[libcamera-devel] [PATCH 2/3] test: Add Sequence observer tests

[Kieran Bingham]

Validate the Sequence object for a set of possible permutations.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 test/meson.build  |  1 +
 test/sequence.cpp | 80 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 test/sequence.cpp

diff --git a/test/meson.build b/test/meson.build
index fd4c5ca07c15..7c53fe5d0d76 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -47,6 +47,7 @@ internal_tests = [
     ['object-delete',                   'object-delete.cpp'],
     ['object-invoke',                   'object-invoke.cpp'],
     ['pixel-format',                    'pixel-format.cpp'],
+    ['sequence',                        'sequence.cpp'],
     ['shared-fd',                       'shared-fd.cpp'],
     ['signal-threads',                  'signal-threads.cpp'],
     ['threads',                         'threads.cpp'],
diff --git a/test/sequence.cpp b/test/sequence.cpp
new file mode 100644
index 000000000000..4afb9998527a
--- /dev/null
+++ b/test/sequence.cpp
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2022, Ideas on Board Oy.
+ *
+ * sequence.cpp - Sequence observer tests
+ */
+
+#include <iostream>
+
+#include <libcamera/sequence.h>
+
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+
+class SequenceTest : public Test
+{
+private:
+	int Fail(std::string m)
+	{
+		cout << m << endl;
+		return TestFail;
+	}
+
+protected:
+	int run()
+	{
+		Sequence seq;
+		int diff;
+
+		/* Validate non-zero initialization */
+		diff = seq.update(10);
+		if (diff)
+			return Fail("Initialisation test failed");
+
+		diff = seq.update(11);
+		if (diff)
+			return Fail("Sequential sequence failure");
+
+		/* Validate 1 drop */
+		diff = seq.update(13);
+		if (diff != 1)
+			return Fail("Sequence gap not detected");
+
+		/* Validate 10 drops - currently expect sequence 14 */
+		diff = seq.update(24);
+		if (diff != 10)
+			return Fail("Large sequence gap not detected");
+
+		/* Validate reset */
+		seq.reset();
+		diff = seq.update(50);
+		if (diff)
+			return Fail("Reset failed");
+
+		/* Validate reverse sequence detected */
+		diff = seq.update(49);
+		if (diff == 0)
+			return Fail("Reverse sequence detection error");
+
+		/* Validate integer wrap around (Shouldn't ever happen but...) */
+		seq.reset();
+		diff = seq.update(-2);
+		if (diff)
+			return Fail("Integer wrap test reset failed");
+
+		diff = seq.update(-1);
+		if (diff)
+			return Fail("Negative sequence failed");
+
+		diff = seq.update(0);
+		if (diff)
+			return Fail("Integer wrap test failed");
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(SequenceTest)
-- 
2.25.1