core tests: Convert tests that are effectively unit tests to be one

(standard android junit tests). Provides implementations for
android platform utils needed (in unit test environment):
1. android.util.Log, 2. android.text.TextUtils.isEmpty()

1 files changed, 32 insertions, 0 deletions

diff --git a/core/src/test/java/android/text/TextUtils.java b/core/src/test/java/android/text/TextUtils.java
new file mode 100644
index 000000000..c31234171
--- /dev/null
+++ b/core/src/test/java/android/text/TextUtils.java
@@ -0,0 +1,32 @@
+package android.text;
+
+/**
+ * A slim-down version of standard {@link android.text.TextUtils} to be used in unit tests.
+ */
+public class TextUtils {
+
+    /**
+     * Returns true if a and b are equal, including if they are both null.
+     * <p><i>Note: In platform versions 1.1 and earlier, this method only worked well if
+     * both the arguments were instances of String.</i></p>
+     * @param a first CharSequence to check
+     * @param b second CharSequence to check
+     * @return true if a and b are equal
+     */
+    public static boolean equals(CharSequence a, CharSequence b) {
+        if (a == b) return true;
+        int length;
+        if (a != null && b != null && (length = a.length()) == b.length()) {
+            if (a instanceof String && b instanceof String) {
+                return a.equals(b);
+            } else {
+                for (int i = 0; i < length; i++) {
+                    if (a.charAt(i) != b.charAt(i)) return false;
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+}