[PATCH v8 6/6] test_bits: add tests for BIT_U*()

[Vincent Mailhol via B4 Relay]

From: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>

Add some additional tests in lib/tests/test_bits.c to cover the
expected results of the fixed type BIT_U*() macros.

Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
Reviewed-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
---
Changelog:

  v7 -> v8:

    - In commit db6fe4d61ece ("lib: Move KUnit tests into tests/
      subdirectory"), lib/test_bits.c was moved to
      lib/tests/test_bits.c. Adjust the patch descrption accordingly.

  v6 -> v7:

    - Add Lucas's Reviewed-by tag.

  v5 -> v6:

    - No changes.

  v4 -> v5:

    - BIT_U8()/BIT_U16() are now back to u8/u16.

  v3 -> v4:

    - New patch.
---
 lib/tests/test_bits.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/tests/test_bits.c b/lib/tests/test_bits.c
index f443476f3265c463c1219b13c1ef9663d238d58b..47325b41515fde2c3ed434ed6f4094925c98886b 100644
--- a/lib/tests/test_bits.c
+++ b/lib/tests/test_bits.c
@@ -9,6 +9,16 @@
 
 #define assert_type(t, x) _Generic(x, t: x, default: 0)
 
+static_assert(assert_type(u8, BIT_U8(0)) == 1u);
+static_assert(assert_type(u16, BIT_U16(0)) == 1u);
+static_assert(assert_type(u32, BIT_U32(0)) == 1u);
+static_assert(assert_type(u64, BIT_U64(0)) == 1ull);
+
+static_assert(assert_type(u8, BIT_U8(7)) == 0x80u);
+static_assert(assert_type(u16, BIT_U16(15)) == 0x8000u);
+static_assert(assert_type(u32, BIT_U32(31)) == 0x80000000u);
+static_assert(assert_type(u64, BIT_U64(63)) == 0x8000000000000000ull);
+
 static_assert(assert_type(unsigned long, GENMASK(31, 0)) == U32_MAX);
 static_assert(assert_type(unsigned long long, GENMASK_ULL(63, 0)) == U64_MAX);
 static_assert(assert_type(u8, GENMASK_U8(7, 0)) == U8_MAX);

-- 
2.48.1