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@decentral.ee/web3-helpers

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Helpers for web3 development.

github.com/decentral-ee/web3-test-helpers

decentral-ee/web3-test-helpers

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const { round, fromDecimals, toDecimals, wad4human, toWad, toBN } = require(".."); describe("math-utils", () => { it("round", () => { // default 2 decimals assert.equal(round(2.322222), 2.32); assert.equal(round(0.00000000008), 0); assert.equal(round("2.322222"), 2.32); assert.equal(round("2.322"), 2.32); assert.equal(round("2.322", 3), 2.322); assert.equal(round("2.325555"), 2.33); assert.equal(round("2.325555"), 2.33); assert.equal(round("2.325555", 3), 2.326); assert.equal(round("-2.322222"), -2.32); assert.equal(round("-2.325555"), -2.33); }); it("fromDecimals", () => { assert.equal(fromDecimals("1234567", 3), "1234.567"); assert.equal(fromDecimals("1234560", 3), "1234.56"); assert.equal(fromDecimals("1234560.2", 3), "1234.56"); assert.equal(fromDecimals("1234560", 3), "1234.56"); assert.equal(fromDecimals("1234560.2", 3, { truncate: false } ), "1234.5602"); assert.equal(fromDecimals("-1234567", 3), "-1234.567"); assert.equal(fromDecimals("-1234560", 3), "-1234.56"); assert.equal(fromDecimals("-1234560.2", 3), "-1234.56"); assert.equal(fromDecimals("-1234560.2", 3, { truncate: false } ), "-1234.5602"); assert.equal(fromDecimals("2", 3, { truncate: false } ), "0.002"); assert.equal(fromDecimals("-2", 3, { truncate: false } ), "-0.002"); assert.equal(fromDecimals(".2", 3, { truncate: false } ), "0.0002"); assert.equal(fromDecimals("-.2", 3, { truncate: false } ), "-0.0002"); assert.equal(fromDecimals("0.2", 3, { truncate: false } ), "0.0002"); assert.equal(fromDecimals("-0.2", 3, { truncate: false } ), "-0.0002"); assert.equal(fromDecimals("0.2", 3), "0"); assert.equal(fromDecimals("-0.2", 3), "-0"); }); it("toDecimals", () => { // not a good idea to use number type, but it's supported assert.equal(toDecimals(0.0000008, 18), "799999999999"); assert.equal(toDecimals(1234.567, 3), "1234567"); assert.equal(toDecimals(-1234.567, 3), "-1234567"); assert.equal(toDecimals("0.0000008", 18), "800000000000"); assert.equal(toDecimals(".34", 3), "340"); assert.equal(toDecimals("1234.567", 3), "1234567"); assert.equal(toDecimals("1234.56", 3), "1234560"); assert.equal(toDecimals("1234.5602", 3), "1234560"); assert.equal(toDecimals("1234.5602", 3, { truncate: false }), "1234560.2"); assert.equal(toDecimals("-1234.567", 3), "-1234567"); assert.equal(toDecimals("-1234.56", 3), "-1234560"); assert.equal(toDecimals("-1234.5602", 3), "-1234560"); assert.equal(toDecimals("-1234.5602", 3, { truncate: false }), "-1234560.2"); }); it("wad4human", () => { assert.equal(wad4human("1234567901234567890123456789"), "1234567901.23457"); assert.equal(wad4human("1234567901234567890123456789", 2), "1234567901.23"); assert.equal(wad4human("1234567901234567890123456789", 3), "1234567901.235"); assert.equal(wad4human("1234567901000000000000000000", 3), "1234567901.000"); assert.equal(wad4human("1234567901999999999999999999", 3), "1234567902.000"); assert.equal(wad4human("-1234567901234567890123456789"), "-1234567901.23457"); assert.equal(wad4human("-1234567901234567890123456789", 3), "-1234567901.235"); assert.equal(wad4human("-1234567901230000000000000000", 3), "-1234567901.230"); // unsupported case // assert.equal(wad4human("12345679012345678901234567891234567901234567890123456789", 3), "12345679012345678901234567891234567901.235"); }); it("toWad", () => { assert.equal(toWad("1234567901.23457").toString(), "1234567901234570000000000000"); assert.equal(toWad("-1234567901.23457").toString(), "-1234567901234570000000000000"); }); it("toBN", () => { assert.equal(toBN(2).toString(), "2"); }); });