You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: search_test.go
    path of file: ./repos/lazygit/pkg/utils
    
    the code of the file until where you have to start completion: package utils

import (
	"fmt"
	"testing"

	"gith
    
func TestCaseInsensitiveContains(t *testing.T) {
	testCases := []struct {
		haystack string
		needle   string
		expected bool
	}{
		{"Hello, World!", "world", true},           // Case-insensitive match
		{"Hello, World!", "WORLD", true},           // Case-insensitive match
		{"Hello, World!", "orl", true},             // Case-insensitive match
		{"Hello, World!", "o, W", true},            // Case-insensitive match
		{"Hello, World!", "hello", true},           // Case-insensitive match
		{"Hello, World!", "Foo", false},            // No match
		{"Hello, World!", "Hello, World!!", false}, // No match
		{"Hello, World!", "", true},                // Empty needle matches
		{"", "Hello", false},                       // Empty haystack doesn't match
		{"", "", true},                             // Empty strings match
		{"", " ", false},                           // Empty haystack, non-empty needle
		{" ", "", true},                            // Non-empty haystack, empty needle
	}

	for i, testCase := range testCases {
		result := CaseInsensitiveContains(testCase.haystack, testCase.needle)
		assert.Equal(t, testCase.expected, result, fmt.Sprintf("Test case %d failed. Expected '%v', got '%v' for '%s' in '%s'", i, testCase.expected, result, testCase.needle, testCase.haystack))
	}
}