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sokrasokra
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Merge pull request webpack#3670 from alistairjcbrown/add-compare-locations-tests
Add tests for compareLocations
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‎test/compareLocations.test.js‎

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var should = require("should");
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var compareLocations = require("../lib/compareLocations");
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var createLocation = function(overides) {
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return Object.assign({
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line: 10,
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column: 5,
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index: 3
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}, overides);
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};
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describe('compareLocations', function() {
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describe('string location comparison', function() {
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it('returns -1 when the first string comes before the second string', function() {
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compareLocations('alpha', 'beta').should.be.exactly(-1);
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});
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it('returns 1 when the first string comes after the second string', function() {
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compareLocations('beta', 'alpha').should.be.exactly(1);
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});
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it('returns 0 when the first string is the same as the second string', function() {
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compareLocations('charlie', 'charlie').should.be.exactly(0);
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});
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});
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describe('object location comparison', function() {
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var a, b;
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describe('location line number', function() {
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beforeEach(function() {
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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', function() {
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compareLocations(a, b).should.be.exactly(-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', function() {
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compareLocations(b, a).should.be.exactly(1);
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});
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});
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describe('location column number', function() {
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beforeEach(function() {
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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', function() {
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compareLocations(a, b).should.be.exactly(-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', function() {
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compareLocations(b, a).should.be.exactly(1);
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});
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});
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describe('location index number', function() {
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beforeEach(function() {
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a = createLocation({
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index: 10
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});
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b = createLocation({
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index: 20
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});
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});
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it('returns -1 when the first location index number comes before the second location index number', function() {
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compareLocations(a, b).should.be.exactly(-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', function() {
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compareLocations(b, a).should.be.exactly(1);
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});
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});
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describe('same location', function() {
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beforeEach(function() {
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a = createLocation();
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b = createLocation();
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});
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it('returns 0', function() {
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compareLocations(a, b).should.be.exactly(0);
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});
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});
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describe('start location set', function() {
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beforeEach(function() {
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a = {
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start: createLocation({
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line: 10
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})
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};
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b = {
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start: createLocation({
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line: 20
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})
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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', function() {
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compareLocations(a, b).should.be.exactly(-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', function() {
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compareLocations(b, a).should.be.exactly(1);
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});
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});
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});
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describe('string and object location comparison', function() {
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it('returns 1 when the first parameter is a string and the second parameter is an object', function() {
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compareLocations('alpha', createLocation()).should.be.exactly(1);
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});
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it('returns -1 when the first parameter is an object and the second parameter is a string', function() {
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compareLocations(createLocation(), 'alpha').should.be.exactly(-1);
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});
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});
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describe('unknown location type comparison', function() {
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it('returns 0 when the first parameter is an object and the second parameter is a number', function() {
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compareLocations(createLocation(), 123).should.be.exactly(0);
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});
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it('returns undefined when the first parameter is a number and the second parameter is an object', function() {
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should(compareLocations(123, createLocation())).be.undefined();
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});
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it('returns 0 when the first parameter is a string and the second parameter is a number', function() {
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compareLocations('alpha', 123).should.be.exactly(0);
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});
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it('returns undefined when the first parameter is a number and the second parameter is a string', function() {
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should(compareLocations(123, 'alpha')).be.undefined();
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});
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it('returns undefined when both the first parameter and the second parameter is a number', function() {
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should(compareLocations(123, 456)).be.undefined();
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});
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});
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});

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