moves ping context test to go18 tests and update travis

.travis.yml

@@ -1,11 +1,12 @@
 language: go
 go:
-  - 1.3
+  - 1.3.x
   - 1.4
-  - 1.5
-  - 1.6
-  - 1.7
-  - 1.8
+  - 1.5.x
+  - 1.6.x
+  - 1.7.x
+  - 1.8.x
+  - 1.9.x
 
 services: mysql
 
@@ -14,4 +15,6 @@ install:
 
 script:
   - make db
+  - go vet
+  - test -z "$(go fmt ./...)" # fail if not formatted properly
   - go test -race

db_go18_test.go

@@ -50,3 +50,15 @@ func TestShouldGetMultiRowSet(t *testing.T) {
 		t.Fatal("unexpected number of users")
 	}
 }
+
+func TestShouldBeAbleToPingWithContext(t *testing.T) {
+	db, err := sql.Open("txdb", "ping")
+	if err != nil {
+		t.Fatalf("failed to open a mysql connection, have you run 'make test'? err: %s", err)
+	}
+	defer db.Close()
+
+	if err := db.PingContext(context.Background()); err != nil {
+		t.Fatal(err)
+	}
+}

db_test.go

@@ -1,7 +1,6 @@
 package txdb
 
 import (
-	"context"
 	"database/sql"
 	"fmt"
 	"runtime"
@@ -170,15 +169,3 @@ func TestShouldBeAbleToLockTables(t *testing.T) {
 		t.Fatalf("should be able to unlock table, but got err: %v", err)
 	}
 }
-
-func TestShouldBeAbleToPingWithContext(t *testing.T) {
-	db, err := sql.Open("txdb", "ping")
-	if err != nil {
-		t.Fatalf("failed to open a mysql connection, have you run 'make test'? err: %s", err)
-	}
-	defer db.Close()
-
-	if err := db.PingContext(context.Background()); err != nil {
-		t.Fatal(err)
-	}
-}