Mikemacd patch 1 (#2)

* Update sqlmock.go

Permit prepares to obey MatchExpectationsInOrder flag, allowing prepared statements to be prepared in a different order than they were added to the expectations.

* Update sqlmock_test.go

Add test case for unordered prepared statements.

sqlmock.go

@@ -309,6 +309,9 @@ func (c *sqlmock) prepare(query string) (*ExpectedPrepare, error) {
 	var expected *ExpectedPrepare
 	var fulfilled int
 	var ok bool
+	
+	query = stripQuery(query)
+	
 	for _, next := range c.expected {
 		next.Lock()
 		if next.fulfilled() {
@@ -317,17 +320,24 @@ func (c *sqlmock) prepare(query string) (*ExpectedPrepare, error) {
 			continue
 		}
 
-		if expected, ok = next.(*ExpectedPrepare); ok {
-			break
-		}
-
-		next.Unlock()
 		if c.ordered {
+			if expected, ok = next.(*ExpectedPrepare); ok {
+				break
+			}
+
+			next.Unlock()
 			return nil, fmt.Errorf("call to Prepare statement with query '%s', was not expected, next expectation is: %s", query, next)
 		}
+		
+		if pr, ok := next.(*ExpectedPrepare); ok {
+			if pr.sqlRegex.MatchString(query) {
+				expected = pr
+				break
+			}
+		}
+		next.Unlock()
 	}
 
-	query = stripQuery(query)
 	if expected == nil {
 		msg := "call to Prepare '%s' query was not expected"
 		if fulfilled == len(c.expected) {