How to use findPlugin method in Jest

Best JavaScript code snippet using jest

dyn2.js

Source: dyn2.js Github

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...6 document.enablePackage(libsbml.DynExtension.prototype.getXmlnsL3V1V1(), 'dyn', true)7 document.enablePackage(libsbml.CompExtension.prototype.getXmlnsL3V1V1(), 'comp', true)8 document.setPackageRequired("dyn", true)9 document.setPackageRequired("comp", true)10 const distdoc = libsbml.castObject(document.findPlugin("dyn"), libsbml.DistribSBMLDocumentPlugin)11 const model = document.createModel()12 model.setId('singleCell')13 const parser = new libsbml.SBMLFormulaParser()14 /​/​ create the Compartment15 let compartment = model.createCompartment()16 compartment.setId("Loc1")17 compartment.setConstant(false)18 compartment.setSize(1)19 compartment.setSpatialDimensions(2.0)20 let cplugin = libsbml.castObject(compartment.findPlugin("dyn"), libsbml.DynCompartmentPlugin)21 let component = cplugin.createSpatialComponent()22 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANX)23 component.setVariable("q1_X")24 component = cplugin.createSpatialComponent()25 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANY)26 component.setVariable("q1_Y")27 let compPlugin = libsbml.castObject(compartment.findPlugin("comp"), libsbml.CompSBasePlugin)28 let relement = compPlugin.createReplacedElement()29 relement.setIdRef("C")30 relement.setSubmodelRef("GRID_1_1_cell")31 compartment = model.createCompartment()32 compartment.setId("Loc2")33 compartment.setConstant(false)34 compartment.setSize(1)35 compartment.setSpatialDimensions(2.0)36 cplugin = libsbml.castObject(compartment.findPlugin("dyn"), libsbml.DynCompartmentPlugin)37 component = cplugin.createSpatialComponent()38 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANX)39 component.setVariable("q2_X")40 component = cplugin.createSpatialComponent()41 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANY)42 component.setVariable("q2_Y")43 compPlugin = libsbml.castObject(compartment.findPlugin("comp"), libsbml.CompSBasePlugin)44 relement = compPlugin.createReplacedElement()45 relement.setIdRef("C")46 relement.setSubmodelRef("GRID_1_2_cell")47 compartment = model.createCompartment()48 compartment.setId("Loc3")49 compartment.setConstant(false)50 compartment.setSize(1)51 compartment.setSpatialDimensions(2.0)52 cplugin = libsbml.castObject(compartment.findPlugin("dyn"), libsbml.DynCompartmentPlugin)53 component = cplugin.createSpatialComponent()54 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANX)55 component.setVariable("q3_X")56 component = cplugin.createSpatialComponent()57 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANY)58 component.setVariable("q3_Y")59 compPlugin = libsbml.castObject(compartment.findPlugin("comp"), libsbml.CompSBasePlugin)60 relement = compPlugin.createReplacedElement()61 relement.setIdRef("C")62 relement.setSubmodelRef("GRID_2_1_cell")63 compartment = model.createCompartment()64 compartment.setId("Loc4")65 compartment.setConstant(false)66 compartment.setSize(1)67 compartment.setSpatialDimensions(2.0)68 cplugin = libsbml.castObject(compartment.findPlugin("dyn"), libsbml.DynCompartmentPlugin)69 component = cplugin.createSpatialComponent()70 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANX)71 component.setVariable("q4_X")72 component = cplugin.createSpatialComponent()73 component.setSpatialIndex(libsbml.DYN_SPATIALKIND_CARTESIANY)74 component.setVariable("q4_Y")75 compPlugin = libsbml.castObject(compartment.findPlugin("comp"), libsbml.CompSBasePlugin)76 relement = compPlugin.createReplacedElement()77 relement.setIdRef("C")78 relement.setSubmodelRef("GRID_2_2_cell")79 /​/​ create Parameters80 let param = model.createParameter()81 param.initDefaults()82 param.setId("q1_X")83 param.setValue(1)84 param = model.createParameter()85 param.initDefaults()86 param.setId("q1_Y")87 param.setValue(1)88 param = model.createParameter()89 param.initDefaults()90 param.setId("q2_X")91 param.setValue(2)92 param = model.createParameter()93 param.initDefaults()94 param.setId("q2_Y")95 param.setValue(1)96 param = model.createParameter()97 param.initDefaults()98 param.setId("q3_X")99 param.setValue(1)100 param = model.createParameter()101 param.initDefaults()102 param.setId("q3_Y")103 param.setValue(2)104 param = model.createParameter()105 param.initDefaults()106 param.setId("q4_X")107 param.setValue(2)108 param = model.createParameter()109 param.initDefaults()110 param.setId("q4_Y")111 param.setValue(2)112 /​/​ create SubModels113 const mplugin = libsbml.castObject(model.findPlugin("comp"), libsbml.CompModelPlugin)114 let submodel = mplugin.createSubmodel()115 submodel.setId("GRID_1_1_cell")116 submodel.setModelRef("Cell")117 submodel = mplugin.createSubmodel()118 submodel.setId("GRID_1_2_cell")119 submodel.setModelRef("Cell")120 submodel = mplugin.createSubmodel()121 submodel.setId("GRID_2_1_cell")122 submodel.setModelRef("Cell")123 submodel = mplugin.createSubmodel()124 submodel.setId("GRID_2_2_cell")125 submodel.setModelRef("Cell")126 /​/​ create the ModelDefinition127 const dplugin = libsbml.castObject(document.findPlugin("comp"), libsbml.CompSBMLDocumentPlugin)128 const mdef = dplugin.createModelDefinition()129 mdef.setId("Cell")130 compartment = mdef.createCompartment()131 compartment.initDefaults()132 compartment.setId("C")133 compartment.setSpatialDimensions(2.0)134 compartment.setSize(1.0)135 let species = mdef.createSpecies()136 species.setId("R")137 species.setCompartment("C")138 species.setHasOnlySubstanceUnits(false)139 species.setBoundaryCondition(false)140 species.setConstant(false)141 species = mdef.createSpecies()142 species.setId("S")143 species.setCompartment("C")144 species.setHasOnlySubstanceUnits(false)145 species.setBoundaryCondition(false)146 species.setConstant(false)147 let reaction = mdef.createReaction()148 reaction.setId("Degradation_R")149 reaction.setReversible(false)150 reaction.setCompartment("C")151 let reactant = reaction.createReactant();152 reactant.setSpecies("R")153 reactant.setStoichiometry(1)154 reactant.setConstant(true)155 reaction = mdef.createReaction()156 reaction.setId("Degradation_S")157 reaction.setReversible(false)158 reaction.setCompartment("C")159 reactant = reaction.createReactant()160 reactant.setSpecies("S")161 reactant.setStoichiometry(1)162 reactant.setConstant(true)163 document.checkConsistency()164 const event = mdef.createEvent()165 event.setId("event0")166 event.setUseValuesFromTriggerTime(false)167 const eplugin = libsbml.castObject(event.findPlugin("dyn"), libsbml.DynEventPlugin)168 eplugin.setApplyToAll(true)169 eplugin.setCboTerm("http:/​/​cbo.biocomplexity.indiana.edu/​svn/​cbo/​trunk/​CBO_1_0.owl#CellDivision")170 const trigger = event.createTrigger()171 trigger.setInitialValue(false)172 trigger.setPersistent(false)173 trigger.setMath(parser.parseL3Formula("true"))174 const writer = new libsbml.SBMLWriter()175 const serializedSBML = writer.writeSBMLToString(document)176 console.log(serializedSBML)177 libsbml.destroy(document)178 } catch(error) {179 console.log(error.stack)180 }181})

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findPluginSpec.js

Source: findPluginSpec.js Github

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...19 loadPlugin.reset();20 });21 it('grunt-contrib-foo', () => {22 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(true);23 jit.findPlugin('foo');24 assert.deepEqual(25 loadPlugin.getCall(0).args,26 ['grunt-contrib-foo', path.resolve('node_modules/​grunt-contrib-foo/​tasks')]);27 });28 it('grunt-foo', () => {29 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);30 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(true);31 jit.findPlugin('foo');32 assert.deepEqual(33 loadPlugin.getCall(0).args,34 ['grunt-foo', path.resolve('node_modules/​grunt-foo/​tasks')]);35 });36 it('foo', () => {37 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);38 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(false);39 existsSync.withArgs(path.resolve('node_modules/​foo/​tasks')).returns(true);40 jit.findPlugin('foo');41 assert.deepEqual(42 loadPlugin.getCall(0).args,43 ['foo', path.resolve('node_modules/​foo/​tasks')]);44 });45 it('CamelCase', () => {46 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo-bar/​tasks')).returns(false);47 existsSync.withArgs(path.resolve('node_modules/​grunt-foo-bar/​tasks')).returns(true);48 jit.findPlugin('fooBar');49 assert.deepEqual(50 loadPlugin.getCall(0).args,51 ['grunt-foo-bar', path.resolve('node_modules/​grunt-foo-bar/​tasks')]);52 });53 it('snake_case', () => {54 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo-bar/​tasks')).returns(false);55 existsSync.withArgs(path.resolve('node_modules/​grunt-foo-bar/​tasks')).returns(false);56 existsSync.withArgs(path.resolve('node_modules/​foo-bar/​tasks')).returns(true);57 jit.findPlugin('foo_bar');58 assert.deepEqual(59 loadPlugin.getCall(0).args,60 ['foo-bar', path.resolve('node_modules/​foo-bar/​tasks')]);61 });62 it('Custom task', () => {63 jit.customTasksDir = path.resolve('custom');64 existsSync.withArgs(path.resolve('custom/​foo.js')).returns(true);65 jit.findPlugin('foo');66 assert.deepEqual(67 loadPlugin.getCall(0).args,68 ['foo', path.resolve('custom/​foo.js'), true]);69 });70 it('Custom task: CoffeeScript', () => {71 jit.customTasksDir = path.resolve('custom');72 existsSync.withArgs(path.resolve('custom/​foo.js')).returns(false);73 existsSync.withArgs(path.resolve('custom/​foo.coffee')).returns(true);74 jit.findPlugin('foo');75 assert.deepEqual(76 loadPlugin.getCall(0).args,77 ['foo', path.resolve('custom/​foo.coffee'), true]);78 });79 it('findUp', () => {80 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);81 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(false);82 existsSync.withArgs(path.resolve('node_modules/​foo/​tasks')).returns(false);83 existsSync.withArgs(path.resolve('../​node_modules/​grunt-contrib-foo/​tasks')).returns(true);84 jit.findPlugin('foo');85 assert.deepEqual(86 loadPlugin.getCall(0).args,87 ['grunt-contrib-foo', path.resolve('../​node_modules/​grunt-contrib-foo/​tasks')]);88 });89 it('not Found', () => {90 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);91 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(false);92 existsSync.withArgs(path.resolve('node_modules/​foo/​tasks')).returns(false);93 existsSync.withArgs(path.resolve('../​node_modules/​grunt-contrib-foo/​tasks')).returns(false);94 jit.findPlugin('foo');95 assert(loadPlugin.callCount === 0);96 });97 it('Static mapping', () => {98 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-bar/​tasks')).returns(false);99 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(true);100 jit.findPlugin('bar');101 assert.deepEqual(102 loadPlugin.getCall(0).args,103 ['grunt-foo', path.resolve('node_modules/​grunt-foo/​tasks')]);104 });105 it('Static mapping for private module', () => {106 jit.mappings = {107 foo: '@abc/​grunt-foo'108 };109 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);110 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(false);111 existsSync.withArgs(path.resolve('node_modules/​foo/​tasks')).returns(false);112 existsSync.withArgs(path.resolve('node_modules/​@abc/​grunt-foo/​tasks')).returns(true);113 jit.findPlugin('foo');114 assert.deepEqual(115 loadPlugin.getCall(0).args,116 ['@abc/​grunt-foo', path.resolve('node_modules/​@abc/​grunt-foo/​tasks')]);117 });118 it('Static mapping for custom task', () => {119 jit.mappings = {120 foo: 'custom/​foo.js'121 };122 existsSync.withArgs(path.resolve('node_modules/​grunt-contrib-foo/​tasks')).returns(false);123 existsSync.withArgs(path.resolve('node_modules/​grunt-foo/​tasks')).returns(false);124 existsSync.withArgs(path.resolve('node_modules/​foo/​tasks')).returns(false);125 existsSync.withArgs(path.resolve('custom/​foo.js')).returns(true);126 jit.findPlugin('foo');127 assert.deepEqual(128 loadPlugin.getCall(0).args,129 ['foo', path.resolve('custom/​foo.js'), true]);130 });131 it('Other node_modules dir', () => {132 jit.pluginsRoot = 'other/​dir';133 existsSync.withArgs(path.resolve('other/​dir/​grunt-contrib-foo/​tasks')).returns(false);134 existsSync.withArgs(path.resolve('other/​dir/​grunt-foo/​tasks')).returns(false);135 existsSync.withArgs(path.resolve('other/​dir/​foo/​tasks')).returns(true);136 jit.findPlugin('foo');137 assert.deepEqual(138 loadPlugin.getCall(0).args,139 ['foo', path.resolve('other/​dir/​foo/​tasks')]);140 });...

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createKarmaConfig-test.js

Source: createKarmaConfig-test.js Github

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...13 let plugin = {'framework:test': []}14 expect(processPluginConfig([plugin])).toEqual([['test'], [plugin]])15 })16})17describe('findPlugin()', () => {18 let plugins = ['foo', plugin, 'bar']19 it('finds a plugin by type:name identifier', () => {20 expect(findPlugin(plugins, 'framework:test')).toBe(plugin)21 })22 it('returns null if no matching identifier is found', () => {23 expect(findPlugin(plugins, 'framework:best')).toBe(null)24 })25})26describe('getKarmaPluginConfig()', function() {27 this.timeout(10000)28 describe('without user config', () => {29 let expectedDefaultPlugins = [30 'launcher:Chrome',31 'preprocessor:sourcemap',32 'preprocessor:webpack',33 'framework:mocha',34 'reporter:mocha',35 ]36 it('defaults to Mocha and ChromeHeadless', () => {37 let {browsers, frameworks, reporters, plugins} = getKarmaPluginConfig()38 expect(browsers).toEqual(['ChromeHeadless'])39 expect(frameworks).toEqual(['mocha', 'webpack'])40 expect(reporters).toEqual(['mocha'])41 expectedDefaultPlugins.forEach(plugin =>42 expect(findPlugin(plugins, plugin)).toExist()43 )44 })45 it('adds coverage config when asked to', () => {46 let {browsers, frameworks, reporters, plugins} = getKarmaPluginConfig({codeCoverage: true})47 expect(browsers).toEqual(['ChromeHeadless'])48 expect(frameworks).toEqual(['mocha', 'webpack'])49 expect(reporters).toEqual(['mocha', 'coverage'])50 expectedDefaultPlugins.concat(['preprocessor:coverage']).forEach(plugin => {51 expect(findPlugin(plugins, plugin)).toExist()52 })53 })54 })55 describe('with user config', () => {56 let tapeFramework = {'framework:tape': []}57 let tapReporter = {'reporter:tap': []}58 it('defaults the reporter to dots if only a framework plugin is configured', () => {59 let {frameworks, reporters, plugins} = getKarmaPluginConfig({60 userConfig: {61 frameworks: [tapeFramework],62 },63 })64 expect(frameworks).toEqual(['tape', 'webpack'])65 expect(reporters).toEqual(['dots'])66 expect(findPlugin(plugins, 'framework:tape')).toExist()67 })68 it('defaults the reporter to dots if only a framework name and plugin is configured', () => {69 let {frameworks, reporters, plugins} = getKarmaPluginConfig({70 userConfig: {71 frameworks: ['tape'],72 plugins: [tapeFramework],73 },74 })75 expect(frameworks).toEqual(['tape', 'webpack'])76 expect(reporters).toEqual(['dots'])77 expect(findPlugin(plugins, 'framework:tape')).toExist()78 })79 it('uses the given reporter if a plugin is also configured', () => {80 let {frameworks, reporters, plugins} = getKarmaPluginConfig({81 userConfig: {82 frameworks: [tapeFramework],83 reporters: [tapReporter],84 },85 })86 expect(frameworks).toEqual(['tape', 'webpack'])87 expect(reporters).toEqual(['tap'])88 expect(findPlugin(plugins, 'framework:tape')).toExist()89 expect(findPlugin(plugins, 'reporter:tap')).toExist()90 })91 it('uses the given reporter if a name plugin is also configured', () => {92 let {frameworks, reporters, plugins} = getKarmaPluginConfig({93 userConfig: {94 frameworks: ['tape'],95 reporters: ['tap'],96 plugins: [tapeFramework, tapReporter],97 },98 })99 expect(frameworks).toEqual(['tape', 'webpack'])100 expect(reporters).toEqual(['tap'])101 expect(findPlugin(plugins, 'framework:tape')).toExist()102 expect(findPlugin(plugins, 'reporter:tap')).toExist()103 })104 it('makes sure the Mocha plugins will be loaded when necessary', () => {105 let {frameworks, reporters, plugins} = getKarmaPluginConfig({106 userConfig: {107 frameworks: ['mocha', 'chai', 'chai-as-promised'],108 reporters: ['mocha'],109 plugins: [{'framework: chai': []}],110 },111 })112 expect(frameworks).toEqual(['mocha', 'chai', 'chai-as-promised', 'webpack'])113 expect(reporters).toEqual(['mocha'])114 expect(findPlugin(plugins, 'framework:mocha')).toExist()115 expect(findPlugin(plugins, 'reporter:mocha')).toExist()116 expect(findPlugin(plugins, 'framework: chai')).toExist()117 })118 it('makes sure the Chrome launcher plugin will be loaded when necessary', () => {119 let {browsers, plugins} = getKarmaPluginConfig({120 userConfig: {121 browsers: ['Chrome']122 },123 })124 expect(browsers).toEqual(['Chrome'])125 expect(findPlugin(plugins, 'launcher:Chrome')).toExist()126 })127 })128})129describe('createKarmaConfig()', () => {130 it('includes default test files pattern', () => {131 let config = createKarmaConfig({}, {}, {}, {})132 expect(config.files).toEqual([133 '+(src|test?(s))/​**/​*+(.spec|.test).js',134 ])135 })136 it('includes default mocha reporter config', () => {137 let config = createKarmaConfig({}, {}, {}, {})138 expect(config.mochaReporter).toEqual({showDiff: true})139 })...

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index.spec.js

Source: index.spec.js Github

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1const mockExists = jest.fn();2jest.mock('./​module-exists', () => mockExists);3const configPreset = require('./​index');4const defaultSettings = require('./​default-settings');5function findPlugin(pluginList, expectedPlugin) {6 return pluginList.find(plugin =>7 Array.isArray(plugin)8 ? plugin[0] === expectedPlugin9 : plugin === expectedPlugin10 );11}12it('can exclude react preset', () => {13 let { presets } = configPreset();14 expect(presets[1]).toBe(require('@babel/​preset-react'));15 ({ presets } = configPreset(null, { react: false }));16 expect(presets[1]).toBeUndefined();17});18describe('babel-plugin-extract-format-message', () => {19 const plugin = require('babel-plugin-extract-format-message');20 it('can be excluded', () => {21 let { plugins } = configPreset();22 expect(findPlugin(plugins, plugin)).not.toBeFalsy();23 ({ plugins } = configPreset(null, { extractFormatMessage: false }));24 expect(findPlugin(plugins)).toBeFalsy();25 });26 it('consumes the default options', () => {27 const { plugins } = configPreset();28 const settings = findPlugin(plugins, plugin)[1]29 expect(settings).toMatchObject(defaultSettings.extractFormatMessage);30 });31});32describe('babel-plugin-transform-format-message', () => {33 const plugin = require('babel-plugin-transform-format-message');34 it('can be excluded', () => {35 let { plugins } = configPreset();36 expect(findPlugin(plugins, plugin)).not.toBeFalsy();37 ({ plugins } = configPreset(null, { transformFormatMessage: false }));38 expect(findPlugin(plugins, plugin)).toBeFalsy();39 });40 it('consume the default options', () => {41 const { plugins } = configPreset();42 const settings = findPlugin(plugins, plugin)[1]43 expect(settings).toMatchObject(defaultSettings.transformFormatMessage);44 });45});46describe('babel-plugin-styled-components', () => {47 const plugin = require('babel-plugin-styled-components');48 it('is excluded if project is not using styled-components', () => {49 const { plugins } = configPreset();50 expect(findPlugin(plugins, plugin)).toBeFalsy();51 });52 it('is inlcuded if styled-components is present', () => {53 mockExists.mockReturnValueOnce(true);54 const { plugins } = configPreset();55 expect(findPlugin(plugins, plugin)[0]).toBe(plugin);56 });...

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getResource.js

Source: getResource.js Github

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1import { resources } from '../​../​lib/​conf'2import { getResource } from '../​getResource'3import { findPlugin } from '../​findPlugin'4jest.mock('../​findPlugin')5beforeEach(() => {6 Object.keys(resources).forEach(key => delete resources[key])7})8test('If exists the resource returns the resource', () => {9 resources.test = Math.random()10 expect(getResource('test')).toEqual(resources.test)11})12test('If exists the resource, does not call findPlugin', () => {13 resources.test = Math.random()14 getResource('test')15 expect(findPlugin).not.toHaveBeenCalled()16})17test('If not exists the resource, call findPlugin (plugin no exists, so throw)', () => {18 expect(() => getResource('test')).toThrow()19 expect(findPlugin).toHaveBeenCalled()20})21test('If the resource not exists, creates one', () => {22 findPlugin.mockReturnValue({ name: 'voidplugin', conf: {} })23 expect(getResource('test')).toEqual({24 url: 'test',25 plugin: {26 name: 'voidplugin',27 conf: {}28 },29 value: undefined,30 callbacks: {}31 })32})33test('sets the resource in resources under url', () => {34 findPlugin.mockReturnValue({ name: 'voidplugin', conf: {} })35 expect(getResource('testtest')).toEqual(resources.testtest)36})37test('If the plugin has threshold, the resource has `last`', () => {38 findPlugin.mockReturnValue({ conf: { threshold: 100 } })39 expect(getResource('test').last).toBeTruthy()40})41test('If the plugin has checkInterval, the resource has `intervals`', () => {42 findPlugin.mockReturnValue({ conf: { checkInterval: 100 } })43 expect(getResource('test').intervals).toEqual({})44})45test('If the plugin has getResource, is called', () => {46 const plugin = {47 conf: {},48 getResource: jest.fn()49 }50 findPlugin.mockReturnValue(plugin)51 getResource('test')52 expect(plugin.getResource).toHaveBeenCalled()53})54test('the plugin`s getResource can modify the resource', () => {55 findPlugin.mockReturnValue({56 conf: {},57 getResource (resource) {58 resource.modifiedByMe = true59 }60 })61 expect(getResource('test').modifiedByMe).toBe(true)...

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index.test.js

Source: index.test.js Github

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...25 const render = template(config.tagFormat);26 t.is(render({ version }), version);27});28test('config uses commit analyser with peakfijn preset', t => {29 const plugin = findPlugin('@semantic-release/​commit-analyzer');30 t.is(plugin.preset, 'peakfijn');31 t.is(plugin.releaseRules, 'release-rules-peakfijn');32});33test('config uses release note generator with peakfijn preset', t => {34 const plugin = findPlugin('@semantic-release/​release-notes-generator');35 t.is(plugin.preset, 'peakfijn');36});37test('config uses changelog plugin', t => {38 t.truthy(findPlugin('@semantic-release/​changelog'));39});40test('config uses npm plugin', t => {41 t.truthy(findPlugin('@semantic-release/​npm'));42});43test('config uses git plugin with predefined message and assets', t => {44 const plugin = findPlugin('@semantic-release/​git');45 const assets = [46 'CHANGELOG.md',47 'package.json',48 'package-lock.json',49 ];50 /​/​ eslint-disable-next-line no-template-curly-in-string51 t.is(plugin.message, 'release: create new version ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}');52 t.true(isEqual(plugin.assets, assets));53});54test('config uses github plugin', t => {55 t.truthy(findPlugin('@semantic-release/​github'));56});57test('binary defers call to semantic release', async t => {58 const { stdout: help } = await execa(59 pkg.bin['semantic-release'],60 ['--help'],61 { cwd: __dirname },62 );63 t.true(help.includes('Run automated package publishing'));...

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command.js

Source: command.js Github

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1import { command } from '../​command'2import { resources } from '../​conf'3import { findPlugin } from '../​../​private/​findPlugin'4jest.mock('../​../​private/​findPlugin')5jest.spyOn(console, 'warn').mockImplementation()6describe('command', () => {7 beforeEach(() => {8 Object.keys(resources).forEach(key => delete resources[key])9 findPlugin.mockReturnValue({})10 })11 it('calls findPlugin if there is no resource for the url', () => {12 command('some url')13 expect(findPlugin).toHaveBeenCalledWith('some url')14 })15 it('not call findPlugin if there is resource for the url', () => {16 resources.someUrl = { plugin: {} }17 command('someUrl')18 expect(findPlugin).not.toHaveBeenCalled()19 })20 it('warns if the plugin does not accept commands', () => {21 command('some url')22 expect(console.warn).toHaveBeenCalledWith('the plugin does not accept commands')23 })24 it('warns if the plugin accept commands but not this', () => {25 findPlugin.mockReturnValue({26 commands: {}27 })28 command('some url', 'someCommand')29 expect(console.warn).toHaveBeenCalledWith('command not found')30 })31 it('calls the plugin command', () => {32 const someCommand = jest.fn()33 findPlugin.mockReturnValue({34 commands: { someCommand }35 })36 command('some url', 'someCommand', 'parameter', 1, 2, 3)37 expect(someCommand).toHaveBeenCalledWith('some url', 'parameter', 1, 2, 3)38 })39 it('returns the returned value of the plugin command', () => {40 const someCommand = jest.fn().mockReturnValue('OK')41 findPlugin.mockReturnValue({42 commands: { someCommand }43 })44 expect(command('some url', 'someCommand')).toBe('OK')45 })...

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get.js

Source: get.js Github

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1import { get } from '../​get'2import { findPlugin } from '../​../​private/​findPlugin'3import { resources } from '../​conf'4jest.mock('../​../​private/​findPlugin')5beforeEach(() => Object.keys(resources).forEach(key => delete resources[key]))6describe('get', () => {7 it('returns the cached value, if exists', () => {8 resources.someUrl = {9 value: 'value'10 }11 expect(get('someUrl')).toBe('value')12 })13 it('calls findPlugin, if there is no cached value', () => {14 findPlugin.mockReturnValue({})15 get('someUrl')16 expect(findPlugin).toHaveBeenCalledWith('someUrl')17 })18 it('returns undefined if there is no plugin', () => {19 findPlugin.mockReturnValue({})20 expect(get('someUrl')).toBeUndefined()21 })22 it('returns the value returned by the plugin', () => {23 const getPlugin = jest.fn(() => 'returnedValue')24 findPlugin.mockImplementation(() => {25 return {26 get: getPlugin27 }28 })29 expect(get('someUrl')).toBe('returnedValue')30 expect(getPlugin).toHaveBeenCalledWith('someUrl')31 })...

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Since Jest tests are runtime tests, they only have access to runtime information. You're trying to use a type, which is compile-time information. TypeScript should already be doing the type aspect of this for you. (More on that in a moment.)

The fact the tests only have access to runtime information has a couple of ramifications:

  • If it's valid for getAll to return an empty array (because there aren't any entities to get), the test cannot tell you whether the array would have had Entity elements in it if it hadn't been empty. All it can tell you is it got an array.

  • In the non-empty case, you have to check every element of the array to see if it's an Entity. You've said Entity is a class, not just a type, so that's possible. I'm not a user of Jest (I should be), but it doesn't seem to have a test specifically for this; it does have toBeTruthy, though, and we can use every to tell us if every element is an Entity:

    it('should return an array of Entity class', async () => {
         const all = await service.getAll()
         expect(all.every(e => e instanceof Entity)).toBeTruthy();
    });
    

    Beware, though, that all calls to every on an empty array return true, so again, that empty array issue raises its head.

If your Jest tests are written in TypeScript, you can improve on that by ensuring TypeScript tests the compile-time type of getAll's return value:

it('should return an array of Entity class', async () => {
    const all: Entity[] = await service.getAll()
    //       ^^^^^^^^^^
    expect(all.every(e => e instanceof Entity)).toBeTruthy();
});

TypeScript will complain about that assignment at compile time if it's not valid, and Jest will complain at runtime if it sees an array containing a non-Entity object.


But jonrsharpe has a good point: This test may not be useful vs. testing for specific values that should be there.

https://stackoverflow.com/questions/71717652/how-to-test-if-a-method-returns-an-array-of-a-class-in-jest

Blogs

Check out the latest blogs from LambdaTest on this topic:

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Having a strategy or plan can be the key to unlocking many successes, this is true to most contexts in life whether that be sport, business, education, and much more. The same is true for any company or organisation that delivers software/application solutions to their end users/customers. If you narrow that down even further from Engineering to Agile and then even to Testing or Quality Engineering, then strategy and planning is key at every level.

Jest Testing Tutorial

LambdaTest’s Jest Testing Tutorial covers step-by-step guides around Jest with code examples to help you be proficient with the Jest framework. The Jest tutorial has chapters to help you learn right from the basics of Jest framework to code-based tutorials around testing react apps with Jest, perform snapshot testing, import ES modules and more.

Chapters

  1. What is Jest Framework
  2. Advantages of Jest - Jest has 3,898,000 GitHub repositories, as mentioned on its official website. Learn what makes Jest special and why Jest has gained popularity among the testing and developer community.
  3. Jest Installation - All the prerequisites and set up steps needed to help you start Jest automation testing.
  4. Using Jest with NodeJS Project - Learn how to leverage Jest framework to automate testing using a NodeJS Project.
  5. Writing First Test for Jest Framework - Get started with code-based tutorial to help you write and execute your first Jest framework testing script.
  6. Jest Vocabulary - Learn the industry renowned and official jargons of the Jest framework by digging deep into the Jest vocabulary.
  7. Unit Testing with Jest - Step-by-step tutorial to help you execute unit testing with Jest framework.
  8. Jest Basics - Learn about the most pivotal and basic features which makes Jest special.
  9. Jest Parameterized Tests - Avoid code duplication and fasten automation testing with Jest using parameterized tests. Parameterization allows you to trigger the same test scenario over different test configurations by incorporating parameters.
  10. Jest Matchers - Enforce assertions better with the help of matchers. Matchers help you compare the actual output with the expected one. Here is an example to see if the object is acquired from the correct class or not. -

|<p>it('check_object_of_Car', () => {</p><p> expect(newCar()).toBeInstanceOf(Car);</p><p> });</p>| | :- |

  1. Jest Hooks: Setup and Teardown - Learn how to set up conditions which needs to be followed by the test execution and incorporate a tear down function to free resources after the execution is complete.
  2. Jest Code Coverage - Unsure there is no code left unchecked in your application. Jest gives a specific flag called --coverage to help you generate code coverage.
  3. HTML Report Generation - Learn how to create a comprehensive HTML report based on your Jest test execution.
  4. Testing React app using Jest Framework - Learn how to test your react web-application with Jest framework in this detailed Jest tutorial.
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  6. Snapshot Testing for React Front Ends - Capture screenshots of your react based web-application and compare them automatically for visual anomalies with the help of Jest tutorial.
  7. Bonus: Import ES modules with Jest - ES modules are also known as ECMAScript modules. Learn how to best use them by importing in your Jest testing scripts.
  8. Jest vs Mocha vs Jasmine - Learn the key differences between the most popular JavaScript-based testing frameworks i.e. Jest, Mocha, and Jasmine.
  9. Jest FAQs(Frequently Asked Questions) - Explore the most commonly asked questions around Jest framework, with their answers.

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