X-Git-Url: https://git.sesse.net/?p=fjl;a=blobdiff_plain;f=bytesource_test.c;h=6c692cbf1078447e654ff0bf1341d76327caeb5a;hp=4dc7661c0a3e66cb150e6e95c1c6f935b39027dd;hb=19a58db08afd149a862506936093423db756a2dc;hpb=56ceb8f3300b0ee121bddf572f935f87feedfea8

diff --git a/bytesource_test.c b/bytesource_test.c
index 4dc7661..6c692cb 100644
--- a/bytesource_test.c
+++ b/bytesource_test.c
@@ -148,6 +148,39 @@ void test_broken_marker()
 	assert(ret == -1);
 }
 
+// Testing small reads -- even with a fast source, we shouldn't get more data
+// back than we asked for.
+void test_small_reads()
+{
+	uint8_t bytes[] = { 0xff, 0x80, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };
+
+	struct custom_read_userdata ud;
+	ud.bytes = bytes;
+	ud.bytes_left = sizeof(bytes);
+
+	struct byte_source source;
+	init_byte_source(&source, custom_read, &ud);
+
+	uint8_t buf[4096];
+	ssize_t ret;
+
+	ret = byte_source_input_func(&source, buf, 4096);
+	assert(ret == 0);	
+
+	uint8_t marker = byte_source_read_marker(&source);
+	assert(marker == 0x80);
+
+	for (unsigned i = 0; i < 8; ++i) {
+		ret = byte_source_input_func(&source, buf, 1);
+		assert(ret == 1);
+		assert(buf[0] == i);
+	}
+	
+	// Now EOF.
+	ret = byte_source_input_func(&source, buf, 4096);
+	assert(ret == 0);
+}
+
 int main(void)
 {
 	init_choices();
@@ -161,6 +194,9 @@ int main(void)
 	printf("test_broken_marker()\n");
 	test_broken_marker();
 	
+	printf("test_small_reads()\n");
+	test_small_reads();
+	
 	printf("All tests pass.\n");
 	return 0;
 }