1 files changed, 36 insertions, 0 deletions

diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c
index 8e376efd88a4..98866a770770 100644
--- a/lib/test-string_helpers.c
+++ b/lib/test-string_helpers.c
@@ -326,6 +326,39 @@ out:
         kfree(out_test);
 }
 
+#define string_get_size_maxbuf 16
+#define test_string_get_size_one(size, blk_size, units, exp_result)            \
+        do {                                                                   \
+                BUILD_BUG_ON(sizeof(exp_result) >= string_get_size_maxbuf);    \
+                __test_string_get_size((size), (blk_size), (units),            \
+                                       (exp_result));                          \
+        } while (0)
+
+
+static __init void __test_string_get_size(const u64 size, const u64 blk_size,
+                                          const enum string_size_units units,
+                                          const char *exp_result)
+{
+        char buf[string_get_size_maxbuf];
+
+        string_get_size(size, blk_size, units, buf, sizeof(buf));
+        if (!memcmp(buf, exp_result, strlen(exp_result) + 1))
+                return;
+
+        buf[sizeof(buf) - 1] = '\0';
+        pr_warn("Test 'test_string_get_size_one' failed!\n");
+        pr_warn("string_get_size(size = %llu, blk_size = %llu, units = %d\n",
+                size, blk_size, units);
+        pr_warn("expected: '%s', got '%s'\n", exp_result, buf);
+}
+
+static __init void test_string_get_size(void)
+{
+        test_string_get_size_one(16384, 512, STRING_UNITS_2, "8.00 MiB");
+        test_string_get_size_one(8192, 4096, STRING_UNITS_10, "32.7 MB");
+        test_string_get_size_one(1, 512, STRING_UNITS_10, "512 B");
+}
+
 static int __init test_string_helpers_init(void)
 {
         unsigned int i;
@@ -344,6 +377,9 @@ static int __init test_string_helpers_init(void)
         for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++)
                 test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1);
 
+        /* Test string_get_size() */
+        test_string_get_size();
+
         return -EINVAL;
 }
 module_init(test_string_helpers_init);