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moduleResolution.ts
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/// <reference path="..\..\..\src\harness\external\mocha.d.ts" />
/// <reference path='..\..\..\src\harness\harness.ts' />
declare namespace chai.assert {
function deepEqual(actual: any, expected: any): void;
}
module ts {
interface File {
name: string
content?: string
}
function createModuleResolutionHost(...files: File[]): ModuleResolutionHost {
let map = arrayToMap(files, f => f.name);
return { fileExists, readFile };
function fileExists(path: string): boolean {
return hasProperty(map, path);
}
function readFile(path: string): string {
return hasProperty(map, path) ? map[path].content : undefined;
}
}
function splitPath(path: string): { dir: string; rel: string } {
let index = path.indexOf(directorySeparator);
return index === -1
? { dir: path, rel: undefined }
: { dir: path.substr(0, index), rel: path.substr(index + 1) };
}
const supportedJsExtensions = supportedTypeScriptExtensions.concat("js", "jsx");
describe("Node module resolution - relative paths", () => {
function testLoadAsFile(containingFileName: string, moduleFileNameNoExt: string, moduleName: string): void {
for (let ext of supportedTypeScriptExtensions) {
let containingFile = { name: containingFileName }
let moduleFile = { name: moduleFileNameNoExt + "." + ext }
let resolution = nodeModuleNameResolver(moduleName, containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
let failedLookupLocations: string[] = [];
let dir = getDirectoryPath(containingFileName);
for (let e of supportedTypeScriptExtensions) {
if (e === ext) {
break;
}
else {
failedLookupLocations.push(normalizePath(getRootLength(moduleName) === 0 ? combinePaths(dir, moduleName) : moduleName) + "." + e);
}
}
assert.deepEqual(resolution.failedLookupLocations, failedLookupLocations);
}
}
it("module name that starts with './' resolved as relative file name", () => {
testLoadAsFile("/foo/bar/baz.ts", "/foo/bar/foo", "./foo");
});
it("module name that starts with '../' resolved as relative file name", () => {
testLoadAsFile("/foo/bar/baz.ts", "/foo/foo", "../foo");
});
it("module name that starts with '/' script extension resolved as relative file name", () => {
testLoadAsFile("/foo/bar/baz.ts", "/foo", "/foo");
});
it("module name that starts with 'c:/' script extension resolved as relative file name", () => {
testLoadAsFile("c:/foo/bar/baz.ts", "c:/foo", "c:/foo");
});
function testLoadingFromPackageJson(containingFileName: string, packageJsonFileName: string, fieldRef: string, moduleFileName: string, moduleName: string): void {
let containingFile = { name: containingFileName };
let packageJson = { name: packageJsonFileName, content: JSON.stringify({ "typings": fieldRef }) };
let moduleFile = { name: moduleFileName };
let resolution = nodeModuleNameResolver(moduleName, containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, packageJson, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
// expect three failed lookup location - attempt to load module as file with all supported extensions
assert.equal(resolution.failedLookupLocations.length, supportedTypeScriptExtensions.length);
}
it("module name as directory - load from typings", () => {
testLoadingFromPackageJson("/a/b/c/d.ts", "/a/b/c/bar/package.json", "c/d/e.d.ts", "/a/b/c/bar/c/d/e.d.ts", "./bar");
testLoadingFromPackageJson("/a/b/c/d.ts", "/a/bar/package.json", "e.d.ts", "/a/bar/e.d.ts", "../../bar");
testLoadingFromPackageJson("/a/b/c/d.ts", "/bar/package.json", "e.d.ts", "/bar/e.d.ts", "/bar");
testLoadingFromPackageJson("c:/a/b/c/d.ts", "c:/bar/package.json", "e.d.ts", "c:/bar/e.d.ts", "c:/bar");
});
it ("module name as directory - load index.d.ts", () => {
let containingFile = {name: "/a/b/c.ts"};
let packageJson = {name: "/a/b/foo/package.json", content: JSON.stringify({main: "/c/d"})};
let indexFile = { name: "/a/b/foo/index.d.ts" };
let resolution = nodeModuleNameResolver("./foo", containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, packageJson, indexFile));
assert.equal(resolution.resolvedModule.resolvedFileName, indexFile.name);
assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/b/foo.ts",
"/a/b/foo.tsx",
"/a/b/foo.d.ts",
"/a/b/foo/index.ts",
"/a/b/foo/index.tsx",
]);
});
it("module name as directory (with js and jsx) - load index.d.ts", () => {
let containingFile = { name: "/a/b/c.ts" };
let packageJson = { name: "/a/b/foo/package.json", content: JSON.stringify({ main: "/c/d" }) };
let indexFile = { name: "/a/b/foo/index.d.ts" };
let resolution = nodeModuleNameResolver("./foo", containingFile.name, supportedJsExtensions, createModuleResolutionHost(containingFile, packageJson, indexFile));
assert.equal(resolution.resolvedModule.resolvedFileName, indexFile.name);
assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/b/foo.ts",
"/a/b/foo.tsx",
"/a/b/foo.d.ts",
"/a/b/foo.js",
"/a/b/foo.jsx",
"/a/b/foo/index.ts",
"/a/b/foo/index.tsx",
]);
});
});
describe("Node module resolution - non-relative paths", () => {
it("load module as file - ts files not loaded", () => {
let containingFile = { name: "/a/b/c/d/e.ts" };
let moduleFile = { name: "/a/b/node_modules/foo.ts" };
let resolution = nodeModuleNameResolver("foo", containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/b/c/d/node_modules/foo.ts",
"/a/b/c/d/node_modules/foo.tsx",
"/a/b/c/d/node_modules/foo.d.ts",
"/a/b/c/d/node_modules/foo/package.json",
"/a/b/c/d/node_modules/foo/index.ts",
"/a/b/c/d/node_modules/foo/index.tsx",
"/a/b/c/d/node_modules/foo/index.d.ts",
"/a/b/c/node_modules/foo.ts",
"/a/b/c/node_modules/foo.tsx",
"/a/b/c/node_modules/foo.d.ts",
"/a/b/c/node_modules/foo/package.json",
"/a/b/c/node_modules/foo/index.ts",
"/a/b/c/node_modules/foo/index.tsx",
"/a/b/c/node_modules/foo/index.d.ts"
])
});
it("load module as file (with js and jsx) - ts files not loaded", () => {
let containingFile = { name: "/a/b/c/d/e.ts" };
let moduleFile = { name: "/a/b/node_modules/foo.ts" };
let resolution = nodeModuleNameResolver("foo", containingFile.name, supportedJsExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/b/c/d/node_modules/foo.ts",
"/a/b/c/d/node_modules/foo.tsx",
"/a/b/c/d/node_modules/foo.d.ts",
"/a/b/c/d/node_modules/foo.js",
"/a/b/c/d/node_modules/foo.jsx",
"/a/b/c/d/node_modules/foo/package.json",
"/a/b/c/d/node_modules/foo/index.ts",
"/a/b/c/d/node_modules/foo/index.tsx",
"/a/b/c/d/node_modules/foo/index.d.ts",
"/a/b/c/d/node_modules/foo/index.js",
"/a/b/c/d/node_modules/foo/index.jsx",
"/a/b/c/node_modules/foo.ts",
"/a/b/c/node_modules/foo.tsx",
"/a/b/c/node_modules/foo.d.ts",
"/a/b/c/node_modules/foo.js",
"/a/b/c/node_modules/foo.jsx",
"/a/b/c/node_modules/foo/package.json",
"/a/b/c/node_modules/foo/index.ts",
"/a/b/c/node_modules/foo/index.tsx",
"/a/b/c/node_modules/foo/index.d.ts",
"/a/b/c/node_modules/foo/index.js",
"/a/b/c/node_modules/foo/index.jsx"
])
});
it("load module as file", () => {
let containingFile = { name: "/a/b/c/d/e.ts" };
let moduleFile = { name: "/a/b/node_modules/foo.d.ts" };
let resolution = nodeModuleNameResolver("foo", containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.equal(resolution.resolvedModule.isExternalLibraryImport, true);
});
it("load module as directory", () => {
let containingFile = { name: "/a/node_modules/b/c/node_modules/d/e.ts" };
let moduleFile = { name: "/a/node_modules/foo/index.d.ts" };
let resolution = nodeModuleNameResolver("foo", containingFile.name, supportedTypeScriptExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.equal(resolution.resolvedModule.isExternalLibraryImport, true);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/node_modules/b/c/node_modules/d/node_modules/foo.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.tsx",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.d.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/package.json",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.tsx",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.d.ts",
"/a/node_modules/b/c/node_modules/foo.ts",
"/a/node_modules/b/c/node_modules/foo.tsx",
"/a/node_modules/b/c/node_modules/foo.d.ts",
"/a/node_modules/b/c/node_modules/foo/package.json",
"/a/node_modules/b/c/node_modules/foo/index.ts",
"/a/node_modules/b/c/node_modules/foo/index.tsx",
"/a/node_modules/b/c/node_modules/foo/index.d.ts",
"/a/node_modules/b/node_modules/foo.ts",
"/a/node_modules/b/node_modules/foo.tsx",
"/a/node_modules/b/node_modules/foo.d.ts",
"/a/node_modules/b/node_modules/foo/package.json",
"/a/node_modules/b/node_modules/foo/index.ts",
"/a/node_modules/b/node_modules/foo/index.tsx",
"/a/node_modules/b/node_modules/foo/index.d.ts",
"/a/node_modules/foo.ts",
"/a/node_modules/foo.tsx",
"/a/node_modules/foo.d.ts",
"/a/node_modules/foo/package.json",
"/a/node_modules/foo/index.ts",
"/a/node_modules/foo/index.tsx"
]);
});
it("load module as directory (with js and jsx)", () => {
let containingFile = { name: "/a/node_modules/b/c/node_modules/d/e.ts" };
let moduleFile = { name: "/a/node_modules/foo/index.d.ts" };
let resolution = nodeModuleNameResolver("foo", containingFile.name, supportedJsExtensions, createModuleResolutionHost(containingFile, moduleFile));
assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
assert.equal(resolution.resolvedModule.isExternalLibraryImport, true);
assert.deepEqual(resolution.failedLookupLocations, [
"/a/node_modules/b/c/node_modules/d/node_modules/foo.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.tsx",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.d.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.js",
"/a/node_modules/b/c/node_modules/d/node_modules/foo.jsx",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/package.json",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.tsx",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.d.ts",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.js",
"/a/node_modules/b/c/node_modules/d/node_modules/foo/index.jsx",
"/a/node_modules/b/c/node_modules/foo.ts",
"/a/node_modules/b/c/node_modules/foo.tsx",
"/a/node_modules/b/c/node_modules/foo.d.ts",
"/a/node_modules/b/c/node_modules/foo.js",
"/a/node_modules/b/c/node_modules/foo.jsx",
"/a/node_modules/b/c/node_modules/foo/package.json",
"/a/node_modules/b/c/node_modules/foo/index.ts",
"/a/node_modules/b/c/node_modules/foo/index.tsx",
"/a/node_modules/b/c/node_modules/foo/index.d.ts",
"/a/node_modules/b/c/node_modules/foo/index.js",
"/a/node_modules/b/c/node_modules/foo/index.jsx",
"/a/node_modules/b/node_modules/foo.ts",
"/a/node_modules/b/node_modules/foo.tsx",
"/a/node_modules/b/node_modules/foo.d.ts",
"/a/node_modules/b/node_modules/foo.js",
"/a/node_modules/b/node_modules/foo.jsx",
"/a/node_modules/b/node_modules/foo/package.json",
"/a/node_modules/b/node_modules/foo/index.ts",
"/a/node_modules/b/node_modules/foo/index.tsx",
"/a/node_modules/b/node_modules/foo/index.d.ts",
"/a/node_modules/b/node_modules/foo/index.js",
"/a/node_modules/b/node_modules/foo/index.jsx",
"/a/node_modules/foo.ts",
"/a/node_modules/foo.tsx",
"/a/node_modules/foo.d.ts",
"/a/node_modules/foo.js",
"/a/node_modules/foo.jsx",
"/a/node_modules/foo/package.json",
"/a/node_modules/foo/index.ts",
"/a/node_modules/foo/index.tsx"
]);
});
});
describe("Module resolution - relative imports", () => {
it("should find all modules", () => {
const options: CompilerOptions = { module: ModuleKind.CommonJS };
const files: Map<string> = {
"/a/b/c/first/shared.ts": `
class A {}
export = A`,
"/a/b/c/first/second/class_a.ts": `
import Shared = require('../shared');
import C = require('../../third/class_c');
class B {}
export = B;`,
"/a/b/c/third/class_c.ts":`
import Shared = require('../first/shared');
class C {}
export = C;
`
};
const currentDirectory = "/a/b/c/first/second";
const host: CompilerHost = {
getSourceFile: (fileName: string, languageVersion: ScriptTarget) => {
let path = normalizePath(combinePaths(currentDirectory, fileName));
return hasProperty(files, path) ? createSourceFile(fileName, files[path], languageVersion) : undefined;
},
getDefaultLibFileName: () => "lib.d.ts",
writeFile: (fileName, content): void => { throw new Error("NotImplemented"); },
getCurrentDirectory: () => currentDirectory,
getCanonicalFileName: fileName => fileName.toLowerCase(),
getNewLine: () => "\r\n",
useCaseSensitiveFileNames: () => false,
fileExists: fileName => {
let path = normalizePath(combinePaths(currentDirectory, fileName));
return hasProperty(files, path);
},
readFile: (fileName): string => { throw new Error("NotImplemented"); }
};
const program = createProgram(["class_a.ts"], options, host);
assert.equal(program.getSourceFiles().length, 3);
const syntacticDiagnostics = program.getSyntacticDiagnostics();
assert.equal(syntacticDiagnostics.length, 0, `expect no syntactic diagnostics, got: ${JSON.stringify(syntacticDiagnostics.map(diagnosticToString))}`);
const semanticDiagnostics = program.getSemanticDiagnostics();
assert.equal(semanticDiagnostics.length, 0, `expect no semantic diagnostics, got: ${JSON.stringify(semanticDiagnostics.map(diagnosticToString))}`);
// try to get file using a relative name
const fileC = program.getSourceFile("../../../c/third/class_c.ts");
assert.isTrue(fileC !== undefined, `expected to get file by relative name, got ${fileC}`);
});
function diagnosticToString(diagnostic: Diagnostic) {
let output = "";
if (diagnostic.file) {
let loc = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
output += `${ diagnostic.file.fileName }(${ loc.line + 1 },${ loc.character + 1 }): `;
}
let category = DiagnosticCategory[diagnostic.category].toLowerCase();
output += `${ category } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }${ sys.newLine }`;
return output;
}
});
}