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: map_test.go
    path of file: ./repos/caddy/modules/caddyhttp/map
    
    the code of the file until where you have to start completion: package maphandler

import (
	"context"
	"net/http"
	"net/http/httptest"
	"reflect"
	"testing"

	"github.com/caddyserver/caddy/v2"
	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
)

func TestHandler(t *testing.T) {
	for i, tc := range []struct {
		handler Handler
		reqURI  string
		expect  map[string]any
	}{
		{
			reqURI: "/foo",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						Input:   "/foo",
						Outputs: []any{"FOO"},
					},
				},
			},
			expect: map[string]any{
				"outp
    
func TestHandler(t *testing.T) {
	for i, tc := range []struct {
		handler Handler
		reqURI  string
		expect  map[string]any
	}{
		{
			reqURI: "/foo",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						Input:   "/foo",
						Outputs: []any{"FOO"},
					},
				},
			},
			expect: map[string]any{
				"output": "FOO",
			},
		},
		{
			reqURI: "/abcdef",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						InputRegexp: "(/abc)",
						Outputs:     []any{"ABC"},
					},
				},
			},
			expect: map[string]any{
				"output": "ABC",
			},
		},
		{
			reqURI: "/ABCxyzDEF",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						InputRegexp: "(xyz)",
						Outputs:     []any{"...${1}..."},
					},
				},
			},
			expect: map[string]any{
				"output": "...xyz...",
			},
		},
		{
			// Test case from https://caddy.community/t/map-directive-and-regular-expressions/13866/14?u=matt
			reqURI: "/?s=0%27+AND+%28SELECT+0+FROM+%28SELECT+count%28%2A%29%2C+CONCAT%28%28SELECT+%40%40version%29%2C+0x23%2C+FLOOR%28RAND%280%29%2A2%29%29+AS+x+FROM+information_schema.columns+GROUP+BY+x%29+y%29+-+-+%27",
			handler: Handler{
				Source:       "{http.request.uri}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						InputRegexp: "(?i)(\\^|`|<|>|%|\\\\|\\{|\\}|\\|)",
						Outputs:     []any{"3"},
					},
				},
			},
			expect: map[string]any{
				"output": "3",
			},
		},
		{
			reqURI: "/foo",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Mappings: []Mapping{
					{
						Input:   "/foo",
						Outputs: []any{"{testvar}"},
					},
				},
			},
			expect: map[string]any{
				"output": "testing",
			},
		},
		{
			reqURI: "/foo",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Defaults:     []string{"default"},
			},
			expect: map[string]any{
				"output": "default",
			},
		},
		{
			reqURI: "/foo",
			handler: Handler{
				Source:       "{http.request.uri.path}",
				Destinations: []string{"{output}"},
				Defaults:     []string{"{testvar}"},
			},
			expect: map[string]any{
				"output": "testing",
			},
		},
	} {
		if err := tc.handler.Provision(caddy.Context{}); err != nil {
			t.Fatalf("Test %d: Provisioning handler: %v", i, err)
		}

		req, err := http.NewRequest(http.MethodGet, tc.reqURI, nil)
		if err != nil {
			t.Fatalf("Test %d: Creating request: %v", i, err)
		}
		repl := caddyhttp.NewTestReplacer(req)
		repl.Set("testvar", "testing")
		ctx := context.WithValue(req.Context(), caddy.ReplacerCtxKey, repl)
		req = req.WithContext(ctx)

		rr := httptest.NewRecorder()
		noop := caddyhttp.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) error { return nil })

		if err := tc.handler.ServeHTTP(rr, req, noop); err != nil {
			t.Errorf("Test %d: Handler returned error: %v", i, err)
			continue
		}

		for key, expected := range tc.expect {
			actual, _ := repl.Get(key)
			if !reflect.DeepEqual(actual, expected) {
				t.Errorf("Test %d: Expected %#v but got %#v for {%s}", i, expected, actual, key)
			}
		}
	}
}