/
prefer-spy-on.test.ts
109 lines (107 loc) · 2.93 KB
/
prefer-spy-on.test.ts
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import { AST_NODE_TYPES, TSESLint } from '@typescript-eslint/utils';
import rule from '../prefer-spy-on';
import { espreeParser } from './test-utils';
const ruleTester = new TSESLint.RuleTester({
parser: espreeParser,
parserOptions: {
ecmaVersion: 2015,
},
});
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;',
output: "jest.spyOn(obj, 'a').mockImplementation(); const test = 10;",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: "Date['now'] = jest['fn']()",
output: "jest.spyOn(Date, 'now').mockImplementation()",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: 'window[`${name}`] = jest[`fn`]()',
output: 'jest.spyOn(window, `${name}`).mockImplementation()',
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: "obj['prop' + 1] = jest['fn']()",
output: "jest.spyOn(obj, 'prop' + 1).mockImplementation()",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: 'obj.one.two = jest.fn(); const test = 10;',
output:
"jest.spyOn(obj.one, 'two').mockImplementation(); const test = 10;",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: 'obj.a = jest.fn(() => 10)',
output: "jest.spyOn(obj, 'a').mockImplementation(() => 10)",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: "obj.a.b = jest.fn(() => ({})).mockReturnValue('default').mockReturnValueOnce('first call'); test();",
output:
"jest.spyOn(obj.a, 'b').mockImplementation(() => ({})).mockReturnValue('default').mockReturnValueOnce('first call'); test();",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
{
code: 'window.fetch = jest.fn(() => ({})).one.two().three().four',
output:
"jest.spyOn(window, 'fetch').mockImplementation(() => ({})).one.two().three().four",
errors: [
{
messageId: 'useJestSpyOn',
type: AST_NODE_TYPES.AssignmentExpression,
},
],
},
],
});