sample_updater: add non-streaming demo

SampleUpdater app was tested manually on a device.
There are unit tests for utility classes.

SampleUpdater app demonstrates how to use Android Update Engine to
apply A/B (seamless) update.
This CL contains demo of non-stream update using async update_engine,
which is accessed directly from an activity.
This app also shows logs from update_engine on the UI.
Instructions can be found in `README.md`.

- Create a UI with list of configs, current version, control buttons and a progress bar
- Add PayloadSpec and PayloadSpecs for working with update zip file
- Add UpdateConfig for working with json config files
- Add applying non-streaming update

Test: tested manually and unit tests for utilities
Change-Id: I05d4a46ad9cf8b334c9c60c7dd4da486dac0400a
Signed-off-by: Zhomart Mukhamejanov <zhomart@google.com>
diff --git a/sample_updater/tests/src/com/example/android/systemupdatersample/UpdateConfigTest.java b/sample_updater/tests/src/com/example/android/systemupdatersample/UpdateConfigTest.java
new file mode 100644
index 0000000..8715371
--- /dev/null
+++ b/sample_updater/tests/src/com/example/android/systemupdatersample/UpdateConfigTest.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.systemupdatersample;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+
+/**
+ * Tests for {@link UpdateConfig}
+ */
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class UpdateConfigTest {
+
+    private static final String JSON_NON_STREAMING =
+            "{\"name\": \"vip update\", \"url\": \"file:///builds/a.zip\", "
+            + " \"type\": \"NON_STREAMING\"}";
+
+    private static final String JSON_STREAMING =
+            "{\"name\": \"vip update 2\", \"url\": \"http://foo.bar/a.zip\", "
+            + "\"type\": \"STREAMING\"}";
+
+    @Rule
+    public final ExpectedException thrown = ExpectedException.none();
+
+    @Test
+    public void fromJson_parsesJsonConfigWithoutMetadata() throws Exception {
+        UpdateConfig config = UpdateConfig.fromJson(JSON_NON_STREAMING);
+        assertEquals("name is parsed", "vip update", config.getName());
+        assertEquals("stores raw json", JSON_NON_STREAMING, config.getRawJson());
+        assertSame("type is parsed", UpdateConfig.TYPE_NON_STREAMING, config.getInstallType());
+        assertEquals("url is parsed", "file:///builds/a.zip", config.getUrl());
+    }
+
+    @Test
+    public void getUpdatePackageFile_throwsErrorIfStreaming() throws Exception {
+        UpdateConfig config = UpdateConfig.fromJson(JSON_STREAMING);
+        thrown.expect(RuntimeException.class);
+        config.getUpdatePackageFile();
+    }
+
+    @Test
+    public void getUpdatePackageFile_throwsErrorIfNotAFile() throws Exception {
+        String json = "{\"name\": \"upd\", \"url\": \"http://foo.bar\","
+                + " \"type\": \"NON_STREAMING\"}";
+        UpdateConfig config = UpdateConfig.fromJson(json);
+        thrown.expect(RuntimeException.class);
+        config.getUpdatePackageFile();
+    }
+
+    @Test
+    public void getUpdatePackageFile_works() throws Exception {
+        UpdateConfig c = UpdateConfig.fromJson(JSON_NON_STREAMING);
+        assertEquals("correct path", "/builds/a.zip", c.getUpdatePackageFile().getAbsolutePath());
+    }
+
+}