X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=test%2Ffile_group_test.cc;h=1d42741b65745783d47e67a7963b349b3a48e994;hb=9104df71728a5ca18e79ec242f3e6ed087238dab;hp=e0f83f6315ad877248f6311dd617e46d6956139e;hpb=3828baf56467224f5d44049bf1e7a7ed11f43a05;p=dcpomatic.git

diff --git a/test/file_group_test.cc b/test/file_group_test.cc
index e0f83f631..1d42741b6 100644
--- a/test/file_group_test.cc
+++ b/test/file_group_test.cc
@@ -19,7 +19,8 @@
 */
 
 /** @file  test/file_group_test.cc
- *  @brief Check that FileGroup works.
+ *  @brief Test FileGroup class.
+ *  @ingroup selfcontained
  */
 
 #include <stdint.h>
@@ -87,12 +88,24 @@ BOOST_AUTO_TEST_CASE (file_group_test)
 	BOOST_CHECK_EQUAL (memcmp (data + pos, test, 128), 0);
 	pos += 128;
 
-	/* Read overlapping B/C/D and over-reading */
+	/* Read overlapping B/C/D and over-reading by a lot */
 	BOOST_CHECK_EQUAL (fg.read (test, total_length * 3), total_length - pos);
 	BOOST_CHECK_EQUAL (memcmp (data + pos, test, total_length - pos), 0);
 
-	/* Bad seek */
-	BOOST_CHECK_EQUAL (fg.seek (total_length * 2, SEEK_SET), -1);
+	/* Over-read by a little */
+	BOOST_CHECK_EQUAL (fg.seek (0, SEEK_SET), 0);
+	BOOST_CHECK_EQUAL (fg.read (test, total_length), total_length);
+	BOOST_CHECK_EQUAL (fg.read (test, 1), 0);
+
+	/* Seeking off the end of the file should not give an error */
+	BOOST_CHECK_EQUAL (fg.seek (total_length * 2, SEEK_SET), total_length * 2);
+	/* and attempting to read should return nothing */
+	BOOST_CHECK_EQUAL (fg.read (test, 64), 0);
+	/* but the requested seek should be remembered, so if we now go back (relatively) */
+	BOOST_CHECK_EQUAL (fg.seek (-total_length * 2, SEEK_CUR), 0);
+	/* we should be at the start again */
+	BOOST_CHECK_EQUAL (fg.read (test, 64), 64);
+	BOOST_CHECK_EQUAL (memcmp (data, test, 64), 0);
 
 	/* SEEK_SET */
 	BOOST_CHECK_EQUAL (fg.seek (999, SEEK_SET), 999);