1 files changed, 73 insertions, 0 deletions
diff --git a/contrib/ntp/tests/libntp/sfptostr.c b/contrib/ntp/tests/libntp/sfptostr.c
new file mode 100644
index 0000000..fd56114
--- /dev/null
+++ b/contrib/ntp/tests/libntp/sfptostr.c
@@ -0,0 +1,73 @@
+/* 
+ * This file contains test for both fptoa and fptoms (which uses dofptoa),
+ * since all these functions are very similar.
+ */
+#include "config.h"
+#include "ntp_fp.h"
+#include "unity.h"
+ 
+#define SFP_MAX_PRECISION 6
+
+void test_PositiveInteger(void)
+{
+	s_fp test = 300 << 16; // exact 300.000000
+
+	TEST_ASSERT_EQUAL_STRING("300.000000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("300000.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_NegativeInteger(void)
+{
+	s_fp test = -200 << 16; // exact -200.000000
+
+	TEST_ASSERT_EQUAL_STRING("-200.000000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("-200000.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_PositiveIntegerPositiveFraction(void)
+{
+	s_fp test = (300 << 16) + (1 << 15); // 300 + 0.5
+
+	TEST_ASSERT_EQUAL_STRING("300.500000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("300500.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_NegativeIntegerNegativeFraction(void)
+{
+	s_fp test = (-200 << 16) - (1 << 15); // -200 - 0.5
+
+	TEST_ASSERT_EQUAL_STRING("-200.500000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("-200500.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_PositiveIntegerNegativeFraction(void)
+{
+	s_fp test = (300 << 16) - (1 << 14); // 300 - 0.25
+
+	TEST_ASSERT_EQUAL_STRING("299.750000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("299750.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_NegativeIntegerPositiveFraction(void)
+{
+	s_fp test = (-200 << 16) + (1 << 14)*3; // -200 + 0.75
+
+	TEST_ASSERT_EQUAL_STRING("-199.250000", fptoa(test, SFP_MAX_PRECISION));
+	TEST_ASSERT_EQUAL_STRING("-199250.000", fptoms(test, SFP_MAX_PRECISION));
+}
+
+void test_SingleDecimalInteger(void)
+{
+	s_fp test = 300 << 16; // 300
+
+	TEST_ASSERT_EQUAL_STRING("300.0", fptoa(test, 1));
+	TEST_ASSERT_EQUAL_STRING("300000.0", fptoms(test, 1));
+}
+
+void test_SingleDecimalRounding(void)
+{
+	s_fp test = (2 << 16) + (1 << 14)*3; // 2 + 0.25*3 = 2.75
+
+	TEST_ASSERT_EQUAL_STRING("2.8", fptoa(test, 1));
+	TEST_ASSERT_EQUAL_STRING("2750.0", fptoms(test, 1));
+}