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generate-bytecode.spec.js
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generate-bytecode.spec.js
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"use strict";
const chai = require("chai");
const helpers = require("./helpers");
const pass = require("peggy/lib/compiler/passes/generate-bytecode");
chai.use(helpers);
const expect = chai.expect;
describe("compiler pass |generateBytecode|", function() {
function bytecodeDetails(bytecode) {
return {
rules: [{ bytecode: bytecode }]
};
}
function constsDetails(consts) { return { consts: consts }; }
describe("for grammar", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST([
"a = 'a'",
"b = 'b'",
"c = 'c'"
].join("\n"), {
rules: [
{ bytecode: [18, 0, 2, 2, 22, 0, 23, 1] },
{ bytecode: [18, 2, 2, 2, 22, 2, 23, 3] },
{ bytecode: [18, 4, 2, 2, 22, 4, 23, 5] }
]
});
});
it("defines correct constants", function() {
expect(pass).to.changeAST([
"a = 'a'",
"b = 'b'",
"c = 'c'"
].join("\n"), constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"\"b\"",
"peg$literalExpectation(\"b\", false)",
"\"c\"",
"peg$literalExpectation(\"c\", false)"
]));
});
});
describe("for rule", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = 'a'", bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for named", function() {
const grammar = "start 'start' = 'a'";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
28, // SILENT_FAILS_ON
18, 1, 2, 2, 22, 1, 23, 2, // <expression>
29, // SILENT_FAILS_OFF
14, 2, 0, // IF_ERROR
23, 0 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"peg$otherExpectation(\"start\")",
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for choice", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = 'a' / 'b' / 'c'", bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1, // <alternatives[0]>
14, 21, 0, // IF_ERROR
6, // * POP
18, 2, 2, 2, 22, 2, 23, 3, // <alternatives[1]>
14, 9, 0, // IF_ERROR
6, // * POP
18, 4, 2, 2, 22, 4, 23, 5 // <alternatives[2]>
]));
});
});
describe("for action", function() {
describe("without labels", function() {
const grammar = "start = 'a' { code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 6, 0, // IF_NOT_ERROR
24, 1, // * LOAD_SAVED_POS
26, 2, 1, 0, // CALL
9 // NIP
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"function() { code }"
]));
});
});
describe("with one label", function() {
const grammar = "start = a:'a' { code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 7, 0, // IF_NOT_ERROR
24, 1, // * LOAD_SAVED_POS
26, 2, 1, 1, 0, // CALL
9 // NIP
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"function(a) { code }"
]));
});
});
describe("with multiple labels", function() {
const grammar = "start = a:'a' b:'b' c:'c' { code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 40, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 25, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 10, 4, // IF_NOT_ERROR
24, 3, // * LOAD_SAVED_POS
26, 6, 3, 3, 2, 1, 0, // CALL
9, // NIP
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"\"b\"",
"peg$literalExpectation(\"b\", false)",
"\"c\"",
"peg$literalExpectation(\"c\", false)",
"function(a, b, c) { code }"
]));
});
});
});
describe("for sequence", function() {
const grammar = "start = 'a' 'b' 'c'";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 33, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 18, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 3, 4, // IF_NOT_ERROR
11, 3, // * WRAP
9, // NIP
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"\"b\"",
"peg$literalExpectation(\"b\", false)",
"\"c\"",
"peg$literalExpectation(\"c\", false)"
]));
});
});
describe("for labeled", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = a:'a'", bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for text", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = $'a'", bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 2, 1, // IF_NOT_ERROR
6, // * POP
12, // TEXT
9 // * NIP
]));
});
});
describe("for simple_and", function() {
const grammar = "start = &'a'";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
28, // SILENT_FAILS_ON
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
29, // SILENT_FAILS_OFF
15, 3, 3, // IF_NOT_ERROR
6, // * POP
7, // POP_CURR_POS
1, // PUSH_UNDEFINED
6, // * POP
6, // POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for simple_not", function() {
const grammar = "start = !'a'";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
28, // SILENT_FAILS_ON
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
29, // SILENT_FAILS_OFF
14, 3, 3, // IF_ERROR
6, // * POP
6, // POP
1, // PUSH_UNDEFINED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for optional", function() {
const grammar = "start = 'a'?";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
14, 2, 0, // IF_ERROR
6, // * POP
2 // PUSH_NULL
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for zero_or_more", function() {
const grammar = "start = 'a'*";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
4, // PUSH_EMPTY_ARRAY
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
16, 9, // WHILE_NOT_ERROR
10, // * APPEND
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
6 // POP
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for one_or_more", function() {
const grammar = "start = 'a'+";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
4, // PUSH_EMPTY_ARRAY
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
15, 12, 3, // IF_NOT_ERROR
16, 9, // * WHILE_NOT_ERROR
10, // * APPEND
18, 0, 2, 2, 22, 0, 23, 1, // <expression>
6, // POP
6, // * POP
6, // POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("for group", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = ('a')", bytecodeDetails([
18, 0, 2, 2, 22, 0, 23, 1 // <expression>
]));
});
});
describe("for semantic_and", function() {
describe("without labels", function() {
const grammar = "start = &{ code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
25, // UPDATE_SAVED_POS
26, 0, 0, 0, // CALL
13, 2, 2, // IF
6, // * POP
1, // PUSH_UNDEFINED
6, // * POP
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(
grammar,
constsDetails(["function() { code }"])
);
});
});
describe("with labels", function() {
const grammar = "start = a:'a' b:'b' c:'c' &{ code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 55, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 40, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 25, 4, // IF_NOT_ERROR
25, // * UPDATE_SAVED_POS
26, 6, 0, 3, 2, 1, 0, // CALL
13, 2, 2, // IF
6, // * POP
1, // PUSH_UNDEFINED
6, // * POP
3, // PUSH_FAILED
15, 3, 4, // IF_NOT_ERROR
11, 4, // * WRAP
9, // NIP
8, 4, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"\"b\"",
"peg$literalExpectation(\"b\", false)",
"\"c\"",
"peg$literalExpectation(\"c\", false)",
"function(a, b, c) { code }"
]));
});
});
});
describe("for semantic_not", function() {
describe("without labels", function() {
const grammar = "start = !{ code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
25, // UPDATE_SAVED_POS
26, 0, 0, 0, // CALL
13, 2, 2, // IF
6, // * POP
3, // PUSH_FAILED
6, // * POP
1 // PUSH_UNDEFINED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(
grammar,
constsDetails(["function() { code }"])
);
});
});
describe("with labels", function() {
const grammar = "start = a:'a' b:'b' c:'c' !{ code }";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
5, // PUSH_CURR_POS
18, 0, 2, 2, 22, 0, 23, 1, // <elements[0]>
15, 55, 3, // IF_NOT_ERROR
18, 2, 2, 2, 22, 2, 23, 3, // * <elements[1]>
15, 40, 4, // IF_NOT_ERROR
18, 4, 2, 2, 22, 4, 23, 5, // * <elements[2]>
15, 25, 4, // IF_NOT_ERROR
25, // * UPDATE_SAVED_POS
26, 6, 0, 3, 2, 1, 0, // CALL
13, 2, 2, // IF
6, // * POP
3, // PUSH_FAILED
6, // * POP
1, // PUSH_UNDEFINED
15, 3, 4, // IF_NOT_ERROR
11, 4, // * WRAP
9, // NIP
8, 4, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 3, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
8, 2, // * POP_N
7, // POP_CURR_POS
3, // PUSH_FAILED
6, // * POP
7, // POP_CURR_POS
3 // PUSH_FAILED
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)",
"\"b\"",
"peg$literalExpectation(\"b\", false)",
"\"c\"",
"peg$literalExpectation(\"c\", false)",
"function(a, b, c) { code }"
]));
});
});
});
describe("for rule_ref", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST([
"start = other",
"other = 'other'"
].join("\n"), {
rules: [
{
bytecode: [27, 1] // RULE
},
{ }
]
});
});
});
describe("for literal", function() {
describe("empty", function() {
const grammar = "start = ''";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
0, 0 // PUSH
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails(["\"\""]));
});
});
describe("non-empty case-sensitive", function() {
const grammar = "start = 'a'";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
18, 0, 2, 2, // MATCH_STRING
22, 0, // * ACCEPT_STRING
23, 1 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"a\", false)"
]));
});
});
describe("non-empty case-insensitive", function() {
const grammar = "start = 'A'i";
it("generates correct bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
19, 0, 2, 2, // MATCH_STRING_IC
21, 1, // * ACCEPT_N
23, 1 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(grammar, constsDetails([
"\"a\"",
"peg$literalExpectation(\"A\", true)"
]));
});
});
});
describe("for class", function() {
it("generates correct bytecode", function() {
expect(pass).to.changeAST("start = [a]", bytecodeDetails([
20, 0, 2, 2, // MATCH_REGEXP
21, 1, // * ACCEPT_N
23, 1 // * FAIL
]));
});
describe("non-inverted case-sensitive", function() {
it("defines correct constants", function() {
expect(pass).to.changeAST("start = [a]", constsDetails([
"/^[a]/",
"peg$classExpectation([\"a\"], false, false)"
]));
});
});
describe("inverted case-sensitive", function() {
it("defines correct constants", function() {
expect(pass).to.changeAST("start = [^a]", constsDetails([
"/^[^a]/",
"peg$classExpectation([\"a\"], true, false)"
]));
});
});
describe("non-inverted case-insensitive", function() {
it("defines correct constants", function() {
expect(pass).to.changeAST("start = [a]i", constsDetails([
"/^[a]/i",
"peg$classExpectation([\"a\"], false, true)"
]));
});
});
describe("complex", function() {
it("defines correct constants", function() {
expect(pass).to.changeAST("start = [ab-def-hij-l]", constsDetails([
"/^[ab-def-hij-l]/",
"peg$classExpectation([\"a\", [\"b\", \"d\"], \"e\", [\"f\", \"h\"], \"i\", [\"j\", \"l\"]], false, false)"
]));
});
});
});
describe("for any", function() {
const grammar = "start = .";
it("generates bytecode", function() {
expect(pass).to.changeAST(grammar, bytecodeDetails([
17, 2, 2, // MATCH_ANY
21, 1, // * ACCEPT_N
23, 0 // * FAIL
]));
});
it("defines correct constants", function() {
expect(pass).to.changeAST(
grammar,
constsDetails(["peg$anyExpectation()"])
);
});
});
});