| /* eslint-env mocha */ |
| /* eslint no-template-curly-in-string: 0 */ |
| import assert from 'assert'; |
| import { |
| extractProp, |
| describeIfNotBabylon, |
| changePlugins, |
| setParserName, |
| } from '../helper'; |
| import { getLiteralPropValue } from '../../src/getPropValue'; |
| |
| describe('getLiteralPropValue', () => { |
| beforeEach(() => { |
| setParserName('flow'); |
| }); |
| it('should export a function', () => { |
| const expected = 'function'; |
| const actual = typeof getLiteralPropValue; |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return undefined when not provided with a JSXAttribute', () => { |
| const expected = undefined; |
| const actual = getLiteralPropValue(1); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should not throw error when trying to get value from unknown node type', () => { |
| const prop = { |
| type: 'JSXAttribute', |
| value: { |
| type: 'JSXExpressionContainer', |
| }, |
| }; |
| let counter = 0; |
| // eslint-disable-next-line no-console |
| const errorOrig = console.error; |
| // eslint-disable-next-line no-console |
| console.error = () => { |
| counter += 1; |
| }; |
| let value; |
| assert.doesNotThrow(() => { |
| value = getLiteralPropValue(prop); |
| }, Error); |
| |
| assert.equal(null, value); |
| assert.equal(counter, 1); |
| // eslint-disable-next-line no-console |
| console.error = errorOrig; |
| }); |
| |
| describe('Null', () => { |
| it('should return true when no value is given', () => { |
| const prop = extractProp('<div foo />'); |
| |
| const expected = true; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Literal', () => { |
| it('should return correct string if value is a string', () => { |
| const prop = extractProp('<div foo="bar" />'); |
| |
| const expected = 'bar'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return correct string if value is a string expression', () => { |
| const prop = extractProp('<div foo={"bar"} />'); |
| |
| const expected = 'bar'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return correct integer if value is a integer expression', () => { |
| const prop = extractProp('<div foo={1} />'); |
| |
| const expected = 1; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should convert "true" to boolean type', () => { |
| const prop = extractProp('<div foo="true" />'); |
| |
| const expected = true; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should convert "TrUE" to boolean type', () => { |
| const prop = extractProp('<div foo="TrUE" />'); |
| |
| const expected = true; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should convert "false" to boolean type', () => { |
| const prop = extractProp('<div foo="false" />'); |
| |
| const expected = false; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should convert "FaLsE" to boolean type', () => { |
| const prop = extractProp('<div foo="FaLsE" />'); |
| |
| const expected = false; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return String null when value is null', () => { |
| const prop = extractProp('<div foo={null} />'); |
| |
| const expected = 'null'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('JSXElement', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={<bar />} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Identifier', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={bar} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return undefined when identifier is literally `undefined`', () => { |
| const prop = extractProp('<div foo={undefined} />'); |
| |
| const expected = undefined; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Template literal', () => { |
| it('should return template literal with vars wrapped in curly braces', () => { |
| const prop = extractProp('<div foo={`bar ${baz}`} />'); |
| |
| const expected = 'bar {baz}'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return string "undefined" for expressions that evaluate to undefined', () => { |
| const prop = extractProp('<div foo={`bar ${undefined}`} />'); |
| |
| const expected = 'bar undefined'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Tagged Template literal', () => { |
| it('should return template literal with vars wrapped in curly braces', () => { |
| const prop = extractProp('<div foo={noop`bar ${baz}`} />'); |
| |
| const expected = 'bar {baz}'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return string "undefined" for expressions that evaluate to undefined', () => { |
| const prop = extractProp('<div foo={noop`bar ${undefined}`} />'); |
| |
| const expected = 'bar undefined'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Arrow function expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={ () => { return "bar"; }} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Function expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={ function() { return "bar"; } } />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Logical expression', () => { |
| it('should return null for && operator', () => { |
| const prop = extractProp('<div foo={bar && baz} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return null for || operator', () => { |
| const prop = extractProp('<div foo={bar || baz} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Member expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={bar.baz} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Call expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={bar()} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Unary expression', () => { |
| it('should correctly evaluate an expression that prefixes with -', () => { |
| const prop = extractProp('<div foo={-bar} />'); |
| |
| // -"bar" => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with -', () => { |
| const prop = extractProp('<div foo={-42} />'); |
| |
| const expected = -42; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with +', () => { |
| const prop = extractProp('<div foo={+bar} />'); |
| |
| // +"bar" => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with +', () => { |
| const prop = extractProp('<div foo={+42} />'); |
| |
| const expected = 42; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with !', () => { |
| const prop = extractProp('<div foo={!bar} />'); |
| |
| const expected = false; // !"bar" === false |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with ~', () => { |
| const prop = extractProp('<div foo={~bar} />'); |
| |
| const expected = -1; // ~"bar" === -1 |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return true when evaluating `delete foo`', () => { |
| const prop = extractProp('<div foo={delete x} />'); |
| |
| const expected = true; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return undefined when evaluating `void foo`', () => { |
| const prop = extractProp('<div foo={void x} />'); |
| |
| const expected = undefined; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| // TODO: We should fix this to check to see if we can evaluate it. |
| it('should return undefined when evaluating `typeof foo`', () => { |
| const prop = extractProp('<div foo={typeof x} />'); |
| |
| const expected = undefined; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Update expression', () => { |
| it('should correctly evaluate an expression that prefixes with ++', () => { |
| const prop = extractProp('<div foo={++bar} />'); |
| |
| // ++"bar" => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that prefixes with --', () => { |
| const prop = extractProp('<div foo={--bar} />'); |
| |
| // --"bar" => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that suffixes with ++', () => { |
| const prop = extractProp('<div foo={bar++} />'); |
| |
| // "bar"++ => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should correctly evaluate an expression that suffixes with --', () => { |
| const prop = extractProp('<div foo={bar--} />'); |
| |
| // "bar"-- => NaN |
| const expected = true; |
| const actual = Number.isNaN(getLiteralPropValue(prop)); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('This expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={this} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Conditional expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={bar ? baz : bam} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Binary expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={1 == "1"} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| |
| describe('Object expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={ { bar: "baz" } } />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.deepEqual(expected, actual); |
| }); |
| }); |
| |
| describe('New expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={new Bar()} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.deepEqual(expected, actual); |
| }); |
| }); |
| |
| describe('Array expression', () => { |
| it('should evaluate to correct representation of the the array in props', () => { |
| const prop = extractProp('<div foo={["bar", 42, null]} />'); |
| |
| const expected = ['bar', 42]; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.deepEqual(expected, actual); |
| }); |
| }); |
| |
| it('should return an empty array provided an empty array in props', () => { |
| const prop = extractProp('<div foo={[]} />'); |
| |
| const expected = []; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.deepEqual(expected, actual); |
| }); |
| |
| describe('Bind expression', () => { |
| it('should return null', () => { |
| const prop = extractProp('<div foo={::this.handleClick} />'); |
| |
| const expected = 'null'; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.deepEqual(expected, actual); |
| }); |
| }); |
| |
| describeIfNotBabylon('Typescript', () => { |
| beforeEach(() => { |
| changePlugins(pls => [...pls, 'typescript']); |
| }); |
| |
| it('should return string representation of variable identifier wrapped in a Typescript non-null assertion', () => { |
| const prop = extractProp('<div foo={bar!} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return string representation of variable identifier wrapped in a deep Typescript non-null assertion', () => { |
| const prop = extractProp('<div foo={(bar!)!} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| |
| it('should return string representation of variable identifier wrapped in a Typescript type coercion', () => { |
| changePlugins(pls => [...pls, 'typescript']); |
| const prop = extractProp('<div foo={bar as any} />'); |
| |
| const expected = null; |
| const actual = getLiteralPropValue(prop); |
| |
| assert.equal(expected, actual); |
| }); |
| }); |
| }); |