added tests for gzip

tests/gzip/Makefile

@@ -0,0 +1,42 @@
+# ################################################################
+# Copyright (c) 2017-present, Yann Collet, Facebook, Inc.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+# ################################################################
+
+PRGDIR = ../../programs
+VOID   = /dev/null
+
+
+.PHONY: all
+all: test-gzip-env test-helin-segv test-hufts test-keep test-list test-memcpy-abuse test-mixed test-null-suffix-clobber test-stdin test-trailing-nul test-unpack-invalid test-zdiff test-zgrep-context test-zgrep-f test-zgrep-signal test-znew-k test-z-suffix 
+	@echo Testing completed
+
+.PHONY: zstd
+zstd:
+	$(MAKE) -C $(PRGDIR) zstd
+	#alias gzip='$(PRGDIR)/zstd --format=gzip'
+	#ln -sf /drive_d/GitHub/zstd/programs/zstd /usr/local/bin/gzip
+	gzip --version
+
+.PHONY: clean
+clean:
+	@$(MAKE) -C $(PRGDIR) $@ > $(VOID)
+	@$(RM) *.trs *.log
+	@echo Cleaning completed
+
+
+#------------------------------------------------------------------------------
+# validated only for Linux, OSX, Hurd and some BSD targets
+#------------------------------------------------------------------------------
+ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU FreeBSD DragonFly NetBSD))
+#.PHONY: test-gzip-env test-helin-segv test-hufts test-keep test-list test-memcpy-abuse test-mixed test-null-suffix-clobber test-stdin test-trailing-nul test-unpack-invalid test-zdiff test-zgrep-context test-zgrep-f test-zgrep-signal test-znew-k test-z-suffix 
+
+test-%: zstd
+	@./test-driver.sh --test-name $* --log-file $*.log --trs-file $*.trs --expect-failure "no" --color-tests "yes" --enable-hard-errors "yes" ./$* || echo error
+#|| exit 1
+
+endif