angular-cn/tools/transpiler/unittest/transpilertests.js

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var compiler = require('../index');
var temp = require('temp');
var fs = require('fs');
temp.track();
var DEFAULT_OPTIONS = {
sourceMaps: false,
annotations: true, // parse annotations
types: true, // parse types
script: false, // parse as a module
memberVariables: true // parse class fields
};
describe('transpile to es6', function() {
var options;
beforeEach(function() {
options = merge(DEFAULT_OPTIONS, {outputLanguage: 'es6', typeAssertions: 'true'});
});
it('should preserve generic type information', function() {
var result = compiler.compile(options, "test.js",
"function f(a:List<string>){}");
expect(result.js).toBe('function f(a) {\n'+
' assert.argumentTypes(a, assert.genericType(List, assert.type.string));\n'+
'}\n'+
'Object.defineProperty(f, "parameters", {get: function() {\n'+
' return [[assert.genericType(List, assert.type.string)]];\n'+
' }});\n');
});
it('should allow super() calls when transpiling to ES6 with source maps', function() {
options = merge(options, {sourceMaps: true});
var result = compiler.compile(options, "test.js",
"class Base {}\n" +
"class Test extends Base {" +
" constructor() { super(); }" +
"}");
expect(result.js).toBe("class Base {}\n" +
"class Test extends Base {\n" +
" constructor() {\n"+
" super();\n"+
" }\n"+
"}\n"+
"//# sourceMappingURL=test.js.map\n");
});
it('should convert types to expressions', function() {
var result = compiler.compile(options, "test.js",
"function f(a:string) {}");
expect(result.js).toBe('function f(a) {\n'+
' assert.argumentTypes(a, assert.type.string);\n'+
'}\n' +
'Object.defineProperty(f, "parameters", {get: function() {\n' +
' return [[assert.type.string]];\n' +
' }});\n');
});
it('should not convert type properties to getter/setters', function() {
var result = compiler.compile(options, "test.js",
"class Test {" +
" constructor() { this.a = 1; }" +
"}");
expect(result.js).toBe("class Test {\n" +
" constructor() {\n"+
" this.a = 1;\n"+
" }\n"+
"}\n");
});
it('should remove class field declarations', function() {
var result = compiler.compile(options, "test.js",
"class Test {" +
" a:number = 1;" +
"}");
expect(result.js).toBe("class Test {}\n");
});
it('should convert types to expressions on "assert" module', function() {
var result = compiler.compile(options, "test.js",
"function f(a:string, b) { return a+b; }");
expect(result.js).toBe('function f(a, b) {\n'+
' assert.argumentTypes(a, assert.type.string, b, assert.type.any);\n'+
' return a + b;\n'+
'}\n'+
'Object.defineProperty(f, "parameters", {get: function() {\n'+
' return [[assert.type.string], []];\n'+
' }});\n');
});
});
describe('transpile to cjs', function() {
var options;
beforeEach(function() {
options = merge(DEFAULT_OPTIONS, {modules: 'commonjs'});
});
function compileAndWrite(input) {
var transpiledCode = compiler.compile(options, "test.js", input).js;
var tempFile = temp.openSync('ng2transpiler');
fs.writeSync(tempFile.fd, transpiledCode);
return tempFile.path;
}
it('should transpile export *', function() {
var file1 = compileAndWrite('export var a = 1');
var file2 = compileAndWrite('export * from "' + file1 + '"');
expect(require(file2).a).toBe(1);
});
it('should transpile export {name}', function() {
var file1 = compileAndWrite('export var a = 1');
var file2 = compileAndWrite('export {a} from "' + file1 + '"');
expect(require(file2).a).toBe(1);
});
});
function merge(a, b) {
var result = {};
for (var prop in a) {
result[prop] = a[prop];
}
for (var prop in b) {
result[prop] = b[prop];
}
return result;
}