Add tests for invalid numeric formats

staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/validation/validation_test.go

@@ -670,6 +670,62 @@ func TestValidateCustomResource(t *testing.T) {
 				},
 			},
 		},
+		{name: "numeric formats invalid",
+			schema: apiextensions.JSONSchemaProps{
+				Type: "object",
+				Properties: map[string]apiextensions.JSONSchemaProps{
+					"intThirtyTwo":  {Type: "integer", Format: "int32"},
+					"intSixtyFour":  {Type: "integer", Format: "int64"},
+					"floatThreeTwo": {Type: "number", Format: "float"},
+					"floatSixFour":  {Type: "number", Format: "double"},
+				},
+			},
+			failingObjects: []failingObject{
+				{
+					object: map[string]interface{}{"intThirtyTwo": int64(math.MaxInt32 + 1)},
+					expectErrs: []string{
+						`<nil>: Invalid value: "": Checked value must be of type integer with format int32 in intThirtyTwo`,
+					},
+				},
+				{
+					object: map[string]interface{}{"intThirtyTwo": int64(math.MinInt32 - 1)},
+					expectErrs: []string{
+						`<nil>: Invalid value: "": Checked value must be of type integer with format int32 in intThirtyTwo`,
+					},
+				},
+				// int64 overflow is not possible with int64 input, but we can test it with float64
+				{
+					object: map[string]interface{}{"intSixtyFour": float64(math.MaxInt64) * 1.1},
+					expectErrs: []string{
+						`intSixtyFour: Invalid value: "float64": intSixtyFour in body must be of type int64: "float64"`,
+						`<nil>: Invalid value: "": Checked value must be of type integer with format int64 in intSixtyFour`,
+					},
+				},
+				{
+					object: map[string]interface{}{"intSixtyFour": float64(math.MinInt64) * 1.1},
+					expectErrs: []string{
+						`intSixtyFour: Invalid value: "float64": intSixtyFour in body must be of type int64: "float64"`,
+						`<nil>: Invalid value: "": Checked value must be of type integer with format int64 in intSixtyFour`,
+					},
+				},
+				{
+					object: map[string]interface{}{"floatThreeTwo": float64(math.MaxFloat32 * 1.1)},
+					expectErrs: []string{
+						`<nil>: Invalid value: "": Checked value must be of type number with format float in floatThreeTwo`,
+					},
+				},
+				{
+					object: map[string]interface{}{"floatThreeTwo": float64(-math.MaxFloat32 * 1.1)},
+					expectErrs: []string{
+						`<nil>: Invalid value: "": Checked value must be of type number with format float in floatThreeTwo`,
+					},
+				},
+				// double overflow (float64) is handled by JSON parsing, but we can try to pass a value that might trigger it if not parsed as such.
+				// However, standard JSON unmarshalling usually caps at float64 limits or errors out.
+				// The validator itself checks ranges. Since Go's float64 matches double, true overflow is hard to represent without a custom numeric type.
+				// We will skip explicit double overflow tests here as they often result in +Inf/-Inf which might be handled differently or parse errors.
+			},
+		},
 	}
 	for _, tt := range tests {
 		compatVersion := tt.compatVersion