Revert "Remove Go 1.16 specific tests"

This reverts commit db6e9e6.

Author: rubenv

migrate_go116.go

@@ -0,0 +1,23 @@
+//go:build go1.16
+// +build go1.16
+
+package migrate
+
+import (
+	"embed"
+	"net/http"
+)
+
+// A set of migrations loaded from an go1.16 embed.FS
+
+type EmbedFileSystemMigrationSource struct {
+	FileSystem embed.FS
+
+	Root string
+}
+
+var _ MigrationSource = (*EmbedFileSystemMigrationSource)(nil)
+
+func (f EmbedFileSystemMigrationSource) FindMigrations() ([]*Migration, error) {
+	return findMigrations(http.FS(f.FileSystem), f.Root)
+}

migrate_go116_test.go

@@ -0,0 +1,30 @@
+//go:build go1.16
+// +build go1.16
+
+package migrate
+
+import (
+	"embed"
+
+	. "gopkg.in/check.v1"
+)
+
+//go:embed test-migrations/*
+var testEmbedFS embed.FS
+
+func (s *SqliteMigrateSuite) TestEmbedSource(c *C) {
+	migrations := EmbedFileSystemMigrationSource{
+		FileSystem: testEmbedFS,
+		Root:       "test-migrations",
+	}
+
+	// Executes two migrations
+	n, err := Exec(s.Db, "sqlite3", migrations, Up)
+	c.Assert(err, IsNil)
+	c.Assert(n, Equals, 2)
+
+	// Has data
+	id, err := s.DbMap.SelectInt("SELECT id FROM people")
+	c.Assert(err, IsNil)
+	c.Assert(id, Equals, int64(1))
+}