presets: Diagnose invalid test filter index types

Source/cmCMakePresetsErrors.cxx

@@ -252,6 +252,14 @@ void WORKFLOW_STEP_CONFIGURE_PRESET_MISMATCH(
     "\", but workflow configure preset is \"", workflowConfigurePreset, '"'));
 }
 
+void INVALID_TEST_FILTER_INCLUDE_INDEX(Json::Value const* value,
+                                       cmJSONState* state)
+{
+  state->AddErrorAtValue(
+    "Invalid \"filter.include.index\" field: expected a string or object",
+    value);
+}
+
 void NO_WORKFLOW_STEPS(std::string const& presetName, cmJSONState* state)
 {
   state->AddError(

Source/cmCMakePresetsErrors.h

@@ -98,6 +98,9 @@ void WORKFLOW_STEP_CONFIGURE_PRESET_MISMATCH(
   std::string const& stepConfigurePreset,
   std::string const& workflowConfigurePreset, cmJSONState* state);
 
+void INVALID_TEST_FILTER_INCLUDE_INDEX(Json::Value const* value,
+                                       cmJSONState* state);
+
 void NO_WORKFLOW_STEPS(std::string const& presetName, cmJSONState* state);
 
 void FIRST_WORKFLOW_STEP_NOT_CONFIGURE(std::string const& stepName,

Source/cmCMakePresetsGraphReadJSONTestPresets.cxx

@@ -162,6 +162,7 @@ bool TestPresetOptionalFilterIncludeIndexHelper(
     return TestPresetOptionalFilterIncludeIndexObjectHelper(out, value, state);
   }
 
+  cmCMakePresetsErrors::INVALID_TEST_FILTER_INCLUDE_INDEX(value, state);
   return false;
 }
 

Tests/RunCMake/CMakePresetsTest/InvalidFilterIncludeIndex-test-invalidIndex-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CMakePresetsTest/InvalidFilterIncludeIndex-test-invalidIndex-stderr.txt

@@ -0,0 +1,5 @@
+^CMake Error: Could not read presets from [^
+]*/Tests/RunCMake/CMakePresetsTest/InvalidFilterIncludeIndex:
+CMakePresets\.json:16: Invalid "filter.include.index" field: expected a string or object
+          "index": 42
+                   \^$

Tests/RunCMake/CMakePresetsTest/InvalidFilterIncludeIndex.json.in

@@ -0,0 +1,21 @@
+{
+  "version": 2,
+  "configurePresets": [
+    {
+      "name": "default",
+      "generator": "@RunCMake_GENERATOR@",
+      "binaryDir": "${sourceDir}/build"
+    }
+  ],
+  "testPresets": [
+    {
+      "name": "invalidIndex",
+      "configurePreset": "default",
+      "filter": {
+        "include": {
+          "index": 42
+        }
+      }
+    }
+  ]
+}

Tests/RunCMake/CMakePresetsTest/RunCMakeTest.cmake

@@ -122,6 +122,7 @@ run_cmake_test_presets(ConditionFuture "" "" "x")
 run_cmake_test_presets(TestOutputTruncationUnsupported "" "" "x")
 run_cmake_test_presets(OutputJUnitUnsupported "" "" "x")
 run_cmake_test_presets(InvalidJobs "" "" "x")
+run_cmake_test_presets(InvalidFilterIncludeIndex "" "" "invalidIndex")
 run_cmake_test_presets(JobsProcUnsupported "" "" "x")
 run_cmake_test_presets(PassthroughUnsupported "" "" "x")
 set(CMakePresets_SCHEMA_EXPECTED_RESULT 0)