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134 lines
4.9 KiB
134 lines
4.9 KiB
var assert = require('assert');
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var util = require('../lib/util');
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//
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// The important thing with mergeOptions() is that 'enabled' is always set in target option.
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//
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describe('util.mergeOptions', function () {
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it('handles good input without global options', function () {
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var options = {
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someValue: "silly value",
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aBoolOption: false,
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anObject: {
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answer:42
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},
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anotherObject: {
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enabled: false,
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},
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merge: null
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};
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// Case with empty target
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var mergeTarget = {};
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util.mergeOptions(mergeTarget, options, 'someValue');
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assert(mergeTarget.someValue === undefined, 'Non-object option should not be copied');
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assert(mergeTarget.anObject === undefined);
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util.mergeOptions(mergeTarget, options, 'aBoolOption');
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assert(mergeTarget.aBoolOption !== undefined, 'option aBoolOption should now be an object');
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assert(mergeTarget.aBoolOption.enabled === false, 'enabled value option aBoolOption should have been copied into object');
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util.mergeOptions(mergeTarget, options, 'anObject');
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assert(mergeTarget.anObject !== undefined, 'Option object is not copied');
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assert(mergeTarget.anObject.answer === 42);
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assert(mergeTarget.anObject.enabled === true);
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util.mergeOptions(mergeTarget, options, 'anotherObject');
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assert(mergeTarget.anotherObject.enabled === false, 'enabled value from options must have priority');
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util.mergeOptions(mergeTarget, options, 'merge');
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assert(mergeTarget.merge === undefined, 'Explicit null option should not be copied, there is no global option for it');
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// Case with non-empty target
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mergeTarget = {
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someValue: false,
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aBoolOption: true,
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anObject: {
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answer: 49
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},
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anotherObject: {
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enabled: true,
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},
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merge: 'hello'
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};
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util.mergeOptions(mergeTarget, options, 'someValue');
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assert(mergeTarget.someValue === false, 'Non-object option should not be copied');
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assert(mergeTarget.anObject.answer === 49, 'Sibling option should not be changed');
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util.mergeOptions(mergeTarget, options, 'aBoolOption');
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assert(mergeTarget.aBoolOption !== true, 'option enabled should have been overwritten');
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assert(mergeTarget.aBoolOption.enabled === false, 'enabled value option aBoolOption should have been copied into object');
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util.mergeOptions(mergeTarget, options, 'anObject');
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assert(mergeTarget.anObject.answer === 42);
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assert(mergeTarget.anObject.enabled === true);
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util.mergeOptions(mergeTarget, options, 'anotherObject');
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assert(mergeTarget.anotherObject !== undefined, 'Option object is not copied');
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assert(mergeTarget.anotherObject.enabled === false, 'enabled value from options must have priority');
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util.mergeOptions(mergeTarget, options, 'merge');
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assert(mergeTarget.merge === 'hello', 'Explicit null-option should not be copied, already present in target');
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});
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it('gracefully handles bad input', function () {
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var mergeTarget = {};
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var options = {
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merge: null
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};
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var errMsg = 'Non-object parameters should not be accepted';
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assert.throws(() => util.mergeOptions(null, options, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(undefined, options, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(42, options, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, null, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, undefined, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, 42, 'anything'), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, options, null), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, options, undefined), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, options, 'anything', null), Error, errMsg);
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assert.throws(() => util.mergeOptions(mergeTarget, options, 'anything', 'not an object'), Error, errMsg);
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util.mergeOptions(mergeTarget, options, 'iDontExist');
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assert(mergeTarget.iDontExist === undefined);
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});
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it('handles good input with global options', function () {
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var mergeTarget = {
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};
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var options = {
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merge: null,
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missingEnabled: {
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answer: 42
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},
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alsoMissingEnabled: { // has no enabled in globals
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answer: 42
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}
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};
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var globalOptions = {
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merge: {
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enabled: false
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},
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missingEnabled: {
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enabled: false
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}
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};
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util.mergeOptions(mergeTarget, options, 'merge', globalOptions);
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assert(mergeTarget.merge.enabled === false, "null-option should create an empty target object");
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util.mergeOptions(mergeTarget, options, 'missingEnabled', globalOptions);
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assert(mergeTarget.missingEnabled.enabled === false);
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util.mergeOptions(mergeTarget, options, 'alsoMissingEnabled', globalOptions);
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assert(mergeTarget.alsoMissingEnabled.enabled === true);
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});
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});
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