angular-cli/packages/ast-tools/src/ast-utils.spec.ts at master · Recruitee/angular-cli · GitHub

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import denodeify = require('denodeify');

import mockFs = require('mock-fs');

import ts = require('typescript');

import fs = require('fs');

import {InsertChange, NodeHost, RemoveChange} from './change';

import {insertAfterLastOccurrence, addDeclarationToModule} from './ast-utils';

import {findNodes} from './node';

import {it} from './spec-utils';

const readFile = <any>denodeify(fs.readFile);

describe('ast-utils: findNodes', () => {

const sourceFile = 'tmp/tmp.ts';

beforeEach(() => {

let mockDrive = {

'tmp': {

'tmp.ts': `import * as myTest from 'tests' \n` +

'hello.'

}

};

mockFs(mockDrive);

});

afterEach(() => {

mockFs.restore();

});

it('finds no imports', () => {

let editedFile = new RemoveChange(sourceFile, 0, `import * as myTest from 'tests' \n`);

return editedFile

.apply(NodeHost)

.then(() => {

let rootNode = getRootNode(sourceFile);

let nodes = findNodes(rootNode, ts.SyntaxKind.ImportDeclaration);

expect(nodes).toEqual([]);

});

it('finds one import', () => {

let rootNode = getRootNode(sourceFile);

let nodes = findNodes(rootNode, ts.SyntaxKind.ImportDeclaration);

expect(nodes.length).toEqual(1);

});

it('finds two imports from inline declarations', () => {

// remove new line and add an inline import

let editedFile = new RemoveChange(sourceFile, 32, '\n');

return editedFile

.apply(NodeHost)

.then(() => {

let insert = new InsertChange(sourceFile, 32, `import {Routes} from '@angular/routes'`);

return insert.apply(NodeHost);

})

.then(() => {

let rootNode = getRootNode(sourceFile);

let nodes = findNodes(rootNode, ts.SyntaxKind.ImportDeclaration);

expect(nodes.length).toEqual(2);

});

it('finds two imports from new line separated declarations', () => {

let editedFile = new InsertChange(sourceFile, 33, `import {Routes} from '@angular/routes'`);

return editedFile

.apply(NodeHost)

.then(() => {

let rootNode = getRootNode(sourceFile);

let nodes = findNodes(rootNode, ts.SyntaxKind.ImportDeclaration);

expect(nodes.length).toEqual(2);

});

describe('ast-utils: insertAfterLastOccurrence', () => {

const sourceFile = 'tmp/tmp.ts';

beforeEach(() => {

let mockDrive = {

'tmp': {

'tmp.ts': ''

}

};

mockFs(mockDrive);

});

afterEach(() => {

mockFs.restore();

});

it('inserts at beginning of file', () => {

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

return insertAfterLastOccurrence(imports, `\nimport { Router } from '@angular/router';`,

sourceFile, 0)

.apply(NodeHost)

.then(() => {

return readFile(sourceFile, 'utf8');

}).then((content) => {

let expected = '\nimport { Router } from \'@angular/router\';';

expect(content).toEqual(expected);

});

it('throws an error if first occurence with no fallback position', () => {

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

expect(() => insertAfterLastOccurrence(imports, `import { Router } from '@angular/router';`,

sourceFile)).toThrowError();

});

it('inserts after last import', () => {

let content = `import { foo, bar } from 'fizz';`;

let editedFile = new InsertChange(sourceFile, 0, content);

return editedFile

.apply(NodeHost)

.then(() => {

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

return insertAfterLastOccurrence(imports, ', baz', sourceFile,

0, ts.SyntaxKind.Identifier)

.apply(NodeHost);

})

.then(() => {

return readFile(sourceFile, 'utf8');

})

.then(newContent => expect(newContent).toEqual(`import { foo, bar, baz } from 'fizz';`));

});

it('inserts after last import declaration', () => {

let content = `import * from 'foo' \n import { bar } from 'baz'`;

let editedFile = new InsertChange(sourceFile, 0, content);

return editedFile

.apply(NodeHost)

.then(() => {

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

return insertAfterLastOccurrence(imports, `\nimport Router from '@angular/router'`,

sourceFile)

.apply(NodeHost);

})

.then(() => {

return readFile(sourceFile, 'utf8');

})

.then(newContent => {

let expected = `import * from 'foo' \n import { bar } from 'baz'` +

`\nimport Router from '@angular/router'`;

expect(newContent).toEqual(expected);

});

it('inserts correctly if no imports', () => {

let content = `import {} from 'foo'`;

let editedFile = new InsertChange(sourceFile, 0, content);

return editedFile

.apply(NodeHost)

.then(() => {

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

return insertAfterLastOccurrence(imports, ', bar', sourceFile, undefined,

ts.SyntaxKind.Identifier)

.apply(NodeHost);

})

.catch(() => {

return readFile(sourceFile, 'utf8');

})

.then(newContent => {

expect(newContent).toEqual(content);

// use a fallback position for safety

let imports = getNodesOfKind(ts.SyntaxKind.ImportDeclaration, sourceFile);

let pos = findNodes(imports.sort((a, b) => a.pos - b.pos).pop(),

ts.SyntaxKind.CloseBraceToken).pop().pos;

return insertAfterLastOccurrence(imports, ' bar ',

sourceFile, pos, ts.SyntaxKind.Identifier)

.apply(NodeHost);

})

.then(() => {

return readFile(sourceFile, 'utf8');

})

.then(newContent => {

expect(newContent).toEqual(`import { bar } from 'foo'`);

});

describe('addDeclarationToModule', () => {

beforeEach(() => {

mockFs({

'1.ts': `

import {NgModule} from '@angular/core';

@NgModule({

declarations: []

})

class Module {}`,

'2.ts': `

import {NgModule} from '@angular/core';

@NgModule({

declarations: [

Other

]

})

class Module {}`,

'3.ts': `

import {NgModule} from '@angular/core';

@NgModule({

})

class Module {}`,

'4.ts': `

import {NgModule} from '@angular/core';

@NgModule({

field1: [],

field2: {}

})

class Module {}`

});

afterEach(() => mockFs.restore());

it('works with empty array', () => {

return addDeclarationToModule('1.ts', 'MyClass', 'MyImportPath')

.then(change => change.apply(NodeHost))

.then(() => readFile('1.ts', 'utf-8'))

.then(content => {

expect(content).toEqual(

'\n' +

'import {NgModule} from \'@angular/core\';\n' +

'import { MyClass } from \'MyImportPath\';\n' +

'\n' +

'@NgModule({\n' +

' declarations: [MyClass]\n' +

'})\n' +

'class Module {}'

);

});

it('works with array with declarations', () => {

return addDeclarationToModule('2.ts', 'MyClass', 'MyImportPath')

.then(change => change.apply(NodeHost))

.then(() => readFile('2.ts', 'utf-8'))

.then(content => {

expect(content).toEqual(

'\n' +

'import {NgModule} from \'@angular/core\';\n' +

'import { MyClass } from \'MyImportPath\';\n' +

'\n' +

'@NgModule({\n' +

' declarations: [\n' +

' Other,\n' +

' MyClass\n' +

' ]\n' +

'})\n' +

'class Module {}'

);

});

it('works without any declarations', () => {

return addDeclarationToModule('3.ts', 'MyClass', 'MyImportPath')

.then(change => change.apply(NodeHost))

.then(() => readFile('3.ts', 'utf-8'))

.then(content => {

expect(content).toEqual(

'\n' +

'import {NgModule} from \'@angular/core\';\n' +

'import { MyClass } from \'MyImportPath\';\n' +

'\n' +

'@NgModule({\n' +

' declarations: [MyClass]\n' +

'})\n' +

'class Module {}'

);

});

it('works without a declaration field', () => {

return addDeclarationToModule('4.ts', 'MyClass', 'MyImportPath')

.then(change => change.apply(NodeHost))

.then(() => readFile('4.ts', 'utf-8'))

.then(content => {

expect(content).toEqual(

'\n' +

'import {NgModule} from \'@angular/core\';\n' +

'import { MyClass } from \'MyImportPath\';\n' +

'\n' +

'@NgModule({\n' +

' field1: [],\n' +

' field2: {},\n' +

' declarations: [MyClass]\n' +

'})\n' +

'class Module {}'

);

});

/**

* Gets node of kind kind from sourceFile

function getNodesOfKind(kind: ts.SyntaxKind, sourceFile: string) {

return findNodes(getRootNode(sourceFile), kind);

}

function getRootNode(sourceFile: string) {

return ts.createSourceFile(sourceFile, fs.readFileSync(sourceFile).toString(),

ts.ScriptTarget.ES6, true);

}

angular-cli/packages/ast-tools/src/ast-utils.spec.ts at master · Recruitee/angular-cli · GitHub

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