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Approx cleanup: More tests, INFINITY handling, etc

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This commit is contained in:
Martin Hořeňovský 2017-11-01 07:30:11 +01:00
parent 00af677577
commit 22ac9d2184
8 changed files with 207 additions and 45 deletions
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24
include/internal/catch_approx.cpp
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@ -8,18 +8,22 @@
#include "catch_approx.h"
#include <cmath>
#include <limits>
namespace {
// Performs equivalent check of std::fabs(lhs - rhs) <= margin
// But without the subtraction to allow for INFINITY in comparison
bool marginComparison(double lhs, double rhs, double margin) {
return (lhs + margin >= rhs) && (rhs + margin >= lhs);
}
}
namespace Catch {
namespace Detail {
double dmax(double lhs, double rhs) {
if (lhs < rhs) {
return rhs;
}
return lhs;
}
Approx::Approx ( double value )
: m_epsilon( std::numeric_limits<float>::epsilon()*100 ),
m_margin( 0.0 ),
@ -37,6 +41,12 @@ namespace Detail {
return oss.str();
}
bool Approx::equalityComparisonImpl(const double other) const {
// First try with fixed margin, then compute margin based on epsilon, scale and Approx's value
// Thanks to Richard Harris for his help refining the scaled margin value
return marginComparison(m_value, other, m_margin) || marginComparison(m_value, other, m_epsilon * (m_scale + std::fabs(m_value)));
}
} // end namespace Detail
std::string StringMaker<Catch::Detail::Approx>::convert(Catch::Detail::Approx const& value) {

33
include/internal/catch_approx.h
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@ -11,16 +11,15 @@
#include "catch_enforce.h"
#include "catch_tostring.h"
#include <cmath>
#include <type_traits>
namespace Catch {
namespace Detail {
double dmax(double lhs, double rhs);
class Approx {
private:
bool equalityComparisonImpl(double other) const;
public:
explicit Approx ( double value );
@ -42,15 +41,8 @@ namespace Detail {
template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
friend bool operator == ( const T& lhs, Approx const& rhs ) {
// Thanks to Richard Harris for his help refining this formula
auto lhs_v = static_cast<double>(lhs);
bool relativeOK = std::fabs( lhs_v - rhs.m_value ) < rhs.m_epsilon * (rhs.m_scale + std::fabs(rhs.m_value) );
if (relativeOK) {
return true;
}
return std::fabs(lhs_v - rhs.m_value) <= rhs.m_margin;
return rhs.equalityComparisonImpl(lhs_v);
}
template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
@ -90,18 +82,21 @@ namespace Detail {
template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
Approx& epsilon( T const& newEpsilon ) {
double asDouble = static_cast<double>(newEpsilon);
CATCH_ENFORCE(asDouble >= 0 && asDouble <= 1.0,
"Invalid Approx::epsilon: " << m_epsilon <<
", Approx::epsilon has to be between 0 and 1");
m_epsilon = asDouble;
double epsilonAsDouble = static_cast<double>(newEpsilon);
CATCH_ENFORCE(epsilonAsDouble >= 0 && epsilonAsDouble <= 1.0,
"Invalid Approx::epsilon: " << epsilonAsDouble
<< ", Approx::epsilon has to be between 0 and 1");
m_epsilon = epsilonAsDouble;
return *this;
}
template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
Approx& margin( T const& newMargin ) {
m_margin = static_cast<double>(newMargin);
CATCH_ENFORCE(m_margin >= 0, "Invalid Approx::margin: " << m_margin << ", Approx::Margin has to be non-negative.");
double marginAsDouble = static_cast<double>(newMargin);
CATCH_ENFORCE(marginAsDouble >= 0,
"Invalid Approx::margin: " << marginAsDouble
<< ", Approx::Margin has to be non-negative.");
m_margin = marginAsDouble;
return *this;
}

29
projects/SelfTest/ApproxTests.cpp
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@ -8,6 +8,8 @@
#include "catch.hpp"
#include <cmath>
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
@ -25,7 +27,7 @@ TEST_CASE
REQUIRE( Approx( d ) != 1.22 );
REQUIRE( Approx( d ) != 1.24 );
REQUIRE( 0 == Approx(0) );
REQUIRE(INFINITY == Approx(INFINITY));
}
///////////////////////////////////////////////////////////////////////////////
@ -106,7 +108,7 @@ TEST_CASE
REQUIRE( 1.0f == Approx( 1 ) );
REQUIRE( 0 == Approx( dZero) );
REQUIRE( 0 == Approx( dSmall ).epsilon( 0.001 ) );
REQUIRE( 0 == Approx( dSmall ).margin( 0.001 ) );
REQUIRE( 1.234f == Approx( dMedium ) );
REQUIRE( dMedium == Approx( 1.234f ) );
}
@ -120,7 +122,7 @@ TEST_CASE
{
double d = 1.23;
Approx approx = Approx::custom().epsilon( 0.005 );
Approx approx = Approx::custom().epsilon( 0.01 );
REQUIRE( d == approx( 1.23 ) );
REQUIRE( d == approx( 1.22 ) );
@ -169,9 +171,26 @@ TEST_CASE("Approx setters validate their arguments", "[Approx]") {
REQUIRE_NOTHROW(Approx(0).margin(1234656));
REQUIRE_THROWS_AS(Approx(0).margin(-2), std::domain_error);
REQUIRE_NOTHROW(Approx(0).epsilon(0));
REQUIRE_NOTHROW(Approx(0).epsilon(1));
REQUIRE_THROWS_AS(Approx(0).epsilon(-0.001), std::domain_error);
REQUIRE_THROWS_AS(Approx(0).epsilon(1.0001), std::domain_error);
}
////////////////////////////////////////////////////////////////////////////////
TEST_CASE("Default scale is invisible to comparison", "[Approx]") {
REQUIRE(101.000001 != Approx(100).epsilon(0.01));
REQUIRE(std::pow(10, -5) != Approx(std::pow(10, -7)));
}
TEST_CASE("Epsilon only applies to Approx's value", "[Approx]") {
REQUIRE(101.01 != Approx(100).epsilon(0.01));
}
TEST_CASE("Assorted miscellaneous tests", "[Approx]") {
REQUIRE(INFINITY == Approx(INFINITY));
}
class StrongDoubleTypedef
{
@ -207,5 +226,3 @@ TEST_CASE( "Comparison with explicitly convertible types", "[Approx]" )
REQUIRE(Approx(11.0) >= td);
}
////////////////////////////////////////////////////////////////////////////////

4
projects/SelfTest/Baselines/console.std.approved.txt
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@ -1003,6 +1003,6 @@ with expansion:
"{?}" == "1"
===============================================================================
test cases: 182 | 131 passed | 47 failed | 4 failed as expected
assertions: 896 | 779 passed | 96 failed | 21 failed as expected
test cases: 185 | 134 passed | 47 failed | 4 failed as expected
assertions: 904 | 787 passed | 96 failed | 21 failed as expected

68
projects/SelfTest/Baselines/console.sw.approved.txt
View File

@ -576,6 +576,22 @@ ApproxTests.cpp:<line number>:
PASSED:
REQUIRE_THROWS_AS( Approx(0).margin(-2), std::domain_error )
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE_NOTHROW( Approx(0).epsilon(0) )
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE_NOTHROW( Approx(0).epsilon(1) )
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE_THROWS_AS( Approx(0).epsilon(-0.001), std::domain_error )
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE_THROWS_AS( Approx(0).epsilon(1.0001), std::domain_error )
-------------------------------------------------------------------------------
Approx with exactly-representable margin
-------------------------------------------------------------------------------
@ -704,7 +720,7 @@ with expansion:
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( 0 == Approx( dSmall ).epsilon( 0.001 ) )
REQUIRE( 0 == Approx( dSmall ).margin( 0.001 ) )
with expansion:
0 == Approx( 0.00001 )
@ -798,6 +814,18 @@ PASSED:
with expansion:
true
-------------------------------------------------------------------------------
Assorted miscellaneous tests
-------------------------------------------------------------------------------
ApproxTests.cpp:<line number>
...............................................................................
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( INFINITY == Approx(INFINITY) )
with expansion:
inff == Approx( inf )
-------------------------------------------------------------------------------
Bitfields can be captured (#1027)
-------------------------------------------------------------------------------
@ -1293,6 +1321,24 @@ ExceptionTests.cpp:<line number>: FAILED:
due to unexpected exception with message:
custom std exception
-------------------------------------------------------------------------------
Default scale is invisible to comparison
-------------------------------------------------------------------------------
ApproxTests.cpp:<line number>
...............................................................................
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( 101.000001 != Approx(100).epsilon(0.01) )
with expansion:
101.000001 != Approx( 100.0 )
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( std::pow(10, -5) != Approx(std::pow(10, -7)) )
with expansion:
0.00001 != Approx( 0.0000001 )
-------------------------------------------------------------------------------
EndsWith string matcher
-------------------------------------------------------------------------------
@ -1304,6 +1350,18 @@ MatchersTests.cpp:<line number>: FAILED:
with expansion:
"this string contains 'abc' as a substring" ends with: "this"
-------------------------------------------------------------------------------
Epsilon only applies to Approx's value
-------------------------------------------------------------------------------
ApproxTests.cpp:<line number>
...............................................................................
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( 101.01 != Approx(100).epsilon(0.01) )
with expansion:
101.01 != Approx( 100.0 )
-------------------------------------------------------------------------------
Equality checks that should fail
-------------------------------------------------------------------------------
@ -4263,9 +4321,9 @@ with expansion:
ApproxTests.cpp:<line number>:
PASSED:
REQUIRE( 0 == Approx(0) )
REQUIRE( INFINITY == Approx(INFINITY) )
with expansion:
0 == Approx( 0.0 )
inff == Approx( inf )
Message from section one
-------------------------------------------------------------------------------
@ -7574,6 +7632,6 @@ MiscTests.cpp:<line number>:
PASSED:
===============================================================================
test cases: 182 | 129 passed | 49 failed | 4 failed as expected
assertions: 895 | 775 passed | 99 failed | 21 failed as expected
test cases: 185 | 132 passed | 49 failed | 4 failed as expected
assertions: 903 | 783 passed | 99 failed | 21 failed as expected

5
projects/SelfTest/Baselines/junit.sw.approved.txt
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@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<testsuitesloose text artifact
>
<testsuite name="<exe-name>" errors="15" failures="85" tests="896" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
<testsuite name="<exe-name>" errors="15" failures="85" tests="904" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
<testcase classname="<exe-name>.global" name="# A test name that starts with a #" time="{duration}"/>
<testcase classname="<exe-name>.global" name="#1005: Comparing pointer to int and long (NULL can be either on various systems)" time="{duration}"/>
<testcase classname="<exe-name>.global" name="#748 - captures with unexpected exceptions/outside assertions" time="{duration}">
@ -111,6 +111,7 @@ ExceptionTests.cpp:<line number>
<testcase classname="<exe-name>.global" name="Assertions then sections/A section" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Assertions then sections/A section/Another section" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Assertions then sections/A section/Another other section" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Assorted miscellaneous tests" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Bitfields can be captured (#1027)" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Capture and info messages/Capture should stringify like assertions" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Capture and info messages/Info should NOT stringify the way assertions do" time="{duration}"/>
@ -146,11 +147,13 @@ custom std exception
ExceptionTests.cpp:<line number>
</error>
</testcase>
<testcase classname="<exe-name>.global" name="Default scale is invisible to comparison" time="{duration}"/>
<testcase classname="<exe-name>.global" name="EndsWith string matcher" time="{duration}">
<failure message="&quot;this string contains 'abc' as a substring&quot; ends with: &quot;this&quot;" type="CHECK_THAT">
MatchersTests.cpp:<line number>
</failure>
</testcase>
<testcase classname="<exe-name>.global" name="Epsilon only applies to Approx's value" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Equality checks that should fail" time="{duration}">
<failure message="7 == 6" type="CHECK">
ConditionTests.cpp:<line number>

83
projects/SelfTest/Baselines/xml.sw.approved.txt
View File

@ -601,6 +601,38 @@
Approx(0).margin(-2), std::domain_error
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE_NOTHROW" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
Approx(0).epsilon(0)
</Original>
<Expanded>
Approx(0).epsilon(0)
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE_NOTHROW" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
Approx(0).epsilon(1)
</Original>
<Expanded>
Approx(0).epsilon(1)
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE_THROWS_AS" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
Approx(0).epsilon(-0.001), std::domain_error
</Original>
<Expanded>
Approx(0).epsilon(-0.001), std::domain_error
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE_THROWS_AS" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
Approx(0).epsilon(1.0001), std::domain_error
</Original>
<Expanded>
Approx(0).epsilon(1.0001), std::domain_error
</Expanded>
</Expression>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Approx with exactly-representable margin" tags="[Approx]" filename="projects/<exe-name>/ApproxTests.cpp" >
@ -741,7 +773,7 @@
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
0 == Approx( dSmall ).epsilon( 0.001 )
0 == Approx( dSmall ).margin( 0.001 )
</Original>
<Expanded>
0 == Approx( 0.00001 )
@ -828,6 +860,17 @@
</Section>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Assorted miscellaneous tests" tags="[Approx]" filename="projects/<exe-name>/ApproxTests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
INFINITY == Approx(INFINITY)
</Original>
<Expanded>
inff == Approx( inf )
</Expanded>
</Expression>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Bitfields can be captured (#1027)" filename="projects/<exe-name>/TrickyTests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/TrickyTests.cpp" >
<Original>
@ -1433,6 +1476,25 @@
</Exception>
<OverallResult success="false"/>
</TestCase>
<TestCase name="Default scale is invisible to comparison" tags="[Approx]" filename="projects/<exe-name>/ApproxTests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
101.000001 != Approx(100).epsilon(0.01)
</Original>
<Expanded>
101.000001 != Approx( 100.0 )
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
std::pow(10, -5) != Approx(std::pow(10, -7))
</Original>
<Expanded>
0.00001 != Approx( 0.0000001 )
</Expanded>
</Expression>
<OverallResult success="true"/>
</TestCase>
<TestCase name="EndsWith string matcher" tags="[.][failing][matchers]" filename="projects/<exe-name>/MatchersTests.cpp" >
<Expression success="false" type="CHECK_THAT" filename="projects/<exe-name>/MatchersTests.cpp" >
<Original>
@ -1444,6 +1506,17 @@
</Expression>
<OverallResult success="false"/>
</TestCase>
<TestCase name="Epsilon only applies to Approx's value" tags="[Approx]" filename="projects/<exe-name>/ApproxTests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
101.01 != Approx(100).epsilon(0.01)
</Original>
<Expanded>
101.01 != Approx( 100.0 )
</Expanded>
</Expression>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Equality checks that should fail" tags="[!mayfail][.][failing]" filename="projects/<exe-name>/ConditionTests.cpp" >
<Expression success="false" type="CHECK" filename="projects/<exe-name>/ConditionTests.cpp" >
<Original>
@ -4875,10 +4948,10 @@ A string sent directly to stderr
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/ApproxTests.cpp" >
<Original>
0 == Approx(0)
INFINITY == Approx(INFINITY)
</Original>
<Expanded>
0 == Approx( 0.0 )
inff == Approx( inf )
</Expanded>
</Expression>
<OverallResult success="true"/>
@ -8373,7 +8446,7 @@ loose text artifact
</Section>
<OverallResult success="true"/>
</TestCase>
<OverallResults successes="775" failures="100" expectedFailures="21"/>
<OverallResults successes="783" failures="100" expectedFailures="21"/>
</Group>
<OverallResults successes="775" failures="99" expectedFailures="21"/>
<OverallResults successes="783" failures="99" expectedFailures="21"/>
</Catch>

6
scripts/approvalTests.py
View File

@ -45,6 +45,11 @@ errnoParser = re.compile(r'''
\(\*_errno\(\)\)
''', re.VERBOSE)
sinceEpochParser = re.compile(r'\d+ .+ since epoch')
infParser = re.compile(r'''
\(\(float\)\(1e\+300\ \*\ 1e\+300\)\) # MSVC INFINITY macro
|
\(__builtin_inff\(\)\) # Clang INFINITY macro
''', re.VERBOSE)
if len(sys.argv) == 2:
cmdPath = sys.argv[1]
@ -102,6 +107,7 @@ def filterLine(line):
line = specialCaseParser.sub('file:\g<1>', line)
line = errnoParser.sub('errno', line)
line = sinceEpochParser.sub('{since-epoch-report}', line)
line = infParser.sub('INFINITY', line)
return line