fix: 'json' param type validator to support array-structured values a…

…s well.
lbc-team · Mar 27, 2020 · bd43dfb · bd43dfb
1 parent 5a9a249
commit bd43dfb
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/packages/buidler-core/src/internal/core/params/argumentTypes.ts b/packages/buidler-core/src/internal/core/params/argumentTypes.ts
@@ -256,17 +256,20 @@ export const json: ArgumentType<any> = {
   },
   /**
    * Check if argument value is of type "json"
-   * "json" validation succeeds if it is of "object" map-like {} type
-   * - this excludes 'null', function, date, regexp, etc./
+   * "json" validation succeeds if it is of "object map"-like structure or of "array" structure
+   * ie. this excludes 'null', function, numbers, date, regexp, etc.
    *
    * @param argName {string} argument's name - used for context in case of error.
    * @param value {any} argument's value to validate.
    *
    * @throws BDLR301 if value is not of type "json"
    */
   validate: (argName: string, value: any): void => {
+    const valueTypeString = Object.prototype.toString.call(value);
+
     const isJsonValue =
-      Object.prototype.toString.call(value) === "[object Object]";
+      valueTypeString === "[object Object]" ||
+      valueTypeString === "[object Array]";
 
     if (!isJsonValue) {
       throw new BuidlerError(ERRORS.ARGUMENTS.INVALID_VALUE_FOR_TYPE, {