//	quantity('Mi') // error
//
// isQuantity
//
// Returns true if a string is a valid Quantity. isQuantity returns true if and
// only if quantity does not result in error.
//
//	isQuantity( <string>) <bool>
//
// Examples:
//
//	isQuantity('1.3G') // returns true
//	isQuantity('1.3Gi') // returns true
//	isQuantity('1,3G') // returns false
//	isQuantity('10000k') // returns true

		},
		{
			name:        "isQuantity",
			expr:        `isQuantity("20")`,
			expectValue: trueVal,
		},
		{
			name:        "isQuantity_megabytes",
			expr:        `isQuantity("20M")`,
			expectValue: trueVal,
		},
		{
			name:        "isQuantity_mebibytes",
			expr:        `isQuantity("20Mi")`,
			expectValue: trueVal,
		},
		{

		// Kubernetes <1.28>:
		"errored", "error",
		// Kubernetes <1.29>:
		"add", "asApproximateFloat", "asInteger", "compareTo", "isGreaterThan", "isInteger", "isLessThan", "isQuantity", "quantity", "sign", "sub",
		// Kubernetes <1.30>:

			},
		},
		{name: "quantity",
			obj:    objs("20", "200M"),
			schema: schemas(stringType, stringType),
			expectCost: map[string]int64{
				`isQuantity(self.val1)`: 3,
				`isQuantity(self.val2)`: 3,
				`isQuantity("200M")`:    1,
				`isQuantity("20Mi")`:    1,
				`quantity("200M") == quantity("0.2G") && quantity("0.2G") == quantity("200M")`:                                           6,

				cost += uint64(math.Ceil(float64(otherSize) * common.StringTraversalCostFactor))
			}

			return &cost
		}
	case "quantity", "isQuantity":
		if len(args) >= 1 {
			cost := uint64(math.Ceil(float64(actualSize(args[0])) * common.StringTraversalCostFactor))
			return &cost
		}
	case "validate":
		if len(args) >= 2 {

			expectRuntimeCost:   1,
		},
		{
			name:                "isQuantity",
			expr:                `isQuantity("20")`,
			expectEstimatedCost: checker.CostEstimate{Min: 1, Max: 1},
			expectRuntimeCost:   1,
		},
		{
			name:                "isQuantity_megabytes",
			expr:                `isQuantity("20M")`,
			expectEstimatedCost: checker.CostEstimate{Min: 1, Max: 1},
			expectRuntimeCost:   1,

			},
		},
		{name: "quantity",
			obj:    objs("20", "200M"),
			schema: schemas(stringType, stringType),
			valid: []string{
				"isQuantity(self.val1)",
				"isQuantity(self.val2)",
				`isQuantity("20Mi")`,
				`quantity(self.val2) == quantity("0.2G") && quantity("0.2G") == quantity("200M")`,