Add unittests for dates tools

.babelrc

@@ -4,7 +4,15 @@
             "presets": [
                 "@babel/preset-env"
             ],
-            "plugins": ["@babel/plugin-transform-modules-commonjs"]
+            "plugins": [
+                "@babel/plugin-transform-modules-commonjs",
+                ["module-resolver", {
+                    "root": ["./src"],
+                    "alias": {
+                        "@": "./src"
+                    }
+                }]
+            ]
         }
     },
     "presets": [

package.json

@@ -39,6 +39,7 @@
         "app-manifest-webpack-plugin": "^1.1.3",
         "babel-eslint": "^10.0.1",
         "babel-loader": "^8.0.4",
+        "babel-plugin-module-resolver": "^3.1.1",
         "copy-webpack-plugin": "^4.6.0",
         "css-loader": "^1.0.1",
         "eslint": "^5.9.0",

src/tools/date.spec.js

@@ -0,0 +1,160 @@
+var assert = require('assert');
+var date = require('./date');
+
+describe('Date tools', function() {
+    describe('addLeadingZeros', function () {
+        it('should add leading zeros', function () {
+            assert.equal(date.addLeadingZeros(10, 2), '10');
+            assert.equal(date.addLeadingZeros(10, 4), '0010');
+        });
+    });
+
+    describe('formatDate', function () {
+        it('should format date correctly', function () {
+            var unix = new Date(0);
+            assert.equal(date.formatDate(unix, 'MM'), '01');
+            assert.equal(date.formatDate(unix, 'DD'), '01');
+            assert.equal(date.formatDate(unix, 'YYYY'), '1970');
+            var timeZoneOffset = date.addLeadingZeros(unix.getTimezoneOffset() / 60, 2);
+            assert.equal(
+                date.formatDate(unix, 'HH'),
+                timeZoneOffset
+            );
+            assert.equal(date.formatDate(unix, 'mm'), '00');
+            assert.equal(date.formatDate(unix, 'ddd'), 'Thu');
+
+            assert.equal(
+                date.formatDate(unix, 'ddd DD/MM/YYYY HH:mm'),
+                'Thu 01/01/1970 ' + timeZoneOffset + ':00'
+            );
+        });
+    });
+
+    describe('diff', function () {
+        it('should output correct diff', function () {
+            var from = new Date(0);
+            var to = new Date(1543498512000);
+            assert.deepEqual(
+                date.diff(from, to),
+                {
+                    day: 17865,
+                    hour: 428750,
+                    millisecond: 1543498512000,
+                    minute: 25724975,
+                    month: 587,
+                    second: 1543498512,
+                    week: 2552,
+                    year: 49
+                }
+            );
+        });
+    });
+
+    describe('selectUnits', function () {
+        it('should output correct units', function () {
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(100))
+                ),
+                'second'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(30 * 1000))
+                ),
+                'second'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(40 * 60 * 1000))
+                ),
+                'minute'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(20 * 60 * 60 * 1000))
+                ),
+                'hour'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(20 * 24 * 60 * 60 * 1000))
+                ),
+                'day'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(5 * 7 * 24 * 60 * 60 * 1000))
+                ),
+                'month'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(5 * 30 * 24 * 60 * 60 * 1000))
+                ),
+                'month'
+            )
+            assert.equal(
+                date.selectUnits(
+                    date.diff(new Date(0), new Date(5 * 365 * 24 * 60 * 60 * 1000))
+                ),
+                'year'
+            )
+        });
+    });
+
+    describe('distanceInWords', function () {
+        it('should output correct distance in words', function () {
+            var now = (new Date()).getTime();
+
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 100)
+                ),
+                '0 seconds ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 30 * 1000)
+                ),
+                '30 seconds ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 40 * 60 * 1000)
+                ),
+                '40 minutes ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 20 * 60 * 60 * 1000)
+                ),
+                '20 hours ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 20 * 24 * 60 * 60 * 1000)
+                ),
+                '20 days ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 5 * 7 * 24 * 60 * 60 * 1000)
+                ),
+                'one month ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 5 * 30 * 24 * 60 * 60 * 1000)
+                ),
+                '5 months ago'
+            )
+            assert.equal(
+                date.distanceInWordsToNow(
+                    new Date(now - 5 * 365 * 24 * 60 * 60 * 1000)
+                ),
+                '5 years ago'
+            )
+        });
+    })
+});

yarn.lock

@@ -1190,6 +1190,17 @@ babel-loader@^8.0.4:
     mkdirp "^0.5.1"
     util.promisify "^1.0.0"
 
+babel-plugin-module-resolver@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-module-resolver/-/babel-plugin-module-resolver-3.1.1.tgz#881cf67e3d4b8400d5eaaefc1be44d2dc1fe404f"
+  integrity sha512-1Q77Al4ydp6nYApJ7sQ2fmgz30WuQgJZegIYuyOdbdpxenB/bSezQ3hDPsumIXGlUS4vUIv+EwFjzzXZNWtARw==
+  dependencies:
+    find-babel-config "^1.1.0"
+    glob "^7.1.2"
+    pkg-up "^2.0.0"
+    reselect "^3.0.1"
+    resolve "^1.4.0"
+
 babel-runtime@6.18.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.18.0.tgz#0f4177ffd98492ef13b9f823e9994a02584c9078"
@@ -3746,6 +3757,14 @@ finalhandler@1.1.1:
     statuses "~1.4.0"
     unpipe "~1.0.0"
 
+find-babel-config@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/find-babel-config/-/find-babel-config-1.1.0.tgz#acc01043a6749fec34429be6b64f542ebb5d6355"
+  integrity sha1-rMAQQ6Z0n+w0Qpvmtk9ULrtdY1U=
+  dependencies:
+    json5 "^0.5.1"
+    path-exists "^3.0.0"
+
 find-cache-dir@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-0.1.1.tgz#c8defae57c8a52a8a784f9e31c57c742e993a0b9"
@@ -5298,7 +5317,7 @@ json3@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/json3/-/json3-3.3.2.tgz#3c0434743df93e2f5c42aee7b19bcb483575f4e1"
 
-json5@^0.5.0:
+json5@^0.5.0, json5@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
@@ -6814,6 +6833,13 @@ pkg-dir@^3.0.0:
   dependencies:
     find-up "^3.0.0"
 
+pkg-up@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-up/-/pkg-up-2.0.0.tgz#c819ac728059a461cab1c3889a2be3c49a004d7f"
+  integrity sha1-yBmscoBZpGHKscOImivjxJoATX8=
+  dependencies:
+    find-up "^2.1.0"
+
 pluralize@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-7.0.0.tgz#298b89df8b93b0221dbf421ad2b1b1ea23fc6777"
@@ -7980,6 +8006,11 @@ requires-port@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"
 
+reselect@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/reselect/-/reselect-3.0.1.tgz#efdaa98ea7451324d092b2b2163a6a1d7a9a2147"
+  integrity sha1-79qpjqdFEyTQkrKyFjpqHXqaIUc=
+
 resize-img@^1.1.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/resize-img/-/resize-img-1.1.2.tgz#fad650faf3ef2c53ea63112bc272d95e9d92550e"