Add tests for utils

4 files changed, 179 insertions, 5 deletions

diff --git a/src/config/config.js b/src/config/config.js
index 9d6d40e..0570e1c 100644
--- a/src/config/config.js
+++ b/src/config/config.js
@@ -7,9 +7,9 @@ import { name, version as packageVersion } from '../../package.json';
  */
 
 export const apollo = {
-	uri: import.meta.env.VITE_APOLLO_SERVER,
-	name,
-	version: packageVersion
+  uri: import.meta.env.VITE_APOLLO_SERVER,
+  name,
+  version: packageVersion
 };
 
 export const socketServer = import.meta.env.FORUM_SOCKET_SERVER;
diff --git a/src/utils/glyph_hash.js b/src/utils/glyph_hash.js
index 13a81a8..3758601 100644
--- a/src/utils/glyph_hash.js
+++ b/src/utils/glyph_hash.js
@@ -1,6 +1,28 @@
 const internals = {
+  kDehyphenRegex: /[-]/g,
   kSplitterRegex: /.{1,8}/g,
-  kGlyphs: ['☽', '☆', '♢', '♡', '╱', '╲', '╳', '〰', '▷', '⏊', '〒', '▢', '◯', '⏃', '⏀', '⏆']
+  kGlyphs: [
+    '☽',
+    '☆',
+    '♢',
+    '♡',
+    '╱',
+    '╲',
+    '╳',
+    '〰',
+    '▷',
+    '⏊',
+    '〒',
+    '▢',
+    '◯',
+    '⏃',
+    '⏀',
+    '⏆'
+  ],
+  unexpectedUUIDLength: class UnexpectedUUIDLength extends Error {
+    name = 'UnexpectedUUIDLength';
+    message = 'The provided string was not a valid UUIDv4, please provide a 32 character long string'
+  }
 };
 
 // Return a glyph with color based on a 4 byte fragment of a UUIDv4
@@ -16,6 +38,12 @@ const getGlyphHashFragment = function (uuidFragment) {
 // Return an array of glyphs based on a UUIDv4
 export const getGlyphHash = function (uuid) {
 
-  const hashFragments = uuid.replace(/[-]/g, '').match(internals.kSplitterRegex);
+  const dehyphenedUuid = uuid.replace(/[-]/g, '');
+
+  if (dehyphenedUuid.length !== 32) {
+    throw new internals.unexpectedUUIDLength();
+  }
+
+  const hashFragments = dehyphenedUuid.match(internals.kSplitterRegex);
   return hashFragments.map(getGlyphHashFragment);
 };
diff --git a/src/utils/glyph_hash.test.js b/src/utils/glyph_hash.test.js
new file mode 100644
index 0000000..e7a127b
--- /dev/null
+++ b/src/utils/glyph_hash.test.js
@@ -0,0 +1,63 @@
+import { getGlyphHash } from './glyph_hash';
+
+
+describe('readableTime', () => {
+
+  test('it throws an exception if the string is too short', () => {
+
+    expect(() => {
+
+      getGlyphHash('short');
+    }).toThrow();
+
+    expect(() => {
+
+      getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
+    }).toThrow();
+
+    expect(() => {
+
+      getGlyphHash('abcdefghijklmnopqrstuvwxyzABCDEF');
+    }).not.toThrow();
+  });
+
+  test('it treats UUIDs with hyphens the same as those without', () => {
+
+    const uuidWithHyphens = 'f7722355-2285-46c0-a55f-3483a826f3a6';
+    const uuidWithoutHyphens = 'f7722355228546c0a55f3483a826f3a6';
+
+    expect(getGlyphHash(uuidWithHyphens)).toEqual(getGlyphHash(uuidWithoutHyphens));
+  });
+
+  describe('it generates four sets of glyphs and colors', () => {
+
+    const state = {};
+
+    beforeEach(() => {
+
+      state.glyphHash = getGlyphHash('f7722355-2285-46c0-a55f-3483a826f3a6');
+    });
+
+    test('there should be four glyph fragments', () => {
+
+      expect(state.glyphHash.length).toBe(4);
+    });
+
+    test('each fragment should have a single character glyph', () => {
+
+      for (const glyphHashFragment of state.glyphHash) {
+        expect(typeof glyphHashFragment.glyph).toBe('string');
+        expect(glyphHashFragment.glyph.length).toBe(1);
+      }
+    });
+
+    test('each fragment should have a hexadecimal color', () => {
+
+      for (const glyphHashFragment of state.glyphHash) {
+        expect(typeof glyphHashFragment.color).toBe('string');
+        expect(glyphHashFragment.color.length).toBe(7);
+        expect(glyphHashFragment.color).toEqual(expect.stringMatching(/#[0-9a-f]{6}/));
+      }
+    });
+  });
+});
diff --git a/src/utils/readable_time.test.js b/src/utils/readable_time.test.js
new file mode 100644
index 0000000..5d8ba27
--- /dev/null
+++ b/src/utils/readable_time.test.js
@@ -0,0 +1,83 @@
+import { readableTime } from './readable_time';
+
+describe('readableTime', () => {
+
+  test('it shows negative time as 0', () => {
+
+    const response = readableTime(-1000);
+
+    expect(response.count).toBe(0);
+    expect(response.label).toContain('seconds');
+  });
+
+  test('uses seconds as the smallest unit', () => {
+
+    const response = readableTime(10);
+
+    expect(response.count).toBe(0);
+    expect(response.label).toContain('seconds');
+  });
+
+  test('correctly divides miliseconds into seconds', () => {
+
+    const response = readableTime(4000);
+
+    expect(response.count).toBe(4);
+  });
+
+  test('uses seconds if the time is < 1 minute', () => {
+
+    const response = readableTime(59 * 1000);
+
+    expect(response.label).toContain('seconds');
+  });
+
+  test('correctly divides miliseconds into minutes', () => {
+
+    const response = readableTime(2 * 60 * 1000);
+
+    expect(response.count).toBe(2);
+  });
+
+  test('uses minutes if the time is < 1 hour', () => {
+
+    const response = readableTime(59 * 60 * 1000);
+
+    expect(response.label).toContain('minutes');
+  });
+
+  test('correctly divides miliseconds into hours', () => {
+
+    const response = readableTime(2 * 60 * 60 * 1000);
+
+    expect(response.count).toBe(2);
+  });
+
+  test('uses hours if the time is < 1 days', () => {
+
+    const response = readableTime(23 * 60 * 60 * 1000);
+
+    expect(response.label).toContain('hours');
+  });
+
+  test('correctly divides miliseconds into days', () => {
+
+    const response = readableTime(2 * 24 * 60 * 60 * 1000);
+
+    expect(response.count).toBe(2);
+  });
+
+  test('uses days if the time is >= 1 day', () => {
+
+    const response = readableTime(364 * 24 * 60 * 60 * 1000);
+
+    expect(response.label).toContain('days');
+  });
+
+  test('uses days as the maximum unit', () => {
+
+    const response = readableTime(Number.MAX_VALUE);
+
+    expect(response.label).toContain('days');
+  });
+});