET, skipped: $C_YELLOW%s$C_RESET\n" \
+    "${#PASSED[@]}" "${#FAILED[@]}" "${#SKIPPED[@]}"
 
 # If none passed, or some failed, exit with error.
 if [ ${#PASSED[@]} -eq 0 ] || [ ${#FAILED[@]} -gt 0 ]; then
-    exit 1
+    abort 'Failed test cases.'
 fi