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Add ChunkGenerator

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This generator collects values from the underlying generator until it
has a specified amount of them, and then returns them in one "chunk".
In case the underlying generator does not have enough elements for
a specific chunk, the left-over elements are discarded.

Closes #1538
This commit is contained in:
Martin Hořeňovský
2019-02-23 20:22:46 +01:00
parent 288387fa10
commit 693647c43f
11 changed files with 526 additions and 178 deletions
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13
projects/SelfTest/Baselines/compact.sw.approved.txt
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@@ -417,6 +417,19 @@ Generators.tests.cpp:<line number>: passed: j > 0 for: 3 > 0
Generators.tests.cpp:<line number>: passed: j > 0 for: 1 > 0
Generators.tests.cpp:<line number>: passed: j > 0 for: 2 > 0
Generators.tests.cpp:<line number>: passed: j > 0 for: 3 > 0
Generators.tests.cpp:<line number>: passed: chunk2.size() == 2 for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() == chunk2.back() for: 1 == 1
Generators.tests.cpp:<line number>: passed: chunk2.size() == 2 for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() == chunk2.back() for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.size() == 2 for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() == chunk2.back() for: 3 == 3
Generators.tests.cpp:<line number>: passed: chunk2.size() == 2 for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() == chunk2.back() for: 1 == 1
Generators.tests.cpp:<line number>: passed: chunk2.front() < 3 for: 1 < 3
Generators.tests.cpp:<line number>: passed: chunk2.size() == 2 for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() == chunk2.back() for: 2 == 2
Generators.tests.cpp:<line number>: passed: chunk2.front() < 3 for: 2 < 3
Generators.tests.cpp:<line number>: passed: chunk(2, value(1)), Catch::GeneratorException
Generators.tests.cpp:<line number>: passed: j < i for: -3 < 1
Generators.tests.cpp:<line number>: passed: j < i for: -2 < 1
Generators.tests.cpp:<line number>: passed: j < i for: -1 < 1

2
projects/SelfTest/Baselines/console.std.approved.txt
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@@ -1175,5 +1175,5 @@ due to unexpected exception with message:
===============================================================================
test cases: 245 | 185 passed | 56 failed | 4 failed as expected
assertions: 1365 | 1229 passed | 115 failed | 21 failed as expected
assertions: 1378 | 1242 passed | 115 failed | 21 failed as expected

113
projects/SelfTest/Baselines/console.sw.approved.txt
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@@ -3080,6 +3080,117 @@ Generators.tests.cpp:<line number>: PASSED:
with expansion:
3 > 0
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Number of elements in source is divisible by chunk size
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.size() == 2 )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() == chunk2.back() )
with expansion:
1 == 1
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Number of elements in source is divisible by chunk size
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.size() == 2 )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() == chunk2.back() )
with expansion:
2 == 2
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Number of elements in source is divisible by chunk size
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.size() == 2 )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() == chunk2.back() )
with expansion:
3 == 3
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Number of elements in source is not divisible by chunk size
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.size() == 2 )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() == chunk2.back() )
with expansion:
1 == 1
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() < 3 )
with expansion:
1 < 3
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Number of elements in source is not divisible by chunk size
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.size() == 2 )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() == chunk2.back() )
with expansion:
2 == 2
Generators.tests.cpp:<line number>: PASSED:
REQUIRE( chunk2.front() < 3 )
with expansion:
2 < 3
-------------------------------------------------------------------------------
Generators -- adapters
Chunking a generator into sized pieces
Throws on too small generators
-------------------------------------------------------------------------------
Generators.tests.cpp:<line number>
...............................................................................
Generators.tests.cpp:<line number>: PASSED:
REQUIRE_THROWS_AS( chunk(2, value(1)), Catch::GeneratorException )
-------------------------------------------------------------------------------
Generators -- simple
one
@@ -10574,5 +10685,5 @@ Misc.tests.cpp:<line number>: PASSED:
===============================================================================
test cases: 245 | 172 passed | 69 failed | 4 failed as expected
assertions: 1379 | 1229 passed | 129 failed | 21 failed as expected
assertions: 1392 | 1242 passed | 129 failed | 21 failed as expected

5
projects/SelfTest/Baselines/junit.sw.approved.txt
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@@ -4,7 +4,7 @@
<property name="random-seed" value="1"/>
</properties>
loose text artifact
<testsuite name="<exe-name>" errors="17" failures="113" tests="1380" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
<testsuite name="<exe-name>" errors="17" failures="113" tests="1393" 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="#1027" time="{duration}"/>
@@ -347,6 +347,9 @@ Message.tests.cpp:<line number>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Transforming elements/Same type" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Transforming elements/Different type" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Repeating a generator" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Chunking a generator into sized pieces/Number of elements in source is divisible by chunk size" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Chunking a generator into sized pieces/Number of elements in source is not divisible by chunk size" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- adapters/Chunking a generator into sized pieces/Throws on too small generators" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- simple/one" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators -- simple/two" time="{duration}"/>
<testcase classname="<exe-name>.global" name="Generators internals/Single value" time="{duration}"/>

146
projects/SelfTest/Baselines/xml.sw.approved.txt
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@@ -3538,7 +3538,7 @@
</Section>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Generators -- adapters" tags="[generators]" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<TestCase name="Generators -- adapters" tags="[generators][generic]" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Filtering by predicate" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
@@ -3755,6 +3755,146 @@
</Expression>
<OverallResults successes="1" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Number of elements in source is divisible by chunk size" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.size() == 2
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() == chunk2.back()
</Original>
<Expanded>
1 == 1
</Expanded>
</Expression>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Number of elements in source is divisible by chunk size" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.size() == 2
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() == chunk2.back()
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Number of elements in source is divisible by chunk size" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.size() == 2
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() == chunk2.back()
</Original>
<Expanded>
3 == 3
</Expanded>
</Expression>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="2" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Number of elements in source is not divisible by chunk size" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.size() == 2
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() == chunk2.back()
</Original>
<Expanded>
1 == 1
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() &lt; 3
</Original>
<Expanded>
1 &lt; 3
</Expanded>
</Expression>
<OverallResults successes="3" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="3" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Number of elements in source is not divisible by chunk size" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.size() == 2
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() == chunk2.back()
</Original>
<Expanded>
2 == 2
</Expanded>
</Expression>
<Expression success="true" type="REQUIRE" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk2.front() &lt; 3
</Original>
<Expanded>
2 &lt; 3
</Expanded>
</Expression>
<OverallResults successes="3" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="3" failures="0" expectedFailures="0"/>
</Section>
<Section name="Chunking a generator into sized pieces" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Section name="Throws on too small generators" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Expression success="true" type="REQUIRE_THROWS_AS" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
<Original>
chunk(2, value(1)), Catch::GeneratorException
</Original>
<Expanded>
chunk(2, value(1)), Catch::GeneratorException
</Expanded>
</Expression>
<OverallResults successes="1" failures="0" expectedFailures="0"/>
</Section>
<OverallResults successes="1" failures="0" expectedFailures="0"/>
</Section>
<OverallResult success="true"/>
</TestCase>
<TestCase name="Generators -- simple" tags="[generators]" filename="projects/<exe-name>/UsageTests/Generators.tests.cpp" >
@@ -12785,7 +12925,7 @@ loose text artifact
</Section>
<OverallResult success="true"/>
</TestCase>
<OverallResults successes="1229" failures="130" expectedFailures="21"/>
<OverallResults successes="1242" failures="130" expectedFailures="21"/>
</Group>
<OverallResults successes="1229" failures="129" expectedFailures="21"/>
<OverallResults successes="1242" failures="129" expectedFailures="21"/>
</Catch>

19
projects/SelfTest/UsageTests/Generators.tests.cpp
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@@ -114,7 +114,7 @@ SCENARIO("Eating cucumbers", "[generators][approvals]") {
#endif
// There are also some generic generator manipulators
TEST_CASE("Generators -- adapters", "[generators]") {
TEST_CASE("Generators -- adapters", "[generators][generic]") {
// TODO: This won't work yet, introduce GENERATE_VAR?
//auto numbers = Catch::Generators::values({ 1, 2, 3, 4, 5, 6 });
SECTION("Filtering by predicate") {
@@ -144,6 +144,23 @@ TEST_CASE("Generators -- adapters", "[generators]") {
auto j = GENERATE(repeat(2, values({ 1, 2, 3 })));
REQUIRE(j > 0);
}
SECTION("Chunking a generator into sized pieces") {
SECTION("Number of elements in source is divisible by chunk size") {
auto chunk2 = GENERATE(chunk(2, values({ 1, 1, 2, 2, 3, 3 })));
REQUIRE(chunk2.size() == 2);
REQUIRE(chunk2.front() == chunk2.back());
}
SECTION("Number of elements in source is not divisible by chunk size") {
auto chunk2 = GENERATE(chunk(2, values({ 1, 1, 2, 2, 3 })));
REQUIRE(chunk2.size() == 2);
REQUIRE(chunk2.front() == chunk2.back());
REQUIRE(chunk2.front() < 3);
}
SECTION("Throws on too small generators") {
using namespace Catch::Generators;
REQUIRE_THROWS_AS(chunk(2, value(1)), Catch::GeneratorException);
}
}
}
// Note that because of the non-reproducibility of distributions,