CMake presets: What is a testpreset for?

Code
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If you want to use the presets in an IDE, you only need the configurePresets , or not?

If you do not know, what the binary directory is, you need the buildPresets too on console.

And with the cmake --build builddirpath --taget test you need no testPresets !

If the user has a Multi-Config project created, than the user may switch with --config i.e. from Debug to Release.

cmake . --preset=ninja-multi cmake --build --preset=ninja-multi --config Release
cmake --build --preset=ninja-multi --config Release --target help # or test, install, ... 
ctest --preset=ninja-multi --build-config Release

And perheps, see your preset list available for your host:
use cmake . --list-presets=all

But this does not work out of the box! see this post

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see for example remove garbage from mircosoft presets · ClausKlein/cpp_starter_project@c4cf772 · GitHub

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@kyle.edwards

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If used in workflow presets, the testPresets makes sense. i.e.:

cat CMakePresets.json

{
  "version": 6,
  "cmakeMinimumRequired": {
    "major": 3,
    "minor": 23,
    "patch": 0
  },
  "configurePresets": [
    {
      "name": "default",
      "displayName": "Default develop test Config",
      "description": "Default build using Ninja generator",
      "generator": "Ninja",
      "binaryDir": "${sourceParentDir}/build/test",
      "installDir": "${sourceParentDir}/stagedir",
      "cacheVariables": {
        "CMAKE_PREFIX_PATH": {
          "type": "path",
          "value": "${sourceParentDir}/stagedir"
        },
        "CMAKE_CXX_STANDARD": "20",
        "CMAKE_BUILD_TYPE": "Release",
        "CMAKE_DEBUG_POSTFIX": "D",
        "CPM_USE_LOCAL_PACKAGES": "NO",
        "BUILD_SHARED_LIBS": "YES",
        "TEST_INSTALLED_VERSION": "YES"
      },
      "environment": {
        "CPM_USE_LOCAL_PACKAGES": "YES",
        "PATH": "$env{HOME}/.local/bin${pathListSep}$penv{PATH}",
        "LD_LIBRARY_PATH": "${sourceParentDir}/stagedir/lib${pathListSep}penv{LD_LIBRARY_PATH}"
      }
    }
  ],
  "buildPresets": [
    {
      "name": "default",
      "configurePreset": "default"
    }
  ],
  "testPresets": [
    {
      "name": "default",
      "configurePreset": "default",
      "output": {"outputOnFailure": true},
      "execution": {"noTestsAction": "error", "stopOnFailure": true}
    }
  ],
  "packagePresets": [
    {
      "name": "default",
      "configurePreset": "default",
      "generators": [
        "TGZ"
      ]
    }
  ],
  "workflowPresets": [
    {
      "name": "default",
      "steps": [
        {
          "type": "configure",
          "name": "default"
        },
        {
          "type": "build",
          "name": "default"
        },
        {
          "type": "test",
          "name": "default"
        }
      ]
    }
  ]
}