Implement (most of) text_area test

tests/apple2.text.c

@@ -0,0 +1,48 @@
+#include <criterion/criterion.h>
+
+#include "apple2.text.h"
+#include "objstore.h"
+
+/*
+ * We're replicating the setup and teardown code from vm_bitfont.c so we
+ * can test out the area draw
+ */
+static vm_bitfont *font;
+
+static void
+setup()
+{
+    vm_screen *screen;
+
+    objstore_init();
+
+    screen = vm_screen_create();
+    font = vm_bitfont_create(screen, 
+                             objstore_apple2_sysfont(), 
+                             APPLE2_SYSFONT_SIZE,
+                             7, 8, 0x7F);
+}
+
+static void
+teardown()
+{
+    vm_bitfont_free(font);
+}
+
+TestSuite(apple2_text, .init = setup, .fini = teardown);
+
+// Not a ton we can do for this--it's more or less a visual thing
+/* Test(apple2_text, draw) */
+
+Test(apple2_text, area)
+{
+    vm_area area;
+
+    cr_assert_neq(apple2_text_area(&area, font, 0x0301), OK);
+    cr_assert_neq(apple2_text_area(&area, font, 0x0461), OK);
+    cr_assert_eq(apple2_text_area(&area, font, 0x0537), OK);
+
+    // FIXME: need a proper test for area; we're missing one because the
+    // yoff value I'm getting back is really out of whack, and I want to
+    // do some more use-testing first
+}