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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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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>