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122 lines
3.1 KiB
122 lines
3.1 KiB
var test = require('tape')
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var assert = require('assert')
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var parse = require('acorn').parse
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var getAssignedIdentifiers = require('../')
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function getName (node) {
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assert.equal(node.type, 'Identifier', 'Returned node must be an Identifier')
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return node.name
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}
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test('example', function (t) {
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t.plan(1)
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var ast = parse(`
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var { a, b: [ c,, ...x ], d } = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [
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'a',
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'c',
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'x',
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'd'
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])
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})
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test('simple identifiers', function (t) {
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t.plan(1)
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var ast = parse(`
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var xyz = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'xyz' ])
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})
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test('array destructuring', function (t) {
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t.plan(1)
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var ast = parse(`
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var [a, b, c] = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b', 'c' ])
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})
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test('array destructuring with rest element', function (t) {
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t.plan(1)
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var ast = parse(`
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var [a, b, ...rest] = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b', 'rest' ])
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})
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test('array destructuring with holes', function (t) {
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t.plan(1)
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var ast = parse(`
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var [a, b,,,,,, boop] = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b', 'boop' ])
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})
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test('nested array destructuring', function (t) {
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t.plan(1)
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var ast = parse(`
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var [a, [[[b]], ...c], boop] = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b', 'c', 'boop' ])
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})
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test('object destructuring', function (t) {
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t.plan(1)
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var ast = parse(`
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var {a, b} = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b' ])
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})
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test('object destructuring with different names', function (t) {
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t.plan(1)
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var ast = parse(`
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var {a: b, b: lol} = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'b', 'lol' ])
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})
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test('nested object destructuring', function (t) {
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t.plan(1)
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var ast = parse(`
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var {a: {b}, b: lol, c: {
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d, e: { f: g }
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}} = whatever()
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`)
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'b', 'lol', 'd', 'g' ])
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})
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test('object rest destructuring', function (t) {
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t.plan(1)
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var ast = parse(`
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var {a, ...b} = whatever()
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`, { ecmaVersion: 9 })
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var node = ast.body[0].declarations[0].id
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'a', 'b' ])
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})
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test('import declarations', function (t) {
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t.plan(2)
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var ast = parse(`
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import x, { y, z as a } from 'module'
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`, { sourceType: 'module' })
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var node = ast.body[0]
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'x', 'y', 'a' ])
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ast = parse(`
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import * as ns from 'module'
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`, { sourceType: 'module' })
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node = ast.body[0]
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t.deepEqual(getAssignedIdentifiers(node).map(getName), [ 'ns' ])
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})
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