Add test cases; fix the regex used

java/ql/test/query-tests/security/CWE-524/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.example.test">
+</manifest>

java/ql/test/query-tests/security/CWE-524/SensitiveKeyboardCache.ql

@@ -0,0 +1,19 @@
+import java
+import semmle.code.java.security.SensitiveKeyboardCacheQuery
+import TestUtilities.InlineExpectationsTest
+
+class SensitiveKeyboardCacheTest extends InlineExpectationsTest {
+  SensitiveKeyboardCacheTest() { this = "SensitiveKeyboardCacheTest" }
+
+  override string getARelevantTag() { result = "hasResult" }
+
+  override predicate hasActualResult(Location loc, string element, string tag, string value) {
+    exists(AndroidEditableXmlElement el |
+      el = getASensitiveCachedInput() and
+      loc = el.getLocation() and
+      element = el.toString() and
+      tag = "hasResult" and
+      value = ""
+    )
+  }
+}

java/ql/test/query-tests/security/CWE-524/Test.java

@@ -0,0 +1 @@
+class Test {}

java/ql/test/query-tests/security/CWE-524/res/layout/Test.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+
+   <!-- $hasResult --> <EditText
+        android:id="@+id/test1_password"
+        android:inputType="text"/>  
+
+    <EditText
+        android:id="@+id/test2_safe"
+        android:inputType="text"/> 
+
+    <EditText
+        android:id="@+id/test3_password"
+        android:inputType="textNoSuggestions"/>  
+
+    <EditText
+        android:id="@+id/test4_password"
+        android:inputType="textPassword"/> 
+
+    <!-- $hasResult --> <EditText
+        android:id="@+id/test5_bank_account_name"
+        android:inputType="textMultiLine"/>  
+</LinearLayout>