[libgpiod][PATCH v3 04/14] bindings: cxx: tests: add tests for bias flags

[Kent Gibson <warthog618@xxxxxxxxx>]

Extend test coverage over the bias flags in requests and the bias setting
returned by line.bias().

Signed-off-by: Kent Gibson <warthog618@xxxxxxxxx>
---
 bindings/cxx/tests/tests-line.cpp | 87 +++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/bindings/cxx/tests/tests-line.cpp b/bindings/cxx/tests/tests-line.cpp
index fedaa05..9a0b488 100644
--- a/bindings/cxx/tests/tests-line.cpp
+++ b/bindings/cxx/tests/tests-line.cpp
@@ -52,6 +52,9 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.consumer().empty());
 		REQUIRE_FALSE(line.is_requested());
 		REQUIRE_FALSE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
 	}
 
 	SECTION("exported line")
@@ -68,6 +71,9 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
 		REQUIRE(line.is_requested());
 		REQUIRE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
 	}
 
 	SECTION("exported line with flags")
@@ -88,6 +94,87 @@ TEST_CASE("Line information can be correctly retrieved", "[line]")
 		REQUIRE(line.is_used());
 		REQUIRE(line.is_open_drain());
 		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+	}
+
+	SECTION("exported open source line")
+	{
+		::gpiod::line_request config;
+
+		config.consumer = consumer.c_str();
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = ::gpiod::line_request::FLAG_OPEN_SOURCE;
+		line.request(config);
+
+		REQUIRE(line.offset() == 4);
+		REQUIRE(line.name() == "gpio-mockup-A-4");
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(line.is_requested());
+		REQUIRE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_AS_IS);
+	}
+
+	SECTION("exported bias disable line")
+	{
+		::gpiod::line_request config;
+
+		config.consumer = consumer.c_str();
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = ::gpiod::line_request::FLAG_BIAS_DISABLE;
+		line.request(config);
+
+		REQUIRE(line.offset() == 4);
+		REQUIRE(line.name() == "gpio-mockup-A-4");
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(line.is_requested());
+		REQUIRE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_DISABLE);
+	}
+
+	SECTION("exported pull-down line")
+	{
+		::gpiod::line_request config;
+
+		config.consumer = consumer.c_str();
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = ::gpiod::line_request::FLAG_BIAS_PULL_DOWN;
+		line.request(config);
+
+		REQUIRE(line.offset() == 4);
+		REQUIRE(line.name() == "gpio-mockup-A-4");
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(line.is_requested());
+		REQUIRE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_PULL_DOWN);
+	}
+
+	SECTION("exported pull-up line")
+	{
+		::gpiod::line_request config;
+
+		config.consumer = consumer.c_str();
+		config.request_type = ::gpiod::line_request::DIRECTION_OUTPUT;
+		config.flags = ::gpiod::line_request::FLAG_BIAS_PULL_UP;
+		line.request(config);
+
+		REQUIRE(line.offset() == 4);
+		REQUIRE(line.name() == "gpio-mockup-A-4");
+		REQUIRE(line.direction() == ::gpiod::line::DIRECTION_OUTPUT);
+		REQUIRE(line.active_state() == ::gpiod::line::ACTIVE_HIGH);
+		REQUIRE(line.is_requested());
+		REQUIRE(line.is_used());
+		REQUIRE_FALSE(line.is_open_drain());
+		REQUIRE_FALSE(line.is_open_source());
+		REQUIRE(line.bias() == ::gpiod::line::BIAS_PULL_UP);
 	}
 
 	SECTION("update line info")
-- 
2.24.0