pretty-japanese-yen/spec/pretty-japanese-yen-spec.js

convert number to japanese yen string

describe("prettyJapaneseYen", function() {
  var prettyJapaneseYen = require("../lib/pretty-japanese-yen");

  it("works for numbers in range 0..999", function() {
    expect(prettyJapaneseYen(0)).toEqual("0円");
    expect(prettyJapaneseYen(500)).toEqual("500円");
    expect(prettyJapaneseYen(999)).toEqual("999円");
  });

  it("works for numbers in range 1,000..9,999", function() {
    expect(prettyJapaneseYen(1000)).toEqual("1千円");
    expect(prettyJapaneseYen(1550)).toEqual("1.5千円");
    expect(prettyJapaneseYen(9999)).toEqual("9.9千円");
  });

  it("works for numbers in range 10,000..999,999", function() {
    expect(prettyJapaneseYen(10000)).toEqual("1万円");
    expect(prettyJapaneseYen(15500)).toEqual("1.5万円");
    expect(prettyJapaneseYen(999999)).toEqual("99.9万円");
  });

  it("works for numbers in range 100,000,000..9,999,999,999", function() {
    expect(prettyJapaneseYen(100000000)).toEqual("1億円");
    expect(prettyJapaneseYen(155000000)).toEqual("1.5億円");
    expect(prettyJapaneseYen(9999999999)).toEqual("99.9億円");
  });

  it("works for numbers above 10,000,000,000", function() {
    expect(prettyJapaneseYen(10000000000)).toEqual("100億円");
    expect(prettyJapaneseYen(100000000000)).toEqual("1000億円");
    expect(prettyJapaneseYen(1000000000000)).toEqual("10000億円");
  });

  it("works for strings", function() {
    expect(prettyJapaneseYen("0")).toEqual("0円");
    expect(prettyJapaneseYen("500")).toEqual("500円");
    expect(prettyJapaneseYen("999")).toEqual("999円");
    expect(prettyJapaneseYen("100000000")).toEqual("1億円");
    expect(prettyJapaneseYen("155000000")).toEqual("1.5億円");
    expect(prettyJapaneseYen("9999999999")).toEqual("99.9億円");
  });

  it("works for negative numbers", function() {
    expect(prettyJapaneseYen(-1)).toEqual("-1円");
    expect(prettyJapaneseYen(-500)).toEqual("-500円");
    expect(prettyJapaneseYen(-999)).toEqual("-999円");
  });

  it("sets the correct unit", function() {
    expect(prettyJapaneseYen(500, "枚")).toEqual("500枚");
    expect(prettyJapaneseYen(1000, "枚")).toEqual("1千枚");
    expect(prettyJapaneseYen(10000, "枚")).toEqual("1万枚");
    expect(prettyJapaneseYen(100000000, "枚")).toEqual("1億枚");
    expect(prettyJapaneseYen(10000000000, "枚")).toEqual("100億枚");
  });
});