/
prefer-spy-on.test.js
109 lines (106 loc) · 2.73 KB
/
prefer-spy-on.test.js
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'use strict';
const { RuleTester } = require('eslint');
const rule = require('../prefer-spy-on');
const ruleTester = new RuleTester({
parserOptions: {
ecmaVersion: 6,
},
});
ruleTester.run('prefer-spy-on', rule, {
valid: [
'Date.now = () => 10',
'window.fetch = jest.fn',
'Date.now = fn()',
'obj.mock = jest.something()',
'const mock = jest.fn()',
'mock = jest.fn()',
'const mockObj = { mock: jest.fn() }',
'mockObj = { mock: jest.fn() }',
'window[`${name}`] = jest[`fn${expression}`]()',
],
invalid: [
{
code: 'obj.a = jest.fn(); const test = 10;',
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: "jest.spyOn(obj, 'a'); const test = 10;",
},
{
code: "Date['now'] = jest['fn']()",
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: "jest.spyOn(Date, 'now')",
},
{
code: 'window[`${name}`] = jest[`fn`]()',
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: 'jest.spyOn(window, `${name}`)',
},
{
code: "obj['prop' + 1] = jest['fn']()",
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: "jest.spyOn(obj, 'prop' + 1)",
},
{
code: 'obj.one.two = jest.fn(); const test = 10;',
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: "jest.spyOn(obj.one, 'two'); const test = 10;",
},
{
code: 'obj.a = jest.fn(() => 10)',
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output: "jest.spyOn(obj, 'a').mockImplementation(() => 10)",
},
{
code:
"obj.a.b = jest.fn(() => ({})).mockReturnValue('default').mockReturnValueOnce('first call'); test();",
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output:
"jest.spyOn(obj.a, 'b').mockImplementation(() => ({})).mockReturnValue('default').mockReturnValueOnce('first call'); test();",
},
{
code: 'window.fetch = jest.fn(() => ({})).one.two().three().four',
errors: [
{
message: 'Use jest.spyOn() instead.',
type: 'AssignmentExpression',
},
],
output:
"jest.spyOn(window, 'fetch').mockImplementation(() => ({})).one.two().three().four",
},
],
});