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Refactor custom precision in floating point stringification

Also fixup tests.
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horenmar committed May 2, 2019
1 parent 53a83e8 commit 1161011dd0c8b08ef26aabf99f1e28ab9604108a
@@ -234,32 +234,16 @@ std::string StringMaker<std::nullptr_t>::convert(std::nullptr_t) {
return "nullptr";
}

int StringMaker<float>::m_precision = 5;
int StringMaker<float>::precision = 5;

std::string StringMaker<float>::convert(float value) {
return fpToString(value, m_precision) + 'f';
return fpToString(value, precision) + 'f';
}

void StringMaker<float>::setPrecision(int precision) {
m_precision = precision;
}

int StringMaker<float>::getPrecision() {
return m_precision;
}

int StringMaker<double>::m_precision = 10;
int StringMaker<double>::precision = 10;

std::string StringMaker<double>::convert(double value) {
return fpToString(value, m_precision);
}

void StringMaker<double>::setPrecision(int precision) {
m_precision = precision;
}

int StringMaker<double>::getPrecision() {
return m_precision;
return fpToString(value, precision);
}

std::string ratio_string<std::atto>::symbol() { return "a"; }
@@ -261,19 +261,13 @@ namespace Catch {
template<>
struct StringMaker<float> {
static std::string convert(float value);
static void setPrecision(int precision);
static int getPrecision();
private:
static int m_precision;
static int precision;
};

template<>
struct StringMaker<double> {
static std::string convert(double value);
static void setPrecision(int precision);
static int getPrecision();
private:
static int m_precision;
static int precision;
};

template <typename T>
@@ -859,6 +859,10 @@ Condition.tests.cpp:<line number>: passed: cpc != 0 for: 0x<hex digits> != 0
Condition.tests.cpp:<line number>: passed: returnsNull() == 0 for: {null string} == 0
Condition.tests.cpp:<line number>: passed: returnsConstNull() == 0 for: {null string} == 0
Condition.tests.cpp:<line number>: passed: 0 != p for: 0 != 0x<hex digits>
ToStringGeneral.tests.cpp:<line number>: passed: str1.size() == 3 + 5 for: 8 == 8
ToStringGeneral.tests.cpp:<line number>: passed: str2.size() == 3 + 10 for: 13 == 13
ToStringGeneral.tests.cpp:<line number>: passed: str1.size() == 2 + 5 for: 7 == 7
ToStringGeneral.tests.cpp:<line number>: passed: str2.size() == 2 + 15 for: 17 == 17
Matchers.tests.cpp:<line number>: passed: "foo", Predicate<const char*>([] (const char* const&) { return true; }) for: "foo" matches undescribed predicate
CmdLine.tests.cpp:<line number>: passed: result for: {?}
CmdLine.tests.cpp:<line number>: passed: config.processName == "" for: "" == ""
@@ -1299,6 +1299,6 @@ due to unexpected exception with message:
Why would you throw a std::string?

===============================================================================
test cases: 266 | 199 passed | 63 failed | 4 failed as expected
assertions: 1449 | 1304 passed | 124 failed | 21 failed as expected
test cases: 267 | 200 passed | 63 failed | 4 failed as expected
assertions: 1453 | 1308 passed | 124 failed | 21 failed as expected

@@ -6192,6 +6192,40 @@ Condition.tests.cpp:<line number>: PASSED:
with expansion:
0 != 0x<hex digits>

-------------------------------------------------------------------------------
Precision of floating point stringification can be set
Floats
-------------------------------------------------------------------------------
ToStringGeneral.tests.cpp:<line number>
...............................................................................

ToStringGeneral.tests.cpp:<line number>: PASSED:
CHECK( str1.size() == 3 + 5 )
with expansion:
8 == 8

ToStringGeneral.tests.cpp:<line number>: PASSED:
REQUIRE( str2.size() == 3 + 10 )
with expansion:
13 == 13

-------------------------------------------------------------------------------
Precision of floating point stringification can be set
Double
-------------------------------------------------------------------------------
ToStringGeneral.tests.cpp:<line number>
...............................................................................

ToStringGeneral.tests.cpp:<line number>: PASSED:
CHECK( str1.size() == 2 + 5 )
with expansion:
7 == 7

ToStringGeneral.tests.cpp:<line number>: PASSED:
REQUIRE( str2.size() == 2 + 15 )
with expansion:
17 == 17

-------------------------------------------------------------------------------
Predicate matcher can accept const char*
-------------------------------------------------------------------------------
@@ -11389,6 +11423,6 @@ Misc.tests.cpp:<line number>
Misc.tests.cpp:<line number>: PASSED:

===============================================================================
test cases: 266 | 183 passed | 79 failed | 4 failed as expected
assertions: 1466 | 1304 passed | 141 failed | 21 failed as expected
test cases: 267 | 184 passed | 79 failed | 4 failed as expected
assertions: 1470 | 1308 passed | 141 failed | 21 failed as expected

@@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<testsuitesloose text artifact
>
<testsuite name="<exe-name>" errors="17" failures="125" tests="1467" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
<testsuite name="<exe-name>" errors="17" failures="125" tests="1471" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
<properties>
<property name="filters" value="~[!nonportable]~[!benchmark]~[approvals]"/>
<property name="random-seed" value="1"/>
@@ -574,6 +574,8 @@ Message.tests.cpp:<line number>
<testcase classname="<exe-name>.global" name="Parse test names and tags/empty quoted name" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Parse test names and tags/quoted string followed by tag exclusion" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Pointers can be compared to null" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Precision of floating point stringification can be set/Floats" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Precision of floating point stringification can be set/Double" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Predicate matcher can accept const char*" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Process can be configured on command line/empty args don't cause a crash" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Process can be configured on command line/default - no arguments" time="{duration}"/>
@@ -7778,6 +7778,47 @@ Nor would this
</Expression>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Precision of floating point stringification can be set" tags="[floatingPoint][toString]" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Section name="Floats" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Expression success="true" type="CHECK" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Original>
str1.size() == 3 + 5
</Original>
<Expanded>
8 == 8
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Original>
str2.size() == 3 + 10
</Original>
<Expanded>
13 == 13
</Expanded>
</Expression>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<Section name="Double" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Expression success="true" type="CHECK" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Original>
str1.size() == 2 + 5
</Original>
<Expanded>
7 == 7
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/ToStringGeneral.tests.cpp" >
<Original>
str2.size() == 2 + 15
</Original>
<Expanded>
17 == 17
</Expanded>
</Expression>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Predicate matcher can accept const char*" tags="[compilation][matchers]" filename="projects/<exe-name>/UsageTests/Matchers.tests.cpp" >
<Expression success="true" type="REQUIRE_THAT" filename="projects/<exe-name>/UsageTests/Matchers.tests.cpp" >
<Original>
</Section>
<OverallResult success="true"/>
</TestCase>
<OverallResults successes="1304" failures="142" expectedFailures="21"/>
<OverallResults successes="1308" failures="142" expectedFailures="21"/>
</Group>
<OverallResults successes="1304" failures="141" expectedFailures="21"/>
<OverallResults successes="1308" failures="141" expectedFailures="21"/>
</Catch>
@@ -128,28 +128,39 @@ TEST_CASE("String views are stringified like other strings", "[toString][approva

#endif

//TEMPLATE_TEST_CASE("Floating-point precision can be set", "[toString][floatingPoint]", float, double)
//{
// const auto oldPrecision = Catch::StringMaker<TestType>::getPrecision();
// const auto precision = GENERATE(-1, 0, 3, std::numeric_limits<TestType>::max_digits10);
// const auto expectedLength = unsigned(precision < 0 ? 3 : precision);
//
// CAPTURE( precision );
//
// if (precision >= 0)
// {
// Catch::StringMaker<TestType>::setPrecision(precision);
// }
//
// // Expected to fail to demonstrate the problem
// const auto str = Catch::StringMaker<TestType>::convert(std::numeric_limits<TestType>::epsilon());
// CHECK(str.length() >= expectedLength);
//
// if (precision >= 0)
// {
// Catch::StringMaker<TestType>::setPrecision(oldPrecision);
// }
//}
TEST_CASE("Precision of floating point stringification can be set", "[toString][floatingPoint]") {
SECTION("Floats") {
using sm = Catch::StringMaker<float>;
const auto oldPrecision = sm::precision;

const float testFloat = 1.12345678901234567899f;
auto str1 = sm::convert(testFloat);
sm::precision = 5;
// "1." prefix = 2 chars, f suffix is another char
CHECK(str1.size() == 3 + 5);

sm::precision = 10;
auto str2 = sm::convert(testFloat);
REQUIRE(str2.size() == 3 + 10);
sm::precision = oldPrecision;
}
SECTION("Double") {
using sm = Catch::StringMaker<double>;
const auto oldPrecision = sm::precision;

const double testDouble = 1.123456789012345678901234567899;
sm::precision = 5;
auto str1 = sm::convert(testDouble);
// "1." prefix = 2 chars
CHECK(str1.size() == 2 + 5);

sm::precision = 15;
auto str2 = sm::convert(testDouble);
REQUIRE(str2.size() == 2 + 15);

sm::precision = oldPrecision;
}
}

namespace {

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