105 lines
2.7 KiB
JavaScript
105 lines
2.7 KiB
JavaScript
"use strict";
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const { compareLocations } = require("../lib/util/comparators");
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const createPosition = overrides => {
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return {
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line: 10,
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column: 5,
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...overrides
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};
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};
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const createLocation = (start, end, index) => {
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return {
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start: createPosition(start),
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end: createPosition(end),
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index: index || 3
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};
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};
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describe("compareLocations", () => {
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describe("object location comparison", () => {
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let a, b;
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describe("location line number", () => {
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beforeEach(() => {
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a = createLocation({
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line: 10
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});
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b = createLocation({
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line: 20
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});
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});
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it("returns -1 when the first location line number comes before the second location line number", () => {
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expect(compareLocations(a, b)).toBe(-1);
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});
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it("returns 1 when the first location line number comes after the second location line number", () => {
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expect(compareLocations(b, a)).toBe(1);
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});
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});
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describe("location column number", () => {
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beforeEach(() => {
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a = createLocation({
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column: 10
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});
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b = createLocation({
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column: 20
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});
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});
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it("returns -1 when the first location column number comes before the second location column number", () => {
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expect(compareLocations(a, b)).toBe(-1);
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});
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it("returns 1 when the first location column number comes after the second location column number", () => {
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expect(compareLocations(b, a)).toBe(1);
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});
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});
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describe("location index number", () => {
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beforeEach(() => {
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a = createLocation(null, null, 10);
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b = createLocation(null, null, 20);
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});
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it("returns -1 when the first location index number comes before the second location index number", () => {
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expect(compareLocations(a, b)).toBe(-1);
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});
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it("returns 1 when the first location index number comes after the second location index number", () => {
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expect(compareLocations(b, a)).toBe(1);
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});
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});
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describe("same location", () => {
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beforeEach(() => {
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a = createLocation();
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b = createLocation();
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});
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it("returns 0", () => {
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expect(compareLocations(a, b)).toBe(0);
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});
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});
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});
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describe("unknown location type comparison", () => {
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it("returns 1 when the first parameter is an object and the second parameter is not", () => {
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expect(compareLocations(createLocation(), 123)).toBe(1);
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expect(compareLocations(createLocation(), "alpha")).toBe(1);
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});
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it("returns -1 when the first parameter is not an object and the second parameter is", () => {
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expect(compareLocations(123, createLocation())).toBe(-1);
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expect(compareLocations("alpha", createLocation())).toBe(-1);
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});
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it("returns 0 when both the first parameter and the second parameter are not objects", () => {
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expect(compareLocations(123, 456)).toBe(0);
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});
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});
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});
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