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39 lines
1.1 KiB
39 lines
1.1 KiB
/**
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* A helper class to aid in input validation.
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*
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* @internal
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*/
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export class Validation {
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public static assertString(val: any, name: string): void {
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if (typeof val !== "string") {
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throw new Error(`${name} must be a string but was: ${val}`);
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}
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}
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public static assertNumber(val: any, name: string): void {
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if (typeof val !== "number") {
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throw new Error(`${name} must be a number but was: ${val}`);
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}
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}
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public static assertDefined(val: any, name: string): void {
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if (val === undefined || val === null) {
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throw new Error(`${name} must be a defined but was: ${val}`);
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}
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}
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public static assertFunction(val: any, name: string): void {
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if (typeof val !== "function") {
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throw new Error(`${name} must be a function but was: ${typeof val}`);
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}
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}
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public static assertPosition(val: any, name: string): void {
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Validation.assertDefined(val, name);
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if (typeof val.lineNumber !== "number" || typeof val.column !== "number") {
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throw new Error(`${name} must be an Object like {lineNumber: number, column: number}: ${JSON.stringify(val)}`);
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}
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}
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}
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