feat(r/demo/users): pre-register test1 user to make interaction with …

…boards easier (gnolang#2823)

Fixes gnolang#990. 

<details><summary>Contributors' checklist...</summary>

- [ ] Added new tests, or not needed, or not feasible
- [ ] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [ ] Updated the official documentation or not needed
- [ ] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [ ] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

examples/gno.land/r/demo/users/gno.mod

@@ -3,5 +3,6 @@ module gno.land/r/demo/users
 require (
 	gno.land/p/demo/avl v0.0.0-latest
 	gno.land/p/demo/avlhelpers v0.0.0-latest
+	gno.land/p/demo/uassert v0.0.0-latest
 	gno.land/p/demo/users v0.0.0-latest
 )

examples/gno.land/r/demo/users/preregister.gno

@@ -26,6 +26,9 @@ var preRegisteredUsers = []struct {
 	{"nt", "g15ge0ae9077eh40erwrn2eq0xw6wupwqthpv34l"},       // -> @r_nt
 	{"sys", "g1r929wt2qplfawe4lvqv9zuwfdcz4vxdun7qh8l"},      // -> @r_sys
 	{"x", "g164sdpew3c2t3rvxj3kmfv7c7ujlvcw2punzzuz"},        // -> @r_x
+
+	// test1 user
+	{"test1", "g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5"}, // -> @test1
 }
 
 func init() {

examples/gno.land/r/demo/users/users_test.gno

@@ -0,0 +1,13 @@
+package users
+
+import (
+	"testing"
+
+	"gno.land/p/demo/uassert"
+)
+
+func TestPreRegisteredTest1(t *testing.T) {
+	names := ListUsersByPrefix("test1", 1)
+	uassert.Equal(t, len(names), 1)
+	uassert.Equal(t, names[0], "test1")
+}

examples/gno.land/r/demo/users/z_5_filetest.gno

@@ -46,6 +46,7 @@ func main() {
 //  * [nt](/r/demo/users:nt)
 //  * [satoshi](/r/demo/users:satoshi)
 //  * [sys](/r/demo/users:sys)
+//  * [test1](/r/demo/users:test1)
 //  * [x](/r/demo/users:x)
 //
 // ========================================