add basic tests

tests/message-decode.test.js

@@ -0,0 +1,104 @@
+const { deepEqual, throws } = require('assert');
+const { describe, it } = require('node:test');
+const osc = require('../dist/index');
+
+const tests = [
+  {
+    description: 'simple address no args',
+    bytes: Buffer.from('2f68656c6c6f00002c000000', 'hex'),
+    expected: { address: '/hello', args: [] },
+  },
+  {
+    description: 'simple address string arg',
+    bytes: Buffer.from('2f68656c6c6f00002c7300006172673100000000', 'hex'),
+    expected: { address: '/hello', args: [{ type: 's', value: 'arg1' }] },
+  },
+  {
+    description: 'simple address integer arg',
+    bytes: Buffer.from('2f68656c6c6f00002c69000000000023', 'hex'),
+    expected: { address: '/hello', args: [{ type: 'i', value: 35 }] },
+  },
+  {
+    description: 'simple address float arg',
+    bytes: Buffer.from('2f68656c6c6f00002c660000420a0000', 'hex'),
+    expected: { address: '/hello', args: [{ type: 'f', value: 34.5 }] },
+  },
+  {
+    description: 'simple address blob arg',
+    bytes: Buffer.from('2f68656c6c6f00002c62000000000004626c6f62', 'hex'),
+    expected: { address: '/hello', args: [{ type: 'b', value: Buffer.from('blob') }] },
+  },
+  {
+    description: 'simple address True arg',
+    bytes: Buffer.from('2f68656c6c6f00002c540000', 'hex'),
+    expected: { address: '/hello', args: [{ type: 'T', value: true }] },
+  },
+  {
+    description: 'simple address False arg',
+    bytes: Buffer.from('2f68656c6c6f00002c460000', 'hex'),
+    expected: { address: '/hello', args: [{ type: 'F', value: false }] },
+  },
+];
+
+describe('OSC Message Decoding', () => {
+  tests.forEach((messageTest) => {
+    it(messageTest.description, () => {
+      const decoded = osc.messageFromBuffer(messageTest.bytes);
+      deepEqual(decoded, messageTest.expected);
+    });
+  });
+
+  it('bad address', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('68656c6c6f00002c660000420a0000', 'hex'));
+      },
+      { name: /^Error$/, message:/must start with/ }
+    );
+  });
+
+  it('bad type string', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('2f68656c6c6f000066000000420a00', 'hex'));
+      },
+      { name: /^Error$/, message:/type string must start with/ }
+    );
+  });
+
+  it('unknown type', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('2f68656c6c6f00002c7a0000420a0000', 'hex'));
+      },
+      { name: /^Error$/, message:/unknown/ }
+    );
+  });
+
+  it('float arg missing bytes', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('2f68656c6c6f00002c660000420a00', 'hex'));
+      },
+      { name: /^Error$/, message:/not enough bytes/ }
+    );
+  });
+
+  it('int arg missing bytes', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('2f68656c6c6f00002c690000000000', 'hex'));
+      },
+      { name: /^Error$/, message:/not enough bytes/ }
+    );
+  });
+
+  it('blob bytes too small', () => {
+    throws(
+      () => {
+        osc.messageFromBuffer(Buffer.from('2f68656c6c6f00002c62000000000004626c6f', 'hex'));
+      },
+      { name: /^Error$/, message:/not enough bytes/ }
+    );
+  });
+});