1 files changed, 67 insertions, 0 deletions
diff --git a/src/features/plugins/logic/workspace-row.test.ts b/src/features/plugins/logic/workspace-row.test.ts
new file mode 100644
index 0000000..4c7d29e
--- /dev/null
+++ b/src/features/plugins/logic/workspace-row.test.ts
@@ -0,0 +1,67 @@
+import type { WorkspacePluginRow } from "@dispatch/transport-contract";
+import { describe, expect, it } from "vitest";
+import { rowBlockReason, rowChecked, rowSelectable, stateLabel } from "./workspace-row";
+
+function row(overrides: Partial<WorkspacePluginRow> = {}): WorkspacePluginRow {
+  return {
+    pluginId: "mcp",
+    tier: "standard",
+    state: "undefined",
+    loaded: true,
+    locked: false,
+    ...overrides,
+  };
+}
+
+describe("rowChecked", () => {
+  it("is true only for an explicit enabled record", () => {
+    expect(rowChecked(row({ state: "enabled" }))).toBe(true);
+    expect(rowChecked(row({ state: "disabled" }))).toBe(false);
+    expect(rowChecked(row({ state: "undefined" }))).toBe(false);
+  });
+});
+
+describe("rowSelectable", () => {
+  it("is true for a loaded, unlocked row (all three states)", () => {
+    for (const state of ["enabled", "disabled", "undefined"] as const) {
+      expect(rowSelectable(row({ state }))).toBe(true);
+    }
+  });
+
+  it("is false for an UNLOADED plugin (§7 strict layering — greyed out)", () => {
+    expect(rowSelectable(row({ loaded: false, state: "disabled" }))).toBe(false);
+  });
+
+  it("is false for a LOCKED (core) row — the server refuses the PUT (409)", () => {
+    expect(rowSelectable(row({ tier: "core", locked: true, state: "enabled" }))).toBe(false);
+  });
+});
+
+describe("rowBlockReason", () => {
+  it("points at the global manager for unloaded plugins", () => {
+    const reason = rowBlockReason(row({ loaded: false }));
+    expect(reason).toContain("plugin manager");
+  });
+
+  it("explains the core lock", () => {
+    const reason = rowBlockReason(row({ tier: "core", locked: true }));
+    expect(reason).toContain("Core plugins are enabled by default");
+  });
+
+  it("prefers the unloaded reason when both apply", () => {
+    const reason = rowBlockReason(row({ loaded: false, tier: "core", locked: true }));
+    expect(reason).toContain("plugin manager");
+  });
+
+  it("is null for an interactive row", () => {
+    expect(rowBlockReason(row())).toBeNull();
+  });
+});
+
+describe("stateLabel", () => {
+  it("renders the three wire states in a uniform grammar", () => {
+    expect(stateLabel("enabled")).toBe("enabled");
+    expect(stateLabel("disabled")).toBe("disabled");
+    expect(stateLabel("undefined")).toBe("not set");
+  });
+});