fix: enable env vars in setup steps (and deprecate admin subcommand) (#3871)

* fix: enable env vars in setup steps (and deprecate admin subcommand)

* fix tests and error text

cmd/initialise/verify_database_test.go

@@ -0,0 +1,70 @@
+package initialise
+
+import (
+	"database/sql"
+	"errors"
+	"testing"
+)
+
+func Test_verifyDB(t *testing.T) {
+	type args struct {
+		db       db
+		database string
+	}
+	tests := []struct {
+		name      string
+		args      args
+		targetErr error
+	}{
+		{
+			name: "exists fails",
+			args: args{
+				db:       prepareDB(t, expectQueryErr("SELECT EXISTS(SELECT database_name FROM [show databases] WHERE database_name = $1)", sql.ErrConnDone, "zitadel")),
+				database: "zitadel",
+			},
+			targetErr: sql.ErrConnDone,
+		},
+		{
+			name: "doesn't exists, create fails",
+			args: args{
+				db: prepareDB(t,
+					expectExists("SELECT EXISTS(SELECT database_name FROM [show databases] WHERE database_name = $1)", false, "zitadel"),
+					expectExec("CREATE DATABASE zitadel", sql.ErrTxDone),
+				),
+				database: "zitadel",
+			},
+			targetErr: sql.ErrTxDone,
+		},
+		{
+			name: "doesn't exists, create successful",
+			args: args{
+				db: prepareDB(t,
+					expectExists("SELECT EXISTS(SELECT database_name FROM [show databases] WHERE database_name = $1)", false, "zitadel"),
+					expectExec("CREATE DATABASE zitadel", nil),
+				),
+				database: "zitadel",
+			},
+			targetErr: nil,
+		},
+		{
+			name: "already exists",
+			args: args{
+				db: prepareDB(t,
+					expectExists("SELECT EXISTS(SELECT database_name FROM [show databases] WHERE database_name = $1)", true, "zitadel"),
+				),
+				database: "zitadel",
+			},
+			targetErr: nil,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := VerifyDatabase(tt.args.database)(tt.args.db.db); !errors.Is(err, tt.targetErr) {
+				t.Errorf("verifyDB() error = %v, want: %v", err, tt.targetErr)
+			}
+			if err := tt.args.db.mock.ExpectationsWereMet(); err != nil {
+				t.Error(err)
+			}
+		})
+	}
+}