From dacbcc7d7779e5faec243b51b1581d401954ddea Mon Sep 17 00:00:00 2001
From: Stefan Klug <stefan.klug@ideasonboard.com>
Date: Thu, 3 Apr 2025 17:49:11 +0200
Subject: test: Add minimal test for Matrix

Add a few tests for the Matrix class. This is not full fledged but at
least a starter.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
---
 test/matrix.cpp  | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 test/meson.build |  1 +
 2 files changed, 54 insertions(+)
 create mode 100644 test/matrix.cpp

(limited to 'test')

diff --git a/test/matrix.cpp b/test/matrix.cpp
new file mode 100644
index 00000000..4afae2da
--- /dev/null
+++ b/test/matrix.cpp
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2024, Ideas on Board Oy
+ *
+ * Matrix tests
+ */
+
+#include "libcamera/internal/matrix.h"
+
+#include <cmath>
+#include <iostream>
+
+#include "test.h"
+
+using namespace libcamera;
+
+#define ASSERT_EQ(a, b)                                                   \
+	if ((a) != (b)) {                                                 \
+		std::cout << #a " != " #b << " (line " << __LINE__ << ")" \
+			  << std::endl;                                   \
+		return TestFail;                                          \
+	}
+
+class MatrixTest : public Test
+{
+protected:
+	int run()
+	{
+		Matrix<double, 3, 3> m1;
+
+		ASSERT_EQ(m1[0][0], 0.0);
+		ASSERT_EQ(m1[0][1], 0.0);
+
+		constexpr Matrix<float, 2, 2> m2 = Matrix<float, 2, 2>().identity();
+		ASSERT_EQ(m2[0][0], 1.0);
+		ASSERT_EQ(m2[0][1], 0.0);
+		ASSERT_EQ(m2[1][0], 0.0);
+		ASSERT_EQ(m2[1][1], 1.0);
+
+		Matrix<float, 2, 2> m3{ { 2.0, 0.0, 0.0, 2.0 } };
+		Matrix<float, 2, 2> m4 = m3.inverse();
+
+		Matrix<float, 2, 2> m5 = m3 * m4;
+		ASSERT_EQ(m5[0][0], 1.0);
+		ASSERT_EQ(m5[0][1], 0.0);
+		ASSERT_EQ(m5[1][0], 0.0);
+		ASSERT_EQ(m5[1][1], 1.0);
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(MatrixTest)
diff --git a/test/meson.build b/test/meson.build
index 40956649..52f04364 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -60,6 +60,7 @@ internal_tests = [
     {'name': 'file', 'sources': ['file.cpp']},
     {'name': 'flags', 'sources': ['flags.cpp']},
     {'name': 'hotplug-cameras', 'sources': ['hotplug-cameras.cpp']},
+    {'name': 'matrix', 'sources': ['matrix.cpp']},
     {'name': 'message', 'sources': ['message.cpp']},
     {'name': 'object', 'sources': ['object.cpp']},
     {'name': 'object-delete', 'sources': ['object-delete.cpp']},
-- 
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