Initial copy of buildMetadata

tools/java/common/test/com/google/i18n/phonenumbers/MetadataFilterCoverageTest.java

@@ -0,0 +1,93 @@
+/*
+ *  Copyright (C) 2016 The Libphonenumber Authors
+ *
+ *  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.i18n.phonenumbers;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.nio.charset.Charset;
+import junit.framework.TestCase;
+
+/**
+ * Tests to ensure that the {@link MetadataFilter} logic over excludable fields cover all applicable
+ * fields.
+ */
+public final class MetadataFilterCoverageTest extends TestCase {
+  private static final String CODE;
+
+  static {
+    try {
+      BufferedReader source = new BufferedReader(new InputStreamReader(new BufferedInputStream(
+          MetadataFilterTest.class.getResourceAsStream(
+          "/com/google/i18n/phonenumbers/MetadataFilter.java")),
+          Charset.forName("UTF-8")));
+      StringBuilder codeBuilder = new StringBuilder();
+      for (String line = source.readLine(); line != null; line = source.readLine()) {
+        codeBuilder.append(line).append("\n");
+      }
+      CODE = codeBuilder.toString();
+    } catch (IOException e) {
+      throw new RuntimeException("MetadataFilter.java resource not set up properly", e);
+    }
+  }
+
+  public void testCoverageOfExcludableParentFields() {
+    for (String field : MetadataFilter.excludableParentFields) {
+      String capitalized = Character.toUpperCase(field.charAt(0)) + field.substring(1);
+      String conditional = String.format("(?s).*if \\(metadata.has%s\\(\\)\\) \\{\\s+"
+          + "metadata.set%s\\(getFiltered\\(\"%s\",\\s+metadata.get%s\\(\\)\\)\\);\\s+\\}.*",
+          capitalized, capitalized, field, capitalized);
+      assertTrue("Code is missing correct conditional for " + field, CODE.matches(conditional));
+    }
+
+    assertEquals(countOccurrencesOf("metadata.has", CODE),
+        MetadataFilter.excludableParentFields.size());
+  }
+
+  public void testCoverageOfExcludableChildFields() {
+    for (String field : MetadataFilter.excludableChildFields) {
+      String capitalized = Character.toUpperCase(field.charAt(0)) + field.substring(1);
+      String conditional = String.format("(?s).*if \\(shouldDrop\\(type, \"%s\"\\)\\) \\{\\s+"
+          + "builder.clear%s\\(\\);\\s+\\}.*", field, capitalized);
+      assertTrue("Code is missing correct conditional for " + field, CODE.matches(conditional));
+    }
+
+    assertEquals(countOccurrencesOf("shouldDrop(type, \"", CODE),
+        MetadataFilter.excludableChildFields.size());
+  }
+
+  public void testCoverageOfExcludableChildlessFields() {
+    for (String field : MetadataFilter.excludableChildlessFields) {
+      String capitalized = Character.toUpperCase(field.charAt(0)) + field.substring(1);
+      String conditional = String.format("(?s).*if \\(shouldDrop\\(\"%s\"\\)\\) \\{\\s+"
+          + "metadata.clear%s\\(\\);\\s+\\}.*", field, capitalized);
+      assertTrue("Code is missing correct conditional for " + field, CODE.matches(conditional));
+    }
+
+    assertEquals(countOccurrencesOf("shouldDrop(\"", CODE),
+        MetadataFilter.excludableChildlessFields.size());
+  }
+
+  private static int countOccurrencesOf(String substring, String string) {
+    int count = 0;
+    for (int i = string.indexOf(substring); i != -1; i = string.indexOf(substring, i + 1)) {
+      count++;
+    }
+    return count;
+  }
+}