Add String16#contains and strstr16 methods.

These are needed for aapt to find javadoc comments that contain
"@removed" in order to skip them when printing styleable docs.

Bug: 28663748
Change-Id: I8866d2167c41e11d6c2586da369560d5815fd13e

1 files changed, 35 insertions, 0 deletions

diff --git a/libutils/tests/Unicode_test.cpp b/libutils/tests/Unicode_test.cpp
index 18c130c55..c263f75e2 100644
--- a/libutils/tests/Unicode_test.cpp
+++ b/libutils/tests/Unicode_test.cpp
@@ -29,6 +29,8 @@ protected:
 
     virtual void TearDown() {
     }
+
+    char16_t const * const kSearchString = u"I am a leaf on the wind.";
 };
 
 TEST_F(UnicodeTest, UTF8toUTF16ZeroLength) {
@@ -112,4 +114,37 @@ TEST_F(UnicodeTest, UTF8toUTF16Normal) {
             << "should be NULL terminated";
 }
 
+TEST_F(UnicodeTest, strstr16EmptyTarget) {
+    EXPECT_EQ(strstr16(kSearchString, u""), kSearchString)
+            << "should return the original pointer";
+}
+
+TEST_F(UnicodeTest, strstr16SameString) {
+    const char16_t* result = strstr16(kSearchString, kSearchString);
+    EXPECT_EQ(kSearchString, result)
+            << "should return the original pointer";
+}
+
+TEST_F(UnicodeTest, strstr16TargetStartOfString) {
+    const char16_t* result = strstr16(kSearchString, u"I am");
+    EXPECT_EQ(kSearchString, result)
+            << "should return the original pointer";
+}
+
+
+TEST_F(UnicodeTest, strstr16TargetEndOfString) {
+    const char16_t* result = strstr16(kSearchString, u"wind.");
+    EXPECT_EQ(kSearchString+19, result);
+}
+
+TEST_F(UnicodeTest, strstr16TargetWithinString) {
+    const char16_t* result = strstr16(kSearchString, u"leaf");
+    EXPECT_EQ(kSearchString+7, result);
+}
+
+TEST_F(UnicodeTest, strstr16TargetNotPresent) {
+    const char16_t* result = strstr16(kSearchString, u"soar");
+    EXPECT_EQ(nullptr, result);
+}
+
 }