superset/superset-frontend/packages/superset-ui-core/test/dimension/computeMaxFontSize.test.ts

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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
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import { computeMaxFontSize } from '@superset-ui/core';
import { addDummyFill, removeDummyFill, SAMPLE_TEXT } from './getBBoxDummyFill';

describe('computeMaxFontSize(input)', () => {
  describe('returns dimension of the given text', () => {
    beforeEach(addDummyFill);
    afterEach(removeDummyFill);

    it('requires either idealFontSize or maxHeight', () => {
      expect(() => {
        computeMaxFontSize({
          text: SAMPLE_TEXT[0],
        });
      }).toThrow();
    });
    it('computes maximum font size for given maxWidth and maxHeight', () => {
      expect(
        computeMaxFontSize({
          maxWidth: 400,
          maxHeight: 30,
          text: 'sample text',
        }),
      ).toEqual(30);
    });
    it('computes maximum font size for given idealFontSize and maxHeight', () => {
      expect(
        computeMaxFontSize({
          maxHeight: 20,
          idealFontSize: 40,
          text: SAMPLE_TEXT[0],
        }),
      ).toEqual(20);
    });
    it('computes maximum font size for given maxWidth and idealFontSize', () => {
      expect(
        computeMaxFontSize({
          maxWidth: 250,
          idealFontSize: 40,
          text: SAMPLE_TEXT[0],
        }),
      ).toEqual(25);
    });
    it('ensure idealFontSize is used if the maximum font size calculation goes below zero', () => {
      expect(
        computeMaxFontSize({
          maxWidth: 5,
          idealFontSize: 34,
          text: SAMPLE_TEXT[0],
        }),
      ).toEqual(34);
    });
  });
});