66 lines
2.1 KiB
TypeScript
66 lines
2.1 KiB
TypeScript
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import { describe, it, expect } from "vitest";
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import { trimSelection } from "./trimSelection";
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describe("trimSelection", () => {
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it("returns empty string unchanged", () => {
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expect(trimSelection("")).toBe("");
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});
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it("trims leading and trailing whitespace on a single line", () => {
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expect(trimSelection(" hello ")).toBe("hello");
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});
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it("dedents common leading whitespace while preserving inner indent", () => {
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const input = " def foo():\n return 1\n";
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expect(trimSelection(input)).toBe("def foo():\n return 1");
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});
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it("strips leading and trailing blank lines", () => {
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const input = "\n\n hello\n\n";
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expect(trimSelection(input)).toBe("hello");
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});
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it("preserves interior blank lines", () => {
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const input = " line1\n\n line2";
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expect(trimSelection(input)).toBe("line1\n\nline2");
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});
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it("is idempotent on already-clean text", () => {
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const clean = "def foo():\n return 1";
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expect(trimSelection(clean)).toBe(clean);
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expect(trimSelection(trimSelection(clean))).toBe(clean);
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});
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it("ignores blank lines when computing the common indent", () => {
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// The blank line has 0 leading whitespace but shouldn't force minIndent to 0.
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const input = " a\n\n b";
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expect(trimSelection(input)).toBe("a\n\nb");
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});
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it("strips trailing whitespace per line", () => {
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const input = "alpha \nbeta\t\t\ngamma";
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expect(trimSelection(input)).toBe("alpha\nbeta\ngamma");
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});
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it("handles mixed-width padding (pads to min)", () => {
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const input = " one\n two\n three";
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// minIndent = 2
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expect(trimSelection(input)).toBe(" one\ntwo\n three");
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});
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it("handles tabs as leading whitespace", () => {
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const input = "\tfoo\n\t\tbar";
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// minIndent = 1 tab
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expect(trimSelection(input)).toBe("foo\n\tbar");
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});
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it("returns empty when input is only whitespace", () => {
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expect(trimSelection(" \n \n")).toBe("");
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});
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it("leaves a zero-indent line alone (no false dedent)", () => {
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const input = "no-indent\n indented";
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expect(trimSelection(input)).toBe("no-indent\n indented");
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});
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});
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