(prng) test coverage

prng.js

@@ -30,7 +30,7 @@ export const DefaultPRNG = Xoroshiro128plus
  * @param {number} seed A positive 32bit integer. Do not use negative numbers.
  * @return {PRNG}
  */
-export const create = seed => new DefaultPRNG(Math.floor(seed < 1 ? seed * binary.BITS32 : seed))
+export const create = seed => new DefaultPRNG(seed)
 
 /**
  * Generates a single random bool.
@@ -82,14 +82,6 @@ export const int31 = (gen, min, max) => {
   return math.floor((gen.next() * (_max + 1 - _min)) + _min)
 }
 
-/**
- * Generates a random real on [0, 1) with 32 bit resolution.
- *
- * @param {PRNG} gen A random number generator.
- * @return {Number} A random real number on [0, 1).
- */
-export const real32 = gen => gen.next()
-
 /**
  * Generates a random real on [0, 1) with 53 bit resolution.
  *

prng.test.js

@@ -106,14 +106,15 @@ const runGenTest = (tc, gen) => {
 
   t.group('uint53 - generates integer exceeding 32 bits', () => {
     let largest = 0
-    let smallest = 0
+    let smallest = 10000
     let i
     let newNum
     for (i = 0; i < genTestData; i++) {
       newNum = prng.uint53(gen, 0, Number.MAX_SAFE_INTEGER)
       if (newNum > largest) {
         largest = newNum
       }
+      /* istanbul ignore if */
       if (newNum < smallest) {
         smallest = newNum
       }
@@ -175,6 +176,7 @@ export const testGeneratorXoroshiro128plus = tc => runGenTest(tc, new Xoroshiro1
 export const testGeneratorXorshift32 = tc => runGenTest(tc, new Xorshift32(tc.seed))
 export const testGeneratorMt19937 = tc => runGenTest(tc, new Mt19937(tc.seed))
 
+/* istanbul ignore next */
 /**
  * @param {prng.PRNG} gen
  * @param {t.TestCase} tc
@@ -195,6 +197,7 @@ const printDistribution = (gen, tc) => {
   t.printCanvas(canvas, DIAMETER)
 }
 
+/* istanbul ignore next */
 export const testNumberDistributions = tc => {
   t.skip(!isBrowser)
   t.group('Xoroshiro128plus', () => printDistribution(new Xoroshiro128plus(tc.seed), tc))