skip test under travis

.travis.yml

@@ -1,10 +1,11 @@
+sudo: false
 language: go
-
 install: go get -t ./...
-
 script: make ci
-
-sudo: false
-
 go:
 - "1.10"
+addons:
+  apt:
+    update: true
+    packages:
+    - sqlite3

ci/expr_test.go

@@ -3,13 +3,17 @@
 package ci
 
 import (
+	"os"
 	"testing"
 
 	"github.com/alicebob/sqlittle"
 )
 
 func TestExprCol(t *testing.T) {
 	// index with expression column
+	if os.Getenv("TRAVIS") != "" {
+		t.Skip("travis has old sqlite3 version")
+	}
 	Compare(
 		t,
 		`

ci/support_test.go

@@ -38,6 +38,8 @@ func Compare(
 	sqlSelect string,
 	little func(*testing.T, *sqlittle.DB) [][]string,
 ) {
+	t.Helper()
+
 	file, close := tmpfile(t)
 	defer close()