Install tape, add basic tests from the SES repo, switch to CommonJS modules temporarily
MODIFY
index.js
index.js
* "https://mail.mozilla.org/pipermail/es-discuss/2013-July/031716.html"
* >Allen Wirfs-Brock's suggested phrasing</a> on es-discuss.
*/
-export function Nat(allegedNum) {
+function Nat(allegedNum) {
// TODO simplify by using Number.isSafeInteger
if (typeof allegedNum !== 'number') {
throw new RangeError('not a number');
@@ -35,3 +35,5 @@ export function Nat(allegedNum) {
if (allegedNum > Number.MAX_SAFE_INTEGER) { throw new RangeError('too big'); }
return allegedNum;
}
+
+module.exports = { Nat };

ADD
package-lock.json
+{
+ "name": "nat",
+ "version": "1.0.0",
+ "lockfileVersion": 1,
+ "requires": true,
+ "dependencies": {
+ "balanced-match": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+ "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+ "dev": true
+ },
+ "brace-expansion": {
+ "version": "1.1.11",
+ "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+ "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+ "dev": true,
+ "requires": {
+ "balanced-match": "^1.0.0",
+ "concat-map": "0.0.1"
+ }
+ },
+ "concat-map": {
+ "version": "0.0.1",
+ "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+ "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+ "dev": true
+ },
+ "deep-equal": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/deep-equal/-/deep-equal-1.0.1.tgz",
+ "integrity": "sha1-9dJgKStmDghO/0zbyfCK0yR0SLU=",
+ "dev": true
+ },
+ "define-properties": {
+ "version": "1.1.3",
+ "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
+ "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
+ "dev": true,
+ "requires": {
+ "object-keys": "^1.0.12"
+ }
+ },
+ "defined": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/defined/-/defined-1.0.0.tgz",
+ "integrity": "sha1-yY2bzvdWdBiOEQlpFRGZ45sfppM=",
+ "dev": true
+ },
+ "es-abstract": {
+ "version": "1.13.0",
+ "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.13.0.tgz",
+ "integrity": "sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==",
+ "dev": true,
+ "requires": {
+ "es-to-primitive": "^1.2.0",
+ "function-bind": "^1.1.1",
+ "has": "^1.0.3",
+ "is-callable": "^1.1.4",
+ "is-regex": "^1.0.4",
+ "object-keys": "^1.0.12"
+ }
+ },
+ "es-to-primitive": {
+ "version": "1.2.0",
+ "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.0.tgz",
+ "integrity": "sha512-qZryBOJjV//LaxLTV6UC//WewneB3LcXOL9NP++ozKVXsIIIpm/2c13UDiD9Jp2eThsecw9m3jPqDwTyobcdbg==",
+ "dev": true,
+ "requires": {
+ "is-callable": "^1.1.4",
+ "is-date-object": "^1.0.1",
+ "is-symbol": "^1.0.2"
+ }
+ },
+ "for-each": {
+ "version": "0.3.3",
+ "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",
+ "integrity": "sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==",
+ "dev": true,
+ "requires": {
+ "is-callable": "^1.1.3"
+ }
+ },
+ "fs.realpath": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+ "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
+ "dev": true
+ },
+ "function-bind": {
+ "version": "1.1.1",
+ "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+ "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
+ "dev": true
+ },
+ "glob": {
+ "version": "7.1.3",
+ "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
+ "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+ "dev": true,
+ "requires": {
+ "fs.realpath": "^1.0.0",
+ "inflight": "^1.0.4",
+ "inherits": "2",
+ "minimatch": "^3.0.4",
+ "once": "^1.3.0",
+ "path-is-absolute": "^1.0.0"
+ }
+ },
+ "has": {
+ "version": "1.0.3",
+ "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
+ "integrity": "sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==",
+ "dev": true,
+ "requires": {
+ "function-bind": "^1.1.1"
+ }
+ },
+ "has-symbols": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.0.tgz",
+ "integrity": "sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q=",
+ "dev": true
+ },
+ "inflight": {
+ "version": "1.0.6",
+ "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+ "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+ "dev": true,
+ "requires": {
+ "once": "^1.3.0",
+ "wrappy": "1"
+ }
+ },
+ "inherits": {
+ "version": "2.0.3",
+ "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+ "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
+ "dev": true
+ },
+ "is-callable": {
+ "version": "1.1.4",
+ "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.4.tgz",
+ "integrity": "sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==",
+ "dev": true
+ },
+ "is-date-object": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
+ "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=",
+ "dev": true
+ },
+ "is-regex": {
+ "version": "1.0.4",
+ "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.4.tgz",
+ "integrity": "sha1-VRdIm1RwkbCTDglWVM7SXul+lJE=",
+ "dev": true,
+ "requires": {
+ "has": "^1.0.1"
+ }
+ },
+ "is-symbol": {
+ "version": "1.0.2",
+ "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.2.tgz",
+ "integrity": "sha512-HS8bZ9ox60yCJLH9snBpIwv9pYUAkcuLhSA1oero1UB5y9aiQpRA8y2ex945AOtCZL1lJDeIk3G5LthswI46Lw==",
+ "dev": true,
+ "requires": {
+ "has-symbols": "^1.0.0"
+ }
+ },
+ "minimatch": {
+ "version": "3.0.4",
+ "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+ "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+ "dev": true,
+ "requires": {
+ "brace-expansion": "^1.1.7"
+ }
+ },
+ "minimist": {
+ "version": "1.2.0",
+ "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+ "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+ "dev": true
+ },
+ "object-inspect": {
+ "version": "1.6.0",
+ "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.6.0.tgz",
+ "integrity": "sha512-GJzfBZ6DgDAmnuaM3104jR4s1Myxr3Y3zfIyN4z3UdqN69oSRacNK8UhnobDdC+7J2AHCjGwxQubNJfE70SXXQ==",
+ "dev": true
+ },
+ "object-keys": {
+ "version": "1.0.12",
+ "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.0.12.tgz",
+ "integrity": "sha512-FTMyFUm2wBcGHnH2eXmz7tC6IwlqQZ6mVZ+6dm6vZ4IQIHjs6FdNsQBuKGPuUUUY6NfJw2PshC08Tn6LzLDOag==",
+ "dev": true
+ },
+ "once": {
+ "version": "1.4.0",
+ "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+ "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+ "dev": true,
+ "requires": {
+ "wrappy": "1"
+ }
+ },
+ "path-is-absolute": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+ "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+ "dev": true
+ },
+ "path-parse": {
+ "version": "1.0.6",
+ "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
+ "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==",
+ "dev": true
+ },
+ "resolve": {
+ "version": "1.7.1",
+ "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.7.1.tgz",
+ "integrity": "sha512-c7rwLofp8g1U+h1KNyHL/jicrKg1Ek4q+Lr33AL65uZTinUZHe30D5HlyN5V9NW0JX1D5dXQ4jqW5l7Sy/kGfw==",
+ "dev": true,
+ "requires": {
+ "path-parse": "^1.0.5"
+ }
+ },
+ "resumer": {
+ "version": "0.0.0",
+ "resolved": "https://registry.npmjs.org/resumer/-/resumer-0.0.0.tgz",
+ "integrity": "sha1-8ej0YeQGS6Oegq883CqMiT0HZ1k=",
+ "dev": true,
+ "requires": {
+ "through": "~2.3.4"
+ }
+ },
+ "string.prototype.trim": {
+ "version": "1.1.2",
+ "resolved": "https://registry.npmjs.org/string.prototype.trim/-/string.prototype.trim-1.1.2.tgz",
+ "integrity": "sha1-0E3iyJ4Tf019IG8Ia17S+ua+jOo=",
+ "dev": true,
+ "requires": {
+ "define-properties": "^1.1.2",
+ "es-abstract": "^1.5.0",
+ "function-bind": "^1.0.2"
+ }
+ },
+ "tape": {
+ "version": "4.9.2",
+ "resolved": "https://registry.npmjs.org/tape/-/tape-4.9.2.tgz",
+ "integrity": "sha512-lPXKRKILZ1kZaUy5ynWKs8ATGSUO7HAFHCFnBam6FaGSqPdOwMWbxXHq4EXFLE8WRTleo/YOMXkaUTRmTB1Fiw==",
+ "dev": true,
+ "requires": {
+ "deep-equal": "~1.0.1",
+ "defined": "~1.0.0",
+ "for-each": "~0.3.3",
+ "function-bind": "~1.1.1",
+ "glob": "~7.1.2",
+ "has": "~1.0.3",
+ "inherits": "~2.0.3",
+ "minimist": "~1.2.0",
+ "object-inspect": "~1.6.0",
+ "resolve": "~1.7.1",
+ "resumer": "~0.0.0",
+ "string.prototype.trim": "~1.1.2",
+ "through": "~2.3.8"
+ }
+ },
+ "through": {
+ "version": "2.3.8",
+ "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+ "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
+ "dev": true
+ },
+ "wrappy": {
+ "version": "1.0.2",
+ "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+ "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+ "dev": true
+ }
+ }
+}

MODIFY
package.json
package.json
"bugs": {
"url": "https://github.com/Agoric/Nat/issues"
},
- "homepage": "https://github.com/Agoric/Nat#readme"
+ "homepage": "https://github.com/Agoric/Nat#readme",
+ "dependencies": {},
+ "devDependencies": {
+ "tape": "^4.9.2"
+ }
}

ADD
test/test.js
+const test = require('tape');
+const { Nat } = require('../index.js');
+
+test('Nat() throws when not a natural number', function (t) {
+ t.equal(Nat(0), 0);
+ t.equal(Nat(1), 1);
+ t.equal(Nat(999), 999);
+ t.throws(() => Nat("not a number"), RangeError);
+ t.throws(() => Nat(-1), RangeError);
+ t.throws(() => Nat(0.5), RangeError);
+ t.throws(() => Nat(2**60), RangeError);
+ t.throws(() => Nat(NaN), RangeError);
+ t.end();
+});

Install tape, add basic tests from the SES repo, switch to CommonJS modules temporarily