87 lines
3.3 KiB
TypeScript
87 lines
3.3 KiB
TypeScript
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// Sequential: mutates process-global state — process.env.COLUMNS/LINES and
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// process.stdout/process.stderr columns+rows. The terminal-size package (used by
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// resolveSize's fallback) reads these globals directly, so a concurrent sibling
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// would perturb the result. Tests restore every mutated prop in a finally block.
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import { PassThrough } from "node:stream";
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import process from "node:process";
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import { defineComponent } from "vue";
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import { expect, test } from "vite-plus/test";
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import { createApp, Text, useTerminalSize } from "@vue-tui/runtime";
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function makeTtyStream(columns: number): NodeJS.WriteStream {
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const s = new PassThrough() as unknown as NodeJS.WriteStream;
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// Deliberately no `rows` — forces resolveSize() into the terminal-size fallback.
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Object.assign(s, { columns, isTTY: true });
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return s;
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}
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function makeFakeStdin(): NodeJS.ReadStream {
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const s = new PassThrough() as unknown as NodeJS.ReadStream;
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Object.assign(s, {
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isTTY: true,
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setRawMode() {
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return s;
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},
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setEncoding() {
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return s;
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},
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});
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(s as unknown as { ref: () => void }).ref = () => {};
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(s as unknown as { unref: () => void }).unref = () => {};
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return s;
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}
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// Mirrors Ink terminal-resize.tsx:110-152 ("falls back to terminal-size rows
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// when stdout.rows is missing"). With the mount stdout reporting columns 0 and
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// no rows, resolveSize() calls terminal-size, which — after we zero out the real
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// process.stdout/stderr dimensions — resolves rows from process.env.LINES.
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test.sequential("useTerminalSize falls back to terminal-size rows from env.LINES when stdout.rows is missing", async () => {
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const stdout = makeTtyStream(0);
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const stderr = makeTtyStream(0);
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const stdin = makeFakeStdin();
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const originalColumns = process.env.COLUMNS;
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const originalLines = process.env.LINES;
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const originalStdoutColumns = process.stdout.columns;
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const originalStdoutRows = process.stdout.rows;
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const originalStderrColumns = process.stderr.columns;
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const originalStderrRows = process.stderr.rows;
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let capturedRows = -1;
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const App = defineComponent(() => {
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const { rows } = useTerminalSize();
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capturedRows = rows.value;
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return () => <Text>{String(rows.value)}</Text>;
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});
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const app = createApp(App);
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try {
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// terminal-size prefers process.stdout/stderr dimensions, then env.
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// Zero the real streams so env.COLUMNS/LINES is the winning source.
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process.env.COLUMNS = "123";
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process.env.LINES = "45";
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process.stdout.columns = 0;
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process.stdout.rows = 0;
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process.stderr.columns = 0;
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process.stderr.rows = 0;
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app.mount({ stdout, stdin, stderr, debug: true, exitOnCtrlC: false });
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await new Promise<void>((r) => setTimeout(r, 60));
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expect(capturedRows).toBe(45);
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} finally {
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app.unmount();
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// Restore env precisely: a var that was ABSENT must be DELETED, not set to
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// the string "undefined" (which would pollute later tests' CI/size detection).
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if (originalColumns === undefined) delete process.env.COLUMNS;
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else process.env.COLUMNS = originalColumns;
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if (originalLines === undefined) delete process.env.LINES;
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else process.env.LINES = originalLines;
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process.stdout.columns = originalStdoutColumns;
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process.stdout.rows = originalStdoutRows;
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process.stderr.columns = originalStderrColumns;
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process.stderr.rows = originalStderrRows;
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}
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});
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