btrfs-progs: tests: enhance TEST_LOG features

Add new keyword to dump the log file after any test fails. Can be useful
for remote analysis of test failures.

Signed-off-by: David Sterba <dsterba@suse.com>

Makefile.in

@@ -25,6 +25,11 @@
 #   EXTRA_CFLAGS   additional compiler flags
 #   EXTRA_LDFLAGS  additional linker flags
 #
+# Testing-specific options (see also tests/README.md):
+#   TEST=GLOB      run test(s) from directories matching GLOB
+#   TEST_LOG=tty   print name of a command run via the execution helpers
+#   TEST_LOG=dump  dump testing log file when a test fails
+#
 # Static checkers:
 #   CHECKER        static checker binary to be called (default: sparse)
 #   CHECKER_FLAGS  flags to pass to CHECKER, can override CFLAGS

tests/README.md

@@ -108,9 +108,13 @@ the root helper).
 
 ### Verbosity
 
-Setting the variable `TEST_LOG=tty` will print all commands executed by some of
+* `TEST_LOG=tty` -- setting the variable will print all commands executed by
-the wrappers (`run_check` etc), other commands are not printed to the terminal
+  some of the wrappers (`run_check` etc), other commands are not printed to the
-(but the full output is in the log).
+  terminal (but the full output is in the log)
+
+* `TEST_LOG=dump` -- dump the entire testing log when a test fails
+
+Multiple values can be separated by `,`.
 
 ### Permissions
 

tests/cli-tests.sh

@@ -34,6 +34,9 @@ do
 		echo "    [TEST/cli]   $name"
 		./test.sh
 		if [ $? -ne 0 ]; then
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 			_fail "test failed for case $(basename $i)"
 		fi
 	fi

tests/convert-tests.sh

@@ -37,6 +37,9 @@ run_one_test() {
 		./test.sh
 		if [ $? -ne 0 ]; then
 			_fail "test failed for case $testname"
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 		fi
 	else
 		_fail "custom test script not found"

tests/fsck-tests.sh

@@ -36,6 +36,9 @@ run_one_test() {
 		# Type 2
 		./test.sh
 		if [ $? -ne 0 ]; then
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 			_fail "test failed for case $(basename $testname)"
 		fi
 	else

tests/fuzz-tests.sh

@@ -33,6 +33,9 @@ do
 		echo "    [TEST/fuzz]   $name"
 		./test.sh
 		if [ $? -ne 0 ]; then
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 			_fail "test failed for case $(basename $i)"
 		fi
 	fi

tests/misc-tests.sh

@@ -37,6 +37,9 @@ do
 	if [ -x test.sh ]; then
 		./test.sh
 		if [ $? -ne 0 ]; then
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 			_fail "test failed for case $(basename $i)"
 		fi
 	fi

tests/mkfs-tests.sh

@@ -34,6 +34,9 @@ do
 	if [ -x test.sh ]; then
 		./test.sh
 		if [ $? -ne 0 ]; then
+			if [[ $TEST_LOG =~ dump ]]; then
+				cat "$RESULTS"
+			fi
 			_fail "test failed for case $(basename $i)"
 		fi
 	fi