test: remove obsolete shadowed instruction tests

Merge #6922

PiperOrigin-RevId: 974061113

Author: kikifrost

tests/unittests/models/test_llm_request.py

@@ -187,107 +187,6 @@ def test_append_instructions_with_string_list_multiple_calls():
   assert request.config.system_instruction == expected
 
 
-def test_append_instructions_with_content():
-  """Test that append_instructions works with types.Content (new behavior)."""
-  request = LlmRequest()
-
-  # Create a Content object
-  content = types.Content(
-      role='user', parts=[types.Part(text='This is content-based instruction')]
-  )
-
-  # Append content
-  request.append_instructions(content)
-
-  # Should be set as system_instruction
-  assert len(request.contents) == 0
-  assert request.config.system_instruction == content
-
-
-def test_append_instructions_with_content_multiple_calls():
-  """Test multiple calls to append_instructions with Content objects."""
-  request = LlmRequest()
-
-  # Add some existing content first
-  existing_content = types.Content(
-      role='user', parts=[types.Part(text='Existing content')]
-  )
-  request.contents.append(existing_content)
-
-  # First Content instruction
-  content1 = types.Content(
-      role='user', parts=[types.Part(text='First instruction')]
-  )
-  request.append_instructions(content1)
-
-  # Should be set as system_instruction, existing content unchanged
-  assert len(request.contents) == 1
-  assert request.contents[0] == existing_content
-  assert request.config.system_instruction == content1
-
-  # Second Content instruction
-  content2 = types.Content(
-      role='user', parts=[types.Part(text='Second instruction')]
-  )
-  request.append_instructions(content2)
-
-  # Second Content should be merged with first in system_instruction
-  assert len(request.contents) == 1
-  assert request.contents[0] == existing_content
-  assert isinstance(request.config.system_instruction, types.Content)
-  assert len(request.config.system_instruction.parts) == 2
-  assert request.config.system_instruction.parts[0].text == 'First instruction'
-  assert request.config.system_instruction.parts[1].text == 'Second instruction'
-
-
-def test_append_instructions_with_content_multipart():
-  """Test append_instructions with Content containing multiple parts."""
-  request = LlmRequest()
-
-  # Create Content with multiple parts (text and potentially files)
-  content = types.Content(
-      role='user',
-      parts=[
-          types.Part(text='Text instruction'),
-          types.Part(text='Additional text part'),
-      ],
-  )
-
-  request.append_instructions(content)
-
-  assert len(request.contents) == 0
-  assert request.config.system_instruction == content
-  assert len(request.config.system_instruction.parts) == 2
-  assert request.config.system_instruction.parts[0].text == 'Text instruction'
-  assert (
-      request.config.system_instruction.parts[1].text == 'Additional text part'
-  )
-
-
-def test_append_instructions_mixed_string_and_content():
-  """Test mixing string list and Content instructions."""
-  request = LlmRequest()
-
-  # First add string instructions
-  request.append_instructions(['String instruction'])
-  assert request.config.system_instruction == 'String instruction'
-
-  # Then add Content instruction
-  content = types.Content(
-      role='user', parts=[types.Part(text='Content instruction')]
-  )
-  request.append_instructions(content)
-
-  # String and Content should be merged in system_instruction
-  assert len(request.contents) == 0
-  assert isinstance(request.config.system_instruction, types.Content)
-  assert len(request.config.system_instruction.parts) == 2
-  assert request.config.system_instruction.parts[0].text == 'String instruction'
-  assert (
-      request.config.system_instruction.parts[1].text == 'Content instruction'
-  )
-
-
 def test_append_instructions_empty_string_list():
   """Test append_instructions with empty list of strings."""
   request = LlmRequest()