Add CI

.github/workflows/CI.yaml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v6
+
+    - name: Use Node.js
+      uses: actions/setup-node@v6
+      with:
+        node-version-file: .nvmrc
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run tests with coverage
+      run: npm run coverage
+
+    - name: Upload coverage reports to Codecov
+      uses: codecov/codecov-action@v5
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -3,3 +3,4 @@
 /coverage
 /dist
 /docs/api
+.DS_Store

.nvmrc

@@ -0,0 +1 @@
+24

README.md

@@ -1,5 +1,5 @@
-
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](LICENSE)
+[![codecov](https://codecov.io/gh/wayofthefuture/ais-nmea-decoder/graph/badge.svg)](https://codecov.io/gh/wayofthefuture/ais-nmea-decoder)
 
 ### *Currently under development...
 

src/ais-decoder.test.ts

@@ -322,6 +322,43 @@ describe('error cases', () => {
         const result = decoder.parse('!AIVDM,2,3,,,hi,*57');
         expect(result.error).toBe('Invalid fragment number for two-part message.');
     });
+
+    it('should return error in case of invalid message type', () => {
+        const result = decoder.parse(`!AIVDM,1,1,1,1,w,*20`); // w is mtype 63
+        expect(result.error).toBe('Invalid message type: 63');
+    })
+})
+
+describe('error cases for seconds session', () => {
+    it('should return missing part 1 when sending only the second part', () => {
+        const result = decoder.parse('!AIVDM,2,2,,,hi,*56');
+        expect(result.error).toBe('Part 1 missing from two-part message.');
+    })
+
+    it('should return message too old when there is a time gap in the sequence', async () => {
+        decoder.parse('!AIVDM,2,1,,,hi,*55');
+        await new Promise(resolve => setTimeout(resolve, 4000)); // 4 seconds delay
+        const result2 = decoder.parse('!AIVDM,2,2,,,hi,*56');
+        expect(result2.error).toBe('Part 2 message is too old relative to part 1.');
+    })
+
+    it('should return error when second message prefix does not match the first one', () => {
+        decoder.parse('!AIVDM,2,1,,,hi,*55');
+        const result2 = decoder.parse('!AIVDO,2,2,,,hi,*54');
+        expect(result2.error).toBe('Part 2 message does not match part 1 message prefix.');
+    })
+
+    it('should return error when second message sequence id does not match the first one', () => {
+        decoder.parse('!AIVDM,2,1,seq1,,hi,*03');
+        const result2 = decoder.parse('!AIVDM,2,2,seq2,,hi,*03');
+        expect(result2.error).toBe('Part 2 message sequence id does not match part 1 sequence id.');
+    })
+
+    it('should return error when second message channel id does not match the first one', () => {
+        decoder.parse('!AIVDM,2,1,seq1,channel1,hi,*51');
+        const result2 = decoder.parse('!AIVDM,2,2,seq1,channel2,hi,*51');
+        expect(result2.error).toBe('Part 2 message channel does not match part 1 channel.');
+    })
 })
 
 describe('isNumeric', () => {