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fkereki
2018-05-30 23:11:12 -04:00
parent 66fdef2908
commit f6da619b33
6 changed files with 439 additions and 117 deletions
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chapter05/package-lock.json
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+146 -109
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@@ -1114,7 +1114,7 @@
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"integrity": "sha512-BRYS7jsNkfLAqGu4dZW3kp6CmqiWKrComvfsIMYdsnpPre7g8BIw63nWRyX69vxyLYvZdszcEyxJkJmILXd/pA==",
"version": "3.0.0-rc6",
"resolved": "https://registry.npmjs.org/winston/-/winston-3.0.0-rc6.tgz",
"integrity": "sha512-4QwLccPbU/aJMA+j6uYTQ8TobwLKPWhpceJZwz1lkQ+wYv7bxGyAHIdbfEOrxsKHD8zRCcgCXPbbpV3BDRD1rw==",
"requires": {
"async": "2.6.1",
"diagnostics": "1.1.0",
@@ -9337,13 +9371,16 @@
"one-time": "0.0.4",
"stack-trace": "0.0.10",
"triple-beam": "1.3.0",
"winston-transport": "3.2.1"
"winston-transport": "4.0.0"
}
},
"winston-transport": {
"version": "3.2.1",
"resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-3.2.1.tgz",
"integrity": "sha512-WPqbdAmMK/kfWCWKM2bA1o997wWPZ0jg5NpO8JPqoaDZgCiZnFpIEddcf7Ur4UZV2sYRUdySVBWKx0+gQQ/jrg=="
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.0.0.tgz",
"integrity": "sha512-0f2989AvU0GAzj8R7sG2/VWunlG9xd10eEQ3fP+MbP04249DXECww5H5HHvk5zY3Eflz7DtA5NTNXal5+RmAYQ==",
"requires": {
"triple-beam": "1.3.0"
}
},
"wordwrap": {
"version": "1.0.0",
chapter05/package.json
+10 -8
View File
@@ -14,14 +14,13 @@
"flow": "flow",
"flow-coverage": "flow-coverage-report",
"eslint": "eslint src",
"test": "echo \"Error: no test specified\" && exit 1"
"test": "jest out/"
},
"author": "Federico Kereki",
"license": "ISC",
"babel": {
"presets": [
"env",
"node",
"flow"
]
},
@@ -33,7 +32,8 @@
"parser": "babel-eslint",
"env": {
"node": true,
"es6": true
"es6": true,
"jest": true
},
"extends": [
"eslint:recommended",
@@ -78,24 +78,26 @@
"dotenv": "^5.0.1",
"express": "^4.16.3",
"helmet": "^3.12.1",
"jsonwebtoken": "^8.2.1",
"jsonwebtoken": "^8.2.2",
"mariasql": "^0.2.6",
"morgan": "^1.9.0",
"winston": "^3.0.0-rc5"
"node-mocks-http": "^1.7.0",
"winston": "^3.0.0-rc6"
},
"devDependencies": {
"babel-eslint": "^8.2.2",
"babel-jest": "^23.0.1",
"babel-preset-env": "^1.7.0",
"babel-preset-flow": "^6.23.0",
"eslint": "^4.19.0",
"eslint-config-recommended": "^2.0.0",
"eslint-plugin-flowtype": "^2.47.1",
"eslint-plugin-flowtype": "^2.48.0",
"flow-bin": "^0.68.0",
"flow-coverage-report": "^0.5.0",
"flow-remove-types": "^1.2.3",
"flow-typed": "^2.4.0",
"jest": "^23.0.1",
"jest": "^23.1.0",
"nodemon": "^1.17.5",
"prettier": "^1.11.1"
"prettier": "^1.13.3"
}
}
chapter05/src/restful_regions.js
+182
View File
@@ -0,0 +1,182 @@
/* @flow */
"use strict";
const getRegion = async (
res: any,
dbConn: any,
country: ?string,
region: ?string
) => {
try {
let sqlQuery = "";
if (country == null) {
sqlQuery = `
SELECT rr.*
FROM regions rr
JOIN countries cc
ON cc.countryCode=rr.countryCode
ORDER BY cc.countryCode, rr.regionCode
`;
} else if (region == null) {
sqlQuery = `
SELECT 1
FROM countries
WHERE countryCode="${country}"
`;
const countries = await dbConn.query(sqlQuery);
if (countries.length === 0) {
return res.status(404).send("Country not found");
}
sqlQuery = `
SELECT rr.*
FROM regions rr
JOIN countries cc
ON cc.countryCode=rr.countryCode
WHERE rr.countryCode="${country}"
ORDER BY rr.regionCode
`;
} else {
sqlQuery = `
SELECT rr.*
FROM regions rr
JOIN countries cc
ON cc.countryCode=rr.countryCode
WHERE rr.countryCode="${country}"
AND rr.regionCode="${region}"
`;
}
const regions = await dbConn.query(sqlQuery);
if (regions.length > 0 || region === null) {
res
.status(200)
.set("Content-Type", "application/json")
.send(JSON.stringify(regions));
} else {
res.status(404).send("Not found");
}
} catch (e) {
res.status(500).send("Server error");
}
};
const deleteRegion = async (
res: any,
dbConn: any,
country: string,
region: string
) => {
try {
const sqlCities = `
SELECT 1 FROM cities
WHERE countryCode="${country}"
AND regionCode="${region}"
LIMIT 1
`;
const cities = await dbConn.query(sqlCities);
if (cities.length > 0) {
res.status(405).send("Cannot delete a region with cities");
} else {
const deleteRegion = `
DELETE FROM regions
WHERE countryCode="${country}"
AND regionCode="${region}"
`;
const result = await dbConn.query(deleteRegion);
if (result.info.affectedRows > 0) {
res.status(204).send();
} else {
res.status(404).send("Region not found");
}
}
} catch (e) {
res.status(500).send("Server error");
}
};
const postRegion = async (
res: any,
dbConn: any,
country: string,
name: string
) => {
if (!name) {
return res.status(400).send("Missing name");
}
try {
const sqlCountry = `
SELECT 1
FROM countries
WHERE countryCode="${country}"
`;
const countries = await dbConn.query(sqlCountry);
if (countries.length === 0) {
res.status(403).send("Country must exist");
}
const sqlGetId = `
SELECT MAX(CAST(regionCode AS INTEGER)) AS maxr
FROM regions
WHERE countryCode="${country}"
`;
const regions = await dbConn.query(sqlGetId);
const newId =
regions.length === 0 ? 1 : 1 + Number(regions[0].maxr);
const sqlAddRegion = `
INSERT INTO regions SET
countryCode="${country}",
regionCode="${newId}",
regionName="${name}"
`;
const result = await dbConn.query(sqlAddRegion);
if (result.info.affectedRows > 0) {
res
.status(201)
.header("Location", `/regions/${country}/${newId}`)
.send("Region created");
} else {
res.status(409).send("Region not created");
}
} catch (e) {
res.status(500).send("Server error");
}
};
const putRegion = async (
res: any,
dbConn: any,
country: string,
region: string,
name: string
) => {
if (!name) {
return res.status(400).send("Missing name");
}
try {
const sqlUpdateRegion = `
UPDATE regions
SET regionName="${name}"
WHERE countryCode="${country}"
AND regionCode="${region}"
`;
const result = await dbConn.query(sqlUpdateRegion);
if (result.info.affectedRows > 0) {
res.status(204).send();
} else {
res.status(409).send("Region not updated");
}
} catch (e) {
res.status(500).send("Server error");
}
};
module.exports = { getRegion, deleteRegion, postRegion, putRegion };
chapter05/src/restful_regions.test.js
+44
View File
@@ -0,0 +1,44 @@
/* @flow */
"use strict";
const { deleteRegion } = require("./restful_regions");
const mockRes = require("node-mocks-http");
describe("deleteRegion", () => {
it("should not delete a region with cities", async () => {
const mDb = { query: jest.fn() };
mDb.query.mockReturnValueOnce(Promise.resolve([1]));
const mRes = new mockRes.createResponse();
await deleteRegion(mRes, mDb, "UY", "11");
expect(mRes.statusCode).toBe(405);
});
it("should delete a region without cities", async () => {
const mDb = { query: jest.fn() };
mDb.query
.mockReturnValueOnce(Promise.resolve([]))
.mockReturnValueOnce(
Promise.resolve({
info: { affectedRows: 1 }
})
);
const mRes = new mockRes.createResponse();
await deleteRegion(mRes, mDb, "UY", "11");
expect(mRes.statusCode).toBe(204);
});
it("should produce a 404 for non-existing region", async () => {
const mDb = { query: jest.fn() };
mDb.query
.mockReturnValueOnce(Promise.resolve([]))
.mockReturnValueOnce(
Promise.resolve({
info: { affectedRows: 0 }
})
);
const mRes = new mockRes.createResponse();
await deleteRegion(mRes, mDb, "UY", "11");
expect(mRes.statusCode).toBe(404);
});
});
chapter05/src/roundmath.js
+34
View File
@@ -0,0 +1,34 @@
/* @flow */
"use strict";
// These won't be exported:
const roundToCents = (x: number): number => Math.round(x * 100) / 100;
const changeSign = (x: number): number => -x;
// The following will be exported:
const addR = (x: number, y: number): number => roundToCents(x + y);
const subR = (x: number, y: number): number => addR(x, changeSign(y));
const multR = (x: number, y: number): number => roundToCents(x * y);
const divR = (x: number, y: number): number => {
if (y === 0) {
throw new Error("Divisor must be nonzero");
} else {
return roundToCents(x / y);
}
};
/*
NOTES:
1. Exports are all together, at the end, per convention
2. roundToCents and changeSign are not exported, on purpose
*/
exports.addR = addR;
exports.subR = subR;
exports.multR = multR;
exports.divR = divR;
chapter05/src/roundmath.test.js
+23
View File
@@ -0,0 +1,23 @@
/* @flow */
"use strict";
const rm = require("./roundmath");
describe("addR", () => {
it("should add first and round later", () => {
expect(rm.addR(1.505, 2.505)).toBe(4.01);
});
it("should handle negatives", () => {
expect(rm.addR(3.15, -2.149)).toBe(1.0);
});
});
describe("divR", () => {
it("should divide first, then round", () => {
expect(rm.divR(22.96, 0.001)).toBe(22960);
});
it("should not divide by zero", () =>
expect(() => rm.divR(22, 0)).toThrow());
});