test: add unit tests for parsePickerInput in picker.ts (#2421)

Agent: test-engineer

Co-authored-by: B <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 3 people

packages/cli/src/__tests__/picker.test.ts

@@ -0,0 +1,105 @@
+import { describe, expect, it } from "bun:test";
+import { parsePickerInput } from "../picker";
+
+describe("parsePickerInput", () => {
+  it("parses three-field tab-separated lines (value, label, hint)", () => {
+    const result = parsePickerInput("us-east-1\tVirginia\tRecommended");
+    expect(result).toEqual([
+      {
+        value: "us-east-1",
+        label: "Virginia",
+        hint: "Recommended",
+      },
+    ]);
+  });
+
+  it("parses two-field lines (value, label) with no hint", () => {
+    const result = parsePickerInput("us-east-1\tVirginia");
+    expect(result).toEqual([
+      {
+        value: "us-east-1",
+        label: "Virginia",
+      },
+    ]);
+  });
+
+  it("uses value as label when only value is provided", () => {
+    const result = parsePickerInput("us-east-1");
+    expect(result).toEqual([
+      {
+        value: "us-east-1",
+        label: "us-east-1",
+      },
+    ]);
+  });
+
+  it("filters empty and whitespace-only lines", () => {
+    const result = parsePickerInput("a\tAlpha\n\n   \nb\tBeta\n");
+    expect(result).toEqual([
+      {
+        value: "a",
+        label: "Alpha",
+      },
+      {
+        value: "b",
+        label: "Beta",
+      },
+    ]);
+  });
+
+  it("handles mixed field counts in a single input", () => {
+    const input = [
+      "val1\tLabel1\tHint1",
+      "val2\tLabel2",
+      "val3",
+    ].join("\n");
+    const result = parsePickerInput(input);
+    expect(result).toEqual([
+      {
+        value: "val1",
+        label: "Label1",
+        hint: "Hint1",
+      },
+      {
+        value: "val2",
+        label: "Label2",
+      },
+      {
+        value: "val3",
+        label: "val3",
+      },
+    ]);
+  });
+
+  it("returns empty array for empty input", () => {
+    expect(parsePickerInput("")).toEqual([]);
+    expect(parsePickerInput("   ")).toEqual([]);
+    expect(parsePickerInput("\n\n")).toEqual([]);
+  });
+
+  it("trims whitespace from fields", () => {
+    const result = parsePickerInput("  val \t  Label \t  Hint  ");
+    expect(result).toEqual([
+      {
+        value: "val",
+        label: "Label",
+        hint: "Hint",
+      },
+    ]);
+  });
+
+  it("parses multiple lines correctly", () => {
+    const input = "us-central1-a\tIowa\nus-east1-b\tVirginia";
+    const result = parsePickerInput(input);
+    expect(result).toEqual([
+      {
+        value: "us-central1-a",
+        label: "Iowa",
+      },
+      {
+        value: "us-east1-b",
+        label: "Virginia",
+      },
+    ]);
+  });
+});