[Init] Initial commit - NetMesh terminal manager

components/terminalLayer/terminalThemePreview.test.ts

@@ -0,0 +1,67 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {
+  emptyTerminalThemePreview,
+  listThemePreviewSessionIds,
+  resolvePaneThemePreviewId,
+} from "./terminalThemePreview";
+
+const preview = {
+  targetSessionId: "session-a",
+  targetHostId: "host-1",
+  globalPreview: false,
+  themeId: "dracula",
+};
+
+test("follow-app mode never applies per-pane theme preview ids", () => {
+  assert.equal(
+    resolvePaneThemePreviewId(true, preview, "session-a", "host-1"),
+    undefined,
+  );
+});
+
+test("host-scoped preview applies to every session on the same host", () => {
+  assert.equal(
+    resolvePaneThemePreviewId(false, preview, "session-b", "host-1"),
+    "dracula",
+  );
+  assert.equal(
+    resolvePaneThemePreviewId(false, preview, "session-c", "host-2"),
+    undefined,
+  );
+});
+
+test("global preview applies to all sessions", () => {
+  const globalPreview = { ...preview, globalPreview: true, targetHostId: null };
+  assert.equal(
+    resolvePaneThemePreviewId(false, globalPreview, "session-z", "host-9"),
+    "dracula",
+  );
+});
+
+test("listThemePreviewSessionIds skips follow-app previews", () => {
+  const sessions = [{ id: "session-a" }, { id: "session-b" }];
+  const sessionHostsMap = new Map([
+    ["session-a", { id: "host-1" }],
+    ["session-b", { id: "host-1" }],
+  ]);
+
+  assert.deepEqual(
+    listThemePreviewSessionIds(sessions, sessionHostsMap, preview, true),
+    [],
+  );
+  assert.deepEqual(
+    listThemePreviewSessionIds(sessions, sessionHostsMap, preview, false),
+    ["session-a", "session-b"],
+  );
+});
+
+test("emptyTerminalThemePreview returns a cleared preview state", () => {
+  assert.deepEqual(emptyTerminalThemePreview(), {
+    targetSessionId: null,
+    targetHostId: null,
+    globalPreview: false,
+    themeId: null,
+  });
+});