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Donald Steinert
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Merge pull request #184 from shift-js/feat/lexer
implements lexer handling of basic sequence methods
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‎tests/lexerTests/lexerTestsThirdMilestone.js

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Original file line numberDiff line numberDiff line change
@@ -4736,6 +4736,146 @@ describe('Lexer: Third Milestone', function() {
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});
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describe('Sequence Type Methods', function () {
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it('should handle the contains method', function () {
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input = String.raw `var arr = [1,2,3,4,5]
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var yes = arr.contains(4)
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var no = arr.contains(6)`;
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output = [
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "OPERATOR", value: "=" },
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{ type: "ARRAY_START", value: "[" },
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{ type: "NUMBER", value: "1" },
4751+
{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "2" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "3" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "4" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "5" },
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{ type: "ARRAY_END", value: "]" },
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{ type: "TERMINATOR", value: "\\n"},
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "yes" },
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{ type: "OPERATOR", value: "=" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "DOT_SYNTAX", value: "." },
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{ type: "NATIVE_METHOD", value: "contains" },
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{ type: "INVOCATION_START", value: "(" },
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{ type: "NUMBER", value: "4" },
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{ type: "INVOCATION_END", value: ")" },
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{ type: "TERMINATOR", value: "\\n"},
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "no" },
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{ type: "OPERATOR", value: "=" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "DOT_SYNTAX", value: "." },
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{ type: "NATIVE_METHOD", value: "contains" },
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{ type: "INVOCATION_START", value: "(" },
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{ type: "NUMBER", value: "6" },
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{ type: "INVOCATION_END", value: ")" },
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{ type: "TERMINATOR", value: "EOF" }
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];
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expect(lexer(input)).to.deep.equal(output);
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});
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it('should handle the drop first method', function () {
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input = String.raw `var arr = [1,2,3,4,5]
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var lessFirst = arr.dropFirst()
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var lessFirstThree = arr.dropFirst(3)`;
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output = [
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "OPERATOR", value: "=" },
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{ type: "ARRAY_START", value: "[" },
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{ type: "NUMBER", value: "1" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "2" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "3" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "4" },
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{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "5" },
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{ type: "ARRAY_END", value: "]" },
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{ type: "TERMINATOR", value: "\\n"},
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "lessFirst" },
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{ type: "OPERATOR", value: "=" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "DOT_SYNTAX", value: "." },
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{ type: "NATIVE_METHOD", value: "dropFirst" },
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{ type: "INVOCATION_START", value: "(" },
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{ type: "INVOCATION_END", value: ")" },
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{ type: "TERMINATOR", value: "\\n"},
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{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "lessFirstThree" },
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{ type: "OPERATOR", value: "=" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "DOT_SYNTAX", value: "." },
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{ type: "NATIVE_METHOD", value: "dropFirst" },
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{ type: "INVOCATION_START", value: "(" },
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{ type: "NUMBER", value: "3" },
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{ type: "INVOCATION_END", value: ")" },
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{ type: "TERMINATOR", value: "EOF" }
4828+
];
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expect(lexer(input)).to.deep.equal(output);
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});
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4832+
it('should handle the drop first method', function () {
4833+
input = String.raw `var arr = [1,2,3,4,5]
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var lessLast = arr.dropLast()
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var lessLastThree = arr.dropLast(3)`;
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output = [
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{ type: "DECLARATION_KEYWORD", value: "var" },
4838+
{ type: "IDENTIFIER", value: "arr" },
4839+
{ type: "OPERATOR", value: "=" },
4840+
{ type: "ARRAY_START", value: "[" },
4841+
{ type: "NUMBER", value: "1" },
4842+
{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "2" },
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{ type: "PUNCTUATION", value: "," },
4845+
{ type: "NUMBER", value: "3" },
4846+
{ type: "PUNCTUATION", value: "," },
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{ type: "NUMBER", value: "4" },
4848+
{ type: "PUNCTUATION", value: "," },
4849+
{ type: "NUMBER", value: "5" },
4850+
{ type: "ARRAY_END", value: "]" },
4851+
{ type: "TERMINATOR", value: "\\n"},
4852+
4853+
{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "lessLast" },
4855+
{ type: "OPERATOR", value: "=" },
4856+
{ type: "IDENTIFIER", value: "arr" },
4857+
{ type: "DOT_SYNTAX", value: "." },
4858+
{ type: "NATIVE_METHOD", value: "dropLast" },
4859+
{ type: "INVOCATION_START", value: "(" },
4860+
{ type: "INVOCATION_END", value: ")" },
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{ type: "TERMINATOR", value: "\\n"},
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4863+
{ type: "DECLARATION_KEYWORD", value: "var" },
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{ type: "IDENTIFIER", value: "lessLastThree" },
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{ type: "OPERATOR", value: "=" },
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{ type: "IDENTIFIER", value: "arr" },
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{ type: "DOT_SYNTAX", value: "." },
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{ type: "NATIVE_METHOD", value: "dropLast" },
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{ type: "INVOCATION_START", value: "(" },
4870+
{ type: "NUMBER", value: "3" },
4871+
{ type: "INVOCATION_END", value: ")" },
4872+
{ type: "TERMINATOR", value: "EOF" }
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];
4874+
expect(lexer(input)).to.deep.equal(output);
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});
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});
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});
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describe('Fizz Buzz Examples', function () {

‎transpiler/lexer/lexicalTypes.js

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@@ -14,7 +14,10 @@ module.exports = {
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'abs': 'NATIVE_METHOD',
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'advancedBy': 'NATIVE_METHOD',
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'append': 'NATIVE_METHOD',
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'contains': 'NATIVE_METHOD',
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'distanceTo': 'NATIVE_METHOD',
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'dropFirst': 'NATIVE_METHOD',
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'dropLast': 'NATIVE_METHOD',
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'hasPrefix': 'NATIVE_METHOD',
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'hasSuffix': 'NATIVE_METHOD',
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'insert': 'NATIVE_METHOD',

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