graphql-mocks/graphql/utils/attach-scalars-to-schema.js

Tools for setting up graphql test resolvers

'use strict';

var graphql = require('graphql');
var isScalarDefinition = require('../type-utils/is-scalar-definition.js');
function attachScalarsToSchema(schema, scalarMap) {
  for (const scalarTypeName in scalarMap) {
    const scalarType = schema.getType(scalarTypeName);
    if (!scalarType) {
      throw new Error(`Could not find any type named "${scalarTypeName}". Double-check the scalar map where "${scalarTypeName}" is referenced against scalars defined in the graphql schema.`);
    }
    if (!graphql.isScalarType(scalarType)) {
      throw new Error(`Could not find a scalar type of "${scalarTypeName}". Double-check the scalar map where "${scalarTypeName}" is referenced against scalars defined in the graphql schema.`);
    }
    const scalarDefinition = scalarMap[scalarTypeName];
    if (!isScalarDefinition.isScalarDefinition(scalarDefinition)) {
      throw new Error(`Passed a scalar map with ${scalarTypeName} but it is not a proper scalar definition`);
    }
    // copy over keys from scalar defintion on to scalary instance
    for (const key in scalarDefinition) {
      if (key === 'name') {
        continue;
      }
      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      scalarType[key] = scalarDefinition[key];
    }
  }
}
exports.attachScalarsToSchema = attachScalarsToSchema;
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