.

bigfile/tests/test_virtmem.c

@@ -1160,7 +1160,7 @@ void test_file_access_mmapbase(void)
     RAM *ram;
     BigFileH fh_struct, *fh = &fh_struct;
     VMA vma_struct, *vma = &vma_struct;
-    size_t PS;
+    size_t PS, PSb;
     int fd, err;
 
     diag("Testing file access (mmap base)");
@@ -1168,6 +1168,7 @@ void test_file_access_mmapbase(void)
     ram = ram_new(NULL, NULL);
     ok1(ram);
     PS = ram->pagesize;
+    PSb = PS / sizeof(blk_t);   /* page size in blk_t units */
 
     /* ensure we are starting from new ram */
     ok1(list_empty(&ram->lru_list));
@@ -1178,6 +1179,7 @@ void test_file_access_mmapbase(void)
     ok1(fd != -1);
     err = unlink(path);
     ok1(!err);
+    // XXX write data
 
     BigFileMMap fileid = {
         .blksize    = ram->pagesize,    /* artificially blksize = pagesize */
@@ -1196,6 +1198,17 @@ void test_file_access_mmapbase(void)
     err = fileh_mmap(vma, fh, 100, 4);
     ok1(!err);
 
+    /* all pages initially unmapped */
+    ok1(!M(vma, 0));    CHECK_NOPAGE(       100                      );
+    ok1(!M(vma, 1));    CHECK_NOPAGE(       101                      );
+    ok1(!M(vma, 2));    CHECK_NOPAGE(       102                      );
+    ok1(!M(vma, 3));    CHECK_NOPAGE(       103                      );
+
+    ok1(list_empty(&ram->lru_list));
+
+    /* read page[0] */
+    ok1(B(vma, 0*PSb) == 100);
+
 }