Add comprehensive test coverage for Ableton effects and automation parameters

tests/ableton-automation.test.ts

@@ -3,6 +3,7 @@ import test from 'node:test';
 import {
   buildArrangementEnvelopes,
   buildClipEnvelopes,
+  convertFaderValue,
   getFaderValueAt,
 } from '../src/lib/exporters/ableton/automation';
 import { AblGroupPatternOccurrence, AblTrack } from '../src/lib/transformers/ableton';
@@ -79,3 +80,37 @@ test('uses absolute automation targets for Session clip envelopes', () => {
   assert.equal(envelopes[0].Automation.Events.FloatEvent[2]['@Time'], 1);
   assert.deepEqual(envelopes[0].LoopSlot, { Value: {} });
 });
+
+test('uses each Simpler target duration and One-Shot release direction', () => {
+  assert.equal(
+    convertFaderValue(FaderParam.REL, 1, track, false, {
+      soundLength: 10,
+      maxValue: 2000,
+      invertValue: true,
+    }),
+    0,
+  );
+  assert.equal(
+    convertFaderValue(FaderParam.REL, 0, track, false, {
+      soundLength: 10,
+      maxValue: 2000,
+      invertValue: true,
+    }),
+    2000,
+  );
+
+  const envelopes = buildClipEnvelopes(
+    occurrence,
+    {
+      [FaderParam.REL]: [
+        { session: 23000, soundLength: 2 },
+        { session: 23001, soundLength: 4, maxValue: 2000, invertValue: true },
+      ],
+    },
+    track,
+    false,
+  );
+
+  assert.equal(envelopes[0].Automation.Events.FloatEvent[2]['@Value'], 1500);
+  assert.equal(envelopes[1].Automation.Events.FloatEvent[2]['@Value'], 1000);
+});