From de862f9f1bb72bd624cf4f341d03584a4123a6cb Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Sat, 26 Oct 2013 13:36:25 +0200
Subject: [PATCH] test/test_mixramp: unit test for mixramp_interpolate()

---
 .gitignore            |  2 ++
 Makefile.am           | 10 ++++++
 test/test_mixramp.cxx | 82 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 test/test_mixramp.cxx

diff --git a/.gitignore b/.gitignore
index a20d3c54b..a520f12d0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,7 +68,9 @@ test/run_tcp_connect
 test/test_pcm
 test/dump_rva2
 test/dump_text_file
+test/test_util
 test/test_byte_reverse
+test/test_mixramp
 test/test_vorbis_encoder
 test/DumpDatabase
 
diff --git a/Makefile.am b/Makefile.am
index dea7bdb56..48a143f39 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1058,6 +1058,7 @@ if ENABLE_TEST
 C_TESTS = \
 	test/test_util \
 	test/test_byte_reverse \
+	test/test_mixramp \
 	test/test_pcm \
 	test/test_queue_priority
 
@@ -1483,6 +1484,15 @@ test_test_byte_reverse_LDADD = \
 	libutil.a \
 	$(CPPUNIT_LIBS)
 
+test_test_mixramp_SOURCES = \
+	src/Log.cxx \
+	test/test_mixramp.cxx
+test_test_mixramp_CPPFLAGS = $(AM_CPPFLAGS) $(CPPUNIT_CFLAGS) -DCPPUNIT_HAVE_RTTI=0
+test_test_mixramp_CXXFLAGS = $(AM_CXXFLAGS) -Wno-error=deprecated-declarations
+test_test_mixramp_LDADD = \
+	$(GLIB_LIBS) \
+	$(CPPUNIT_LIBS)
+
 test_test_pcm_SOURCES = \
 	test/test_pcm_util.hxx \
 	test/test_pcm_dither.cxx \
diff --git a/test/test_mixramp.cxx b/test/test_mixramp.cxx
new file mode 100644
index 000000000..83d266d48
--- /dev/null
+++ b/test/test_mixramp.cxx
@@ -0,0 +1,82 @@
+/*
+ * Unit tests for mixramp_interpolate()
+ */
+
+#include "config.h"
+#include "CrossFade.cxx"
+
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/TestFactoryRegistry.h>
+#include <cppunit/ui/text/TestRunner.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+#include <string.h>
+
+class MixRampTest : public CppUnit::TestFixture {
+	CPPUNIT_TEST_SUITE(MixRampTest);
+	CPPUNIT_TEST(TestInterpolate);
+	CPPUNIT_TEST_SUITE_END();
+
+public:
+	void TestInterpolate() {
+		const char *input = "1.0 0.00;3.0 0.10;6.0 2.50;";
+
+		char *foo = strdup(input);
+		CPPUNIT_ASSERT(!std::isnan(mixramp_interpolate(foo, 0)));
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_EQUAL(float(0),
+				     mixramp_interpolate(foo, 1));
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_EQUAL(float(0.1),
+				     mixramp_interpolate(foo, 3));
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_EQUAL(float(2.5),
+				     mixramp_interpolate(foo, 6));
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT(!std::isnan(mixramp_interpolate(foo, 3)));
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_DOUBLES_EQUAL(float(0.05),
+					     mixramp_interpolate(foo, 2),
+					     0.05);
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_DOUBLES_EQUAL(float(1.3),
+					     mixramp_interpolate(foo, 4.5),
+					     0.05);
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_DOUBLES_EQUAL(float(0.9),
+					     mixramp_interpolate(foo, 4),
+					     0.05);
+		free(foo);
+
+		foo = strdup(input);
+		CPPUNIT_ASSERT_DOUBLES_EQUAL(float(1.7),
+					     mixramp_interpolate(foo, 5),
+					     0.05);
+		free(foo);
+	}
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(MixRampTest);
+
+int
+main(gcc_unused int argc, gcc_unused char **argv)
+{
+	CppUnit::TextUi::TestRunner runner;
+	auto &registry = CppUnit::TestFactoryRegistry::getRegistry();
+	runner.addTest(registry.makeTest());
+	return runner.run() ? EXIT_SUCCESS : EXIT_FAILURE;
+}