98 lines
2.7 KiB
TypeScript
98 lines
2.7 KiB
TypeScript
import {
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run,
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Distribution,
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resultMap,
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squiggleExpression,
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errorValueToString,
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} from "../../src/js/index";
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let testRun = (x: string): squiggleExpression => {
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let result = run(x, { sampleCount: 100, xyPointLength: 100 });
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expect(result.tag).toEqual("Ok");
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if (result.tag === "Ok") {
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return result.value;
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} else {
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throw Error(
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"Expected squiggle expression to evaluate but got error: " +
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errorValueToString(result.value)
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);
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}
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};
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function Ok<b>(x: b) {
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return { tag: "Ok", value: x };
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}
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describe("Simple calculations and results", () => {
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test("mean(normal(5,2))", () => {
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expect(testRun("mean(normal(5,2))")).toEqual({
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tag: "number",
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value: 5,
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});
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});
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test("10+10", () => {
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let foo = testRun("10 + 10");
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expect(foo).toEqual({ tag: "number", value: 20 });
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});
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});
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describe("Log function", () => {
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test("log(1) = 0", () => {
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let foo = testRun("log(1)");
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expect(foo).toEqual({ tag: "number", value: 0 });
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});
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});
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describe("Distribution", () => {
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//It's important that sampleCount is less than 9. If it's more, than that will create randomness
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//Also, note, the value should be created using makeSampleSetDist() later on.
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let env = { sampleCount: 8, xyPointLength: 100 };
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let dist1Samples = [3, 4, 5, 6, 6, 7, 10, 15, 30];
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let dist1SampleCount = dist1Samples.length;
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let dist = new Distribution(
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{ tag: "SampleSet", value: [3, 4, 5, 6, 6, 7, 10, 15, 30] },
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env
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);
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let dist2 = new Distribution(
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{ tag: "SampleSet", value: [20, 22, 24, 29, 30, 35, 38, 44, 52] },
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env
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);
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test("mean", () => {
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expect(dist.mean().value).toBeCloseTo(9.5555555);
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});
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test("pdf", () => {
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expect(dist.pdf(5.0).value).toBeCloseTo(0.10499097598222966, 1);
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});
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test("cdf", () => {
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expect(dist.cdf(5.0).value).toBeCloseTo(
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dist1Samples.filter((x) => x <= 5).length / dist1SampleCount,
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1
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);
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});
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test("inv", () => {
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expect(dist.inv(0.5).value).toBeCloseTo(6);
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});
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test("toPointSet", () => {
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expect(
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resultMap(dist.toPointSet(), (r: Distribution) => r.toString())
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).toEqual(Ok("Point Set Distribution"));
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});
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test("toSparkline", () => {
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expect(dist.toSparkline(20).value).toEqual("▁▁▃▇█▇▄▂▂▂▁▁▁▁▁▂▂▁▁▁");
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});
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test("algebraicAdd", () => {
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expect(
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resultMap(dist.algebraicAdd(dist2), (r: Distribution) =>
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r.toSparkline(20)
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).value
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).toEqual(Ok("▁▁▂▄▆████▇▆▄▄▃▃▃▂▁▁▁"));
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});
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test("pointwiseAdd", () => {
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expect(
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resultMap(dist.pointwiseAdd(dist2), (r: Distribution) =>
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r.toSparkline(20)
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).value
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).toEqual(Ok("▁▂██▃▃▃▃▄▅▄▃▃▂▂▂▁▁▁▁"));
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});
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});
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