botlang /
botlang-js
| Conditions | 1 |
| Paths | 1 |
| Total Lines | 138 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
| 1 | 'use strict'; |
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| 9 | describe(`${pkg.name}/Lexer/Lexer`, () => { |
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| 10 | /** @test {Lexer#constructor} */ |
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| 11 | describe('#constructor', () => { |
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| 12 | it('Create a new instance of type Lexer', () => { |
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| 13 | const input = new Input('+ hello botlang'); |
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| 14 | |||
| 15 | assert.instanceOf( |
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| 16 | new Lexer(input), Lexer |
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| 17 | ); |
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| 18 | }); |
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| 19 | }); |
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| 20 | |||
| 21 | /** @test {Lexer#next} */ |
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| 22 | describe('#next', () => { |
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| 23 | it('Ignore comments', () => { |
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| 24 | const input = new Input('# A comment'), |
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| 25 | token = new Lexer(input).next(); |
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| 26 | |||
| 27 | assert.isNull(token); |
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| 28 | }); |
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| 29 | |||
| 30 | it('Return string token', () => { |
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| 31 | const input = new Input('"Hello World"'), |
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| 32 | token = new Lexer(input).next(); |
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| 33 | |||
| 34 | assert.instanceOf(token, Token); |
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| 35 | assert.strictEqual(token.getType(), 'string'); |
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| 36 | assert.strictEqual(token.getValue(), 'Hello World'); |
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| 37 | }); |
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| 38 | |||
| 39 | it('Return numeric token', () => { |
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| 40 | const tests = [ |
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| 41 | 1, 1.2, 1234567890, 1234567.890 |
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| 42 | ]; |
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| 43 | |||
| 44 | tests.forEach((test) => { |
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| 45 | const input = new Input(test), |
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| 46 | token = new Lexer(input).next(); |
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| 47 | |||
| 48 | assert.instanceOf(token, Token); |
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| 49 | assert.strictEqual(token.getType(), 'numeric'); |
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| 50 | assert.strictEqual(token.getValue(), test); |
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| 51 | }); |
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| 52 | }); |
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| 53 | |||
| 54 | it('Return operation token', () => { |
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| 55 | const tests = [ |
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| 56 | '+', |
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| 57 | '-', |
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| 58 | '*', |
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| 59 | '/', |
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| 60 | '%', |
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| 61 | '=', |
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| 62 | '&', |
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| 63 | '|', |
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| 64 | '<', |
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| 65 | '>', |
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| 66 | '!' |
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| 67 | ]; |
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| 68 | |||
| 69 | tests.forEach((test) => { |
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| 70 | const input = new Input(test), |
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| 71 | token = new Lexer(input).next(); |
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| 72 | |||
| 73 | assert.instanceOf(token, Token); |
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| 74 | assert.strictEqual(token.getType(), 'operation'); |
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| 75 | assert.strictEqual(token.getValue(), test); |
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| 76 | }); |
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| 77 | }); |
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| 78 | |||
| 79 | it('Return punctuator token', () => { |
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| 80 | const tests = [ |
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| 81 | ',', |
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| 82 | ';', |
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| 83 | '(', |
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| 84 | ')', |
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| 85 | '{', |
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| 86 | '}', |
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| 87 | '[', |
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| 88 | ']' |
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| 89 | ]; |
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| 90 | |||
| 91 | tests.forEach((test) => { |
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| 92 | const input = new Input(test), |
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| 93 | token = new Lexer(input).next(); |
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| 94 | |||
| 95 | assert.instanceOf(token, Token); |
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| 96 | assert.strictEqual(token.getType(), 'punctuator'); |
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| 97 | assert.strictEqual(token.getValue(), test); |
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| 98 | }); |
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| 99 | }); |
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| 100 | |||
| 101 | it('Return identifier token', () => { |
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| 102 | const tests = [ |
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| 103 | 'functionName' |
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| 104 | ]; |
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| 105 | |||
| 106 | tests.forEach((test) => { |
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| 107 | const input = new Input(test), |
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| 108 | token = new Lexer(input).next(); |
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| 109 | |||
| 110 | assert.instanceOf(token, Token); |
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| 111 | assert.strictEqual(token.getType(), 'identifier'); |
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| 112 | assert.strictEqual(token.getValue(), test); |
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| 113 | }); |
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| 114 | }); |
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| 115 | |||
| 116 | it('Return keyword token', () => { |
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| 117 | reservedKeywords.forEach((test) => { |
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| 118 | const input = new Input(test), |
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| 119 | token = new Lexer(input).next(); |
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| 120 | |||
| 121 | assert.instanceOf(token, Token); |
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| 122 | assert.strictEqual(token.getType(), 'keyword'); |
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| 123 | assert.strictEqual(token.getValue(), test); |
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| 124 | }); |
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| 125 | }); |
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| 126 | |||
| 127 | it('Throw invalid character error', () => { |
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| 128 | const input = new Input('~'), |
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| 129 | lexer = new Lexer(input); |
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| 130 | |||
| 131 | assert.throws(() => lexer.next(), Error, 'Invalid character (Line: 1, Column: 0)'); |
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| 132 | }); |
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| 133 | }); |
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| 134 | |||
| 135 | /** @test {Lexer#peek} */ |
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| 136 | describe('#peek', () => { |
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| 137 | it('Return the current token.', () => { |
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| 138 | const input = new Input('"hello botlang"'), |
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| 139 | lexer = new Lexer(input); |
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| 140 | |||
| 141 | assert.instanceOf( |
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| 142 | lexer.peek(), Token |
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| 143 | ); |
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| 144 | }); |
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| 145 | }); |
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| 146 | }); |
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| 147 |
