Add end-to-end tests for string functions: bit_length, longest_common_prefix, replace_first

Author: allenshen13

presto-native-execution/src/test/java/com/facebook/presto/nativeworker/AbstractTestNativeGeneralQueries.java

@@ -989,6 +989,24 @@ public void testStringFunctions()
         finally {
             dropTableIfExists(tmpTableName);
         }
+
+        // bit_length
+        assertQuery("SELECT bit_length(name) FROM nation");
+        assertQuery("SELECT bit_length(comment) FROM orders");
+        assertQuery("SELECT bit_length('') FROM nation LIMIT 1", "SELECT 0");
+        assertQuery("SELECT bit_length('hello') FROM nation LIMIT 1", "SELECT 40");
+
+        // longest_common_prefix
+        assertQuery("SELECT longest_common_prefix(name, 'UNITED') FROM nation WHERE name LIKE 'UNITED%'");
+        assertQuery("SELECT longest_common_prefix(comment, comment) FROM orders");
+        assertQuery("SELECT longest_common_prefix('', '') FROM nation LIMIT 1", "SELECT ''");
+        assertQuery("SELECT longest_common_prefix('hello', 'hello world') FROM nation LIMIT 1", "SELECT 'hello'");
+
+        // replace_first
+        assertQuery("SELECT replace_first(comment, 'the', 'THE') FROM orders");
+        assertQuery("SELECT replace_first(name, 'A', 'X') FROM nation");
+        assertQuery("SELECT replace_first('aaa', 'a', 'b') FROM nation LIMIT 1", "SELECT 'baa'");
+        assertQuery("SELECT replace_first(comment, ' ', '') FROM orders");
     }
 
     @Test