feat: refactor text-only Gemini prompt (GoogleCloudPlatform#9322)

* feat: refactor text-only Gemini prompt

* fix line length errors

* update testcase

---------

Co-authored-by: Sita Lakshmi Sangameswaran <sitalakshmi@google.com>

vertexai/snippets/src/main/java/vertexai/gemini/TextInput.java

@@ -30,23 +30,16 @@ public static void main(String[] args) throws IOException {
     String projectId = "your-google-cloud-project-id";
     String location = "us-central1";
     String modelName = "gemini-1.0-pro-002";
-    // Does the returned sentiment score match the reviewer's movie rating?
     String textPrompt =
-        "Give a score from 1 - 10 to suggest if the following movie review is"
-            + " negative or positive (1 is most negative, 10 is most positive, 5 will be"
-            + " neutral). Include an explanation.\n"
-            + " The movie takes some time to build, but that is part of its beauty. By the"
-            + " time you are hooked, this tale of friendship and hope is thrilling and"
-            + " affecting, until the very last scene. You will find yourself rooting for"
-            + " the hero every step of the way. This is the sharpest, most original"
-            + " animated film I have seen in years. I would give it 8 out of 10 stars.";
+        "What's a good name for a flower shop that specializes in selling bouquets of"
+            + " dried flowers?";
 
     String output = textInput(projectId, location, modelName, textPrompt);
     System.out.println(output);
   }
 
   // Passes the provided text input to the Gemini model and returns the text-only response.
-  // For the specified textPrompt, the model returns a sentiment score for the given movie review.
+  // For the specified textPrompt, the model returns a list of possible store names.
   public static String textInput(
       String projectId, String location, String modelName, String textPrompt) throws IOException {
     // Initialize client that will be used to send requests. This client only needs

vertexai/snippets/src/test/java/vertexai/gemini/SnippetsIT.java

@@ -199,17 +199,10 @@ public void testStreamingQuestions() throws Exception {
   @Test
   public void testTextInput() throws Exception {
     String textPrompt =
-        "Give a score from 1 - 10 to suggest if the following movie review is"
-            + " negative or positive (1 is most negative, 10 is most positive, 5 will be"
-            + " neutral). Include an explanation.\n"
-            + " The movie takes some time to build, but that is part of its beauty. By the"
-            + " time you are hooked, this tale of friendship and hope is thrilling and"
-            + " affecting, until the very last scene. You will find yourself rooting for"
-            + " the hero every step of the way. This is the sharpest, most original"
-            + " animated film I have seen in years. I would give it 8 out of 10 stars.";
+        "What's a good name for a flower shop that specializes in selling bouquets of"
+            + " dried flowers?";
     String output = TextInput.textInput(PROJECT_ID, LOCATION, GEMINI_PRO, textPrompt);
     assertThat(output).isNotEmpty();
-    assertThat(output).contains("positive");
   }
 
   @Test
@@ -269,7 +262,7 @@ public void testVideoAudioInput() throws IOException {
   public void testAllModalityInputs() throws IOException {
     String output = MultimodalAllInput.multimodalAllInput(PROJECT_ID, LOCATION, GEMINI_PRO_1_5);
 
-    assertThat(output).ignoringCase().contains("00:49");
+    assertThat(output).ignoringCase().contains("0:49");
     assertThat(output).ignoringCase().contains("moment");
   }