test: add some unit tests for settings

test/unit/utils/settings.spec.ts

@@ -0,0 +1,96 @@
+import { expect } from 'chai'
+import { homedir } from 'os'
+import { join } from 'path'
+
+import { getDefaultSettings, getSettingsFilePath } from '../../../src/utils/settings'
+
+describe('Settings', () => {
+  describe('getSettingsFilePath', () => {
+    let originalEnv: NodeJS.ProcessEnv
+
+    beforeEach(() => {
+      originalEnv = process.env
+      process.env = {}
+    })
+
+    afterEach(() => {
+      process.env = originalEnv
+    })
+
+    it('returns string ending with settings.json by default', () => {
+      expect(getSettingsFilePath()).to.be.a('string').and.to.match(/settings\.json$/)
+    })
+
+    it('returns string ending with given string', () => {
+      expect(getSettingsFilePath('ending')).to.be.a('string').and.to.match(/ending$/)
+    })
+
+    it('returns path begins with user\'s home dir by default', () => {
+      expect(getSettingsFilePath()).to.be.a('string').and.equal(`${join(homedir(), '.nostr')}/settings.json`)
+    })
+
+    it('returns path with NOSTR_CONFIG_DIR if set', () => {
+      process.env.NOSTR_CONFIG_DIR = '/some/path'
+
+      expect(getSettingsFilePath()).to.be.a('string').and.equal('/some/path/settings.json')
+    })
+  })
+
+  describe('getDefaultSettings', () => {
+    it('returns object with info', () => {
+      expect(getDefaultSettings())
+        .to.have.property('info')
+        .and.to.deep.equal({
+          relay_url: 'wss://nostr-ts-relay.your-domain.com',
+          name: 'nostr-ts-relay.your-domain.com',
+          description: 'A nostr relay written in Typescript.',
+          pubkey: '',
+          contact: 'operator@your-domain.com',
+        })
+    })
+
+
+    it('returns object with default limits', () => {
+      expect(getDefaultSettings())
+        .to.have.property('limits')
+        .and.to.deep.equal({
+          event: {
+            eventId: {
+              minLeadingZeroBits: 0,
+            },
+            kind: {
+              whitelist: [],
+              blacklist: [],
+            },
+            pubkey: {
+              minLeadingZeroBits: 0,
+              whitelist: [],
+              blacklist: [],
+            },
+            createdAt: {
+              maxPositiveDelta: 900, // +15 min
+              maxNegativeDelta: 0, // disabled
+            },
+          },
+          client: {
+            subscription: {
+              maxSubscriptions: 10,
+              maxFilters: 10,
+            },
+          },
+        })
+    })
+  })
+
+  // describe('loadSettings', () => {
+
+  // })
+
+  // describe('createSettings', () => {
+
+  // })
+
+  // describe('saveSettings', () => {
+
+  // })
+})