Add some tests for C api and code.

ctest/buffer_test.c

@@ -0,0 +1,64 @@
+/*
+* Copyright (c) 2018 Calvin Rose
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to
+* deal in the Software without restriction, including without limitation the
+* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+* sell copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+* IN THE SOFTWARE.
+*/
+
+#include <janet/janet.h>
+#include <assert.h>
+
+int main() {
+    
+    int i;
+    JanetBuffer *buffer1, *buffer2;
+
+    janet_init();
+
+    buffer1 = janet_buffer(100);
+    buffer2 = janet_buffer(0);
+
+    janet_buffer_push_cstring(buffer1, "hello, world!\n");
+
+    janet_buffer_push_u8(buffer2, 'h');
+    janet_buffer_push_u8(buffer2, 'e');
+    janet_buffer_push_u8(buffer2, 'l');
+    janet_buffer_push_u8(buffer2, 'l');
+    janet_buffer_push_u8(buffer2, 'o');
+    janet_buffer_push_u8(buffer2, ',');
+    janet_buffer_push_u8(buffer2, ' ');
+    janet_buffer_push_u8(buffer2, 'w');
+    janet_buffer_push_u8(buffer2, 'o');
+    janet_buffer_push_u8(buffer2, 'r');
+    janet_buffer_push_u8(buffer2, 'l');
+    janet_buffer_push_u8(buffer2, 'd');
+    janet_buffer_push_u8(buffer2, '!');
+    janet_buffer_push_u8(buffer2, '\n');
+
+    assert(buffer1->count == buffer2->count);
+    assert(buffer1->capacity >= buffer1->count);
+    assert(buffer2->capacity >= buffer2->count);
+
+    for (i = 0; i < buffer1->count; i++) {
+        assert(buffer1->data[i] == buffer2->data[i]);
+    }
+
+    janet_deinit();
+
+    return 0;
+}