lib: Added unit test to iostream-temp.

src/lib/Makefile.am

@@ -311,6 +311,7 @@ test_lib_SOURCES = \
 	test-hex-binary.c \
 	test-ioloop.c \
 	test-iso8601-date.c \
+	test-iostream-temp.c \
 	test-istream.c \
 	test-istream-base64-decoder.c \
 	test-istream-base64-encoder.c \

src/lib/test-iostream-temp.c

@@ -0,0 +1,46 @@
+/* Copyright (c) 2016 Dovecot authors, see the included COPYING file */
+
+#include "test-lib.h"
+#include "ostream.h"
+#include "iostream-temp.h"
+
+static void test_iostream_temp_create_sized_memory(void)
+{
+	struct ostream *output;
+
+	test_begin("iostream_temp_create_sized() memory");
+	output = iostream_temp_create_sized(".intentional-nonexistent-error/", 0, "test", 4);
+	test_assert(o_stream_send(output, "123", 3) == 3);
+	test_assert(o_stream_send(output, "4", 1) == 1);
+	test_assert(o_stream_get_fd(output) == -1);
+
+	/* now we'll try to switch to writing to a file, but it'll fail */
+	test_expect_errors(1);
+	test_assert(o_stream_send(output, "5", 1) == 1);
+	test_expect_no_more_errors();
+
+	test_assert(o_stream_get_fd(output) == -1);
+	o_stream_destroy(&output);
+	test_end();
+}
+
+static void test_iostream_temp_create_sized_disk(void)
+{
+	struct ostream *output;
+
+	test_begin("iostream_temp_create_sized() disk");
+	output = iostream_temp_create_sized(".", 0, "test", 4);
+	test_assert(o_stream_send(output, "123", 3) == 3);
+	test_assert(o_stream_send(output, "4", 1) == 1);
+	test_assert(o_stream_get_fd(output) == -1);
+	test_assert(o_stream_send(output, "5", 1) == 1);
+	test_assert(o_stream_get_fd(output) != -1);
+	o_stream_destroy(&output);
+	test_end();
+}
+
+void test_iostream_temp(void)
+{
+	test_iostream_temp_create_sized_memory();
+	test_iostream_temp_create_sized_disk();
+}

src/lib/test-lib.c

@@ -22,6 +22,7 @@ int main(void)
 		test_hex_binary,
 		test_ioloop,
 		test_iso8601_date,
+		test_iostream_temp,
 		test_istream,
 		test_istream_base64_decoder,
 		test_istream_base64_encoder,

src/lib/test-lib.h

@@ -23,6 +23,7 @@ void test_hash_method(void);
 void test_hex_binary(void);
 void test_ioloop(void);
 void test_iso8601_date(void);
+void test_iostream_temp(void);
 void test_istream(void);
 void test_istream_base64_decoder(void);
 void test_istream_base64_encoder(void);