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All Rights Reserved. * * Licensed 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, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import ts from 'typescript'; import {DEFAULT_ARRAY_RANGE, FIXED_ARRAY_COUNT} from '../../lib/constants'; import {defaultTypeToMock} from '../../lib/default-type-to-mock'; import {fake} from '../../lib/fake'; import {randomRange} from '../../lib/random-range'; import {smartProps} from '../../lib/smart-props'; import {stringify} from '../../lib/stringify'; /** * Intermock general options */ export interface Options { // Array of file tuples. (filename, data) files?: Array<[string, string]>; // TypeScript is currently the only supported language language?: SupportedLanguage; // Specific interfaces to write to output interfaces?: string[]; // Used for testing mode, isFixedMode?: boolean; // One of object|json|string. Strings have their object's functions // stringified. output?: OutputType; // Should optional properties always be enabled isOptionalAlwaysEnabled?: boolean; } type OutputType = 'object'|'json'|'string'; type SupportedLanguage = 'typescript'; interface JSDoc { comment: string; } interface NodeWithDocs extends ts.PropertySignature { jsDoc: JSDoc[]; } type TypeCacheRecord = { kind: ts.SyntaxKind, aliasedTo: ts.SyntaxKind }; type Output = Record<string, {}>; type Types = Record<string, {}>; /** * Generate fake data using faker for primitive types: string|number|boolean. * * @param property Output property to write to * @param syntaxType Type of primitive, such as boolean|number|string * @param options Intermock options object * @param mockType Optional specification of what Faker type to use */ function generatePrimitive( property: string, syntaxType: ts.SyntaxKind, options: Options, mockType?: string) { const smartMockType = smartProps[property]; const isFixedMode = options.isFixedMode ? options.isFixedMode : false; if (mockType) { return fake(mockType, options.isFixedMode); } else if (smartMockType) { return fake(smartMockType, options.isFixedMode); } else { return defaultTypeToMock[syntaxType](isFixedMode); } } /** * Determines if a property marked as optional will have fake data generated for * it. Invokes this using Math.random. * * @param questionToken * @param options Intermock general options object */ function isQuestionToken( questionToken: ts.Token<ts.SyntaxKind.QuestionToken>|undefined, options: Options) { if (questionToken) { if (options.isFixedMode && !options.isOptionalAlwaysEnabled) { return true; } else Iif (Math.random() < .5 && !options.isOptionalAlwaysEnabled) { return true; } } return false; } /** * Process an untyped interface property, defaults to generating a primitive. * * @param output The object outputted by Intermock after all types are mocked * @param property Output property to write to * @param kind TS data type of property type * @param mockType Specification of what Faker type to use * @param options Intermock general options object */ function processGenericPropertyType( output: Output, property: string, kind: ts.SyntaxKind, mockType: string, options: Options) { const mock = generatePrimitive(property, kind, options, mockType); output[property] = mock; } /** * Generate a function for a call signature of a property of an interface. Uses * the `new Function` constructor and stringifies any internal function * declarations/calls or returned complex types. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param property Output property to write to * @param sourceFile TypeScript AST object compiled from file data * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. */ function processFunctionPropertyType( node: ts.PropertySignature, output: Output, property: string, sourceFile: ts.SourceFile, options: Options, types: Record<string, {}>) { // TODO process args from parameters of function const args = ''; let body = ''; const funcNode = node.type as ts.FunctionTypeNode; const returnType = funcNode.type; switch (returnType.kind) { case ts.SyntaxKind.TypeReference: const tempBody: Record<string, {}> = {}; processPropertyTypeReference( node, tempBody, 'body', ((returnType as ts.TypeReferenceNode).typeName as ts.Identifier).text, returnType.kind, sourceFile, options, types); body = `return ${stringify(tempBody['body'])}`; break; default: body = `return ${ JSON.stringify(generatePrimitive('', returnType.kind, options))}`; break; } const func = new Function(args, body); output[property] = func; } /** * Process an individual interface property. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param property Output property to write to * @param typeName Type name of property * @param kind TS data type of property type * @param sourceFile TypeScript AST object compiled from file data * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. */ function processPropertyTypeReference( node: ts.PropertySignature, output: Output, property: string, typeName: string, kind: ts.SyntaxKind, sourceFile: ts.SourceFile, options: Options, types: Record<string, {}>) { let normalizedTypeName; if (typeName.startsWith('Array<')) { normalizedTypeName = typeName.replace('Array<', '').replace('>', ''); } else { normalizedTypeName = typeName; } if (normalizedTypeName !== typeName) { processArrayPropertyType( node, output, property, normalizedTypeName, kind, sourceFile, options, types); return; } switch ((types[normalizedTypeName] as TypeCacheRecord).kind) { case ts.SyntaxKind.EnumDeclaration: setEnum(sourceFile, output, typeName, property); break; default: if ((types[normalizedTypeName] as TypeCacheRecord).kind !== (types[normalizedTypeName] as TypeCacheRecord).aliasedTo) { const alias = (types[normalizedTypeName] as TypeCacheRecord).aliasedTo; const isPrimitiveType = alias === ts.SyntaxKind.StringKeyword || alias === ts.SyntaxKind.NumberKeyword || alias === ts.SyntaxKind.BooleanKeyword; Eif (isPrimitiveType) { output[property] = generatePrimitive(property, alias, options, ''); } else { // TODO } } else { output[property] = {}; processFile(sourceFile, output[property], options, types, typeName); break; } } } /** * Process JSDocs to determine if a different Faker type should be used to mock * the data of the interface. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param property Output property to write to * @param jsDocs JSDocs to process * @param options Intermock general options object */ function processJsDocs( node: ts.PropertySignature, output: Output, property: string, jsDocs: JSDoc[], options: Options) { // TODO handle case where we get multiple mock JSDocs or a JSDoc like // mockRange for an array. In essence, we are only dealing with // primitives now // TODO Handle error case where a complex type has MockDocs let mockType = ''; let jsDocComment = ''; Eif (jsDocs.length > 0 && jsDocs[0].comment) { jsDocComment = jsDocs[0].comment; } Eif (jsDocComment.startsWith('!mockType')) { const match = jsDocComment.match(/(?<=\{).+?(?=\})/g); Eif (match) { mockType = match[0]; } } else { // TODO } const mock = generatePrimitive(property, node.kind, options, mockType); output[property] = mock; } /** * Process an array definition. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param property Output property to write to * @param typeName Type name of property * @param kind TS data type of property type * @param sourceFile TypeScript AST object compiled from file data * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. */ function processArrayPropertyType( node: ts.PropertySignature, output: Output, property: string, typeName: string, kind: ts.SyntaxKind, sourceFile: ts.SourceFile, options: Options, types: Record<string, {}>) { typeName = typeName.replace('[', '').replace(']', ''); output[property] = []; if ((node.type as ts.ArrayTypeNode).elementType) { kind = (node.type as ts.ArrayTypeNode).elementType.kind; } const isPrimitiveType = kind === ts.SyntaxKind.StringKeyword || kind === ts.SyntaxKind.BooleanKeyword || kind === ts.SyntaxKind.NumberKeyword; const arrayRange = options.isFixedMode ? FIXED_ARRAY_COUNT : randomRange(DEFAULT_ARRAY_RANGE[0], DEFAULT_ARRAY_RANGE[1]); for (let i = 0; i < arrayRange; i++) { if (isPrimitiveType) { (output[property] as Array<{}>)[i] = generatePrimitive(property, kind, options, ''); } else { (output[property] as Array<{}>).push({}); processFile( sourceFile, (output[property] as Array<{}>)[i], options, types, typeName); } } } /** * Process each interface property. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param sourceFile TypeScript AST object compiled from file data * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. */ function traverseInterfaceMembers( node: ts.Node, output: Output, sourceFile: ts.SourceFile, options: Options, types: Record<string, {}>) { if (node.kind !== ts.SyntaxKind.PropertySignature) { return; } const processPropertySignature = (node: ts.PropertySignature) => { let jsDocs: JSDoc[] = []; if ((node as NodeWithDocs).jsDoc) { jsDocs = (node as NodeWithDocs).jsDoc; } const property = node.name.getText(); const questionToken = node.questionToken; let typeName = ''; let kind; if (isQuestionToken(questionToken, options)) { return; } if (jsDocs.length > 0) { processJsDocs(node, output, property, jsDocs, options); return; } Eif (node.type) { kind = node.type.kind; typeName = node.type.getText(); } switch (kind) { case ts.SyntaxKind.TypeReference: processPropertyTypeReference( node, output, property, typeName, kind as ts.SyntaxKind, sourceFile, options, types); break; case ts.SyntaxKind.ArrayType: processArrayPropertyType( node, output, property, typeName, kind as ts.SyntaxKind, sourceFile, options, types); break; case ts.SyntaxKind.FunctionType: processFunctionPropertyType( node, output, property, sourceFile, options, types); break; default: processGenericPropertyType( output, property, kind as ts.SyntaxKind, '', options); break; } }; processPropertySignature(node as ts.PropertySignature); } /** * Process an enum and set it. * * @param sourceFile TypeScript AST object compiled from file data * @param output The object outputted by Intermock after all types are mocked * @param typeName Type name of property * @param property Output property to write to */ function setEnum( sourceFile: ts.SourceFile, output: Output, typeName: string, property: string) { const processNode = (node: ts.Node) => { switch (node.kind) { case ts.SyntaxKind.EnumDeclaration: if ((node as ts.EnumDeclaration).name.text === typeName) { const members = (node as ts.EnumDeclaration).members; const selectedMemberIdx = Math.floor(members.length / 2); const selectedMember = members[selectedMemberIdx]; // TODO handle bitwise initializers if (selectedMember.initializer) { switch (selectedMember.initializer.kind) { case ts.SyntaxKind.NumericLiteral: output[property] = Number(selectedMember.initializer.getText()); break; case ts.SyntaxKind.StringLiteral: output[property] = selectedMember.initializer.getText().replace(/\'/g, ''); break; default: break; } } else { output[property] = selectedMemberIdx; } } break; default: break; } ts.forEachChild(node, processNode); }; processNode(sourceFile); } /** * Traverse each declared interface in a node. * * @param node Node being processed * @param output The object outputted by Intermock after all types are mocked * @param sourceFile TypeScript AST object compiled from file data * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. * @param propToTraverse Optional specific property to traverse through the * interface * @param path Optional specific path to write to on the output object */ function traverseInterface( node: ts.Node, output: Output, sourceFile: ts.SourceFile, options: Options, types: Types, propToTraverse?: string, path?: string) { if (path) { output[path] = {}; output = output[path]; } if (!propToTraverse && !path) { const newPath = (node as ts.InterfaceDeclaration).name.text; output[newPath] = {}; output = output[newPath]; } // TODO get range from JSDoc // TODO given a range of interfaces to generate, add to array. If 1 // then just return an object node.forEachChild( child => traverseInterfaceMembers(child, output, sourceFile, options, types)); } function isSpecificInterface(name: string, options: Options) { if (!options.interfaces) { return true; } if (options.interfaces.indexOf(name) === -1) { return false; } return true; } /** * Process an individual TS file given a TS AST object. * * @param sourceFile TypeScript AST object compiled from file data * @param output The object outputted by Intermock after all types are mocked * @param options Intermock general options object * @param types Top-level types of interfaces/aliases etc. * @param propToTraverse Optional specific property to traverse through the * interface */ function processFile( sourceFile: ts.SourceFile, output: Output, options: Options, types: Types, propToTraverse?: string) { const processNode = (node: ts.Node) => { switch (node.kind) { case ts.SyntaxKind.InterfaceDeclaration: /** * TODO: Handle interfaces that extend others, via checking hertiage * clauses */ const p = (node as ts.InterfaceDeclaration).name.text; if (!isSpecificInterface(p, options) && !propToTraverse) { return; } if (propToTraverse) { if (p === propToTraverse) { traverseInterface( node, output, sourceFile, options, types, propToTraverse); } } else { traverseInterface(node, output, sourceFile, options, types); } break; case ts.SyntaxKind.TypeAliasDeclaration: const type = (node as ts.TypeAliasDeclaration).type; const path = (node as ts.TypeAliasDeclaration).name.text; Iif (!isSpecificInterface(path, options)) { return; } if (propToTraverse) { if (path === propToTraverse) { traverseInterface( type, output, sourceFile, options, types, propToTraverse); } } else { traverseInterface( type, output, sourceFile, options, types, undefined, path); } break; default: break; } ts.forEachChild(node, processNode); }; processNode(sourceFile); } /** * Gathers all interfaces and types references ahead of time so that when * interface properties reference them then we can know their type. * * @param sourceFile TypeScript AST object compiled from file data */ function gatherTypes(sourceFile: ts.SourceFile) { const types: Types = {}; const processNode = (node: ts.Node) => { const name = (node as ts.DeclarationStatement).name; const text = name ? name.text : ''; let aliasedTo; if ((node as ts.TypeAliasDeclaration).type) { aliasedTo = (node as ts.TypeAliasDeclaration).type.kind; } else { aliasedTo = node.kind; } types[text] = {kind: node.kind, aliasedTo}; ts.forEachChild(node, processNode); }; processNode(sourceFile); return types; } /** * Fromat output based on the specified output type in the options object. * * @param output The object outputted by Intermock after all types are mocked * @param options Intermock general options object */ function formatOutput(output: Output, options: Options): string|Output { switch (options.output) { case 'json': return JSON.stringify(output); case 'string': return stringify(output); default: return output; } } /** * Intermock API. * * Given an options object, with a files array property, Intermock parses the * AST and generates mock objects with fake data. * * This is the only part of the API exposed to a caller (including the CLI). All * data is passed through the `files` property on the options object. * * @param options Intermock general options object */ export function mock(options: Options) { const output: Output = {}; const fileContents = options.files; let types: Types; Iif (!fileContents) { return {}; } fileContents.forEach((f) => { types = gatherTypes( ts.createSourceFile(f[0], f[1], ts.ScriptTarget.ES2015, true)); }); fileContents.forEach((f) => { processFile( ts.createSourceFile(f[0], f[1], ts.ScriptTarget.ES2015, true), output, options, types); }); return formatOutput(output, options); } |