1 files changed, 104 insertions, 0 deletions
diff --git a/src/jtutil/test_round.cc b/src/jtutil/test_round.cc
new file mode 100644
index 0000000..075209b
--- /dev/null
+++ b/src/jtutil/test_round.cc
@@ -0,0 +1,104 @@
+// test_round.cc -- test driver for round<fpt> and round<double>
+// $Id$
+
+#include <stdio.h>
+#include <assert.h>
+#include "stdc.h"
+#include "util++.hh"
+
+//
+// Usage:
+//	test_round x
+//
+int main(int argc, const char *const argv[])
+{
+	for (int i = -10 ; i <= +10 ; ++i)
+	{
+	printf("testing %d +/- various things...\n", i);
+
+	float f = float(i);
+	double d = double(i);
+
+
+	//
+	// round<fpt>::to_integer()
+	//
+
+	assert( round<double>::to_integer(d - 0.49) == i );
+	assert( round<double>::to_integer(d - 0.01) == i );
+	assert( round<double>::to_integer(d - 1e-4) == i );
+	assert( round<double>::to_integer(d - 1e-10) == i );
+	assert( round<double>::to_integer(d        ) == i );
+	assert( round<double>::to_integer(d + 1e-10) == i );
+	assert( round<double>::to_integer(d + 1e-4) == i );
+	assert( round<double>::to_integer(d + 0.01) == i );
+	assert( round<double>::to_integer(d + 0.49) == i );
+
+	assert( round<float>::to_integer(f - 0.49) == i );
+	assert( round<float>::to_integer(f - 0.01) == i );
+	assert( round<float>::to_integer(f - 1e-4) == i );
+	assert( round<float>::to_integer(f - 1e-10) == i );
+	assert( round<float>::to_integer(f        ) == i );
+	assert( round<float>::to_integer(f + 1e-10) == i );
+	assert( round<float>::to_integer(f + 1e-4) == i );
+	assert( round<float>::to_integer(f + 0.01) == i );
+	assert( round<float>::to_integer(f + 0.49) == i );
+
+
+	//
+	// round<fpt>::floor()
+	//
+
+	assert( round<double>::floor(d - 0.49) == i-1 );
+	assert( round<double>::floor(d - 0.01) == i-1);
+	assert( round<double>::floor(d - 1e-4) == i-1 );
+	assert( round<double>::floor(d - 1e-10) == i-1 );
+	assert( round<double>::floor(d        ) == i );
+	assert( round<double>::floor(d + 1e-10) == i );
+	assert( round<double>::floor(d + 1e-4) == i );
+	assert( round<double>::floor(d + 0.01) == i );
+	assert( round<double>::floor(d + 0.49) == i );
+
+	assert( round<float>::floor(f - 0.49) == i-1 );
+	assert( round<float>::floor(f - 0.01) == i-1 );
+	assert( round<float>::floor(f - 1e-4) == i-1 );
+	assert( round<float>::floor(f - 1e-10) == ((i == 0) ? i-1 : i) );
+					// i != 0 ==> not enough precision
+					//            to see as noninteger
+	assert( round<float>::floor(f        ) == i );
+	assert( round<float>::floor(f + 1e-10) == i );
+	assert( round<float>::floor(f + 1e-4) == i );
+	assert( round<float>::floor(f + 0.01) == i );
+	assert( round<float>::floor(f + 0.49) == i );
+
+
+	//
+	// round<fpt>::ceiling()
+	//
+
+	assert( round<double>::ceiling(d - 0.49) == i );
+	assert( round<double>::ceiling(d - 0.01) == i);
+	assert( round<double>::ceiling(d - 1e-4) == i );
+	assert( round<double>::ceiling(d - 1e-10) == i );
+	assert( round<double>::ceiling(d        ) == i );
+	assert( round<double>::ceiling(d + 1e-10) == i+1 );
+	assert( round<double>::ceiling(d + 1e-4) == i+1 );
+	assert( round<double>::ceiling(d + 0.01) == i+1 );
+	assert( round<double>::ceiling(d + 0.49) == i+1 );
+
+	assert( round<float>::ceiling(f - 0.49) == i );
+	assert( round<float>::ceiling(f - 0.01) == i);
+	assert( round<float>::ceiling(f - 1e-4) == i );
+	assert( round<float>::ceiling(f - 1e-10) == i );
+	assert( round<float>::ceiling(f        ) == i );
+	assert( round<float>::ceiling(f + 1e-10) == ((i == 0) ? i+1 : i) );
+					// i != 0 ==> not enough precision
+					//            to see as noninteger
+	assert( round<float>::ceiling(f + 1e-4) == i+1 );
+	assert( round<float>::ceiling(f + 0.01) == i+1 );
+	assert( round<float>::ceiling(f + 0.49) == i+1 );
+	}
+
+printf("everything looks ok!\n");
+return 0;
+}