From d1aaa9264089fa64a98eecef09aa4a5d9773e345 Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Sun, 5 Nov 2023 20:09:09 +0100
Subject: make test improvements

---
 Makefile     | 2 +-
 README.md    | 9 ++++++++-
 test/test.sh | 5 +++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 09967ea..4afb030 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ clean:
 	rm -rf *.o
 
 test: debugcube.o
-	CUBETYPE=${CUBETYPE} ./test/test.sh
+	CUBETYPE=${CUBETYPE} TEST=${TEST} ./test/test.sh
 
 benchmark: cube.o
 	CUBETYPE=${CUBETYPE} ./benchmark/bench.sh
diff --git a/README.md b/README.md
index d829af4..383b50c 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,14 @@ Then
 $ make test
 ```
 
-to run the tests. You can also run
+to run the tests. You can also run only the tests that match a chosen
+regex, for example:
+
+```
+$ TEST=coord make test
+```
+
+You can also run
 
 ```
 $ make benchmark
diff --git a/test/test.sh b/test/test.sh
index 1ee972d..a018401 100755
--- a/test/test.sh
+++ b/test/test.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+re="${TEST:-$@}"
+
 CC="cc -DDEBUG -std=c99 -pthread -pedantic -Wall -Wextra \
     -Wno-unused-parameter -Wno-unused-function -g3 -D$CUBETYPE"
 if [ "$CUBETYPE" = "CUBE_AVX2" ]; then
@@ -15,6 +17,9 @@ TESTERR="test/last.err"
 CUBEOBJ="debugcube.o"
 
 for t in test/*; do
+	if [ -n "$re" ] && [ -z "$(echo "$t" | grep "$re")" ]; then
+		continue
+	fi
 	if [ ! -d $t ]; then continue; fi
 	$CC -o $TESTBIN $t/*.c $CUBEOBJ || exit 1;
 	for cin in $t/*.in; do
-- 
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