fix: respect the default for a text prompt

.changeset/cool-dogs-behave.md

@@ -0,0 +1,5 @@
+---
+"@effect/cli": patch
+---
+
+Respect the `Prompt.TextOptions.default` for a prompt created with `Prompt.text`

packages/cli/src/internal/prompt/text.ts

@@ -232,10 +232,11 @@ function handleProcess(options: Options) {
       }
       case "enter":
       case "return": {
-        return Effect.match(options.validate(state.value), {
+        const value = state.value.length > 0 ? state.value : options.default
+        return Effect.match(options.validate(value), {
           onFailure: (error) =>
             Action.NextFrame({
-              state: { ...state, error: Option.some(error) }
+              state: { ...state, value, error: Option.some(error) }
             }),
           onSuccess: (value) => Action.Submit({ value })
         })
@@ -264,6 +265,7 @@ function basePrompt(
     validate: Effect.succeed,
     ...options
   }
+
   return InternalPrompt.custom(initialState, {
     render: handleRender(opts),
     process: handleProcess(opts),

packages/cli/test/Prompt.test.ts

@@ -0,0 +1,43 @@
+import * as Prompt from "@effect/cli/Prompt"
+import * as MockTerminal from "@effect/cli/test/services/MockTerminal"
+import type { Terminal } from "@effect/platform/Terminal"
+import * as Effect from "effect/Effect"
+import * as Fiber from "effect/Fiber"
+import { describe, expect, it } from "vitest"
+
+
+
+const runEffect = <E, A>(
+  self: Effect.Effect<A, E, Terminal>
+): Promise<A> => Effect.provide(self, MockTerminal.layer).pipe(Effect.runPromise)
+
+describe("Prompt", () => {
+  describe("text", () => {
+    it("should use the prompt value when no default is provided", () =>
+      Effect.gen(function*() {
+        const prompt = Prompt.text({
+          message: "This does not have a default",
+        })
+
+        const fiber = yield* Effect.fork(prompt)
+        yield* MockTerminal.inputKey("enter")
+        const result = yield* Fiber.join(fiber)
+
+        expect(result).toBe('')
+      }).pipe(runEffect))
+
+    it("should use the default value when the default is provided", () =>
+      Effect.gen(function*() {
+        const prompt = Prompt.text({
+          message: "This should have a default",
+          default: "default-value"
+        })
+
+        const fiber = yield* Effect.fork(prompt)
+        yield* MockTerminal.inputKey("enter")
+        const result = yield* Fiber.join(fiber)
+
+        expect(result).toBe('default-value')
+      }).pipe(runEffect))
+  })
+})