32 lines
1.5 KiB
TypeScript
32 lines
1.5 KiB
TypeScript
 
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import { describe, expect, it } from "vitest";
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import { EditorState, Text } from "@codemirror/state";
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import { highlightExtension, highlightLineField, lineRangeToPositions, setHighlight } from "./highlightLine";
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describe("lineRangeToPositions", () => {
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const doc = Text.of(["one", "two", "three"]);
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it("maps 1-based inclusive lines to document offsets", () => {
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expect(lineRangeToPositions(doc, 2, 2)).toEqual({ from: 4, to: 4 });
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expect(lineRangeToPositions(doc, 1, 3)).toEqual({ from: 0, to: 8 });
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});
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it("clamps past the end and refuses nonsense", () => {
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expect(lineRangeToPositions(doc, 2, 99)).toEqual({ from: 4, to: 8 });
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expect(lineRangeToPositions(doc, 99, 100)).toEqual({ from: 8, to: 8 });
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expect(lineRangeToPositions(doc, 0, 1)).toEqual({ from: 0, to: 0 });
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expect(lineRangeToPositions(doc, 3, 1)).toEqual({ from: 8, to: 8 });
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});
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});
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describe("highlightLineField", () => {
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it("decorates every line in the range and clears on null", () => {
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let state = EditorState.create({ doc: "a\nb\nc\nd", extensions: [highlightExtension()] });
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state = state.update({ effects: setHighlight.of({ from: 2, to: 3 }) }).state;
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let count = 0;
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state.field(highlightLineField).between(0, state.doc.length, () => { count++; });
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expect(count).toBe(2);
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state = state.update({ effects: setHighlight.of(null) }).state;
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count = 0;
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state.field(highlightLineField).between(0, state.doc.length, () => { count++; });
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expect(count).toBe(0);
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});
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});
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