angular-cn/packages/compiler-cli/src/ngcc/test/host/esm2015_host_spec.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import * as ts from 'typescript';
import {ClassMemberKind, Import} from '../../../ngtsc/host';
import {Fesm2015ReflectionHost} from '../../src/host/fesm2015_host';
import {getDeclaration, makeProgram} from '../helpers/utils';
const SOME_DIRECTIVE_FILE = {
name: '/some_directive.js',
contents: `
import { Directive, Inject, InjectionToken, Input, HostListener, HostBinding } from '@angular/core';
const INJECTED_TOKEN = new InjectionToken('injected');
const ViewContainerRef = {};
const TemplateRef = {};
class SomeDirective {
constructor(_viewContainer, _template, injected) {
this.instanceProperty = 'instance';
}
instanceMethod() {}
onClick() {}
@HostBinding('class.foo')
get isClassFoo() { return false; }
static staticMethod() {}
}
SomeDirective.staticProperty = 'static';
SomeDirective.decorators = [
{ type: Directive, args: [{ selector: '[someDirective]' },] }
];
SomeDirective.ctorParameters = () => [
{ type: ViewContainerRef, },
{ type: TemplateRef, },
{ type: undefined, decorators: [{ type: Inject, args: [INJECTED_TOKEN,] },] },
];
SomeDirective.propDecorators = {
"input1": [{ type: Input },],
"input2": [{ type: Input },],
"target": [{ type: HostBinding, args: ['attr.target',] }, { type: Input },],
"onClick": [{ type: HostListener, args: ['click',] },],
};
`,
};
const SIMPLE_CLASS_FILE = {
name: '/simple_class.js',
contents: `
class EmptyClass {}
class NoDecoratorConstructorClass {
constructor(foo) {}
}
`,
};
const FOO_FUNCTION_FILE = {
name: '/foo_function.js',
contents: `
import { Directive } from '@angular/core';
function foo() {}
foo.decorators = [
{ type: Directive, args: [{ selector: '[ignored]' },] }
];
`,
};
const INVALID_DECORATORS_FILE = {
name: '/invalid_decorators.js',
contents: `
const NotArrayLiteralDecorator = {};
class NotArrayLiteral {
}
NotArrayLiteral.decorators = () => [
{ type: NotArrayLiteralDecorator, args: [{ selector: '[ignored]' },] },
];
const NotObjectLiteralDecorator = {};
class NotObjectLiteral {
}
NotObjectLiteral.decorators = [
"This is not an object literal",
{ type: NotObjectLiteralDecorator },
];
const NoTypePropertyDecorator1 = {};
const NoTypePropertyDecorator2 = {};
class NoTypeProperty {
}
NoTypeProperty.decorators = [
{ notType: NoTypePropertyDecorator1 },
{ type: NoTypePropertyDecorator2 },
];
const NotIdentifierDecorator = {};
class NotIdentifier {
}
NotIdentifier.decorators = [
{ type: 'StringsLiteralsAreNotIdentifiers' },
{ type: NotIdentifierDecorator },
];
`,
};
const INVALID_DECORATOR_ARGS_FILE = {
name: '/invalid_decorator_args.js',
contents: `
const NoArgsPropertyDecorator = {};
class NoArgsProperty {
}
NoArgsProperty.decorators = [
{ type: NoArgsPropertyDecorator },
];
const NoPropertyAssignmentDecorator = {};
const args = [{ selector: '[ignored]' },];
class NoPropertyAssignment {
}
NoPropertyAssignment.decorators = [
{ type: NoPropertyAssignmentDecorator, args },
];
const NotArrayLiteralDecorator = {};
class NotArrayLiteral {
}
NotArrayLiteral.decorators = [
{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },
];
`,
};
const INVALID_PROP_DECORATORS_FILE = {
name: '/invalid_prop_decorators.js',
contents: `
const NotObjectLiteralDecorator = {};
class NotObjectLiteral {
}
NotObjectLiteral.propDecorators = () => ({
"prop": [{ type: NotObjectLiteralDecorator },]
});
const NotObjectLiteralPropDecorator = {};
class NotObjectLiteralProp {
}
NotObjectLiteralProp.propDecorators = {
"prop": [
"This is not an object literal",
{ type: NotObjectLiteralPropDecorator },
]
};
const NoTypePropertyDecorator1 = {};
const NoTypePropertyDecorator2 = {};
class NoTypeProperty {
}
NoTypeProperty.propDecorators = {
"prop": [
{ notType: NoTypePropertyDecorator1 },
{ type: NoTypePropertyDecorator2 },
]
};
const NotIdentifierDecorator = {};
class NotIdentifier {
}
NotIdentifier.propDecorators = {
"prop": [
{ type: 'StringsLiteralsAreNotIdentifiers' },
{ type: NotIdentifierDecorator },
]
};
`,
};
const INVALID_PROP_DECORATOR_ARGS_FILE = {
name: '/invalid_prop_decorator_args.js',
contents: `
const NoArgsPropertyDecorator = {};
class NoArgsProperty {
}
NoArgsProperty.propDecorators = {
"prop": [{ type: NoArgsPropertyDecorator },]
};
const NoPropertyAssignmentDecorator = {};
const args = [{ selector: '[ignored]' },];
class NoPropertyAssignment {
}
NoPropertyAssignment.propDecorators = {
"prop": [{ type: NoPropertyAssignmentDecorator, args },]
};
const NotArrayLiteralDecorator = {};
class NotArrayLiteral {
}
NotArrayLiteral.propDecorators = {
"prop": [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },],
};
`,
};
const INVALID_CTOR_DECORATORS_FILE = {
name: '/invalid_ctor_decorators.js',
contents: `
const NoParametersDecorator = {};
class NoParameters {
constructor() {
}
}
const NotArrowFunctionDecorator = {};
class NotArrowFunction {
constructor(arg1) {
}
}
NotArrowFunction.ctorParameters = function() {
return { type: 'ParamType', decorators: [{ type: NotArrowFunctionDecorator },] };
};
const NotArrayLiteralDecorator = {};
class NotArrayLiteral {
constructor(arg1) {
}
}
NotArrayLiteral.ctorParameters = () => 'StringsAreNotArrayLiterals';
const NotObjectLiteralDecorator = {};
class NotObjectLiteral {
constructor(arg1, arg2) {
}
}
NotObjectLiteral.ctorParameters = () => [
"This is not an object literal",
{ type: 'ParamType', decorators: [{ type: NotObjectLiteralDecorator },] },
];
const NoTypePropertyDecorator1 = {};
const NoTypePropertyDecorator2 = {};
class NoTypeProperty {
constructor(arg1, arg2) {
}
}
NoTypeProperty.ctorParameters = () => [
{
type: 'ParamType',
decorators: [
{ notType: NoTypePropertyDecorator1 },
{ type: NoTypePropertyDecorator2 },
]
},
];
const NotIdentifierDecorator = {};
class NotIdentifier {
constructor(arg1, arg2) {
}
}
NotIdentifier.ctorParameters = () => [
{
type: 'ParamType',
decorators: [
{ type: 'StringsLiteralsAreNotIdentifiers' },
{ type: NotIdentifierDecorator },
]
},
];
`,
};
const INVALID_CTOR_DECORATOR_ARGS_FILE = {
name: '/invalid_ctor_decorator_args.js',
contents: `
const NoArgsPropertyDecorator = {};
class NoArgsProperty {
constructor(arg1) {
}
}
NoArgsProperty.ctorParameters = () => [
{ type: 'ParamType', decorators: [{ type: NoArgsPropertyDecorator },] },
];
const NoPropertyAssignmentDecorator = {};
const args = [{ selector: '[ignored]' },];
class NoPropertyAssignment {
constructor(arg1) {
}
}
NoPropertyAssignment.ctorParameters = () => [
{ type: 'ParamType', decorators: [{ type: NoPropertyAssignmentDecorator, args },] },
];
const NotArrayLiteralDecorator = {};
class NotArrayLiteral {
constructor(arg1) {
}
}
NotArrayLiteral.ctorParameters = () => [
{ type: 'ParamType', decorators: [{ type: NotArrayLiteralDecorator, args: () => [{ selector: '[ignored]' },] },] },
];
`,
};
const IMPORTS_FILES = [
{
name: '/a.js',
contents: `
export const a = 'a';
`,
},
{
name: '/b.js',
contents: `
import {a} from './a.js';
import {a as foo} from './a.js';
const b = a;
const c = foo;
const d = b;
`,
},
];
const EXPORTS_FILES = [
{
name: '/a.js',
contents: `
export const a = 'a';
`,
},
{
name: '/b.js',
contents: `
import {Directive} from '@angular/core';
import {a} from './a';
import {a as foo} from './a';
export {Directive} from '@angular/core';
export {a} from './a';
export const b = a;
export const c = foo;
export const d = b;
export const e = 'e';
export const DirectiveX = Directive;
export class SomeClass {}
`,
},
];
const FUNCTION_BODY_FILE = {
name: '/function_body.js',
contents: `
function foo(x) {
return x;
}
function bar(x, y = 42) {
return x + y;
}
function baz(x) {
let y;
if (y === void 0) { y = 42; }
return x;
}
let y;
function qux(x) {
if (x === void 0) { y = 42; }
return y;
}
function moo() {
let x;
if (x === void 0) { x = 42; }
return x;
}
let x;
function juu() {
if (x === void 0) { x = 42; }
return x;
}
`
};
describe('Esm2015ReflectionHost', () => {
describe('getDecoratorsOfDeclaration()', () => {
it('should find the decorators on a class', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators).toBeDefined();
expect(decorators.length).toEqual(1);
const decorator = decorators[0];
expect(decorator.name).toEqual('Directive');
expect(decorator.import).toEqual({name: 'Directive', from: '@angular/core'});
expect(decorator.args !.map(arg => arg.getText())).toEqual([
'{ selector: \'[someDirective]\' }',
]);
});
it('should return null if the symbol is not a class', () => {
const program = makeProgram(FOO_FUNCTION_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const functionNode =
getDeclaration(program, FOO_FUNCTION_FILE.name, 'foo', ts.isFunctionDeclaration);
const decorators = host.getDecoratorsOfDeclaration(functionNode);
expect(decorators).toBe(null);
});
it('should return null if there are no decorators', () => {
const program = makeProgram(SIMPLE_CLASS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode);
expect(decorators).toBe(null);
});
it('should ignore `decorators` if it is not an array literal', () => {
const program = makeProgram(INVALID_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATORS_FILE.name, 'NotArrayLiteral', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode);
expect(decorators).toEqual([]);
});
it('should ignore decorator elements that are not object literals', () => {
const program = makeProgram(INVALID_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATORS_FILE.name, 'NotObjectLiteral', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotObjectLiteralDecorator'}));
});
it('should ignore decorator elements that have no `type` property', () => {
const program = makeProgram(INVALID_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATORS_FILE.name, 'NoTypeProperty', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
});
it('should ignore decorator elements whose `type` value is not an identifier', () => {
const program = makeProgram(INVALID_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATORS_FILE.name, 'NotIdentifier', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
});
it('should use `getImportOfIdentifier()` to retrieve import info', () => {
const mockImportInfo = {} as Import;
const spy = spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier')
.and.returnValue(mockImportInfo);
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toEqual(1);
expect(decorators[0].import).toBe(mockImportInfo);
const typeIdentifier = spy.calls.mostRecent().args[0] as ts.Identifier;
expect(typeIdentifier.text).toBe('Directive');
});
describe('(returned decorators `args`)', () => {
it('should be an empty array if decorator has no `args` property', () => {
const program = makeProgram(INVALID_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATOR_ARGS_FILE.name, 'NoArgsProperty', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if decorator\'s `args` has no property assignment', () => {
const program = makeProgram(INVALID_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if `args` property value is not an array literal', () => {
const program = makeProgram(INVALID_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral', ts.isClassDeclaration);
const decorators = host.getDecoratorsOfDeclaration(classNode) !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
expect(decorators[0].args).toEqual([]);
});
});
});
describe('getMembersOfClass()', () => {
it('should find decorated properties on a class', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const input1 = members.find(member => member.name === 'input1') !;
expect(input1.kind).toEqual(ClassMemberKind.Property);
expect(input1.isStatic).toEqual(false);
expect(input1.decorators !.map(d => d.name)).toEqual(['Input']);
const input2 = members.find(member => member.name === 'input2') !;
expect(input2.kind).toEqual(ClassMemberKind.Property);
expect(input2.isStatic).toEqual(false);
expect(input1.decorators !.map(d => d.name)).toEqual(['Input']);
});
it('should find non decorated properties on a class', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const instanceProperty = members.find(member => member.name === 'instanceProperty') !;
expect(instanceProperty.kind).toEqual(ClassMemberKind.Property);
expect(instanceProperty.isStatic).toEqual(false);
expect(ts.isBinaryExpression(instanceProperty.implementation !)).toEqual(true);
expect(instanceProperty.value !.getText()).toEqual(`'instance'`);
});
it('should find static methods on a class', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const staticMethod = members.find(member => member.name === 'staticMethod') !;
expect(staticMethod.kind).toEqual(ClassMemberKind.Method);
expect(staticMethod.isStatic).toEqual(true);
expect(ts.isMethodDeclaration(staticMethod.implementation !)).toEqual(true);
});
it('should find static properties on a class', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const staticProperty = members.find(member => member.name === 'staticProperty') !;
expect(staticProperty.kind).toEqual(ClassMemberKind.Property);
expect(staticProperty.isStatic).toEqual(true);
expect(ts.isPropertyAccessExpression(staticProperty.implementation !)).toEqual(true);
expect(staticProperty.value !.getText()).toEqual(`'static'`);
});
it('should throw if the symbol is not a class', () => {
const program = makeProgram(FOO_FUNCTION_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const functionNode =
getDeclaration(program, FOO_FUNCTION_FILE.name, 'foo', ts.isFunctionDeclaration);
expect(() => {
host.getMembersOfClass(functionNode);
}).toThrowError(`Attempted to get members of a non-class: "function foo() {}"`);
});
it('should return an empty array if there are no prop decorators', () => {
const program = makeProgram(SIMPLE_CLASS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
expect(members).toEqual([]);
});
it('should not process decorated properties in `propDecorators` if it is not an object literal',
() => {
const program = makeProgram(INVALID_PROP_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATORS_FILE.name, 'NotObjectLiteral', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
expect(members.map(member => member.name)).not.toContain('prop');
});
it('should ignore prop decorator elements that are not object literals', () => {
const program = makeProgram(INVALID_PROP_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATORS_FILE.name, 'NotObjectLiteralProp',
ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({
name: 'NotObjectLiteralPropDecorator'
}));
});
it('should ignore prop decorator elements that have no `type` property', () => {
const program = makeProgram(INVALID_PROP_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATORS_FILE.name, 'NoTypeProperty', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
});
it('should ignore prop decorator elements whose `type` value is not an identifier', () => {
const program = makeProgram(INVALID_PROP_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATORS_FILE.name, 'NotIdentifier', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
});
it('should use `getImportOfIdentifier()` to retrieve import info', () => {
let callCount = 0;
const spy =
spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier').and.callFake(() => {
callCount++;
return {name: `name${callCount}`, from: `from${callCount}`};
});
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
expect(spy).toHaveBeenCalled();
expect(spy.calls.allArgs().map(arg => arg[0].getText())).toEqual([
'Input',
'Input',
'HostBinding',
'Input',
'HostListener',
]);
const index = members.findIndex(member => member.name === 'input1');
expect(members[index].decorators !.length).toBe(1);
expect(members[index].decorators ![0].import).toEqual({name: 'name1', from: 'from1'});
});
describe('(returned prop decorators `args`)', () => {
it('should be an empty array if prop decorator has no `args` property', () => {
const program = makeProgram(INVALID_PROP_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NoArgsProperty',
ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if prop decorator\'s `args` has no property assignment', () => {
const program = makeProgram(INVALID_PROP_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if `args` property value is not an array literal', () => {
const program = makeProgram(INVALID_PROP_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_PROP_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral',
ts.isClassDeclaration);
const members = host.getMembersOfClass(classNode);
const prop = members.find(m => m.name === 'prop') !;
const decorators = prop.decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
expect(decorators[0].args).toEqual([]);
});
});
});
describe('getConstructorParameters()', () => {
it('should find the decorated constructor parameters', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters).toBeDefined();
expect(parameters !.map(parameter => parameter.name)).toEqual([
'_viewContainer', '_template', 'injected'
]);
expect(parameters !.map(parameter => parameter.type !.getText())).toEqual([
'ViewContainerRef', 'TemplateRef', 'undefined'
]);
});
it('should throw if the symbol is not a class', () => {
const program = makeProgram(FOO_FUNCTION_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const functionNode =
getDeclaration(program, FOO_FUNCTION_FILE.name, 'foo', ts.isFunctionDeclaration);
expect(() => { host.getConstructorParameters(functionNode); })
.toThrowError(
'Attempted to get constructor parameters of a non-class: "function foo() {}"');
});
it('should return `null` if there is no constructor', () => {
const program = makeProgram(SIMPLE_CLASS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters).toBe(null);
});
it('should return an array even if there are no decorators', () => {
const program = makeProgram(SIMPLE_CLASS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, SIMPLE_CLASS_FILE.name, 'NoDecoratorConstructorClass', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters).toEqual(jasmine.any(Array));
expect(parameters !.length).toEqual(1);
expect(parameters ![0].name).toEqual('foo');
expect(parameters ![0].decorators).toBe(null);
});
it('should return an empty array if there are no constructor parameters', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NoParameters', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters).toEqual([]);
});
it('should ignore `ctorParameters` if it is not an arrow function', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NotArrowFunction', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters !.length).toBe(1);
expect(parameters ![0]).toEqual(jasmine.objectContaining({
name: 'arg1',
decorators: null,
}));
});
it('should ignore `ctorParameters` if it does not return an array literal', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NotArrayLiteral', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters !.length).toBe(1);
expect(parameters ![0]).toEqual(jasmine.objectContaining({
name: 'arg1',
decorators: null,
}));
});
describe('(returned parameters `decorators`)', () => {
it('should ignore param decorator elements that are not object literals', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NotObjectLiteral', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters !.length).toBe(2);
expect(parameters ![0]).toEqual(jasmine.objectContaining({
name: 'arg1',
decorators: null,
}));
expect(parameters ![1]).toEqual(jasmine.objectContaining({
name: 'arg2',
decorators: jasmine.any(Array) as any
}));
});
it('should ignore param decorator elements that have no `type` property', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NoTypeProperty', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
const decorators = parameters ![0].decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NoTypePropertyDecorator2'}));
});
it('should ignore param decorator elements whose `type` value is not an identifier', () => {
const program = makeProgram(INVALID_CTOR_DECORATORS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATORS_FILE.name, 'NotIdentifier', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
const decorators = parameters ![0].decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0]).toEqual(jasmine.objectContaining({name: 'NotIdentifierDecorator'}));
});
it('should use `getImportOfIdentifier()` to retrieve import info', () => {
const mockImportInfo = {} as Import;
const spy = spyOn(Fesm2015ReflectionHost.prototype, 'getImportOfIdentifier')
.and.returnValue(mockImportInfo);
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
const decorators = parameters ![2].decorators !;
expect(decorators.length).toEqual(1);
expect(decorators[0].import).toBe(mockImportInfo);
const typeIdentifier = spy.calls.mostRecent().args[0] as ts.Identifier;
expect(typeIdentifier.text).toBe('Inject');
});
});
describe('(returned parameters `decorators.args`)', () => {
it('should be an empty array if param decorator has no `args` property', () => {
const program = makeProgram(INVALID_CTOR_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NoArgsProperty',
ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
expect(parameters !.length).toBe(1);
const decorators = parameters ![0].decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoArgsPropertyDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if param decorator\'s `args` has no property assignment', () => {
const program = makeProgram(INVALID_CTOR_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NoPropertyAssignment',
ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
const decorators = parameters ![0].decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NoPropertyAssignmentDecorator');
expect(decorators[0].args).toEqual([]);
});
it('should be an empty array if `args` property value is not an array literal', () => {
const program = makeProgram(INVALID_CTOR_DECORATOR_ARGS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode = getDeclaration(
program, INVALID_CTOR_DECORATOR_ARGS_FILE.name, 'NotArrayLiteral',
ts.isClassDeclaration);
const parameters = host.getConstructorParameters(classNode);
const decorators = parameters ![0].decorators !;
expect(decorators.length).toBe(1);
expect(decorators[0].name).toBe('NotArrayLiteralDecorator');
expect(decorators[0].args).toEqual([]);
});
});
});
describe('getDefinitionOfFunction()', () => {
it('should return an object describing the function declaration passed as an argument', () => {
const program = makeProgram(FUNCTION_BODY_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const fooNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'foo', ts.isFunctionDeclaration) !;
const fooDef = host.getDefinitionOfFunction(fooNode);
expect(fooDef.node).toBe(fooNode);
expect(fooDef.body !.length).toEqual(1);
expect(fooDef.body ![0].getText()).toEqual(`return x;`);
expect(fooDef.parameters.length).toEqual(1);
expect(fooDef.parameters[0].name).toEqual('x');
expect(fooDef.parameters[0].initializer).toBe(null);
const barNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'bar', ts.isFunctionDeclaration) !;
const barDef = host.getDefinitionOfFunction(barNode);
expect(barDef.node).toBe(barNode);
expect(barDef.body !.length).toEqual(1);
expect(ts.isReturnStatement(barDef.body ![0])).toBeTruthy();
expect(barDef.body ![0].getText()).toEqual(`return x + y;`);
expect(barDef.parameters.length).toEqual(2);
expect(barDef.parameters[0].name).toEqual('x');
expect(fooDef.parameters[0].initializer).toBe(null);
expect(barDef.parameters[1].name).toEqual('y');
expect(barDef.parameters[1].initializer !.getText()).toEqual('42');
const bazNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'baz', ts.isFunctionDeclaration) !;
const bazDef = host.getDefinitionOfFunction(bazNode);
expect(bazDef.node).toBe(bazNode);
expect(bazDef.body !.length).toEqual(3);
expect(bazDef.parameters.length).toEqual(1);
expect(bazDef.parameters[0].name).toEqual('x');
expect(bazDef.parameters[0].initializer).toBe(null);
const quxNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'qux', ts.isFunctionDeclaration) !;
const quxDef = host.getDefinitionOfFunction(quxNode);
expect(quxDef.node).toBe(quxNode);
expect(quxDef.body !.length).toEqual(2);
expect(quxDef.parameters.length).toEqual(1);
expect(quxDef.parameters[0].name).toEqual('x');
expect(quxDef.parameters[0].initializer).toBe(null);
const mooNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'moo', ts.isFunctionDeclaration) !;
const mooDef = host.getDefinitionOfFunction(mooNode);
expect(mooDef.node).toBe(mooNode);
expect(mooDef.body !.length).toEqual(3);
expect(mooDef.parameters).toEqual([]);
const juuNode =
getDeclaration(program, FUNCTION_BODY_FILE.name, 'juu', ts.isFunctionDeclaration) !;
const juuDef = host.getDefinitionOfFunction(juuNode);
expect(juuDef.node).toBe(juuNode);
expect(juuDef.body !.length).toEqual(2);
expect(juuDef.parameters).toEqual([]);
});
});
describe('getImportOfIdentifier()', () => {
it('should find the import of an identifier', () => {
const program = makeProgram(...IMPORTS_FILES);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const variableNode =
getDeclaration(program, IMPORTS_FILES[1].name, 'b', ts.isVariableDeclaration);
const importOfIdent = host.getImportOfIdentifier(variableNode.initializer as ts.Identifier);
expect(importOfIdent).toEqual({name: 'a', from: './a.js'});
});
it('should find the name by which the identifier was exported, not imported', () => {
const program = makeProgram(...IMPORTS_FILES);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const variableNode =
getDeclaration(program, IMPORTS_FILES[1].name, 'c', ts.isVariableDeclaration);
const importOfIdent = host.getImportOfIdentifier(variableNode.initializer as ts.Identifier);
expect(importOfIdent).toEqual({name: 'a', from: './a.js'});
});
it('should return null if the identifier was not imported', () => {
const program = makeProgram(...IMPORTS_FILES);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const variableNode =
getDeclaration(program, IMPORTS_FILES[1].name, 'd', ts.isVariableDeclaration);
const importOfIdent = host.getImportOfIdentifier(variableNode.initializer as ts.Identifier);
expect(importOfIdent).toBeNull();
});
});
describe('getDeclarationOfIdentifier()', () => {
it('should return the declaration of a locally defined identifier', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const ctrDecorators = host.getConstructorParameters(classNode) !;
const identifierOfViewContainerRef = ctrDecorators[0].type !as ts.Identifier;
const expectedDeclarationNode = getDeclaration(
program, SOME_DIRECTIVE_FILE.name, 'ViewContainerRef', ts.isVariableDeclaration);
const actualDeclaration = host.getDeclarationOfIdentifier(identifierOfViewContainerRef);
expect(actualDeclaration).not.toBe(null);
expect(actualDeclaration !.node).toBe(expectedDeclarationNode);
expect(actualDeclaration !.viaModule).toBe(null);
});
it('should return the declaration of an externally defined identifier', () => {
const program = makeProgram(SOME_DIRECTIVE_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const classNode =
getDeclaration(program, SOME_DIRECTIVE_FILE.name, 'SomeDirective', ts.isClassDeclaration);
const classDecorators = host.getDecoratorsOfDeclaration(classNode) !;
const identifierOfDirective = ((classDecorators[0].node as ts.ObjectLiteralExpression)
.properties[0] as ts.PropertyAssignment)
.initializer as ts.Identifier;
const expectedDeclarationNode = getDeclaration(
program, 'node_modules/@angular/core/index.ts', 'Directive', ts.isVariableDeclaration);
const actualDeclaration = host.getDeclarationOfIdentifier(identifierOfDirective);
expect(actualDeclaration).not.toBe(null);
expect(actualDeclaration !.node).toBe(expectedDeclarationNode);
expect(actualDeclaration !.viaModule).toBe('@angular/core');
});
});
describe('getExportsOfModule()', () => {
it('should return a map of all the exports from a given module', () => {
const program = makeProgram(...EXPORTS_FILES);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const file = program.getSourceFile(EXPORTS_FILES[1].name) !;
const exportDeclarations = host.getExportsOfModule(file);
expect(exportDeclarations).not.toBe(null);
expect(Array.from(exportDeclarations !.keys())).toEqual([
'Directive',
'a',
'b',
'c',
'd',
'e',
'DirectiveX',
'SomeClass',
]);
const values = Array.from(exportDeclarations !.values())
.map(declaration => [declaration.node.getText(), declaration.viaModule]);
expect(values).toEqual([
// TODO clarify what is expected here...
// [`Directive = callableClassDecorator()`, '@angular/core'],
[`Directive = callableClassDecorator()`, null],
[`a = 'a'`, null],
[`b = a`, null],
[`c = foo`, null],
[`d = b`, null],
[`e = 'e'`, null],
[`DirectiveX = Directive`, null],
['export class SomeClass {}', null],
]);
});
});
describe('isClass()', () => {
it('should return true if a given node is a TS class declaration', () => {
const program = makeProgram(SIMPLE_CLASS_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const node =
getDeclaration(program, SIMPLE_CLASS_FILE.name, 'EmptyClass', ts.isClassDeclaration);
expect(host.isClass(node)).toBe(true);
});
it('should return false if a given node is a TS function declaration', () => {
const program = makeProgram(FOO_FUNCTION_FILE);
const host = new Fesm2015ReflectionHost(program.getTypeChecker());
const node = getDeclaration(program, FOO_FUNCTION_FILE.name, 'foo', ts.isFunctionDeclaration);
expect(host.isClass(node)).toBe(false);
});
});
});