[libgpiod] [PATCH 5/5] bindings: cxx: Workaround --success run

[Alexander Stein <alexander.stein@mailbox.org>]

If run with --success, all expressions are evaluated and printed out.
But REQUIRE_FALSE(chip) tries to iterate over the chip resulting in this
backtrace:
#0  gpiod_chip_num_lines (chip=chip@entry=0x0) at ../../lib/core.c:235
#1  gpiod_line_iter_new (chip=0x0) at ../../lib/iter.c:140
#2  gpiod::(anonymous namespace)::make_line_iter (chip=0x0) at ../../../bindings/cxx/iter.cpp:29
#3  gpiod::line_iter::line_iter (this=0x7fffffffd690, owner=...) at ../../../bindings/cxx/iter.cpp:109
#4  Catch::rangeToString<gpiod::chip> (range=...) at /usr/include/catch2/catch.hpp:1959
[...]

Workaround by forcing catch2 to call gpiod::chip::operator bool().

Signed-off-by: Alexander Stein <alexander.stein@mailbox.org>
---
This actually looks like a flaw in the binding itself that the
gpiod::line_iter can't cope with an empty gpiod::chip.

 bindings/cxx/tests/tests-chip.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/bindings/cxx/tests/tests-chip.cpp b/bindings/cxx/tests/tests-chip.cpp
index c9eb8e5..1c69872 100644
--- a/bindings/cxx/tests/tests-chip.cpp
+++ b/bindings/cxx/tests/tests-chip.cpp
@@ -70,7 +70,7 @@ TEST_CASE("GPIO chip can be opened with the open() method in different modes", "
 	mockup::probe_guard mockup_chips({ 8, 8, 8 });
 	::gpiod::chip chip;
 
-	REQUIRE_FALSE(chip);
+	REQUIRE_FALSE(!!chip);
 
 	SECTION("open by name")
 	{
@@ -102,7 +102,7 @@ TEST_CASE("Uninitialized GPIO chip behaves correctly", "[chip]")
 
 	SECTION("uninitialized chip is 'false'")
 	{
-		REQUIRE_FALSE(chip);
+		REQUIRE_FALSE(!!chip);
 	}
 
 	SECTION("using uninitialized chip throws logic_error")
@@ -149,7 +149,7 @@ TEST_CASE("Chip object can be reset", "[chip]")
 	::gpiod::chip chip(mockup::instance().chip_name(0));
 	REQUIRE(chip);
 	chip.reset();
-	REQUIRE_FALSE(chip);
+	REQUIRE_FALSE(!!chip);
 }
 
 TEST_CASE("Chip info can be correctly retrieved", "[chip]")
-- 
2.22.0