[libgpiod][PATCH v3 10/14] bindings: cxx: tests: add tests for SET_CONFIG methods

[Kent Gibson <warthog618@xxxxxxxxx>]

Extend test coverage over set_config, set_flags, set_direction_input, and
set_direction_output methods.

Signed-off-by: Kent Gibson <warthog618@xxxxxxxxx>
---
 bindings/cxx/tests/tests-line.cpp | 128 ++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)

diff --git a/bindings/cxx/tests/tests-line.cpp b/bindings/cxx/tests/tests-line.cpp
index 9a0b488..5353093 100644
--- a/bindings/cxx/tests/tests-line.cpp
+++ b/bindings/cxx/tests/tests-line.cpp
@@ -324,6 +324,134 @@ TEST_CASE("Line values can be set and read", "[line]")
 	}
 }
 
+TEST_CASE("Line can be reconfigured", "[line]")
+{
+	mockup::probe_guard mockup_chips({ 8 });
+	::gpiod::chip chip(mockup::instance().chip_name(0));
+	::gpiod::line_request config;
+
+	config.consumer = consumer.c_str();
+
+	SECTION("set config (single line, active-state)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_INPUT;
+		config.flags = 0;
+		line.request(config);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_INPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+
+		line.set_config(::gpiod::line_request::DIRECTION_OUTPUT,
+			::gpiod::line_request::FLAG_ACTIVE_LOW,1);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_LOW);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 0);
+		line.set_value(0);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 1);
+
+		line.set_config(::gpiod::line_request::DIRECTION_OUTPUT, 0);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 0);
+		line.set_value(1);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 1);
+	}
+
+	SECTION("set flags (single line, active-state)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = 0;
+		line.request(config,1);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 1);
+
+		line.set_flags(::gpiod::line_request::FLAG_ACTIVE_LOW);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_LOW);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 0);
+
+		line.set_flags(0);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 1);
+	}
+
+	SECTION("set flags (single line, drive)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = 0;
+		line.request(config);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+
+		line.set_flags(::gpiod::line_request::FLAG_OPEN_DRAIN);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+
+		line.set_flags(::gpiod::line_request::FLAG_OPEN_SOURCE);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE(line.is_open_source());
+
+		line.set_flags(0);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+	}
+
+	SECTION("set flags (single line, bias)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = 0;
+		line.request(config);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+
+		line.set_flags(::gpiod::line_request::FLAG_OPEN_DRAIN);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+
+		line.set_flags(::gpiod::line_request::FLAG_OPEN_SOURCE);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE(line.is_open_source());
+
+		line.set_flags(0);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+	}
+
+	SECTION("set direction input (single line)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = 0;
+		line.request(config);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		line.set_direction_input();
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_INPUT);
+	}
+
+	SECTION("set direction output (single line)")
+	{
+		auto line = chip.get_line(3);
+		config.request_type = ::gpiod::line_request::DIRECTION_INPUT;
+		config.flags = 0;
+		line.request(config);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_INPUT);
+		line.set_direction_output(1);
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(mockup::instance().chip_get_value(0, 3) == 1);
+	}
+}
+
 TEST_CASE("Exported line can be released", "[line]")
 {
 	mockup::probe_guard mockup_chips({ 8 });
-- 
2.24.0