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Diffstat (limited to 'tests/libntp/lfptostr.cpp')
-rw-r--r-- | tests/libntp/lfptostr.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/tests/libntp/lfptostr.cpp b/tests/libntp/lfptostr.cpp new file mode 100644 index 0000000..aa5f511 --- /dev/null +++ b/tests/libntp/lfptostr.cpp @@ -0,0 +1,103 @@ +/* + * This file contains test for both mfptoa and mfptoms (which uses dolfptoa), + * since all these functions are very similar. It also tests ulfptoa, which is + * a macro. + */ + +#include "libntptest.h" + +extern "C" { +#include "ntp_fp.h" +}; + +class lfptostrTest : public libntptest { +protected: + static const int LFP_MAX_PRECISION = 10; + static const int LFP_MAX_PRECISION_MS = 7; + + static const int ONE_FOURTH = 1073741824; // (1 << 30) + static const int HALF = (1 << 31); + static const int THREE_FOURTH = -ONE_FOURTH; + static const int HALF_PROMILLE_UP = 2147484; // slightly more than 0.0005 + static const int HALF_PROMILLE_DOWN = 2147483; // slightly less than 0.0005 +}; + +TEST_F(lfptostrTest, PositiveInteger) { + l_fp test = {200, 0}; // exact 200.0000000000 + + EXPECT_STREQ("200.0000000000", mfptoa(test.l_ui, test.l_uf, LFP_MAX_PRECISION)); + EXPECT_STREQ("200000.0000000", mfptoms(test.l_ui, test.l_uf, LFP_MAX_PRECISION_MS)); +} + +TEST_F(lfptostrTest, NegativeInteger) { + l_fp test = {-100, 0}; // -100 + + EXPECT_STREQ("-100.0000000000", lfptoa(&test, LFP_MAX_PRECISION)); + EXPECT_STREQ("-100000.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); +} + +TEST_F(lfptostrTest, PositiveIntegerWithFraction) { + l_fp test = {200, ONE_FOURTH}; // 200.25 + + EXPECT_STREQ("200.2500000000", lfptoa(&test, LFP_MAX_PRECISION)); + EXPECT_STREQ("200250.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); +} + +TEST_F(lfptostrTest, NegativeIntegerWithFraction) { + l_fp test = {-100, ONE_FOURTH}; // -99.75 + + EXPECT_STREQ("-99.7500000000", lfptoa(&test, LFP_MAX_PRECISION)); + EXPECT_STREQ("-99750.0000000", lfptoms(&test, LFP_MAX_PRECISION_MS)); +} + +TEST_F(lfptostrTest, RoundingDownToInteger) { + l_fp test = {10, ONE_FOURTH}; // 10.25 + + EXPECT_STREQ("10", lfptoa(&test, 0)); + EXPECT_STREQ("10250", lfptoms(&test, 0)); +} + +TEST_F(lfptostrTest, RoundingMiddleToInteger) { + l_fp test = {10, HALF}; // 10.5 + + EXPECT_STREQ("11", lfptoa(&test, 0)); + EXPECT_STREQ("10500", lfptoms(&test, 0)); +} + +TEST_F(lfptostrTest, RoundingUpToInteger) { + l_fp test = {5, THREE_FOURTH}; // 5.75 + + EXPECT_STREQ("6", lfptoa(&test, 0)); + EXPECT_STREQ("5750", lfptoms(&test, 0)); +} + +TEST_F(lfptostrTest, SingleDecimal) { + l_fp test = {8, ONE_FOURTH}; // 8.25 + + EXPECT_STREQ("8.3", lfptoa(&test, 1)); + EXPECT_STREQ("8250.0", lfptoms(&test, 1)); +} + +TEST_F(lfptostrTest, MillisecondsRoundingUp) { + l_fp test = {1, HALF_PROMILLE_UP}; //slightly more than 1.0005 + + EXPECT_STREQ("1.0", lfptoa(&test, 1)); + + EXPECT_STREQ("1000.5", lfptoms(&test, 1)); + EXPECT_STREQ("1001", lfptoms(&test, 0)); +} + +TEST_F(lfptostrTest, MillisecondsRoundingDown) { + l_fp test = {1, HALF_PROMILLE_DOWN}; // slightly less than 1.0005 + + EXPECT_STREQ("1.0", lfptoa(&test, 1)); + + EXPECT_STREQ("1000.5", lfptoms(&test, 1)); + EXPECT_STREQ("1000", lfptoms(&test, 0)); +} + +TEST_F(lfptostrTest, UnsignedInteger) { + l_fp test = {3000000000UL, 0}; + + EXPECT_STREQ("3000000000.0", ulfptoa(&test, 1)); +} |