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diff --git a/tools/aapt2/text/Utf8Iterator_test.cpp b/tools/aapt2/text/Utf8Iterator_test.cpp
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index 000000000000..8c3e77446595
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+++ b/tools/aapt2/text/Utf8Iterator_test.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#include "text/Utf8Iterator.h"
+
+#include "test/Test.h"
+
+using ::android::StringPiece;
+using ::testing::Eq;
+
+namespace aapt {
+namespace text {
+
+TEST(Utf8IteratorTest, IteratesOverAscii) {
+  Utf8Iterator iter("hello");
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'h'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'e'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'l'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'l'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'o'));
+
+  EXPECT_FALSE(iter.HasNext());
+}
+
+TEST(Utf8IteratorTest, IteratesOverUnicode) {
+  Utf8Iterator iter("Hi there 華勵蓮🍩");
+  iter.Skip(9);
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'華'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'勵'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'蓮'));
+
+  ASSERT_TRUE(iter.HasNext());
+  EXPECT_THAT(iter.Next(), Eq(U'🍩'));
+
+  EXPECT_FALSE(iter.HasNext());
+}
+
+TEST(Utf8IteratorTest, PositionPointsToTheCorrectPlace) {
+  const StringPiece expected("Mm🍩");
+  Utf8Iterator iter(expected);
+
+  // Before any character, the position should be 0.
+  EXPECT_THAT(iter.Position(), Eq(0u));
+
+  // The 'M' character, one byte.
+  ASSERT_TRUE(iter.HasNext());
+  iter.Next();
+  EXPECT_THAT(iter.Position(), Eq(1u));
+
+  // The 'm' character, one byte.
+  ASSERT_TRUE(iter.HasNext());
+  iter.Next();
+  EXPECT_THAT(iter.Position(), Eq(2u));
+
+  // The doughnut character, 4 bytes.
+  ASSERT_TRUE(iter.HasNext());
+  iter.Next();
+  EXPECT_THAT(iter.Position(), Eq(6u));
+
+  // There should be nothing left.
+  EXPECT_FALSE(iter.HasNext());
+  EXPECT_THAT(iter.Position(), Eq(expected.size()));
+}
+
+}  // namespace text
+}  // namespace aapt