Mailspring/app/spec/utils/utils-spec.es6

/* eslint no-new-wrappers: 0 */
/* eslint no-new-object: 0 */
const Utils = require('../../src/flux/models/utils');
const Thread = require('../../src/flux/models/thread').default;
const Contact = require('../../src/flux/models/contact').default;

class Foo {
  static initClass() {
    this.prototype.field = {
      a: 1,
      b: 2,
    };
  }
  constructor(instanceVar) {
    this.instanceVar = instanceVar;
  }
  method(stuff) {
    this.stuff = stuff;
  }
}
Foo.initClass();

class Bar extends Foo {
  subMethod(stuff) {
    this.moreStuff = stuff;
    return this.method(stuff);
  }
}

describe('Utils', function() {
  describe('modelTypesReviver', function() {
    beforeEach(function() {
      this.testThread = new Thread({
        id: 'local-1',
        accountId: '1',
        pluginMetadata: [],
        participants: [
          new Contact({ id: 'local-a', name: 'Juan', email: 'juan@nylas.com', accountId: '1' }),
          new Contact({ id: 'local-b', name: 'Ben', email: 'ben@nylas.com', accountId: '1' }),
        ],
        subject: 'Test 1234',
      });
    });

    it('should serialize and de-serialize models correctly', function() {
      const expectedString =
        '[{"id":"local-1","aid":"1","metadata":[],"subject":"Test 1234","categories":[],"participants":[{"id":"local-a","aid":"1","name":"Juan","email":"juan@nylas.com","thirdPartyData":{},"__cls":"Contact"},{"id":"local-b","aid":"1","name":"Ben","email":"ben@nylas.com","thirdPartyData":{},"__cls":"Contact"}],"__cls":"Thread"}]';

      const jsonString = JSON.stringify([this.testThread]);
      expect(jsonString).toEqual(expectedString);
      const revived = JSON.parse(jsonString, Utils.modelTypesReviver);
      expect(revived).toEqual([this.testThread]);
    });

    it("should re-inflate Models in places they're not explicitly declared types", function() {
      const b = { id: 'ThreadsToProcess', json: [this.testThread] };
      const jsonString = JSON.stringify(b);
      const expectedString =
        '{"id":"ThreadsToProcess","json":[{"id":"local-1","aid":"1","metadata":[],"subject":"Test 1234","categories":[],"participants":[{"id":"local-a","aid":"1","name":"Juan","email":"juan@nylas.com","thirdPartyData":{},"__cls":"Contact"},{"id":"local-b","aid":"1","name":"Ben","email":"ben@nylas.com","thirdPartyData":{},"__cls":"Contact"}],"__cls":"Thread"}]}';

      expect(jsonString).toEqual(expectedString);
      const revived = JSON.parse(jsonString, Utils.modelTypesReviver);
      expect(revived).toEqual(b);
      expect(revived.json[0] instanceof Thread).toBe(true);
      expect(revived.json[0].participants[0] instanceof Contact).toBe(true);
    });
  });

  describe('deepClone', function() {
    beforeEach(function() {
      this.v1 = [1, 2, 3];
      this.v2 = [4, 5, 6];
      this.foo = new Foo(this.v1);
      this.bar = new Bar(this.v2);
      this.o2 = [
        this.foo,
        { v1: this.v1, v2: this.v2, foo: this.foo, bar: this.bar, baz: 'baz', fn: Foo },
        'abc',
      ];
      this.o2.circular = this.o2;
      this.o2Clone = Utils.deepClone(this.o2);
    });

    it('deep clones dates correctly', function() {
      const d1 = new Date(2016, 1, 1);
      const d2 = Utils.deepClone(d1);
      expect(d2.valueOf()).toBe(d1.valueOf());
    });

    it('makes a deep clone', function() {
      this.v1.push(4);
      this.v2.push(7);
      this.foo.stuff = 'stuff';
      this.bar.subMethod('stuff');
      expect(this.o2Clone[0].stuff).toBeUndefined();
      expect(this.o2Clone[1].foo.stuff).toBeUndefined();
      expect(this.o2Clone[1].bar.stuff).toBeUndefined();
      expect(this.o2Clone[1].v1.length).toBe(3);
      expect(this.o2Clone[1].v2.length).toBe(3);
      expect(this.o2Clone[2]).toBe('abc');
    });

    it('does not deep clone the prototype', function() {
      this.foo.field.a = 'changed under the hood';
      expect(this.o2Clone[0].field.a).toBe('changed under the hood');
    });

    it('clones constructors properly', function() {
      expect(new this.o2Clone[1].fn() instanceof Foo).toBe(true);
    });

    it('clones prototypes properly', function() {
      expect(this.o2Clone[1].foo instanceof Foo).toBe(true);
      expect(this.o2Clone[1].bar instanceof Bar).toBe(true);
    });

    it('can take a customizer to edit values as we clone', function() {
      const clone = Utils.deepClone(this.o2, function(key, clonedValue) {
        if (key === 'v2') {
          clonedValue.push('custom value');
          return clonedValue;
        } else {
          return clonedValue;
        }
      });
      this.v2.push(7);
      expect(clone[1].v2.length).toBe(4);
      expect(clone[1].v2[3]).toBe('custom value');
    });
  });

  // Pulled equality tests from underscore
  // https://github.com/jashkenas/underscore/blob/master/test/objects.js
  describe('isEqual', function() {
    describe('custom behavior', function() {
      it('makes functions always equal', function() {
        const f1 = function() {};
        const f2 = function() {};
        expect(Utils.isEqual(f1, f2)).toBe(false);
        expect(Utils.isEqual(f1, f2, { functionsAreEqual: true })).toBe(true);
      });

      it('can ignore keys in objects', function() {
        const o1 = {
          foo: 'bar',
          arr: [1, 2, 3],
          nest: { a: 'b', c: 1, ignoreMe: 5 },
          ignoreMe: 123,
        };
        const o2 = {
          foo: 'bar',
          arr: [1, 2, 3],
          nest: { a: 'b', c: 1, ignoreMe: 10 },
          ignoreMe: 456,
        };

        expect(Utils.isEqual(o1, o2)).toBe(false);
        expect(Utils.isEqual(o1, o2, { ignoreKeys: ['ignoreMe'] })).toBe(true);
      });
    });

    it('passes all underscore equality tests', function() {
      const First = function() {
        return (this.value = 1);
      };
      First.prototype.value = 1;

      const Second = function() {
        return (this.value = 1);
      };
      Second.prototype.value = 2;

      const ok = val => expect(val).toBe(true);

      // Basic equality and identity comparisons.
      ok(Utils.isEqual(null, null), '`null` is equal to `null`');
      ok(Utils.isEqual(), '`undefined` is equal to `undefined`');

      ok(!Utils.isEqual(0, -0), '`0` is not equal to `-0`');
      ok(!Utils.isEqual(-0, 0), 'Commutative equality is implemented for `0` and `-0`');
      ok(!Utils.isEqual(null, undefined), '`null` is not equal to `undefined`');
      ok(
        !Utils.isEqual(undefined, null),
        'Commutative equality is implemented for `null` and `undefined`'
      );

      // String object and primitive comparisons.
      ok(Utils.isEqual('Curly', 'Curly'), 'Identical string primitives are equal');
      ok(
        Utils.isEqual(new String('Curly'), new String('Curly')),
        'String objects with identical primitive values are equal'
      );
      ok(
        Utils.isEqual(new String('Curly'), 'Curly'),
        'String primitives and their corresponding object wrappers are equal'
      );
      ok(
        Utils.isEqual('Curly', new String('Curly')),
        'Commutative equality is implemented for string objects and primitives'
      );

      ok(!Utils.isEqual('Curly', 'Larry'), 'String primitives with different values are not equal');
      ok(
        !Utils.isEqual(new String('Curly'), new String('Larry')),
        'String objects with different primitive values are not equal'
      );
      ok(
        !Utils.isEqual(new String('Curly'), {
          toString() {
            return 'Curly';
          },
        }),
        'String objects and objects with a custom `toString` method are not equal'
      );

      // Number object and primitive comparisons.
      ok(Utils.isEqual(75, 75), 'Identical number primitives are equal');
      ok(
        Utils.isEqual(new Number(75), new Number(75)),
        'Number objects with identical primitive values are equal'
      );
      ok(
        Utils.isEqual(75, new Number(75)),
        'Number primitives and their corresponding object wrappers are equal'
      );
      ok(
        Utils.isEqual(new Number(75), 75),
        'Commutative equality is implemented for number objects and primitives'
      );
      ok(!Utils.isEqual(new Number(0), -0), '`new Number(0)` and `-0` are not equal');
      ok(
        !Utils.isEqual(0, new Number(-0)),
        'Commutative equality is implemented for `new Number(0)` and `-0`'
      );

      ok(
        !Utils.isEqual(new Number(75), new Number(63)),
        'Number objects with different primitive values are not equal'
      );
      ok(
        !Utils.isEqual(new Number(63), {
          valueOf() {
            return 63;
          },
        }),
        'Number objects and objects with a `valueOf` method are not equal'
      );

      // Comparisons involving `NaN`.
      ok(Utils.isEqual(NaN, NaN), '`NaN` is equal to `NaN`');
      ok(Utils.isEqual(new Object(NaN), NaN), 'Object(`NaN`) is equal to `NaN`');
      ok(!Utils.isEqual(61, NaN), 'A number primitive is not equal to `NaN`');
      ok(!Utils.isEqual(new Number(79), NaN), 'A number object is not equal to `NaN`');
      ok(!Utils.isEqual(Infinity, NaN), '`Infinity` is not equal to `NaN`');

      // Boolean object and primitive comparisons.
      ok(Utils.isEqual(true, true), 'Identical boolean primitives are equal');
      ok(
        Utils.isEqual(new Boolean(), new Boolean()),
        'Boolean objects with identical primitive values are equal'
      );
      ok(
        Utils.isEqual(true, new Boolean(true)),
        'Boolean primitives and their corresponding object wrappers are equal'
      );
      ok(
        Utils.isEqual(new Boolean(true), true),
        'Commutative equality is implemented for booleans'
      );
      ok(
        !Utils.isEqual(new Boolean(true), new Boolean()),
        'Boolean objects with different primitive values are not equal'
      );

      // Common type coercions.
      ok(!Utils.isEqual(new Boolean(false), true), '`new Boolean(false)` is not equal to `true`');
      ok(!Utils.isEqual('75', 75), 'String and number primitives with like values are not equal');
      ok(
        !Utils.isEqual(new Number(63), new String(63)),
        'String and number objects with like values are not equal'
      );
      ok(
        !Utils.isEqual(75, '75'),
        'Commutative equality is implemented for like string and number values'
      );
      ok(!Utils.isEqual(0, ''), 'Number and string primitives with like values are not equal');
      ok(!Utils.isEqual(1, true), 'Number and boolean primitives with like values are not equal');
      ok(
        !Utils.isEqual(new Boolean(false), new Number(0)),
        'Boolean and number objects with like values are not equal'
      );
      ok(
        !Utils.isEqual(false, new String('')),
        'Boolean primitives and string objects with like values are not equal'
      );
      ok(
        !Utils.isEqual(12564504e5, new Date(2009, 9, 25)),
        'Dates and their corresponding numeric primitive values are not equal'
      );

      // Dates.
      ok(
        Utils.isEqual(new Date(2009, 9, 25), new Date(2009, 9, 25)),
        'Date objects referencing identical times are equal'
      );
      ok(
        !Utils.isEqual(new Date(2009, 9, 25), new Date(2009, 11, 13)),
        'Date objects referencing different times are not equal'
      );
      ok(
        !Utils.isEqual(new Date(2009, 11, 13), {
          getTime() {
            return 12606876e5;
          },
        }),
        'Date objects and objects with a `getTime` method are not equal'
      );
      ok(!Utils.isEqual(new Date('Curly'), new Date('Curly')), 'Invalid dates are not equal');

      // Functions.
      ok(
        !Utils.isEqual(First, Second),
        'Different functions with identical bodies and source code representations are not equal'
      );

      // RegExps.
      ok(
        Utils.isEqual(/(?:)/gim, /(?:)/gim),
        'RegExps with equivalent patterns and flags are equal'
      );
      ok(Utils.isEqual(/(?:)/gi, /(?:)/gi), 'Flag order is not significant');
      ok(
        !Utils.isEqual(/(?:)/g, /(?:)/gi),
        'RegExps with equivalent patterns and different flags are not equal'
      );
      ok(
        !Utils.isEqual(/Moe/gim, /Curly/gim),
        'RegExps with different patterns and equivalent flags are not equal'
      );
      ok(!Utils.isEqual(/(?:)/gi, /(?:)/g), 'Commutative equality is implemented for RegExps');
      ok(
        !Utils.isEqual(/Curly/g, {
          source: 'Larry',
          global: true,
          ignoreCase: false,
          multiline: false,
        }),
        'RegExps and RegExp-like objects are not equal'
      );

      // Empty arrays, array-like objects, and object literals.
      ok(Utils.isEqual({}, {}), 'Empty object literals are equal');
      ok(Utils.isEqual([], []), 'Empty array literals are equal');
      ok(Utils.isEqual([{}], [{}]), 'Empty nested arrays and objects are equal');
      ok(!Utils.isEqual({ length: 0 }, []), 'Array-like objects and arrays are not equal.');
      ok(
        !Utils.isEqual([], { length: 0 }),
        'Commutative equality is implemented for array-like objects'
      );

      ok(!Utils.isEqual({}, []), 'Object literals and array literals are not equal');
      ok(!Utils.isEqual([], {}), 'Commutative equality is implemented for objects and arrays');

      // Arrays with primitive and object values.
      ok(
        Utils.isEqual([1, 'Larry', true], [1, 'Larry', true]),
        'Arrays containing identical primitives are equal'
      );
      ok(
        Utils.isEqual([/Moe/g, new Date(2009, 9, 25)], [/Moe/g, new Date(2009, 9, 25)]),
        'Arrays containing equivalent elements are equal'
      );

      // Multi-dimensional arrays.
      let a = [
        new Number(47),
        false,
        'Larry',
        /Moe/,
        new Date(2009, 11, 13),
        ['running', 'biking', new String('programming')],
        { a: 47 },
      ];
      let b = [
        new Number(47),
        false,
        'Larry',
        /Moe/,
        new Date(2009, 11, 13),
        ['running', 'biking', new String('programming')],
        { a: 47 },
      ];
      ok(
        Utils.isEqual(a, b),
        'Arrays containing nested arrays and objects are recursively compared'
      );

      // Overwrite the methods defined in ES 5.1 section 15.4.4.
      a.forEach = a.map = a.filter = a.every = a.indexOf = a.lastIndexOf = a.some = a.reduce = a.reduceRight = null;
      b.join = b.pop = b.reverse = b.shift = b.slice = b.splice = b.concat = b.sort = b.unshift = null;

      // Array elements and properties.
      ok(
        Utils.isEqual(a, b),
        'Arrays containing equivalent elements and different non-numeric properties are equal'
      );
      a.push('White Rocks');
      ok(!Utils.isEqual(a, b), 'Arrays of different lengths are not equal');
      a.push('East Boulder');
      b.push('Gunbarrel Ranch', 'Teller Farm');
      ok(
        !Utils.isEqual(a, b),
        'Arrays of identical lengths containing different elements are not equal'
      );

      // Sparse arrays.
      ok(Utils.isEqual(Array(3), Array(3)), 'Sparse arrays of identical lengths are equal');
      ok(
        !Utils.isEqual(Array(3), Array(6)),
        'Sparse arrays of different lengths are not equal when both are empty'
      );

      const sparse = [];
      sparse[1] = 5;
      ok(Utils.isEqual(sparse, [undefined, 5]), 'Handles sparse arrays as dense');

      // Simple objects.
      ok(
        Utils.isEqual({ a: 'Curly', b: 1, c: true }, { a: 'Curly', b: 1, c: true }),
        'Objects containing identical primitives are equal'
      );
      ok(
        Utils.isEqual(
          { a: /Curly/g, b: new Date(2009, 11, 13) },
          { a: /Curly/g, b: new Date(2009, 11, 13) }
        ),
        'Objects containing equivalent members are equal'
      );
      ok(
        !Utils.isEqual({ a: 63, b: 75 }, { a: 61, b: 55 }),
        'Objects of identical sizes with different values are not equal'
      );
      ok(
        !Utils.isEqual({ a: 63, b: 75 }, { a: 61, c: 55 }),
        'Objects of identical sizes with different property names are not equal'
      );
      ok(!Utils.isEqual({ a: 1, b: 2 }, { a: 1 }), 'Objects of different sizes are not equal');
      ok(
        !Utils.isEqual({ a: 1 }, { a: 1, b: 2 }),
        'Commutative equality is implemented for objects'
      );
      ok(
        !Utils.isEqual({ x: 1, y: undefined }, { x: 1, z: 2 }),
        'Objects with identical keys and different values are not equivalent'
      );

      // `A` contains nested objects and arrays.
      a = {
        name: new String('Moe Howard'),
        age: new Number(77),
        stooge: true,
        hobbies: ['acting'],
        film: {
          name: 'Sing a Song of Six Pants',
          release: new Date(1947, 9, 30),
          stars: [new String('Larry Fine'), 'Shemp Howard'],
          minutes: new Number(16),
          seconds: 54,
        },
      };

      // `B` contains equivalent nested objects and arrays.
      b = {
        name: new String('Moe Howard'),
        age: new Number(77),
        stooge: true,
        hobbies: ['acting'],
        film: {
          name: 'Sing a Song of Six Pants',
          release: new Date(1947, 9, 30),
          stars: [new String('Larry Fine'), 'Shemp Howard'],
          minutes: new Number(16),
          seconds: 54,
        },
      };
      ok(Utils.isEqual(a, b), 'Objects with nested equivalent members are recursively compared');

      // Instances.
      ok(Utils.isEqual(new First(), new First()), 'Object instances are equal');
      ok(
        !Utils.isEqual(new First(), new Second()),
        'Objects with different constructors and identical own properties are not equal'
      );
      ok(
        !Utils.isEqual({ value: 1 }, new First()),
        'Object instances and objects sharing equivalent properties are not equal'
      );
      ok(
        !Utils.isEqual({ value: 2 }, new Second()),
        'The prototype chain of objects should not be examined'
      );

      // Circular Arrays.
      (a = []).push(a);
      (b = []).push(b);
      ok(Utils.isEqual(a, b), 'Arrays containing circular references are equal');
      a.push(new String('Larry'));
      b.push(new String('Larry'));
      ok(
        Utils.isEqual(a, b),
        'Arrays containing circular references and equivalent properties are equal'
      );
      a.push('Shemp');
      b.push('Curly');
      ok(
        !Utils.isEqual(a, b),
        'Arrays containing circular references and different properties are not equal'
      );

      // More circular arrays #767.
      a = ['everything is checked but', 'this', 'is not'];
      a[1] = a;
      b = ['everything is checked but', ['this', 'array'], 'is not'];
      ok(
        !Utils.isEqual(a, b),
        'Comparison of circular references with non-circular references are not equal'
      );

      // Circular Objects.
      a = { abc: null };
      b = { abc: null };
      a.abc = a;
      b.abc = b;
      ok(Utils.isEqual(a, b), 'Objects containing circular references are equal');
      a.def = 75;
      b.def = 75;
      ok(
        Utils.isEqual(a, b),
        'Objects containing circular references and equivalent properties are equal'
      );
      a.def = new Number(75);
      b.def = new Number(63);
      ok(
        !Utils.isEqual(a, b),
        'Objects containing circular references and different properties are not equal'
      );

      // More circular objects #767.
      a = { everything: 'is checked', but: 'this', is: 'not' };
      a.but = a;
      b = { everything: 'is checked', but: { that: 'object' }, is: 'not' };
      ok(
        !Utils.isEqual(a, b),
        'Comparison of circular references with non-circular object references are not equal'
      );

      // Cyclic Structures.
      a = [{ abc: null }];
      b = [{ abc: null }];
      (a[0].abc = a).push(a);
      (b[0].abc = b).push(b);
      ok(Utils.isEqual(a, b), 'Cyclic structures are equal');
      a[0].def = 'Larry';
      b[0].def = 'Larry';
      ok(Utils.isEqual(a, b), 'Cyclic structures containing equivalent properties are equal');
      a[0].def = new String('Larry');
      b[0].def = new String('Curly');
      ok(!Utils.isEqual(a, b), 'Cyclic structures containing different properties are not equal');

      // Complex Circular References.
      a = { foo: { b: { foo: { c: { foo: null } } } } };
      b = { foo: { b: { foo: { c: { foo: null } } } } };
      a.foo.b.foo.c.foo = a;
      b.foo.b.foo.c.foo = b;
      ok(
        Utils.isEqual(a, b),
        'Cyclic structures with nested and identically-named properties are equal'
      );

      // Chaining.
      // NOTE: underscore doesn't support chaining
      //
      // ok(!Utils.isEqual(_({x: 1, y: undefined}).chain(), _({x: 1, z: 2}).chain()), 'Chained objects containing different values are not equal')
      //
      // a = _({x: 1, y: 2}).chain()
      // b = _({x: 1, y: 2}).chain()
      // equal(Utils.isEqual(a.isEqual(b), _(true)), true, '`isEqual` can be chained')

      // Objects without a `constructor` property
      if (Object.create) {
        a = Object.create(null, { x: { value: 1, enumerable: true } });
        b = { x: 1 };
        ok(Utils.isEqual(a, b), 'Handles objects without a constructor (e.g. from Object.create');
      }

      Foo = function() {
        return (this.a = 1);
      };
      Foo.prototype.constructor = null;

      const other = { a: 1 };
      ok(!Utils.isEqual(new Foo(), other));
    });
  });

  describe('subjectWithPrefix', function() {
    it('should replace an existing Re:', () =>
      expect(Utils.subjectWithPrefix('Re: Test Case', 'Fwd:')).toEqual('Fwd: Test Case'));

    it('should replace an existing re:', () =>
      expect(Utils.subjectWithPrefix('re: Test Case', 'Fwd:')).toEqual('Fwd: Test Case'));

    it('should replace an existing Fwd:', () =>
      expect(Utils.subjectWithPrefix('Fwd: Test Case', 'Re:')).toEqual('Re: Test Case'));

    it('should replace an existing fwd:', () =>
      expect(Utils.subjectWithPrefix('fwd: Test Case', 'Re:')).toEqual('Re: Test Case'));

    it('should not replace Re: or Fwd: found embedded in the subject', function() {
      expect(Utils.subjectWithPrefix('My questions are: 123', 'Fwd:')).toEqual(
        'Fwd: My questions are: 123'
      );
      expect(Utils.subjectWithPrefix('My questions fwd: 123', 'Fwd:')).toEqual(
        'Fwd: My questions fwd: 123'
      );
    });

    it('should work if no existing prefix is present', () =>
      expect(Utils.subjectWithPrefix('My questions', 'Fwd:')).toEqual('Fwd: My questions'));
  });
});