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master @ 48 LINES
 
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import { describe, expect, it } from "vitest";
import { buildBarChart } from "./BarChart";
import { len } from "../../lib/ascii";

const items = [
  { label: "NIXOS", value: 12 },
  { label: "WINDOWS-TROUBLESHOOTING", value: 3 },
  { label: "EMPTY", value: 0 },
];

describe("buildBarChart", () => {
  it("renders every row at the exact width", () => {
    for (const w of [86, 48]) {
      for (const line of buildBarChart(items, w).split("\n")) {
        expect(len(line)).toBe(w);
      }
    }
  });

  it("fills the largest value to the full bar and zero to none", () => {
    const [top, , zero] = buildBarChart(items, 48).split("\n");
    expect(top).not.toContain("░");
    expect(zero).not.toContain("█");
  });

  it("truncates long labels with an ellipsis", () => {
    const lines = buildBarChart(items, 48).split("\n");
    expect(lines[1]).toContain("WINDOWS-T...");
  });

  it("right-aligns values", () => {
    const lines = buildBarChart(items, 48).split("\n");
    expect(lines[0].endsWith("12")).toBe(true);
    expect(lines[2].endsWith(" 0")).toBe(true);
  });

  it("scales against an explicit max", () => {
    const line = buildBarChart([{ label: "HALF", value: 5 }], 48, { max: 10 });
    const filled = [...line].filter((c) => c === "█").length;
    const track = [...line].filter((c) => c === "░").length;
    expect(Math.abs(filled - track)).toBeLessThanOrEqual(1);
  });

  it("returns empty for no items", () => {
    expect(buildBarChart([], 48)).toBe("");
  });
});


import { describe, expect, it } from "vitest
";
import { buildBarChart } from "./BarChart";
import { len } from "../../lib/ascii";

const items = [
  { label: "NIXOS", value: 12 },
  { label: "WINDOWS-TROUBLESHOOTING", value:
 3 },
  { label: "EMPTY", value: 0 },
];

describe("buildBarChart", () => {
  it("renders every row at the exact width",
 () => {
    for (const w of [86, 48]) {
      for (const line of buildBarChart(items
, w).split("\n")) {
        expect(len(line)).toBe(w);
      }
    }
  });

  it("fills the largest value to the full ba
r and zero to none", () => {
    const [top, , zero] = buildBarChart(item
s, 48).split("\n");
    expect(top).not.toContain("░");
    expect(zero).not.toContain("█");
  });

  it("truncates long labels with an ellipsis
", () => {
    const lines = buildBarChart(items, 48).s
plit("\n");
    expect(lines[1]).toContain("WINDOWS-T...
");
  });

  it("right-aligns values", () => {
    const lines = buildBarChart(items, 48).s
plit("\n");
    expect(lines[0].endsWith("12")).toBe(tru
e);
    expect(lines[2].endsWith(" 0")).toBe(tru
e);
  });

  it("scales against an explicit max", () =>
 {
    const line = buildBarChart([{ label: "HA
LF", value: 5 }], 48, { max: 10 });
    const filled = [...line].filter((c) => c
 === "█").length;
    const track = [...line].filter((c) => c 
=== "░").length;
    expect(Math.abs(filled - track)).toBeLes
sThanOrEqual(1);
  });

  it("returns empty for no items", () => {
    expect(buildBarChart([], 48)).toBe("");
  });
});

 
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