初始化

API/internal/service/admin_data_username_test.go

@@ -0,0 +1,77 @@
+package service
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestRandomUsernameLengthAndCharacters(t *testing.T) {
+	for range 200 {
+		username, err := randomUsername()
+		if err != nil {
+			t.Fatalf("randomUsername returned error: %v", err)
+		}
+		if len(username) < 5 || len(username) > 12 {
+			t.Fatalf("username length must be 5 to 12, got %q", username)
+		}
+		for _, character := range username {
+			if !strings.ContainsRune(usernameAlphabet, character) {
+				t.Fatalf("username contains unsupported character: %q", username)
+			}
+		}
+	}
+}
+
+func TestBuildBatchAccounts(t *testing.T) {
+	accounts, err := buildBatchAccounts("RR", "001", "003")
+	if err != nil {
+		t.Fatalf("buildBatchAccounts returned error: %v", err)
+	}
+	want := []string{"RR-001", "RR-002", "RR-003"}
+	if !reflect.DeepEqual(accounts, want) {
+		t.Fatalf("accounts = %#v, want %#v", accounts, want)
+	}
+}
+
+func TestBuildBatchAccountsUsesWidestSequence(t *testing.T) {
+	accounts, err := buildBatchAccounts("A", "1", "003")
+	if err != nil {
+		t.Fatalf("buildBatchAccounts returned error: %v", err)
+	}
+	want := []string{"A-001", "A-002", "A-003"}
+	if !reflect.DeepEqual(accounts, want) {
+		t.Fatalf("accounts = %#v, want %#v", accounts, want)
+	}
+}
+
+func TestBuildBatchAccountsAllowsFiftyUsers(t *testing.T) {
+	accounts, err := buildBatchAccounts("RR", "001", "050")
+	if err != nil {
+		t.Fatalf("buildBatchAccounts returned error: %v", err)
+	}
+	if len(accounts) != 50 || accounts[0] != "RR-001" || accounts[49] != "RR-050" {
+		t.Fatalf("unexpected account range: first=%q last=%q count=%d", accounts[0], accounts[len(accounts)-1], len(accounts))
+	}
+}
+
+func TestBuildBatchAccountsValidation(t *testing.T) {
+	tests := []struct {
+		name   string
+		prefix string
+		start  string
+		end    string
+	}{
+		{name: "empty prefix", start: "001", end: "002"},
+		{name: "non numeric start", prefix: "RR", start: "A01", end: "002"},
+		{name: "start after end", prefix: "RR", start: "003", end: "002"},
+		{name: "more than fifty", prefix: "RR", start: "001", end: "051"},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			if _, err := buildBatchAccounts(test.prefix, test.start, test.end); err == nil {
+				t.Fatal("expected validation error")
+			}
+		})
+	}
+}