Added tests for index.js and fixed some corresponding functionality

packages/squiggle-lang/__tests__/JS__Test.ts

@@ -1,34 +1,66 @@
-import { run } from '../src/js/index';
+import { run, GenericDist, resultMap } from "../src/js/index";
 
 let testRun = (x: string) => {
-  let result = run(x)
-  if(result.tag == 'Ok'){
-    return { tag: 'Ok', value: result.value.exports }
+  let result = run(x);
+  if (result.tag == "Ok") {
+    return { tag: "Ok", value: result.value.exports };
+  } else {
+    return result;
   }
-  else {
-    return result
-  }
-}
+};
 
 describe("Simple calculations and results", () => {
   test("mean(normal(5,2))", () => {
-        expect(testRun("mean(normal(5,2))")).toEqual({ tag: 'Ok', value: [ { NAME: 'Float', VAL: 5  } ] })
-    })
+    expect(testRun("mean(normal(5,2))")).toEqual({
+      tag: "Ok",
+      value: [{ NAME: "Float", VAL: 5 }],
+    });
+  });
   test("10+10", () => {
-        let foo = testRun("10 + 10")
-        expect(foo).toEqual({ tag: 'Ok', value: [ { NAME: 'Float', VAL: 20  } ] })
-    })
-})
+    let foo = testRun("10 + 10");
+    expect(foo).toEqual({ tag: "Ok", value: [{ NAME: "Float", VAL: 20 }] });
+  });
+});
 describe("Log function", () => {
   test("log(1) = 0", () => {
-      let foo = testRun("log(1)")
-      expect(foo).toEqual({ tag: 'Ok', value: [ { NAME: 'Float', VAL: 0} ]})
-    })
-})
+    let foo = testRun("log(1)");
+    expect(foo).toEqual({ tag: "Ok", value: [{ NAME: "Float", VAL: 0 }] });
+  });
+});
 
 describe("Multimodal too many weights error", () => {
   test("mm(0,0,[0,0,0])", () => {
-      let foo = testRun("mm(0,0,[0,0,0])")
-      expect(foo).toEqual({ "tag": "Error", "value": "Function multimodal error: Too many weights provided" })
-    })
+    let foo = testRun("mm(0,0,[0,0,0])");
+    expect(foo).toEqual({
+      tag: "Error",
+      value: "Function multimodal error: Too many weights provided",
+    });
+  });
+});
+
+describe("GenericDist", () => {
+  let dist = new GenericDist(
+    { tag: "SampleSet", value: [3, 4, 5, 6, 6, 7, 10, 15, 30] },
+    { sampleCount: 100, xyPointLength: 100 }
+  );
+  test("mean", () => {
+    expect(dist.mean().value).toBeCloseTo(3.737);
+  });
+  test("pdf", () => {
+    expect(dist.pdf(5.0).value).toBeCloseTo(0.0431);
+  });
+  test("cdf", () => {
+    expect(dist.cdf(5.0).value).toBeCloseTo(0.155);
+  });
+  test("inv", () => {
+    expect(dist.inv(0.5).value).toBeCloseTo(9.458);
+  });
+  test("toPointSet", () => {
+    expect(
+      resultMap(dist.toPointSet(), (r: GenericDist) => r.toString()).value.value
+    ).toBe("Point Set Distribution");
+  });
+  test("toSparkline", () => {
+    expect(dist.toSparkline(20).value).toBe("▁▁▃▅███▆▄▃▂▁▁▂▂▃▂▁▁▁");
+  });
 });

packages/squiggle-lang/src/js/index.ts

@@ -7,7 +7,6 @@ import type {
 } from "../rescript/ProgramEvaluator.gen";
 export type { SamplingInputs, exportEnv, exportDistribution };
 export type { t as DistPlus } from "../rescript/OldInterpreter/DistPlus.gen";
-import type { Operation_genericFunctionCallInfo } from "../rescript/Distributions/GenericDist/GenericDist_Types.gen";
 import {
   genericDist,
   resultDist,
@@ -16,30 +15,30 @@ import {
 } from "../rescript/TSInterface.gen";
 import {
   env,
-  Constructors_UsingDists_mean,
-  Constructors_UsingDists_sample,
-  Constructors_UsingDists_pdf,
-  Constructors_UsingDists_cdf,
-  Constructors_UsingDists_inv,
-  Constructors_UsingDists_normalize,
-  Constructors_UsingDists_toPointSet,
-  Constructors_UsingDists_toSampleSet,
-  Constructors_UsingDists_truncate,
-  Constructors_UsingDists_inspect,
-  Constructors_UsingDists_toString,
-  Constructors_UsingDists_toSparkline,
-  Constructors_UsingDists_algebraicAdd,
-  Constructors_UsingDists_algebraicMultiply,
-  Constructors_UsingDists_algebraicDivide,
-  Constructors_UsingDists_algebraicSubtract,
-  Constructors_UsingDists_algebraicLogarithm,
-  Constructors_UsingDists_algebraicExponentiate,
-  Constructors_UsingDists_pointwiseAdd,
-  Constructors_UsingDists_pointwiseMultiply,
-  Constructors_UsingDists_pointwiseDivide,
-  Constructors_UsingDists_pointwiseSubtract,
-  Constructors_UsingDists_pointwiseLogarithm,
-  Constructors_UsingDists_pointwiseExponentiate,
+  Constructors_mean,
+  Constructors_sample,
+  Constructors_pdf,
+  Constructors_cdf,
+  Constructors_inv,
+  Constructors_normalize,
+  Constructors_toPointSet,
+  Constructors_toSampleSet,
+  Constructors_truncate,
+  Constructors_inspect,
+  Constructors_toString,
+  Constructors_toSparkline,
+  Constructors_algebraicAdd,
+  Constructors_algebraicMultiply,
+  Constructors_algebraicDivide,
+  Constructors_algebraicSubtract,
+  Constructors_algebraicLogarithm,
+  Constructors_algebraicExponentiate,
+  Constructors_pointwiseAdd,
+  Constructors_pointwiseMultiply,
+  Constructors_pointwiseDivide,
+  Constructors_pointwiseSubtract,
+  Constructors_pointwiseLogarithm,
+  Constructors_pointwiseExponentiate,
 } from "../rescript/Distributions/DistributionOperation/DistributionOperation.gen";
 
 export let defaultSamplingInputs: SamplingInputs = {
@@ -60,160 +59,172 @@ export function run(
   return runAll(squiggleString, si, env);
 }
 
-class GenericDist {
+export function resultMap(
+  r:
+    | {
+        tag: "Ok";
+        value: any;
+      }
+    | {
+        tag: "Error";
+        value: any;
+      },
+  mapFn: any
+):
+  | {
+      tag: "Ok";
+      value: any;
+    }
+  | {
+      tag: "Error";
+      value: any;
+    } {
+  if (r.tag === "Ok") {
+    return { tag: "Ok", value: mapFn(r.value) };
+  } else {
+    return r;
+  }
+}
+
+export class GenericDist {
   t: genericDist;
   env: env;
 
   constructor(t: genericDist, env: env) {
     this.t = t;
+    this.env = env;
+    return this;
   }
 
-  mean(): resultFloat {
-    return Constructors_UsingDists_mean({ env: this.env }, this.t);
+  mapResultDist(r: resultDist) {
+    return resultMap(r, (v: genericDist) => new GenericDist(v, this.env));
+  }
+
+  mean() {
+    return Constructors_mean({ env: this.env }, this.t);
   }
 
   sample(): resultFloat {
-    return Constructors_UsingDists_sample({ env: this.env }, this.t);
+    return Constructors_sample({ env: this.env }, this.t);
   }
 
   pdf(n: number): resultFloat {
-    return Constructors_UsingDists_pdf({ env: this.env }, this.t, n);
+    return Constructors_pdf({ env: this.env }, this.t, n);
   }
 
   cdf(n: number): resultFloat {
-    return Constructors_UsingDists_cdf({ env: this.env }, this.t, n);
+    return Constructors_cdf({ env: this.env }, this.t, n);
   }
 
   inv(n: number): resultFloat {
-    return Constructors_UsingDists_inv({ env: this.env }, this.t, n);
+    return Constructors_inv({ env: this.env }, this.t, n);
   }
 
-  normalize(): resultDist {
-    return Constructors_UsingDists_normalize({ env: this.env }, this.t);
-  }
-
-  toPointSet(): resultDist {
-    return Constructors_UsingDists_toPointSet({ env: this.env }, this.t);
-  }
-
-  toSampleSet(n: number): resultDist {
-    return Constructors_UsingDists_toSampleSet({ env: this.env }, this.t, n);
-  }
-
-  truncate(left: number, right: number): resultDist {
-    return Constructors_UsingDists_truncate(
-      { env: this.env },
-      this.t,
-      left,
-      right
+  normalize() {
+    return this.mapResultDist(
+      Constructors_normalize({ env: this.env }, this.t)
     );
   }
 
-  inspect(): resultDist {
-    return Constructors_UsingDists_inspect({ env: this.env }, this.t);
+  toPointSet() {
+    return this.mapResultDist(
+      Constructors_toPointSet({ env: this.env }, this.t)
+    );
+  }
+
+  toSampleSet(n: number) {
+    return this.mapResultDist(
+      Constructors_toSampleSet({ env: this.env }, this.t, n)
+    );
+  }
+
+  truncate(left: number, right: number) {
+    return this.mapResultDist(
+      Constructors_truncate({ env: this.env }, this.t, left, right)
+    );
+  }
+
+  inspect() {
+    return this.mapResultDist(Constructors_inspect({ env: this.env }, this.t));
   }
 
   toString(): resultString {
-    return Constructors_UsingDists_toString({ env: this.env }, this.t);
+    return Constructors_toString({ env: this.env }, this.t);
   }
 
   toSparkline(n: number): resultString {
-    return Constructors_UsingDists_toSparkline({ env: this.env }, this.t, n);
+    return Constructors_toSparkline({ env: this.env }, this.t, n);
   }
 
-  algebraicAdd(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicAdd(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicAdd(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicAdd({ env: this.env }, this.t, d2.t)
     );
   }
 
-  algebraicMultiply(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicMultiply(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicMultiply(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicMultiply({ env: this.env }, this.t, d2.t)
     );
   }
 
-  algebraicDivide(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicDivide(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicDivide(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicDivide({ env: this.env }, this.t, d2.t)
     );
   }
 
-  algebraicSubtract(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicSubtract(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicSubtract(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicSubtract({ env: this.env }, this.t, d2.t)
     );
   }
 
-  algebraicLogarithm(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicLogarithm(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicLogarithm(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicLogarithm({ env: this.env }, this.t, d2.t)
     );
   }
 
-  algebraicExponentiate(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_algebraicExponentiate(
-      { env: this.env },
-      this.t,
-      d2.t
+  algebraicExponentiate(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_algebraicExponentiate({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseAdd(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseAdd(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseAdd(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseAdd({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseMultiply(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseMultiply(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseMultiply(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseMultiply({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseDivide(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseDivide(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseDivide(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseDivide({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseSubtract(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseSubtract(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseSubtract(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseSubtract({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseLogarithm(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseLogarithm(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseLogarithm(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseLogarithm({ env: this.env }, this.t, d2.t)
     );
   }
 
-  pointwiseExponentiate(d2: GenericDist): resultDist {
-    return Constructors_UsingDists_pointwiseExponentiate(
-      { env: this.env },
-      this.t,
-      d2.t
+  pointwiseExponentiate(d2: GenericDist) {
+    return this.mapResultDist(
+      Constructors_pointwiseExponentiate({ env: this.env }, this.t, d2.t)
     );
   }
 }

packages/squiggle-lang/src/rescript/Distributions/DistributionOperation/DistributionOperation.res

@@ -187,8 +187,7 @@ module Output = {
 }
 
 module Constructors = {
-  module UsingDists = {
-    module C = GenericDist_Types.Constructors.UsingDists
+    module C = GenericDist_Types.Constructors.UsingDists;
     open OutputLocal
     let mean = (~env, dist) => C.mean(dist)->run(~env)->toFloatR
     let sample = (~env, dist) => C.sample(dist)->run(~env)->toFloatR
@@ -225,5 +224,4 @@ module Constructors = {
       C.pointwiseSubtract(dist1, dist2)->run(~env)->toDistR
     let pointwiseExponentiate = (~env, dist1, dist2) =>
       C.pointwiseSubtract(dist1, dist2)->run(~env)->toDistR
-  }
 }

packages/squiggle-lang/src/rescript/Distributions/DistributionOperation/DistributionOperation.resi

@@ -39,7 +39,6 @@ module Output: {
 }
 
 module Constructors: {
-  module UsingDists: {
     @genType
     let mean: (~env: env, genericDist) => result<float, error>
     @genType
@@ -93,5 +92,4 @@ module Constructors: {
     let pointwiseLogarithm: (~env: env, genericDist, genericDist) => result<genericDist, error>
     @genType
     let pointwiseExponentiate: (~env: env, genericDist, genericDist) => result<genericDist, error>
-  }
 }

packages/squiggle-lang/src/rescript/Distributions/GenericDist/GenericDist.res

@@ -83,8 +83,8 @@ let toPointSet = (
 
 let toSparkline = (t: t, ~sampleCount: int, ~buckets: int=20, unit): result<string, error> =>
   t
-  ->toPointSet(~xSelection=#Linear, ~xyPointLength=buckets, ~sampleCount, ())
-  ->E.R.bind(r => r->PointSetDist.toSparkline->E.R2.errMap(r => Error(GenericDist_Types.Other(r))))
+  ->toPointSet(~xSelection=#Linear, ~xyPointLength=buckets*3, ~sampleCount, ())
+  ->E.R.bind(r => r->PointSetDist.toSparkline(buckets)->E.R2.errMap(r => Error(GenericDist_Types.Other(r))))
 
 module Truncate = {
   let trySymbolicSimplification = (leftCutoff, rightCutoff, t: t): option<t> =>

packages/squiggle-lang/src/rescript/Distributions/GenericDist/GenericDist_Types.res

@@ -102,6 +102,7 @@ module Constructors = {
   type t = Operation.genericFunctionCallInfo
 
   module UsingDists = {
+    @genType
     let mean = (dist): t => FromDist(ToFloat(#Mean), dist)
     let sample = (dist): t => FromDist(ToFloat(#Sample), dist)
     let cdf = (dist, f): t => FromDist(ToFloat(#Cdf(f)), dist)

packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Continuous.res

@@ -249,6 +249,9 @@ module T = Dist({
     )
 })
 
+let downsampleEquallyOverX = (length, t): t =>
+  t |> shapeMap(XYShape.XsConversion.proportionEquallyOverX(length))
+
 /* This simply creates multiple copies of the continuous distribution, scaled and shifted according to
  each discrete data point, and then adds them all together. */
 let combineAlgebraicallyWithDiscrete = (

packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist.res

@@ -203,7 +203,8 @@ let operate = (distToFloatOp: Operation.distToFloatOperation, s): float =>
   | #Mean => T.mean(s)
   }
 
-let toSparkline = (t: t) =>
+let toSparkline = (t: t, n) =>
   T.toContinuous(t)
+  ->E.O2.fmap(Continuous.downsampleEquallyOverX(n))
   ->E.O2.toResult("toContinous Error: Could not convert into continuous distribution")
   ->E.R2.fmap(r => Continuous.getShape(r).ys->Sparklines.create())