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136 lines (115 loc) · 3.37 KB
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import Core from "../lib/core";
const Patterns = Core.Patterns;
const SpecialForms = Core.SpecialForms;
const Tuple = Core.Tuple;
const BitString = Core.BitString;
import Enum from "../lib/enum";
import chai from "chai";
var expect = chai.expect;
const $ = Patterns.variable();
const collectable = {
into: function(original) {
const fun = Patterns.defmatch(
Patterns.clause(
[
$,
Patterns.type(Tuple, {
values: [Symbol.for("cont"), Patterns.variable()]
})
],
(list, x) => list.concat([x])
),
Patterns.clause([$, Symbol.for("done")], list => list)
);
return new Tuple([], fun);
}
};
describe("for", () => {
it("simple for", () => {
let gen = Patterns.list_generator($, [1, 2, 3, 4]);
let result = SpecialForms._for(
Patterns.clause([$], x => x * 2),
[gen],
collectable
);
expect(result).to.eql([2, 4, 6, 8]);
});
it("for with multiple generators", () => {
//for x <- [1, 2], y <- [2, 3], do: x*y
let gen = Patterns.list_generator($, [1, 2]);
let gen2 = Patterns.list_generator($, [2, 3]);
let result = SpecialForms._for(
Patterns.clause([$, $], (x, y) => x * y),
[gen, gen2],
collectable
);
expect(result).to.eql([2, 3, 4, 6]);
});
it("for with filter", () => {
//for n <- [1, 2, 3, 4, 5, 6], rem(n, 2) == 0, do: n
let gen = Patterns.list_generator($, [1, 2, 3, 4, 5, 6]);
let result = SpecialForms._for(
Patterns.clause([$], x => x, x => x % 2 === 0),
[gen],
collectable
);
expect(result).to.eql([2, 4, 6]);
});
it("for with pattern matching", () => {
//for {:user, name} <- [user: "john", admin: "john", user: "meg"], do
// String.upcase(name)
//end
let gen = Patterns.list_generator([Symbol.for("user"), $], [
[Symbol.for("user"), "john"],
[Symbol.for("admin"), "john"],
[Symbol.for("user"), "meg"]
]);
let result = SpecialForms._for(
Patterns.clause([[Symbol.for("user"), $]], name => name.toUpperCase()),
[gen],
collectable
);
expect(result).to.eql(["JOHN", "MEG"]);
});
it("for with bitstring", () => {
//for <<r::8, g::8, b::8 <- <<213, 45, 132, 64, 76, 32, 76, 0, 0, 234, 32, 15>> >>, do: {r, g, b}
let gen = Patterns.bitstring_generator(
Patterns.bitStringMatch(
BitString.integer({ value: $ }),
BitString.integer({ value: $ }),
BitString.integer({ value: $ })
),
new BitString(
BitString.integer(213),
BitString.integer(45),
BitString.integer(132),
BitString.integer(64),
BitString.integer(76),
BitString.integer(32),
BitString.integer(76),
BitString.integer(0),
BitString.integer(0),
BitString.integer(234),
BitString.integer(32),
BitString.integer(15)
)
);
let expression = Patterns.clause(
[
Patterns.bitStringMatch(
BitString.integer({ value: $ }),
BitString.integer({ value: $ }),
BitString.integer({ value: $ })
)
],
(r, g, b) => new Tuple(r, g, b)
);
let result = SpecialForms._for(expression, [gen], collectable);
expect(result).to.eql([
new Tuple(213, 45, 132),
new Tuple(64, 76, 32),
new Tuple(76, 0, 0),
new Tuple(234, 32, 15)
]);
});
});