Fix memory LLM preset auto detection

tests/llm-preset-utils.mjs

@@ -0,0 +1,134 @@
+import assert from "node:assert/strict";
+
+import {
+  isSameLlmConfigSnapshot,
+  normalizeLlmPresetMap,
+  resolveActiveLlmPresetName,
+  sanitizeLlmPresetSettings,
+} from "../llm-preset-utils.js";
+
+assert.equal(
+  isSameLlmConfigSnapshot(
+    {
+      llmApiUrl: " https://example.com/v1 ",
+      llmApiKey: " sk-test ",
+      llmModel: " model-a ",
+    },
+    {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-test",
+      llmModel: "model-a",
+    },
+  ),
+  true,
+);
+
+const normalizedMap = normalizeLlmPresetMap({
+  Alpha: {
+    llmApiUrl: " https://example.com/v1 ",
+    llmApiKey: " sk-alpha ",
+    llmModel: " model-a ",
+  },
+  "": {
+    llmApiUrl: "https://bad.example/v1",
+    llmApiKey: "sk-bad",
+    llmModel: "bad-model",
+  },
+  Broken: {
+    llmApiUrl: "https://broken.example/v1",
+    llmApiKey: 42,
+    llmModel: "broken",
+  },
+});
+assert.equal(normalizedMap.changed, true);
+assert.deepEqual(normalizedMap.presets, {
+  Alpha: {
+    llmApiUrl: "https://example.com/v1",
+    llmApiKey: "sk-alpha",
+    llmModel: "model-a",
+  },
+});
+
+const sanitized = sanitizeLlmPresetSettings({
+  llmPresets: {
+    Alpha: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-alpha",
+      llmModel: "model-a",
+    },
+  },
+  llmActivePreset: "Missing",
+});
+assert.equal(sanitized.changed, true);
+assert.equal(sanitized.activePreset, "");
+
+const uniqueMatchSettings = {
+  llmApiUrl: "https://example.com/v1",
+  llmApiKey: "sk-alpha",
+  llmModel: "model-a",
+  llmPresets: {
+    Alpha: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-alpha",
+      llmModel: "model-a",
+    },
+    Beta: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-beta",
+      llmModel: "model-b",
+    },
+  },
+  llmActivePreset: "",
+};
+assert.equal(resolveActiveLlmPresetName(uniqueMatchSettings), "Alpha");
+
+const preservedActiveSettings = {
+  llmApiUrl: "https://example.com/v1",
+  llmApiKey: "sk-shared",
+  llmModel: "shared-model",
+  llmPresets: {
+    Alpha: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-shared",
+      llmModel: "shared-model",
+    },
+    Beta: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-shared",
+      llmModel: "shared-model",
+    },
+  },
+  llmActivePreset: "Beta",
+};
+assert.equal(resolveActiveLlmPresetName(preservedActiveSettings), "Beta");
+
+const ambiguousSettings = {
+  llmApiUrl: "https://example.com/v1",
+  llmApiKey: "sk-shared",
+  llmModel: "shared-model",
+  llmPresets: {
+    Alpha: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-shared",
+      llmModel: "shared-model",
+    },
+    Beta: {
+      llmApiUrl: "https://example.com/v1",
+      llmApiKey: "sk-shared",
+      llmModel: "shared-model",
+    },
+  },
+  llmActivePreset: "",
+};
+assert.equal(resolveActiveLlmPresetName(ambiguousSettings), "");
+
+const noMatchSettings = {
+  llmApiUrl: "https://example.com/v1",
+  llmApiKey: "sk-gamma",
+  llmModel: "model-gamma",
+  llmPresets: uniqueMatchSettings.llmPresets,
+  llmActivePreset: "",
+};
+assert.equal(resolveActiveLlmPresetName(noMatchSettings), "");
+
+console.log("llm-preset-utils tests passed");