[READ-ONLY] Mirror of https://github.com/bombshell-dev/tty. Platform independent 2D layout engine for terminal applications based on Clay
test: failing repro for color-encoding-modes
Nate Moore
(Jun 4, 2026, 12:51 AM -0500)
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test/color-encoding-modes.test.ts
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test/color-encoding-modes.test.ts
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import { describe, expect, it } from "./suite.ts";
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import { createTerm } from "../term.ts";
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import { close, grow, open, rgba, text } from "../ops.ts";
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const decode = (b: Uint8Array) => new TextDecoder().decode(b);
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describe("color encoding modes", () => {
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it("16-color mode downgrades standard red foreground to 4-bit", async () => {
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let term = await createTerm({ width: 4, height: 1 });
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let ansi = decode(
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term.render([
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open("root", { layout: { width: grow(), height: grow() } }),
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text("X", { color: rgba(255, 0, 0) }),
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close(),
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// deno-lint-ignore no-explicit-any
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], { colorMode: "16" } as any).output,
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);
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let before = ansi.slice(0, ansi.indexOf("X"));
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// pins: standard-palette red maps to 4-bit \x1b[31m under colorMode:"16"
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expect(before).toContain("\x1b[31m");
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// pins: the 24-bit sequence must not survive the downgrade
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expect(before).not.toContain("\x1b[38;2;255;0;0");
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});
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it("256-color mode downgrades standard red foreground to a palette index", async () => {
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let term = await createTerm({ width: 4, height: 1 });
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let ansi = decode(
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term.render([
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open("root", { layout: { width: grow(), height: grow() } }),
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text("X", { color: rgba(255, 0, 0) }),
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close(),
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// deno-lint-ignore no-explicit-any
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], { colorMode: "256" } as any).output,
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);
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let before = ansi.slice(0, ansi.indexOf("X"));
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// pins: standard-palette red maps to index 1 (\x1b[38;5;1m) under colorMode:"256"
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expect(before).toContain("\x1b[38;5;1m");
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});
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});