From 79c64f085b3e503c0193b56bd820ec22886adf7d Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 8 Jul 2021 19:50:44 +0100
Subject: [PATCH] jstest: run1: make expected output optional

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 jstest/lower.nodejs |  3 ---
 jstest/run1         | 23 +++++++++++++++--------
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/jstest/lower.nodejs b/jstest/lower.nodejs
index e3aae5eb..2f5c9750 100644
--- a/jstest/lower.nodejs
+++ b/jstest/lower.nodejs
@@ -1,7 +1,4 @@
 // -*- JavaScript -*-
-//
-// @@expect
-// @@end
 
 const fs = require('fs');
 let wasm_bindgen = require('otter_wasm.js');
diff --git a/jstest/run1 b/jstest/run1
index b8463b5b..3676e967 100755
--- a/jstest/run1
+++ b/jstest/run1
@@ -18,13 +18,17 @@ ln -s ../../target/jstest/otter_wasm{.js,_bg.wasm} .
 export NODE_PATH=.
 ln -sf "$@" .
 
-sed -n <$1 '
-	/^\/\/ @@expect/,/^\/\/ @@end/ {
-		s/^\/\/ //;
-		/^@@/d;
-		p;
-	}
-' >expect
+if grep '^\/\/ @expect' $1; then
+	sed -n <$1 '
+		/^\/\/ @@expect/,/^\/\/ @@end/ {
+			s/^\/\/ //;
+			/^@@/d;
+			p;
+		}
+	' >expect
+else
+	rm -f expect
+fi
 
 exec 3>run.js
 sed >&3 <script.js '/^\/\/@@notest/,/^\/\/@@/d'
@@ -40,5 +44,8 @@ if [ $rc != 0 ]; then
 	egrep '' /dev/null output ||:
 fi
 
-diff -u expect output
+if test -f expect; then
+	diff -u expect output
+fi
+
 exit $rc
-- 
2.30.2