Add test case for quoteAtoms().

test/com/fsck/k9/helper/Utility_quoteAtoms.java

@@ -0,0 +1,62 @@
+package com.fsck.k9.helper;
+
+import junit.framework.TestCase;
+
+public class Utility_quoteAtoms extends TestCase
+{
+    public void testNoQuote() {
+        // Alpha
+        noQuote("a");
+        noQuote("aa");
+        noQuote("aaa aaa");
+
+        // Numeric
+        noQuote("1");
+        noQuote("12");
+        noQuote("123 456");
+
+        // Alpha Numeric
+        noQuote("abc 123");
+
+        // Specials
+        noQuote("!");
+        noQuote("#");
+        noQuote("$");
+        noQuote("%");
+        noQuote("&");
+        noQuote("'");
+        noQuote("*");
+        noQuote("+");
+        noQuote("-");
+        noQuote("/");
+        noQuote("=");
+        noQuote("?");
+        noQuote("^");
+        noQuote("_");
+        noQuote("`");
+        noQuote("{");
+        noQuote("|");
+        noQuote("}");
+        noQuote("~");
+
+        // Combos
+        noQuote("bob barker! #1!");
+        noQuote("!");
+        noQuote("#&#!");
+        noQuote("{|}");
+        noQuote("'-=+=-'");
+    }
+
+    public void testQuote() {
+        assertEquals("\"bob s. barker\"", quote("bob s. barker"));
+        assertEquals("\":(\"", quote(":("));
+    }
+
+    private void noQuote(final String s) {
+        assertEquals(s, Utility.quoteAtoms(s));
+    }
+
+    private String quote(final String s) {
+        return Utility.quoteAtoms(s);
+    }
+}