hierarchy-helper.js ➔ instanceDefinedOrNull - Code Metrics - Inspection of "Merged 'third' condition with loops conditions." - EgaLabs/node-ejsception - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 44d532...dfbaad )

by Esaú

created 2017-06-17 12:01 UTC

hierarchy-helper.js ➔ instanceDefinedOrNull B

↳ Parent: spec/helpers/hierarchy-helper.js

Complexity

Conditions	10
Paths	4

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	3
Bugs	0	Features	0

Metric	Value
cc	10
c	3
b	0
f	0
nc	4
dl	0
loc	20
rs	7.2765
nop	8

How to fix Complexity Many Parameters

// spec/helpers/hierarchy-helper.js
"use strict";

// :: DEPENDENCIES

const path = require("path");
const root = path.dirname(path.dirname(__dirname));

module.exports = (hierarchy) => {
    // check parameters
    if (!Array.isArray(hierarchy)) {
        throw new Error("hierarchy must be an array");
    }

    // load dependencies
    let deps      = hierarchy.map(value => require(path.join(root, value + ".js")));
    let klassName = hierarchy.pop();
    let Klass     = deps.pop();
    const first   = (hierarchy.length === 0);
    const third   = (hierarchy.length >= 3);

    // :: TESTING

    // test the last class in the hierarchy tree
    describe(klassName, () => {

        // :: INHERITED PROTOTYPE

        // all inherit from Object
        it("should inherit from 'Object'", () => {
            expect(new Klass()).toEqual(jasmine.any(Object));
        });

        // check the hierarchy tree
        for (let i = 0; i < hierarchy.length; i += 1) {
            it("should inherit from '" + hierarchy[i] + "'", () => {
                expect(new Klass()).toEqual(jasmine.any(deps[i]));
            });
        }

        // check inherited properties
        if (!first) {
            it("should have a prototype property named 'name'", () => {
                expect(Klass.prototype).toHaveString("name");
            });

            it("should have a prototype property named 'message'", () => {
                expect(Klass.prototype).toHaveString("message");
            });

            it("should have a prototype property named 'code'", () => {
                expect(Klass.prototype).toHaveMember("code");
            });
        }

        // check Object methods
        it("should have a prototype method named 'toString()'", () => {
            expect(Klass.prototype).toHaveMethod("toString");
        });

        // check inherited methods
        if (!first) {
            it("should have a prototype method named 'native()'", () => {
                expect(Klass.prototype).toHaveMethod("native");
            });
        }

        // :: EXTENDED PROTOTYPE

        // check extended properties
        if (first) {
            it("should have a prototype property named 'name'", () => {
                expect(Klass.prototype).toHaveString("name");
            });

            it("should have a prototype property named 'message'", () => {
                expect(Klass.prototype).toHaveString("message");
            });

            it("should have a prototype property named 'code'", () => {
                expect(Klass.prototype).toHaveMember("code");
            });

            it("should have a prototype method named 'native()'", () => {
                expect(Klass.prototype).toHaveMethod("native");
            });
        }

        // :: PROTOTYPE VALUES

        it("should have the 'class' name in the prototype property named 'name'", () => {
            expect(Klass.prototype.name).toEqual(klassName);
        });

        it("should have a dummy default value as message", () => {
            expect(Klass.prototype.message).toEqual("thrown");
        });

        it("should have a null default value as code", () => {
            expect(Klass.prototype.code).toBeNull();
        });

        // :: CONSTRUCTOR

        it("should instantiate without parameters", () => {
            instanceNoParameters(Klass, testNoErrors, third);
            testNoErrors(() => new Klass());
        });

        it("should instantiate with parameters", () => {
            instanceParameters(Klass, testNoErrors, testNoErrors, testNoErrors, third);
        });

        // use the tests according to the hierarchy level
        if (third) {
            testThird(Klass);
        } else {
            test(Klass);
        }

    });

};

// Tests that a function doesn't throw any Error
function testNoErrors(fn) {
    expect(fn).not.toThrowError("parameter 'name' must be a 'string'");
    expect(fn).not.toThrowError("parameter 'message' must be a 'string'");
    expect(fn).not.toThrowError("parameter 'code' must be a 'number'");
}

// Tests instantiation of a class without parameters (undefined, null or none).
function instanceNoParameters(Klass, fn, third) {
    let arg1, arg2, arg3, test;
    test = (() => new Klass(arg1, arg2, arg3));
    for (let i = 0; i < 2; i += 1) {
        arg1 = (i % 2 === 0 ? undefined : null);
        for (let j = 0; j < 2; j += 1) {
            arg2 = (j % 2 === 0 ? undefined : null);
            if (third) {
                fn(test);
            } else {
                for (let e = 0; e < 2; e += 1) {
                    arg3 = (e % 2 === 0 ? undefined : null);
                    fn(test);
                }
            }
        }
    }
}

// Tests instantiation of a class with parameters.
function instanceParameters(Klass, fn1, fn2, fn3, third) {
    let arg1, arg2, arg3, test3, args1, args2, args3;
    const test1 = (() => new Klass(arg1));
    const test2 = (() => new Klass(arg1, arg2));
    if (third) {
        test3 = (() => null);
        args1 = [undefined, null, Klass.prototype.message];
        args2 = [undefined, null, Math.round(Math.random() * 0xFFFFFFFF)];
        args3 = [];
    } else {
        test3 = (() => new Klass(arg1, arg2, arg3));
        args1 = [undefined, null, Klass.prototype.name];
        args2 = [undefined, null, Klass.prototype.message];
        args3 = [undefined, null, Math.round(Math.random() * 0xFFFFFFFF)];
    }
    for (let i = 0; i < args1.length; i += 1) {
        arg1 = args1[i];
        fn1(test1);
        for (let j = 0; j < args2.length; j += 1) {
            arg2 = args2[j];
            fn2(test2);
            for (let e = 0; !third && e < args3.length; e += 1) {
                arg3 = args3[e];
                fn3(test3);
            }
        }
    }
}

// Loops for each parameter of the Klass constructor.
// If the iteration is even, the parameter is defined.
// If the iteration is odd, the parameter is null.
function instanceDefinedOrNull(Klass, name, message, code, fn1, fn2, fn3, third) {
    for (let i = 0; i < 2; i += 1) {
        const even1   = (i % 2 === 0);
        const arg1    = (even1 ? (third ? message : name) : null);
        const source1 = new Klass(arg1);
        fn1(source1, even1);
        for (let j = 0; j < 2; j += 1) {
            const even2   = (j % 2 === 0);
            const arg2    = (even2 ? (third ? code : message) : null);
            const source2 = new Klass(arg1, arg2);
            fn2(source2, even1, even2);
            for (let e = 0; !third && e < 2; e += 1) {
                const even3   = (e % 2 === 0);
                const arg3    = (even3 ? code : null);
                const source3 = new Klass(arg1, arg2, arg3);
                fn3(source3, even1, even2, even3);
            }
        }
    }
}

// Loops for each parameter of the Klass constructor using wrong types to test Error throwing.
function instanceThrowErrors(Klass, fn1, fn2, fn3, third) {
    let arg1, arg2, arg3, test33, test32, test31, test21, test22, test11, len1, len2, len3;
    const noStr = [{}, true, false, 42, 3.1416, -42, -3.1416, () => null];
    const noNmb = [{}, true, false, '', "qwerty", () => null];
    len1        = noStr.length;
    if (third) {
        len2   = noNmb.length;
        len3   = 0;
        test33 = test32 = test31 = (() => null);
    } else {
        len2   = len1;
        len3   = noNmb.length;
        test33 = (() => new Klass(arg1, arg2, arg3));
        test32 = (() => new Klass(null, arg2, arg3));
        test31 = (() => new Klass(null, null, arg3));
    }
    test22 = (() => new Klass(arg1, arg2));
    test21 = (() => new Klass(null, arg2));
    test11 = (() => new Klass(arg1));
    if (typeof Symbol === "function") {
        noStr.push(Symbol("symbol"));
        noNmb.push(Symbol("symbol"));
    }
    for (let i = 0; i < len1; i += 1) {
        arg1 = noStr[i];
        fn1(test11);
        for (let j = 0; j < len2; j += 1) {
            arg2 = (third ? noNmb[j] : noStr[j]);
            fn2(test21, test22);
            for (let e = 0; !third && e < len3; e += 1) {
                arg3 = noNmb[e];
                fn3(test31, test32, test33);
            }
        }
    }
}

// Tests classes that are a third level subclass, meaning that they require 2 arguments (message and code).
function testThird(Klass) {

    // :: CONSTRUCTOR

    it("should throw an Error if 'message' or 'code' are invalid parameters", () => {
        instanceThrowErrors(Klass, (test11) => {
            expect(test11).toThrowError("parameter 'message' must be a 'string'");
        }, (test21, test22) => {
            expect(test21).toThrowError("parameter 'code' must be a 'number'");
            expect(test22).toThrowError("parameter 'message' must be a 'string'");
        }, null, true);
    });

    // :: MEMBER PROPERTIES

    const message = "asdf";
    const code    = Math.round(Math.random() * 0xFFFFFFFF);

    it("should have all correct properties once instantiated", () => {
        instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
            if (even) {
                expect(instance.name).toEqual(Klass.prototype.name);
                expect(instance.message).toEqual(message);
            } else {
                expect(instance.name).toEqual(Klass.prototype.name);
                expect(instance.message).toEqual(Klass.prototype.message);
            }
            expect(instance.code).toBeNull();
        }, (instance, even1, even2) => {
            expect(instance.name).toEqual(Klass.prototype.name);
            expect(instance.message).toEqual(even1 ? message : Klass.prototype.message);
            expect(instance.code).toEqual(even2 ? code : null);
        }, null, true);
    });

    // :: MEMBER METHODS

    it("#toString()", () => {
        instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
            let exp;
            if (even) {
                exp = Klass.prototype.name + ": " + message + '.';
            } else {
                exp = Klass.prototype.name + ": " + Klass.prototype.message + '.';
            }
            expect(instance.toString()).toEqual(exp);
        }, (instance, even1, even2) => {
            let exp;
            exp  = Klass.prototype.name;
            exp += (even2 ? " (0x" + code.toString(16) + "):" : ':' ) + ' ';
            exp += (even1 ? message : Klass.prototype.message) + '.';
            expect(instance.toString()).toEqual(exp);
        }, null, true);
    });

    it("#native()", () => {
        instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
            const exp = (even ? message : Klass.prototype.message);
            expect(instance.native()).toEqual(new Error(exp));
        }, (instance, even1) => {
            const exp = (even1 ? message : Klass.prototype.message);
            expect(instance.native()).toEqual(new Error(exp));
        }, null, true);
    });

}

// Tests classes that require 3 arguments (name, message and code).
function test(Klass) {

    // :: CONSTRUCTOR

    it("should throw an Error if 'message' or 'code' are invalid parameters", () => {
        instanceThrowErrors(Klass, (test11) => {
            expect(test11).toThrowError("parameter 'name' must be a 'string'");
        }, (test21, test22) => {
            expect(test22).toThrowError("parameter 'name' must be a 'string'");
            expect(test21).toThrowError("parameter 'message' must be a 'string'");
        }, (test31, test32, test33) => {
            expect(test33).toThrowError("parameter 'name' must be a 'string'");
            expect(test32).toThrowError("parameter 'message' must be a 'string'");
            expect(test31).toThrowError("parameter 'code' must be a 'number'");
        }, false);
    });

    // :: MEMBER PROPERTIES

    const name    = "qwerty";
    const message = "asdf";
    const code    = Math.round(Math.random() * 0xFFFFFFFF);

    it("should have all correct properties once instantiated", () => {
        instanceDefinedOrNull(Klass, name, message, code, (instance, even) => {
            if (even) {
                expect(instance.name).toEqual(name);
                expect(instance.message).toEqual(Klass.prototype.message);
            } else {
                expect(instance.name).toEqual(Klass.prototype.name);
                expect(instance.message).toEqual(Klass.prototype.message);
            }
            expect(instance.code).toBeNull();
        }, (instance, even1, even2) => {
            expect(instance.name).toEqual(even1 ? name : Klass.prototype.name);
            expect(instance.message).toEqual(even2 ? message : Klass.prototype.message);
            expect(instance.code).toBeNull();
        }, (instance, even1, even2, even3) => {
            expect(instance.name).toEqual(even1 ? name : Klass.prototype.name);
            expect(instance.message).toEqual(even2 ? message : Klass.prototype.message);
            expect(instance.code).toEqual(even3 ? code : null);
        }, false);
    });

    // :: MEMBER METHODS

    it("#toString()", () => {
        instanceDefinedOrNull(Klass, name, message, code, (instance, even) => {
            let exp;
            if (even) {
                exp = name + ": " + Klass.prototype.message + '.';
            } else {
                exp = Klass.prototype.name + ": " + Klass.prototype.message + '.';
            }
            expect(instance.toString()).toEqual(exp);
        }, (instance, even1, even2) => {
            let exp;
            exp  = (even1 ? name : Klass.prototype.name) + ':';
            exp += ' ' + (even2 ? message : Klass.prototype.message) + '.';
            expect(instance.toString()).toEqual(exp);
        }, (instance, even1, even2, even3) => {
            let exp;
            exp  = (even1 ? name : Klass.prototype.name);
            exp += (even3 ? " (0x" + code.toString(16) + "):" : ':') + ' ';
            exp += (even2 ? message : Klass.prototype.message) + '.';
            expect(instance.toString()).toEqual(exp);
        }, false);
    });

    it("#native()", () => {
        instanceDefinedOrNull(Klass, name, message, code, (instance) => {
            const exp = Klass.prototype.message;
            expect(instance.native()).toEqual(new Error(exp));
        }, (instance, even1, even2) => {
            const exp = (even2 ? message : Klass.prototype.message);
            expect(instance.native()).toEqual(new Error(exp));
        }, (instance, even1, even2) => {
            const exp = (even2 ? message : Klass.prototype.message);
            expect(instance.native()).toEqual(new Error(exp));
        }, false);
    });

}

1			// spec/helpers/hierarchy-helper.js
2			"use strict";
3
4			// :: DEPENDENCIES
5
6			const path = require("path");
7			const root = path.dirname(path.dirname(__dirname));
8
9			module.exports = (hierarchy) => {
10			// check parameters
11			if (!Array.isArray(hierarchy)) {
12			throw new Error("hierarchy must be an array");
13			}
14
15			// load dependencies
16			let deps = hierarchy.map(value => require(path.join(root, value + ".js")));
17			let klassName = hierarchy.pop();
18			let Klass = deps.pop();
19			const first = (hierarchy.length === 0);
20			const third = (hierarchy.length >= 3);
21
22			// :: TESTING
23
24			// test the last class in the hierarchy tree
25			describe(klassName, () => {
26
27			// :: INHERITED PROTOTYPE
28
29			// all inherit from Object
30			it("should inherit from 'Object'", () => {
31			expect(new Klass()).toEqual(jasmine.any(Object));
32			});
33
34			// check the hierarchy tree
35			for (let i = 0; i < hierarchy.length; i += 1) {
36			it("should inherit from '" + hierarchy[i] + "'", () => {
37			expect(new Klass()).toEqual(jasmine.any(deps[i]));
38			});
39			}
40
41			// check inherited properties
42			if (!first) {
43			it("should have a prototype property named 'name'", () => {
44			expect(Klass.prototype).toHaveString("name");
45			});
46
47			it("should have a prototype property named 'message'", () => {
48			expect(Klass.prototype).toHaveString("message");
49			});
50
51			it("should have a prototype property named 'code'", () => {
52			expect(Klass.prototype).toHaveMember("code");
53			});
54			}
55
56			// check Object methods
57			it("should have a prototype method named 'toString()'", () => {
58			expect(Klass.prototype).toHaveMethod("toString");
59			});
60
61			// check inherited methods
62			if (!first) {
63			it("should have a prototype method named 'native()'", () => {
64			expect(Klass.prototype).toHaveMethod("native");
65			});
66			}
67
68			// :: EXTENDED PROTOTYPE
69
70			// check extended properties
71			if (first) {
72			it("should have a prototype property named 'name'", () => {
73			expect(Klass.prototype).toHaveString("name");
74			});
75
76			it("should have a prototype property named 'message'", () => {
77			expect(Klass.prototype).toHaveString("message");
78			});
79
80			it("should have a prototype property named 'code'", () => {
81			expect(Klass.prototype).toHaveMember("code");
82			});
83
84			it("should have a prototype method named 'native()'", () => {
85			expect(Klass.prototype).toHaveMethod("native");
86			});
87			}
88
89			// :: PROTOTYPE VALUES
90
91			it("should have the 'class' name in the prototype property named 'name'", () => {
92			expect(Klass.prototype.name).toEqual(klassName);
93			});
94
95			it("should have a dummy default value as message", () => {
96			expect(Klass.prototype.message).toEqual("thrown");
97			});
98
99			it("should have a null default value as code", () => {
100			expect(Klass.prototype.code).toBeNull();
101			});
102
103			// :: CONSTRUCTOR
104
105			it("should instantiate without parameters", () => {
106			instanceNoParameters(Klass, testNoErrors, third);
107			testNoErrors(() => new Klass());
108			});
109
110			it("should instantiate with parameters", () => {
111			instanceParameters(Klass, testNoErrors, testNoErrors, testNoErrors, third);
112			});
113
114			// use the tests according to the hierarchy level
115			if (third) {
116			testThird(Klass);
117			} else {
118			test(Klass);
119			}
120
121			});
122
123			};
124
125			// Tests that a function doesn't throw any Error
126			function testNoErrors(fn) {
127			expect(fn).not.toThrowError("parameter 'name' must be a 'string'");
128			expect(fn).not.toThrowError("parameter 'message' must be a 'string'");
129			expect(fn).not.toThrowError("parameter 'code' must be a 'number'");
130			}
131
132			// Tests instantiation of a class without parameters (undefined, null or none).
133			function instanceNoParameters(Klass, fn, third) {
134			let arg1, arg2, arg3, test;
135			test = (() => new Klass(arg1, arg2, arg3));
136			for (let i = 0; i < 2; i += 1) {
137			arg1 = (i % 2 === 0 ? undefined : null);
138			for (let j = 0; j < 2; j += 1) {
139			arg2 = (j % 2 === 0 ? undefined : null);
140			if (third) {
141			fn(test);
142			} else {
143			for (let e = 0; e < 2; e += 1) {
144			arg3 = (e % 2 === 0 ? undefined : null);
145			fn(test);
146			}
147			}
148			}
149			}
150			}
151
152			// Tests instantiation of a class with parameters.
153			function instanceParameters(Klass, fn1, fn2, fn3, third) {
154			let arg1, arg2, arg3, test3, args1, args2, args3;
155			const test1 = (() => new Klass(arg1));
156			const test2 = (() => new Klass(arg1, arg2));
157			if (third) {
158			test3 = (() => null);
159			args1 = [undefined, null, Klass.prototype.message];
160			args2 = [undefined, null, Math.round(Math.random() * 0xFFFFFFFF)];
161			args3 = [];
162			} else {
163			test3 = (() => new Klass(arg1, arg2, arg3));
164			args1 = [undefined, null, Klass.prototype.name];
165			args2 = [undefined, null, Klass.prototype.message];
166			args3 = [undefined, null, Math.round(Math.random() * 0xFFFFFFFF)];
167			}
168			for (let i = 0; i < args1.length; i += 1) {
169			arg1 = args1[i];
170			fn1(test1);
171			for (let j = 0; j < args2.length; j += 1) {
172			arg2 = args2[j];
173			fn2(test2);
174			for (let e = 0; !third && e < args3.length; e += 1) {
175			arg3 = args3[e];
176			fn3(test3);
177			}
178			}
179			}
180			}
181
182			// Loops for each parameter of the Klass constructor.
183			// If the iteration is even, the parameter is defined.
184			// If the iteration is odd, the parameter is null.
185			function instanceDefinedOrNull(Klass, name, message, code, fn1, fn2, fn3, third) {
186			for (let i = 0; i < 2; i += 1) {
187			const even1 = (i % 2 === 0);
188			const arg1 = (even1 ? (third ? message : name) : null);
189			const source1 = new Klass(arg1);
190			fn1(source1, even1);
191			for (let j = 0; j < 2; j += 1) {
192			const even2 = (j % 2 === 0);
193			const arg2 = (even2 ? (third ? code : message) : null);
194			const source2 = new Klass(arg1, arg2);
195			fn2(source2, even1, even2);
196			for (let e = 0; !third && e < 2; e += 1) {
197			const even3 = (e % 2 === 0);
198			const arg3 = (even3 ? code : null);
199			const source3 = new Klass(arg1, arg2, arg3);
200			fn3(source3, even1, even2, even3);
201			}
202			}
203			}
204			}
205
206			// Loops for each parameter of the Klass constructor using wrong types to test Error throwing.
207			function instanceThrowErrors(Klass, fn1, fn2, fn3, third) {
208			let arg1, arg2, arg3, test33, test32, test31, test21, test22, test11, len1, len2, len3;
209			const noStr = [{}, true, false, 42, 3.1416, -42, -3.1416, () => null];
210			const noNmb = [{}, true, false, '', "qwerty", () => null];
211			len1 = noStr.length;
212			if (third) {
213			len2 = noNmb.length;
214			len3 = 0;
215			test33 = test32 = test31 = (() => null);
216			} else {
217			len2 = len1;
218			len3 = noNmb.length;
219			test33 = (() => new Klass(arg1, arg2, arg3));
220			test32 = (() => new Klass(null, arg2, arg3));
221			test31 = (() => new Klass(null, null, arg3));
222			}
223			test22 = (() => new Klass(arg1, arg2));
224			test21 = (() => new Klass(null, arg2));
225			test11 = (() => new Klass(arg1));
226			if (typeof Symbol === "function") {
227			noStr.push(Symbol("symbol"));
228			noNmb.push(Symbol("symbol"));
229			}
230			for (let i = 0; i < len1; i += 1) {
231			arg1 = noStr[i];
232			fn1(test11);
233			for (let j = 0; j < len2; j += 1) {
234			arg2 = (third ? noNmb[j] : noStr[j]);
235			fn2(test21, test22);
236			for (let e = 0; !third && e < len3; e += 1) {
237			arg3 = noNmb[e];
238			fn3(test31, test32, test33);
239			}
240			}
241			}
242			}
243
244			// Tests classes that are a third level subclass, meaning that they require 2 arguments (message and code).
245			function testThird(Klass) {
246
247			// :: CONSTRUCTOR
248
249			it("should throw an Error if 'message' or 'code' are invalid parameters", () => {
250			instanceThrowErrors(Klass, (test11) => {
251			expect(test11).toThrowError("parameter 'message' must be a 'string'");
252			}, (test21, test22) => {
253			expect(test21).toThrowError("parameter 'code' must be a 'number'");
254			expect(test22).toThrowError("parameter 'message' must be a 'string'");
255			}, null, true);
256			});
257
258			// :: MEMBER PROPERTIES
259
260			const message = "asdf";
261			const code = Math.round(Math.random() * 0xFFFFFFFF);
262
263			it("should have all correct properties once instantiated", () => {
264			instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
265			if (even) {
266			expect(instance.name).toEqual(Klass.prototype.name);
267			expect(instance.message).toEqual(message);
268			} else {
269			expect(instance.name).toEqual(Klass.prototype.name);
270			expect(instance.message).toEqual(Klass.prototype.message);
271			}
272			expect(instance.code).toBeNull();
273			}, (instance, even1, even2) => {
274			expect(instance.name).toEqual(Klass.prototype.name);
275			expect(instance.message).toEqual(even1 ? message : Klass.prototype.message);
276			expect(instance.code).toEqual(even2 ? code : null);
277			}, null, true);
278			});
279
280			// :: MEMBER METHODS
281
282			it("#toString()", () => {
283			instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
284			let exp;
285			if (even) {
286			exp = Klass.prototype.name + ": " + message + '.';
287			} else {
288			exp = Klass.prototype.name + ": " + Klass.prototype.message + '.';
289			}
290			expect(instance.toString()).toEqual(exp);
291			}, (instance, even1, even2) => {
292			let exp;
293			exp = Klass.prototype.name;
294			exp += (even2 ? " (0x" + code.toString(16) + "):" : ':' ) + ' ';
295			exp += (even1 ? message : Klass.prototype.message) + '.';
296			expect(instance.toString()).toEqual(exp);
297			}, null, true);
298			});
299
300			it("#native()", () => {
301			instanceDefinedOrNull(Klass, null, message, code, (instance, even) => {
302			const exp = (even ? message : Klass.prototype.message);
303			expect(instance.native()).toEqual(new Error(exp));
304			}, (instance, even1) => {
305			const exp = (even1 ? message : Klass.prototype.message);
306			expect(instance.native()).toEqual(new Error(exp));
307			}, null, true);
308			});
309
310			}
311
312			// Tests classes that require 3 arguments (name, message and code).
313			function test(Klass) {
314
315			// :: CONSTRUCTOR
316
317			it("should throw an Error if 'message' or 'code' are invalid parameters", () => {
318			instanceThrowErrors(Klass, (test11) => {
319			expect(test11).toThrowError("parameter 'name' must be a 'string'");
320			}, (test21, test22) => {
321			expect(test22).toThrowError("parameter 'name' must be a 'string'");
322			expect(test21).toThrowError("parameter 'message' must be a 'string'");
323			}, (test31, test32, test33) => {
324			expect(test33).toThrowError("parameter 'name' must be a 'string'");
325			expect(test32).toThrowError("parameter 'message' must be a 'string'");
326			expect(test31).toThrowError("parameter 'code' must be a 'number'");
327			}, false);
328			});
329
330			// :: MEMBER PROPERTIES
331
332			const name = "qwerty";
333			const message = "asdf";
334			const code = Math.round(Math.random() * 0xFFFFFFFF);
335
336			it("should have all correct properties once instantiated", () => {
337			instanceDefinedOrNull(Klass, name, message, code, (instance, even) => {
338			if (even) {
339			expect(instance.name).toEqual(name);
340			expect(instance.message).toEqual(Klass.prototype.message);
341			} else {
342			expect(instance.name).toEqual(Klass.prototype.name);
343			expect(instance.message).toEqual(Klass.prototype.message);
344			}
345			expect(instance.code).toBeNull();
346			}, (instance, even1, even2) => {
347			expect(instance.name).toEqual(even1 ? name : Klass.prototype.name);
348			expect(instance.message).toEqual(even2 ? message : Klass.prototype.message);
349			expect(instance.code).toBeNull();
350			}, (instance, even1, even2, even3) => {
351			expect(instance.name).toEqual(even1 ? name : Klass.prototype.name);
352			expect(instance.message).toEqual(even2 ? message : Klass.prototype.message);
353			expect(instance.code).toEqual(even3 ? code : null);
354			}, false);
355			});
356
357			// :: MEMBER METHODS
358
359			it("#toString()", () => {
360			instanceDefinedOrNull(Klass, name, message, code, (instance, even) => {
361			let exp;
362			if (even) {
363			exp = name + ": " + Klass.prototype.message + '.';
364			} else {
365			exp = Klass.prototype.name + ": " + Klass.prototype.message + '.';
366			}
367			expect(instance.toString()).toEqual(exp);
368			}, (instance, even1, even2) => {
369			let exp;
370			exp = (even1 ? name : Klass.prototype.name) + ':';
371			exp += ' ' + (even2 ? message : Klass.prototype.message) + '.';
372			expect(instance.toString()).toEqual(exp);
373			}, (instance, even1, even2, even3) => {
374			let exp;
375			exp = (even1 ? name : Klass.prototype.name);
376			exp += (even3 ? " (0x" + code.toString(16) + "):" : ':') + ' ';
377			exp += (even2 ? message : Klass.prototype.message) + '.';
378			expect(instance.toString()).toEqual(exp);
379			}, false);
380			});
381
382			it("#native()", () => {
383			instanceDefinedOrNull(Klass, name, message, code, (instance) => {
384			const exp = Klass.prototype.message;
385			expect(instance.native()).toEqual(new Error(exp));
386			}, (instance, even1, even2) => {
387			const exp = (even2 ? message : Klass.prototype.message);
388			expect(instance.native()).toEqual(new Error(exp));
389			}, (instance, even1, even2) => {
390			const exp = (even2 ? message : Klass.prototype.message);
391			expect(instance.native()).toEqual(new Error(exp));
392			}, false);
393			});
394
395			}

EgaLabs / node-ejsception

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hierarchy-helper.js ➔ instanceDefinedOrNull B

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