tests: add basic remote bake context test

Signed-off-by: Justin Chadwell <me@jedevc.com>

tests/bake.go

@@ -0,0 +1,53 @@
+package tests
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/containerd/continuity/fs/fstest"
+	"github.com/docker/buildx/util/gitutil"
+	"github.com/moby/buildkit/util/testutil/integration"
+	"github.com/stretchr/testify/require"
+)
+
+func bakeCmd(sb integration.Sandbox, dir string, args ...string) (string, error) {
+	args = append([]string{"bake", "--progress=quiet"}, args...)
+	cmd := buildxCmd(sb, args...)
+	cmd.Dir = dir
+	out, err := cmd.CombinedOutput()
+	return string(out), err
+}
+
+var bakeTests = []func(t *testing.T, sb integration.Sandbox){
+	testBakeRemote,
+}
+
+func testBakeRemote(t *testing.T, sb integration.Sandbox) {
+	bakefile := []byte(`
+target "default" {
+	dockerfile-inline = <<EOT
+FROM scratch
+COPY foo /foo
+EOT
+}
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
+		fstest.CreateFile("foo", []byte("foo"), 0600),
+	)
+	dirDest := t.TempDir()
+
+	git, err := gitutil.New(gitutil.WithWorkingDir(dir))
+	require.NoError(t, err)
+
+	gitutil.GitInit(git, t)
+	gitutil.GitAdd(git, t, "docker-bake.hcl", "foo")
+	gitutil.GitCommit(git, t, "initial commit")
+	addr := gitutil.GitServeHTTP(git, t)
+
+	out, err := bakeCmd(sb, dir, addr, "--set", "*.output=type=local,dest="+dirDest)
+	require.NoError(t, err, out)
+
+	require.FileExists(t, filepath.Join(dirDest, "foo"))
+}