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typescript.mocks.ts
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153 lines (127 loc) · 5.77 KB
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import * as path from 'path';
import * as fs from 'fs';
import * as ts from 'typescript';
export interface Directory { [name: string]: (Directory | string); }
export class Host implements ts.LanguageServiceHost {
constructor(private directory: Directory, private scripts: string[]) {}
getCompilationSettings(): ts.CompilerOptions {
return {
experimentalDecorators: true,
module: ts.ModuleKind.CommonJS,
target: ts.ScriptTarget.ES5
};
}
getScriptFileNames(): string[] { return this.scripts; }
getScriptVersion(fileName: string): string { return "1"; }
getScriptSnapshot(fileName: string): ts.IScriptSnapshot {
let content = this.getFileContent(fileName);
if (content) return ts.ScriptSnapshot.fromString(content);
}
getCurrentDirectory(): string { return '/'; }
getDefaultLibFileName(options: ts.CompilerOptions): string { return 'lib.d.ts'; }
private getFileContent(fileName: string): string {
const names = fileName.split(path.sep);
if (names[names.length - 1] === 'lib.d.ts') {
return fs.readFileSync(ts.getDefaultLibFilePath(this.getCompilationSettings()), 'utf8');
}
let current: Directory | string = this.directory;
if (names.length && names[0] === '') names.shift();
for (const name of names) {
if (!current || typeof current === 'string') return undefined;
current = current[name];
}
if (typeof current === 'string') return current;
}
}
export class MockNode implements ts.Node {
constructor(public kind: ts.SyntaxKind = ts.SyntaxKind.Identifier, public flags: ts.NodeFlags = 0,
public pos: number = 0, public end: number = 0) {}
getSourceFile(): ts.SourceFile { return null; }
getChildCount(sourceFile?: ts.SourceFile): number { return 0 }
getChildAt(index: number, sourceFile?: ts.SourceFile): ts.Node { return null; }
getChildren(sourceFile?: ts.SourceFile): ts.Node[] { return []; }
getStart(sourceFile?: ts.SourceFile): number { return 0; }
getFullStart(): number { return 0; }
getEnd(): number { return 0; }
getWidth(sourceFile?: ts.SourceFile): number { return 0; }
getFullWidth(): number { return 0; }
getLeadingTriviaWidth(sourceFile?: ts.SourceFile): number { return 0; }
getFullText(sourceFile?: ts.SourceFile): string { return ''; }
getText(sourceFile?: ts.SourceFile): string { return ''; }
getFirstToken(sourceFile?: ts.SourceFile): ts.Node { return null; }
getLastToken(sourceFile?: ts.SourceFile): ts.Node { return null; }
}
export class MockIdentifier extends MockNode implements ts.Identifier {
public text: string;
public _primaryExpressionBrand: any;
public _memberExpressionBrand: any;
public _leftHandSideExpressionBrand: any;
public _incrementExpressionBrand: any;
public _unaryExpressionBrand: any;
public _expressionBrand: any;
constructor(public name: string, kind: ts.SyntaxKind = ts.SyntaxKind.Identifier,
flags: ts.NodeFlags = 0, pos: number = 0, end: number = 0) {
super(kind, flags, pos, end);
this.text = name;
}
}
export class MockVariableDeclaration extends MockNode implements ts.VariableDeclaration {
public _declarationBrand: any;
constructor(public name: ts.Identifier, kind: ts.SyntaxKind = ts.SyntaxKind.VariableDeclaration,
flags: ts.NodeFlags = 0, pos: number = 0, end: number = 0) {
super(kind, flags, pos, end);
}
static of(name: string): MockVariableDeclaration {
return new MockVariableDeclaration(new MockIdentifier(name));
}
}
export class MockSymbol implements ts.Symbol {
constructor(public name: string, private node: ts.Declaration = MockVariableDeclaration.of(name),
public flags: ts.SymbolFlags = 0) {}
getFlags(): ts.SymbolFlags { return this.flags; }
getName(): string { return this.name; }
getDeclarations(): ts.Declaration[] { return [this.node]; }
getDocumentationComment(): ts.SymbolDisplayPart[] { return []; }
static of(name: string): MockSymbol { return new MockSymbol(name); }
}
export function expectNoDiagnostics(diagnostics: ts.Diagnostic[]) {
for (const diagnostic of diagnostics) {
let message = ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
let {line, character} = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
console.log(`${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message}`);
}
expect(diagnostics.length).toBe(0);
}
export function expectValidSources(service: ts.LanguageService, program: ts.Program) {
expectNoDiagnostics(service.getCompilerOptionsDiagnostics());
for (const sourceFile of program.getSourceFiles()) {
expectNoDiagnostics(service.getSyntacticDiagnostics(sourceFile.fileName));
expectNoDiagnostics(service.getSemanticDiagnostics(sourceFile.fileName));
}
}
export function allChildren<T>(node: ts.Node, cb: (node: ts.Node) => T) {
return ts.forEachChild(node, child => {
const result = cb(node);
if (result) {
return result;
}
return allChildren(child, cb);
})
}
export function findClass(sourceFile: ts.SourceFile, name: string): ts.ClassDeclaration {
return ts.forEachChild(sourceFile,
node => isClass(node) && isNamed(node.name, name) ? node : undefined);
}
export function findVar(sourceFile: ts.SourceFile, name: string): ts.VariableDeclaration {
return allChildren(sourceFile,
node => isVar(node) && isNamed(node.name, name) ? node : undefined);
}
export function isClass(node: ts.Node): node is ts.ClassDeclaration {
return node.kind === ts.SyntaxKind.ClassDeclaration;
}
export function isNamed(node: ts.Node, name: string): node is ts.Identifier {
return node.kind === ts.SyntaxKind.Identifier && (<ts.Identifier>node).text === name;
}
export function isVar(node: ts.Node): node is ts.VariableDeclaration {
return node.kind === ts.SyntaxKind.VariableDeclaration;
}