X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=tst%2Fmath%2FGaloisLFSRTest.cpp;fp=tst%2Fmath%2FGaloisLFSRTest.cpp;h=958ac765fe9d0710a69653e3585dd79ec2e907e7;hb=8f6530c75730f901efd6708e4fde7e68a178adf1;hp=0000000000000000000000000000000000000000;hpb=c51b3bbef5c9b8ab52f55d46f08c5992fe574f70;p=blobs.git

diff --git a/tst/math/GaloisLFSRTest.cpp b/tst/math/GaloisLFSRTest.cpp
new file mode 100644
index 0000000..958ac76
--- /dev/null
+++ b/tst/math/GaloisLFSRTest.cpp
@@ -0,0 +1,86 @@
+#include "GaloisLFSRTest.hpp"
+
+#include "math/GaloisLFSR.hpp"
+
+#include <algorithm>
+#include <sstream>
+
+CPPUNIT_TEST_SUITE_REGISTRATION(blobs::math::test::GaloisLFSRTest);
+
+using namespace std;
+
+
+namespace blobs {
+namespace math {
+namespace test {
+
+void GaloisLFSRTest::setUp() {
+
+}
+
+void GaloisLFSRTest::tearDown() {
+
+}
+
+void GaloisLFSRTest::testFloatNorm() {
+	GaloisLFSR random(4);
+	for (int i = 0; i < 64; ++i) {
+		float value = random.SNorm();
+		AssertBetween(
+			"random signed normal float",
+			-1.0f, 1.0f, value);
+	}
+	for (int i = 0; i < 64; ++i) {
+		float value = random.UNorm();
+		AssertBetween(
+			"random unsigned normal float",
+			0.0f, 1.0f, value);
+	}
+}
+
+void GaloisLFSRTest::testFromContainer() {
+	GaloisLFSR random(5);
+	const vector<int> container({ 1, 2, 3, 4, 5 });
+	for (int i = 0; i < 64; ++i) {
+		int element = random.From(container);
+		AssertContains(
+			"random element from container",
+			container, element);
+	}
+}
+
+void GaloisLFSRTest::AssertBetween(
+	string message,
+	float minimum,
+	float maximum,
+	float actual
+) {
+	stringstream msg;
+	msg << message << ": " << actual << " not in ["
+		<< minimum << ',' << maximum << ']';
+	CPPUNIT_ASSERT_MESSAGE(
+		msg.str(),
+		minimum <= actual && actual <= maximum);
+
+}
+
+void GaloisLFSRTest::AssertContains(
+	string message,
+	const vector<int> &container,
+	int element
+) {
+	stringstream msg;
+	msg << message << ": " << element << " not in { ";
+	for (int i : container) {
+		msg << i << ' ';
+	}
+	msg << '}';
+	CPPUNIT_ASSERT_MESSAGE(
+		msg.str(),
+		find(container.begin(), container.end(), element) != container.end());
+
+}
+
+}
+}
+}