Open source some Android tools' tests.

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PiperOrigin-RevId: 150881315
MOS_MIGRATED_REVID=150881315

1 files changed, 93 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/android/PathsSubject.java b/src/test/java/com/google/devtools/build/android/PathsSubject.java
new file mode 100644
index 0000000000..54ffec371f
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/android/PathsSubject.java
@@ -0,0 +1,93 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// 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.google.devtools.build.android;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.base.Joiner;
+import com.google.common.truth.FailureStrategy;
+import com.google.common.truth.Subject;
+import java.io.IOException;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.List;
+import javax.annotation.Nullable;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+import org.w3c.dom.Document;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * A testing utility that allows assertions against Paths.
+ */
+class PathsSubject extends Subject<PathsSubject, Path> {
+
+  PathsSubject(FailureStrategy failureStrategy, @Nullable Path subject) {
+    super(failureStrategy, subject);
+  }
+
+  void exists() {
+    if (getSubject() == null) {
+      fail("should not be null.");
+    }
+    if (!Files.exists(getSubject())) {
+      fail("exists.");
+    }
+  }
+
+  void xmlContentsIsEqualTo(String... contents) {
+    if (getSubject() == null) {
+      fail("should not be null.");
+    }
+    exists();
+    try {
+      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+      Transformer transformer = TransformerFactory.newInstance().newTransformer();
+      transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
+      transformer.setOutputProperty(OutputKeys.INDENT, "no");
+
+      assertThat(
+              normalizeXml(
+                  newXmlDocument(factory, Files.readAllLines(getSubject(), StandardCharsets.UTF_8)),
+                  transformer))
+          .isEqualTo(normalizeXml(newXmlDocument(factory, Arrays.asList(contents)), transformer));
+    } catch (IOException | SAXException | ParserConfigurationException | TransformerException e) {
+      fail(e.toString());
+    }
+  }
+
+  private Document newXmlDocument(DocumentBuilderFactory factory, List<String> contents)
+      throws SAXException, IOException, ParserConfigurationException {
+    return factory
+        .newDocumentBuilder()
+        .parse(new InputSource(new StringReader(Joiner.on("").join(contents))));
+  }
+
+  private String normalizeXml(Document doc, Transformer transformer) throws TransformerException {
+    StringWriter writer = new StringWriter();
+    transformer.transform(new DOMSource(doc), new StreamResult(writer));
+    return writer.toString().replaceAll("\n|\r", "").replaceAll(">\\s+<", "><");
+  }
+}