integration/build: add TestBuildHugeFile

Add a test case for creating a 8GB file inside a container.
Due to a bug in tar-split this was failing in Docker 18.06.

The file being created is sparse, so there's not much I/O
happening or disk space being used -- meaning the test is
fast and does not require a lot of disk space.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

integration/build/build_test.go

@@ -423,6 +423,38 @@ RUN [ ! -f foo ]
 	assert.Check(t, is.Contains(out.String(), "Successfully built"))
 }
 
+// #37581
+func TestBuildWithHugeFile(t *testing.T) {
+	ctx := context.TODO()
+	defer setupTest(t)()
+
+	dockerfile := `FROM busybox
+# create a sparse file with size over 8GB
+RUN for g in $(seq 0 8); do dd if=/dev/urandom of=rnd bs=1K count=1 seek=$((1024*1024*g)) status=none; done && \
+    ls -la rnd && du -sk rnd`
+
+	buf := bytes.NewBuffer(nil)
+	w := tar.NewWriter(buf)
+	writeTarRecord(t, w, "Dockerfile", dockerfile)
+	err := w.Close()
+	assert.NilError(t, err)
+
+	apiclient := testEnv.APIClient()
+	resp, err := apiclient.ImageBuild(ctx,
+		buf,
+		types.ImageBuildOptions{
+			Remove:      true,
+			ForceRemove: true,
+		})
+
+	out := bytes.NewBuffer(nil)
+	assert.NilError(t, err)
+	_, err = io.Copy(out, resp.Body)
+	resp.Body.Close()
+	assert.NilError(t, err)
+	assert.Check(t, is.Contains(out.String(), "Successfully built"))
+}
+
 func writeTarRecord(t *testing.T, w *tar.Writer, fn, contents string) {
 	err := w.WriteHeader(&tar.Header{
 		Name:     fn,