Allow enabling multiple warnings in one invocation

docs/command-line.md

@@ -217,6 +217,8 @@ flag for C++ compilers. It turns some suspicious occurences, like a section
 without assertions, into errors. Because these might be intended, warnings
 are not enabled by default, but user can opt in.
 
+You can enable multiple warnings at the same time.
+
 There are currently two warnings implemented:
 
 ```

docs/release-notes.md

@@ -174,6 +174,7 @@ new design.
 * You can have multiple tests with the same name, as long as other parts of the test identity differ (#1915, #1999, #2175)
   * Test identity includes test's name, test's tags and and test's class name if applicable.
 * Added new warning, `UnmatchedTestSpec`, to error on test specs with no matching tests
+* The `-w`, `--warn` warning flags can now be provided multiple times to enable multiple warnings
 
 
 ### Fixes

src/catch2/internal/catch_commandline.cpp

@@ -25,10 +25,10 @@ namespace Catch {
 
         auto const setWarning = [&]( std::string const& warning ) {
             if ( warning == "NoAssertions" ) {
-                config.warnings = WarnAbout::NoAssertions;
+                config.warnings = static_cast<WarnAbout::What>(config.warnings | WarnAbout::NoAssertions);
                 return ParserResult::ok( ParseResultType::Matched );
             } else if ( warning == "UnmatchedTestSpec" ) {
-                config.warnings = WarnAbout::UnmatchedTestSpec;
+                config.warnings = static_cast<WarnAbout::What>(config.warnings | WarnAbout::UnmatchedTestSpec);
                 return ParserResult::ok( ParseResultType::Matched );
             }
 
@@ -217,7 +217,7 @@ namespace Catch {
             | Opt( [&]( int x ){ config.abortAfter = x; }, "no. failures" )
                 ["-x"]["--abortx"]
                 ( "abort after x failures" )
-            | Opt( setWarning, "warning name" )
+            | Opt( accept_many, setWarning, "warning name" )
                 ["-w"]["--warn"]
                 ( "enable warnings" )
             | Opt( [&]( bool flag ) { config.showDurations = flag ? ShowDurations::Always : ShowDurations::Never; }, "yes|no" )

tests/CMakeLists.txt

@@ -237,6 +237,13 @@ set_tests_properties(Warnings::UnmatchedTestSpecIsAccepted
     FAIL_REGULAR_EXPRESSION "Unrecognised warning option: "
 )
 
+add_test(NAME Warnings::MultipleWarningsCanBeSpecified
+  COMMAND
+    $<TARGET_FILE:SelfTest> Tracker
+      --warn NoAssertions
+      --warn UnmatchedTestSpec
+)
+
 add_test(NAME TestSpecs::WarnUnmatchedTestSpecFailsWithUnmatchedTestSpec
   COMMAND
     $<TARGET_FILE:SelfTest> Tracker, "___nonexistent_test___" --warn UnmatchedTestSpec

tests/SelfTest/Baselines/automake.sw.approved.txt

@@ -179,6 +179,7 @@ Nor would this
 :test-result: PASS Overloaded comma or address-of operators are not used
 :test-result: PASS Parse test names and tags
 :test-result: PASS Parsing sharding-related cli flags
+:test-result: PASS Parsing warnings
 :test-result: PASS Pointers can be compared to null
 :test-result: PASS Precision of floating point stringification can be set
 :test-result: PASS Predicate matcher can accept const char*

tests/SelfTest/Baselines/compact.sw.approved.txt

@@ -1200,6 +1200,11 @@ CmdLine.tests.cpp:<line number>: passed: !(result) for: !{?}
 CmdLine.tests.cpp:<line number>: passed: result.errorMessage(), ContainsSubstring("Shard index must be a non-negative number") for: "Shard index must be a non-negative number" contains: "Shard index must be a non-negative number"
 CmdLine.tests.cpp:<line number>: passed: cli.parse({ "test", "--shard-index=0" }) for: {?}
 CmdLine.tests.cpp:<line number>: passed: config.shardIndex == 0 for: 0 == 0
+CmdLine.tests.cpp:<line number>: passed: cli.parse( { "test", "-w", "NoAssertions" } ) for: {?}
+CmdLine.tests.cpp:<line number>: passed: config.warnings == WarnAbout::NoAssertions for: 1 == 1
+CmdLine.tests.cpp:<line number>: passed: !(cli.parse( { "test", "-w", "NoTests" } )) for: !{?}
+CmdLine.tests.cpp:<line number>: passed: cli.parse( { "test", "--warn", "NoAssertions", "--warn", "UnmatchedTestSpec" } ) for: {?}
+CmdLine.tests.cpp:<line number>: passed: config.warnings == ( WarnAbout::NoAssertions | WarnAbout::UnmatchedTestSpec ) for: 3 == 3
 Condition.tests.cpp:<line number>: passed: p == 0 for: 0 == 0
 Condition.tests.cpp:<line number>: passed: p == pNULL for: 0 == 0
 Condition.tests.cpp:<line number>: passed: p != 0 for: 0x<hex digits> != 0

tests/SelfTest/Baselines/console.std.approved.txt

@@ -1426,6 +1426,6 @@ due to unexpected exception with message:
   Why would you throw a std::string?
 
 ===============================================================================
-test cases:  376 |  299 passed |  70 failed |  7 failed as expected
+test cases:  377 |  300 passed |  70 failed |  7 failed as expected
-assertions: 2149 | 1993 passed | 129 failed | 27 failed as expected
+assertions: 2154 | 1998 passed | 129 failed | 27 failed as expected
 

tests/SelfTest/Baselines/console.sw.approved.txt

@@ -8784,6 +8784,52 @@ CmdLine.tests.cpp:<line number>: PASSED:
 with expansion:
   0 == 0
 
+-------------------------------------------------------------------------------
+Parsing warnings
+  NoAssertions
+-------------------------------------------------------------------------------
+CmdLine.tests.cpp:<line number>
+...............................................................................
+
+CmdLine.tests.cpp:<line number>: PASSED:
+  REQUIRE( cli.parse( { "test", "-w", "NoAssertions" } ) )
+with expansion:
+  {?}
+
+CmdLine.tests.cpp:<line number>: PASSED:
+  REQUIRE( config.warnings == WarnAbout::NoAssertions )
+with expansion:
+  1 == 1
+
+-------------------------------------------------------------------------------
+Parsing warnings
+  NoTests is no longer supported
+-------------------------------------------------------------------------------
+CmdLine.tests.cpp:<line number>
+...............................................................................
+
+CmdLine.tests.cpp:<line number>: PASSED:
+  REQUIRE_FALSE( cli.parse( { "test", "-w", "NoTests" } ) )
+with expansion:
+  !{?}
+
+-------------------------------------------------------------------------------
+Parsing warnings
+  Combining multiple warnings
+-------------------------------------------------------------------------------
+CmdLine.tests.cpp:<line number>
+...............................................................................
+
+CmdLine.tests.cpp:<line number>: PASSED:
+  REQUIRE( cli.parse( { "test", "--warn", "NoAssertions", "--warn", "UnmatchedTestSpec" } ) )
+with expansion:
+  {?}
+
+CmdLine.tests.cpp:<line number>: PASSED:
+  REQUIRE( config.warnings == ( WarnAbout::NoAssertions | WarnAbout::UnmatchedTestSpec ) )
+with expansion:
+  3 == 3
+
 -------------------------------------------------------------------------------
 Pointers can be compared to null
 -------------------------------------------------------------------------------
@@ -17275,6 +17321,6 @@ Misc.tests.cpp:<line number>
 Misc.tests.cpp:<line number>: PASSED:
 
 ===============================================================================
-test cases:  376 |  283 passed |  86 failed |  7 failed as expected
+test cases:  377 |  284 passed |  86 failed |  7 failed as expected
-assertions: 2166 | 1993 passed | 146 failed | 27 failed as expected
+assertions: 2171 | 1998 passed | 146 failed | 27 failed as expected
 

tests/SelfTest/Baselines/junit.sw.approved.txt

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <testsuitesloose text artifact
 >
-  <testsuite name="<exe-name>" errors="17" failures="129" tests="2166" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
+  <testsuite name="<exe-name>" errors="17" failures="129" tests="2171" hostname="tbd" time="{duration}" timestamp="{iso8601-timestamp}">
     <properties>
       <property name="random-seed" value="1"/>
       <property name="filters" value="~[!nonportable]~[!benchmark]~[approvals] *"/>
@@ -1070,6 +1070,9 @@ Message.tests.cpp:<line number>
     <testcase classname="<exe-name>.global" name="Parsing sharding-related cli flags/shard-index" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Parsing sharding-related cli flags/Negative shard index reports error" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Parsing sharding-related cli flags/Shard index 0 is accepted" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="Parsing warnings/NoAssertions" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="Parsing warnings/NoTests is no longer supported" time="{duration}" status="run"/>
+    <testcase classname="<exe-name>.global" name="Parsing warnings/Combining multiple warnings" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Pointers can be compared to null" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Precision of floating point stringification can be set/Floats" time="{duration}" status="run"/>
     <testcase classname="<exe-name>.global" name="Precision of floating point stringification can be set/Double" time="{duration}" status="run"/>

tests/SelfTest/Baselines/sonarqube.sw.approved.txt

@@ -52,6 +52,9 @@
     <testCase name="Parsing sharding-related cli flags/shard-index" duration="{duration}"/>
     <testCase name="Parsing sharding-related cli flags/Negative shard index reports error" duration="{duration}"/>
     <testCase name="Parsing sharding-related cli flags/Shard index 0 is accepted" duration="{duration}"/>
+    <testCase name="Parsing warnings/NoAssertions" duration="{duration}"/>
+    <testCase name="Parsing warnings/NoTests is no longer supported" duration="{duration}"/>
+    <testCase name="Parsing warnings/Combining multiple warnings" duration="{duration}"/>
     <testCase name="Process can be configured on command line/empty args don't cause a crash" duration="{duration}"/>
     <testCase name="Process can be configured on command line/default - no arguments" duration="{duration}"/>
     <testCase name="Process can be configured on command line/test lists/Specify one test case using" duration="{duration}"/>

tests/SelfTest/Baselines/tap.sw.approved.txt

@@ -2322,6 +2322,16 @@ ok {test-number} - result.errorMessage(), ContainsSubstring("Shard index must be
 ok {test-number} - cli.parse({ "test", "--shard-index=0" }) for: {?}
 # Parsing sharding-related cli flags
 ok {test-number} - config.shardIndex == 0 for: 0 == 0
+# Parsing warnings
+ok {test-number} - cli.parse( { "test", "-w", "NoAssertions" } ) for: {?}
+# Parsing warnings
+ok {test-number} - config.warnings == WarnAbout::NoAssertions for: 1 == 1
+# Parsing warnings
+ok {test-number} - !(cli.parse( { "test", "-w", "NoTests" } )) for: !{?}
+# Parsing warnings
+ok {test-number} - cli.parse( { "test", "--warn", "NoAssertions", "--warn", "UnmatchedTestSpec" } ) for: {?}
+# Parsing warnings
+ok {test-number} - config.warnings == ( WarnAbout::NoAssertions | WarnAbout::UnmatchedTestSpec ) for: 3 == 3
 # Pointers can be compared to null
 ok {test-number} - p == 0 for: 0 == 0
 # Pointers can be compared to null
@@ -4334,5 +4344,5 @@ ok {test-number} - q3 == 23. for: 23.0 == 23.0
 ok {test-number} -
 # xmlentitycheck
 ok {test-number} -
-1..2166
+1..2171
 

tests/SelfTest/Baselines/teamcity.sw.approved.txt

@@ -463,6 +463,8 @@ Message.tests.cpp:<line number>|nexplicit failure with message:|n  "Message from
 ##teamcity[testFinished name='Parse test names and tags' duration="{duration}"]
 ##teamcity[testStarted name='Parsing sharding-related cli flags']
 ##teamcity[testFinished name='Parsing sharding-related cli flags' duration="{duration}"]
+##teamcity[testStarted name='Parsing warnings']
+##teamcity[testFinished name='Parsing warnings' duration="{duration}"]
 ##teamcity[testStarted name='Pointers can be compared to null']
 ##teamcity[testFinished name='Pointers can be compared to null' duration="{duration}"]
 ##teamcity[testStarted name='Precision of floating point stringification can be set']

tests/SelfTest/Baselines/xml.sw.approved.txt

@@ -10679,6 +10679,58 @@ Nor would this
     </Section>
     <OverallResult success="true"/>
   </TestCase>
+  <TestCase name="Parsing warnings" tags="[cli][warnings]" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+    <Section name="NoAssertions" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+        <Original>
+          cli.parse( { "test", "-w", "NoAssertions" } )
+        </Original>
+        <Expanded>
+          {?}
+        </Expanded>
+      </Expression>
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+        <Original>
+          config.warnings == WarnAbout::NoAssertions
+        </Original>
+        <Expanded>
+          1 == 1
+        </Expanded>
+      </Expression>
+      <OverallResults successes="2" failures="0" expectedFailures="0"/>
+    </Section>
+    <Section name="NoTests is no longer supported" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+      <Expression success="true" type="REQUIRE_FALSE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+        <Original>
+          !(cli.parse( { "test", "-w", "NoTests" } ))
+        </Original>
+        <Expanded>
+          !{?}
+        </Expanded>
+      </Expression>
+      <OverallResults successes="1" failures="0" expectedFailures="0"/>
+    </Section>
+    <Section name="Combining multiple warnings" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+        <Original>
+          cli.parse( { "test", "--warn", "NoAssertions", "--warn", "UnmatchedTestSpec" } )
+        </Original>
+        <Expanded>
+          {?}
+        </Expanded>
+      </Expression>
+      <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/IntrospectiveTests/CmdLine.tests.cpp" >
+        <Original>
+          config.warnings == ( WarnAbout::NoAssertions | WarnAbout::UnmatchedTestSpec )
+        </Original>
+        <Expanded>
+          3 == 3
+        </Expanded>
+      </Expression>
+      <OverallResults successes="2" failures="0" expectedFailures="0"/>
+    </Section>
+    <OverallResult success="true"/>
+  </TestCase>
   <TestCase name="Pointers can be compared to null" filename="tests/<exe-name>/UsageTests/Condition.tests.cpp" >
     <Expression success="true" type="REQUIRE" filename="tests/<exe-name>/UsageTests/Condition.tests.cpp" >
       <Original>
@@ -20238,6 +20290,6 @@ loose text artifact
     </Section>
     <OverallResult success="true"/>
   </TestCase>
-  <OverallResults successes="1993" failures="146" expectedFailures="27"/>
+  <OverallResults successes="1998" failures="146" expectedFailures="27"/>
-  <OverallResultsCases successes="283" failures="86" expectedFailures="7"/>
+  <OverallResultsCases successes="284" failures="86" expectedFailures="7"/>
 </Catch2TestRun>

tests/SelfTest/IntrospectiveTests/CmdLine.tests.cpp

@@ -618,6 +618,28 @@ TEST_CASE("Parsing sharding-related cli flags", "[sharding]") {
 
 }
 
+TEST_CASE( "Parsing warnings", "[cli][warnings]" ) {
+    using Catch::WarnAbout;
+
+    Catch::ConfigData config;
+    auto cli = Catch::makeCommandLineParser( config );
+
+    SECTION( "NoAssertions" ) {
+        REQUIRE(cli.parse( { "test", "-w", "NoAssertions" } ));
+        REQUIRE( config.warnings == WarnAbout::NoAssertions );
+    }
+    SECTION( "NoTests is no longer supported" ) {
+        REQUIRE_FALSE(cli.parse( { "test", "-w", "NoTests" } ));
+    }
+    SECTION( "Combining multiple warnings" ) {
+        REQUIRE( cli.parse( { "test",
+                              "--warn", "NoAssertions",
+                              "--warn", "UnmatchedTestSpec" } ) );
+
+        REQUIRE( config.warnings == ( WarnAbout::NoAssertions | WarnAbout::UnmatchedTestSpec ) );
+    }
+}
+
 TEST_CASE("Test with special, characters \"in name", "[cli][regression]") {
     // This test case succeeds if we can invoke it from the CLI
     SUCCEED();