alexion
6081e3e325
Imported as a linear vendor commit so forge rebases do not replay the upstream root tree. git-subtree-dir: third_party/pi git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0
27 lines
1.0 KiB
TypeScript
27 lines
1.0 KiB
TypeScript
import assert from "node:assert";
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import { describe, it } from "node:test";
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import { visibleWidth } from "../src/utils.ts";
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describe("visibleWidth", () => {
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it("measures styled ASCII without counting escape sequences", () => {
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assert.strictEqual(visibleWidth("\x1b[38;5;4mhello\x1b[39m world"), 11);
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assert.strictEqual(visibleWidth("\x1b]8;;https://example.com\x07link\x1b]8;;\x07"), 4);
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assert.strictEqual(visibleWidth("\x1b]133;A\x1b\\prompt"), 6);
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assert.strictEqual(visibleWidth("\x1b_pi:c\x07cursor"), 6);
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});
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it("counts tabs as three columns in styled text", () => {
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assert.strictEqual(visibleWidth("\x1b[1ma\tb\x1b[22m"), 5);
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});
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it("measures styled non-ASCII text", () => {
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assert.strictEqual(visibleWidth("\x1b[31m日本\x1b[39m ok"), 7);
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assert.strictEqual(visibleWidth("\x1b[31m─→\x1b[39m"), 2);
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});
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it("treats unterminated escape sequences as zero-width control characters", () => {
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assert.strictEqual(visibleWidth("\x1b[31"), 3);
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assert.strictEqual(visibleWidth("a\x1b"), 1);
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});
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});
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