squiggle/packages/squiggle-lang/__tests__/GenericDist/GenericOperation__Test.res

76 lines
2.3 KiB
Plaintext
Raw Normal View History

2022-03-28 19:14:39 +00:00
open Jest
open Expect
let params: GenericDist_GenericOperation.params = {
sampleCount: 100,
xyPointLength: 100,
}
let normalDist: GenericDist_Types.genericDist = #Symbolic(#Normal({mean: 5.0, stdev: 2.0}))
let normalDist10: GenericDist_Types.genericDist = #Symbolic(#Normal({mean: 10.0, stdev: 2.0}))
let normalDist20: GenericDist_Types.genericDist = #Symbolic(#Normal({mean: 20.0, stdev: 2.0}))
let uniformDist: GenericDist_Types.genericDist = #Symbolic(#Uniform({low: 9.0, high: 10.0}))
let {toFloat, toDist, toString, toError} = module(GenericDist_GenericOperation.Output)
let {run, fmap} = module(GenericDist_GenericOperation)
let run = run(params)
let fmap = fmap(params)
let toExt: option<'a> => 'a = E.O.toExt(
"Should be impossible to reach (This error is in test file)",
)
describe("normalize", () => {
test("has no impact on normal dist", () => {
let result = run(#fromDist(#toDist(#normalize), normalDist))
expect(result)->toEqual(#Dist(normalDist))
})
})
describe("mean", () => {
test("for a normal distribution", () => {
let result = GenericDist_GenericOperation.run(params, #fromDist(#toFloat(#Mean), normalDist))
expect(result)->toEqual(#Float(5.0))
})
})
describe("mixture", () => {
test("on two normal distributions", () => {
let result =
run(#mixture([(normalDist10, 0.5), (normalDist20, 0.5)]))
->fmap(#fromDist(#toFloat(#Mean)))
->toFloat
->toExt
2022-03-28 19:14:39 +00:00
expect(result)->toBeCloseTo(15.28)
})
})
describe("toPointSet", () => {
test("on symbolic normal distribution", () => {
let result =
run(#fromDist(#toDist(#toPointSet), normalDist))
->fmap(#fromDist(#toFloat(#Mean)))
->toFloat
->toExt
2022-03-28 19:14:39 +00:00
expect(result)->toBeCloseTo(5.09)
})
test("on sample set distribution with under 4 points", () => {
let result =
run(#fromDist(#toDist(#toPointSet), #SampleSet([0.0, 1.0, 2.0, 3.0])))->fmap(
2022-03-28 19:14:39 +00:00
#fromDist(#toFloat(#Mean)),
)
2022-03-30 01:28:14 +00:00
expect(result)->toEqual(#GenDistError(Other("Converting sampleSet to pointSet failed")))
2022-03-28 19:14:39 +00:00
})
2022-03-28 20:52:04 +00:00
test("on sample set", () => {
2022-03-28 19:14:39 +00:00
let result =
run(#fromDist(#toDist(#toPointSet), normalDist))
->fmap(#fromDist(#toDist(#toSampleSet(1000))))
->fmap(#fromDist(#toDist(#toPointSet)))
->fmap(#fromDist(#toFloat(#Mean)))
->toFloat
->toExt
2022-03-28 19:14:39 +00:00
expect(result)->toBeCloseTo(5.09)
})
})