import { AnsiColorMode, AnsiTerminalDisplay } from "./ansi.ts"; import { Buffer, describe, expect, it } from "./deps.testing.ts"; function createTestDisplay(): { stdout: Buffer; stdin: Buffer; display: AnsiTerminalDisplay; } { const stdout = new Buffer(); const stdin = new Buffer(); const display = new AnsiTerminalDisplay(stdout, stdin); return { stdout, stdin, display }; } describe(AnsiTerminalDisplay, () => { it("clears the screen on init", async () => { const { stdout, display } = createTestDisplay(); await display.init(); checkSequence(stdout, "![2J"); await display.uninit(); checkSequence(stdout, "![2J![2J"); }); it("writes truecolor characters", async () => { const { stdout, display } = createTestDisplay(); await display.setupPalette([ { r: 0.0, g: 0.0, b: 0.0 }, { r: 0.5, g: 0.1, b: 1.0 }, ], AnsiColorMode.TRUECOLOR); await display.setChar({ x: 0, y: 0 }, { ch: "$", fg: 1, bg: 0 }); checkSequence(stdout, "![38;2;128;26;255m![48;2;0;0;0m![1;1H$"); }); it("falls back to 256 colors", async () => { const { stdout, display } = createTestDisplay(); const palette = await display.setupPalette([ { r: 0.0, g: 0.0, b: 0.0 }, ], AnsiColorMode.COLORS256); await display.setChar({ x: 0, y: 0 }, { ch: "a", fg: 0, bg: 1 }); await display.setChar({ x: 0, y: 0 }, { ch: "b", fg: 2, bg: 3 }); checkSequence(stdout, "![38;5;0m![48;5;1m![1;1Ha![38;5;2m![48;5;3m![1;1Hb"); expect(palette[0]).toEqual({ r: 0, g: 0, b: 0 }); expect(palette[3]).toEqual({ r: 0.5, g: 0.5, b: 0 }); expect(palette[14]).toEqual({ r: 0, g: 1, b: 1 }); expect(palette[67]).toEqual({ r: 0.2, g: 0.4, b: 0.6 }); expect(palette[234]).toEqual({ r: 0.12, g: 0.12, b: 0.12 }); }); it("moves the cursor only when needed", async () => { const { stdout, display } = createTestDisplay(); display.forceSize({ w: 4, h: 3 }); await display.setChar({ x: 0, y: 0 }, { ch: "a", fg: 0, bg: 0 }); await display.setChar({ x: 1, y: 0 }, { ch: "b", fg: 0, bg: 0 }); await display.setChar({ x: 3, y: 0 }, { ch: "c", fg: 0, bg: 0 }); await display.setChar({ x: 0, y: 1 }, { ch: "d", fg: 0, bg: 0 }); await display.setChar({ x: 0, y: 2 }, { ch: "e", fg: 0, bg: 0 }); checkSequence(stdout, "![1;1Hab![1;4Hcd![3;1He"); }); it("changes colors only when needed", async () => { const { stdout, display } = createTestDisplay(); display.forceSize({ w: 10, h: 1 }); await display.setupPalette([ { r: 0.0, g: 0.0, b: 0.0 }, ], AnsiColorMode.COLORS256); await display.setChar({ x: 0, y: 0 }, { ch: "a", fg: 1, bg: 0 }); await display.setChar({ x: 1, y: 0 }, { ch: "b", fg: 1, bg: 0 }); await display.setChar({ x: 2, y: 0 }, { ch: "c", fg: 2, bg: 0 }); await display.setChar({ x: 3, y: 0 }, { ch: "d", fg: 0, bg: 2 }); await display.setChar({ x: 4, y: 0 }, { ch: "e", fg: 0, bg: 2 }); await display.setChar({ x: 5, y: 0 }, { ch: "f", fg: 0, bg: 3 }); checkSequence( stdout, "![38;5;1m![48;5;0m![1;1Hab![38;5;2mc![38;5;0m![48;5;2mde![48;5;3mf", ); }); }); function checkSequence(buffer: Buffer, expected: string) { const decoded = new TextDecoder().decode( buffer.bytes().map((x) => x == 0x1B ? 0x21 : x), ); expect(decoded).toEqual(expected); }