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'use strict'; |
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import { assert } from 'chai'; |
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import { Input, Lexer, Token } from '../../src/Lexer'; |
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import reservedKeywords from '../../lang/ReservedKeywords.json'; |
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import pkg from '../../package.json'; |
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/** @test {Lexer} */ |
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describe(`${pkg.name}/Lexer/Lexer`, () => { |
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/** @test {Lexer#constructor} */ |
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describe('#constructor', () => { |
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it('Create a new instance of type Lexer', () => { |
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const input = new Input('+ hello botlang'); |
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assert.instanceOf( |
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new Lexer(input), Lexer |
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); |
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}); |
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}); |
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/** @test {Lexer#next} */ |
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describe('#next', () => { |
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it('Ignore comments', () => { |
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const input = new Input('# A comment'), |
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token = new Lexer(input).next(); |
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assert.isNull(token); |
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}); |
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it('Return string token', () => { |
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const input = new Input('"Hello World"'), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'string'); |
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assert.strictEqual(token.getValue(), 'Hello World'); |
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}); |
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it('Return numeric token', () => { |
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const tests = [ |
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1, 1.2, 1234567890, 1234567.890 |
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]; |
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tests.forEach((test) => { |
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const input = new Input(test), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'numeric'); |
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assert.strictEqual(token.getValue(), test); |
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}); |
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}); |
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it('Return operation token', () => { |
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const tests = [ |
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'+', |
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'-', |
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'*', |
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'/', |
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'%', |
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'=', |
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'&', |
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'|', |
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'<', |
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'>', |
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'!' |
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]; |
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tests.forEach((test) => { |
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const input = new Input(test), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'operation'); |
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assert.strictEqual(token.getValue(), test); |
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}); |
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}); |
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it('Return punctuator token', () => { |
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const tests = [ |
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',', |
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';', |
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'(', |
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')', |
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'{', |
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'}', |
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'[', |
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']' |
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]; |
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tests.forEach((test) => { |
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const input = new Input(test), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'punctuator'); |
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assert.strictEqual(token.getValue(), test); |
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}); |
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}); |
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it('Return identifier token', () => { |
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const tests = [ |
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'functionName' |
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]; |
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tests.forEach((test) => { |
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const input = new Input(test), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'identifier'); |
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assert.strictEqual(token.getValue(), test); |
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}); |
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}); |
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it('Return keyword token', () => { |
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reservedKeywords.forEach((test) => { |
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const input = new Input(test), |
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token = new Lexer(input).next(); |
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assert.instanceOf(token, Token); |
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assert.strictEqual(token.getType(), 'keyword'); |
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assert.strictEqual(token.getValue(), test); |
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}); |
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}); |
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it('Throw invalid character error', () => { |
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const input = new Input('~'), |
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lexer = new Lexer(input); |
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assert.throws(() => lexer.next(), Error, 'Invalid character (Line: 1, Column: 0)'); |
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}); |
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}); |
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/** @test {Lexer#peek} */ |
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describe('#peek', () => { |
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it('Return the current token.', () => { |
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const input = new Input('"hello botlang"'), |
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lexer = new Lexer(input); |
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assert.instanceOf( |
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lexer.peek(), Token |
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); |
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}); |
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}); |
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}); |
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botlang /
botlang-js
