Add tests for transport

src/transport/CMakeLists.txt

@@ -8,3 +8,5 @@ endif()
 
 add_library(transport ${src})
 target_include_directories(transport PUBLIC "inc" PRIVATE "privinc")
+enable_testing()
+add_subdirectory(test)

src/transport/test/CMakeLists.txt

@@ -0,0 +1,3 @@
+add_executable(test "test.c")
+target_link_libraries(test PRIVATE transport)
+add_test(NAME test COMMAND test)

src/transport/test/test.c

@@ -0,0 +1,216 @@
+#include <transport.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct client
+{
+    bool connected, received;
+    const char *expected;
+    struct transport_handle h;
+
+    struct io
+    {
+        FILE *in, *out;
+    } io;
+};
+
+struct server
+{
+    struct transport_handle h;
+    struct io io;
+    const char *expected;
+    bool received;
+};
+
+static int io_write(const void *const buf, const size_t n,
+    const struct io *const io)
+{
+    FILE *const f = io->out;
+    const size_t w = fwrite(buf, 1, n, f);
+
+    return ferror(f) ? -1 : w;
+}
+
+static int io_read(void *const buf, const size_t n,
+    const struct io *const io)
+{
+    FILE *const f = io->in;
+    const size_t w = fread(buf, 1, n, f);
+
+    return ferror(f) ? -1 : w;
+}
+
+static int client_write(const void *const buf, const size_t n, void *const arg)
+{
+    struct client *const c = arg;
+
+    return io_write(buf, n, &c->io);
+}
+
+static int client_read(void *const buf, const size_t n, void *const arg)
+{
+    struct client *const c = arg;
+
+    return io_read(buf, n, &c->io);
+}
+
+static void client_received(const struct transport_event *const ev,
+    void *const arg)
+{
+    struct client *const c = arg;
+
+    if (ev->common.type == TRANSPORT_EVENT_TYPE_CONNECT)
+        c->connected = true;
+    else if (ev->common.type == TRANSPORT_EVENT_TYPE_DATA)
+    {
+        const struct transport_event_data *const d = &ev->u.data;
+
+        if (!strncmp(d->buf, c->expected, d->n))
+            c->received = true;
+    }
+}
+
+static int server_write(const void *const buf, const size_t n, void *const arg)
+{
+    struct server *const s = arg;
+
+    return io_write(buf, n, &s->io);
+}
+
+static int server_read(void *const buf, const size_t n, void *const arg)
+{
+    struct server *const s = arg;
+
+    return io_read(buf, n, &s->io);
+}
+
+static void server_received(const struct transport_event *const ev,
+    void *const arg)
+{
+    struct server *const s = arg;
+
+    if (ev->common.type == TRANSPORT_EVENT_TYPE_DATA)
+    {
+        const struct transport_event_data *const d = &ev->u.data;
+
+        if (!strncmp(d->buf, s->expected, d->n))
+            s->received = true;
+    }
+}
+
+static int loop(struct server *const s, struct client *const c)
+{
+    if (transport_update(&s->h))
+        return -1;
+
+    if (!freopen("client", "w+b", s->io.in))
+        return -1;
+
+    rewind(s->io.out);
+
+    if (transport_update(&c->h))
+        return -1;
+
+    if (!freopen("server", "w+b", c->io.in))
+        return -1;
+
+    rewind(c->io.out);
+
+    return 0;
+}
+
+int main(void)
+{
+    int ret = EXIT_FAILURE;
+    FILE *const cf = fopen("client", "w+b"), *sf = fopen("server", "w+b");
+
+    if (!cf)
+    {
+        perror("fopen(3) client");
+        goto end;
+    }
+    else if (!sf)
+    {
+        perror("fopen(3) server");
+        goto end;
+    }
+
+    struct client c =
+    {
+        .h =
+        {
+            .cfg =
+            {
+                .arg = &c,
+                .read = client_read,
+                .write = client_write,
+                .received = client_received
+            }
+        },
+
+        .io =
+        {
+            .in = sf,
+            .out = cf
+        },
+
+        .expected = "hi there!"
+    };
+
+    struct server s =
+    {
+        .h =
+        {
+            .cfg =
+            {
+                .arg = &s,
+                .read = server_read,
+                .write = server_write,
+                .received = server_received,
+            }
+        },
+
+        .io =
+        {
+            .in = cf,
+            .out = sf
+        },
+
+        .expected = "hello"
+    };
+
+    if (transport_connect(&c.h))
+        goto end;
+
+    while (!c.connected)
+        if (loop(&s, &c))
+            goto end;
+
+    if (transport_send(&c.h, s.expected, strlen(s.expected)))
+        goto end;
+
+    while (!s.received)
+        if (loop(&s, &c))
+            goto end;
+
+    if (transport_send(&s.h, c.expected, strlen(c.expected)))
+        goto end;
+
+    while (!c.received)
+        if (loop(&s, &c))
+            goto end;
+
+    ret = EXIT_SUCCESS;
+
+end:
+    if (cf)
+        fclose(cf);
+
+    if (sf)
+        fclose(sf);
+
+    return ret;
+}