From 4db40579baa1d69116e3ce7863951e36d1ddf425 Mon Sep 17 00:00:00 2001
From: Martin Nordholts <martin.nordholts@codetale.se>
Date: Sat, 2 Dec 2023 19:15:55 +0100
Subject: [PATCH] libtest: Add regression tests for padding

As you can see the padding is wrong when running benches as tests. This
will be fixed in the next commit. (Benches should only be padded when
run as benches to make it easy to compare the benchmark numbers.)
---
 tests/run-make/libtest-padding/Makefile     | 14 ++++++++++++++
 tests/run-make/libtest-padding/bench.stdout |  9 +++++++++
 tests/run-make/libtest-padding/test.stdout  |  9 +++++++++
 tests/run-make/libtest-padding/tests.rs     | 18 ++++++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 tests/run-make/libtest-padding/Makefile
 create mode 100644 tests/run-make/libtest-padding/bench.stdout
 create mode 100644 tests/run-make/libtest-padding/test.stdout
 create mode 100644 tests/run-make/libtest-padding/tests.rs

diff --git a/tests/run-make/libtest-padding/Makefile b/tests/run-make/libtest-padding/Makefile
new file mode 100644
index 000000000000..063d0dc0a6c0
--- /dev/null
+++ b/tests/run-make/libtest-padding/Makefile
@@ -0,0 +1,14 @@
+# ignore-cross-compile because we run the compiled code
+# needs-unwind because #[bench] and -Cpanic=abort requires -Zpanic-abort-tests
+include ../tools.mk
+
+NORMALIZE=sed 's%[0-9,]\+ ns/iter (+/- [0-9,]\+)%?? ns/iter (+/- ??)%' | sed 's%finished in [0-9\.]\+%finished in ??%'
+
+all:
+	$(RUSTC) --test tests.rs
+
+	$(call RUN,tests) --test-threads=1 | $(NORMALIZE) > "$(TMPDIR)"/test.stdout
+	$(RUSTC_TEST_OP) "$(TMPDIR)"/test.stdout test.stdout
+
+	$(call RUN,tests) --test-threads=1 --bench | $(NORMALIZE) > "$(TMPDIR)"/bench.stdout
+	$(RUSTC_TEST_OP) "$(TMPDIR)"/bench.stdout bench.stdout
diff --git a/tests/run-make/libtest-padding/bench.stdout b/tests/run-make/libtest-padding/bench.stdout
new file mode 100644
index 000000000000..3d55401c93ae
--- /dev/null
+++ b/tests/run-make/libtest-padding/bench.stdout
@@ -0,0 +1,9 @@
+
+running 4 tests
+test short_test_name ... ignored
+test this_is_a_really_long_test_name ... ignored
+test short_bench_name                 ... bench:           ?? ns/iter (+/- ??)
+test this_is_a_really_long_bench_name ... bench:           ?? ns/iter (+/- ??)
+
+test result: ok. 0 passed; 0 failed; 2 ignored; 2 measured; 0 filtered out; finished in ??s
+
diff --git a/tests/run-make/libtest-padding/test.stdout b/tests/run-make/libtest-padding/test.stdout
new file mode 100644
index 000000000000..c655f0347564
--- /dev/null
+++ b/tests/run-make/libtest-padding/test.stdout
@@ -0,0 +1,9 @@
+
+running 4 tests
+test short_bench_name                 ... ok
+test short_test_name ... ok
+test this_is_a_really_long_bench_name ... ok
+test this_is_a_really_long_test_name ... ok
+
+test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in ??s
+
diff --git a/tests/run-make/libtest-padding/tests.rs b/tests/run-make/libtest-padding/tests.rs
new file mode 100644
index 000000000000..cadf07237e95
--- /dev/null
+++ b/tests/run-make/libtest-padding/tests.rs
@@ -0,0 +1,18 @@
+#![feature(test)]
+extern crate test;
+
+#[test]
+fn short_test_name() {}
+
+#[test]
+fn this_is_a_really_long_test_name() {}
+
+#[bench]
+fn short_bench_name(b: &mut test::Bencher) {
+    b.iter(|| 1);
+}
+
+#[bench]
+fn this_is_a_really_long_bench_name(b: &mut test::Bencher) {
+    b.iter(|| 1);
+}