}
				break
			}
			if want := testOutput[done : done+len(line)]; !bytes.Equal(want, line) {
				t.Errorf("Bad line at stride %d: want: %x got: %x", stride, want, line)
			}
			done += len(line)
		}
		if done != len(testOutput) {
			t.Errorf("ReadLine didn't return everything: got: %d, want: %d (stride: %d)", done, len(testOutput), stride)
		}
	}
}

func TestReadLine(t *testing.T) {

test:win_clang_base --linkopt=/FORCE:MULTIPLE
test:win_clang_base --host_linkopt=/FORCE:MULTIPLE
test:win_clang_base --build_tests_only --keep_going --test_output=errors --verbose_failures=true --test_summary=short

common:win_clang --config=win_clang_base
common:win_clang --config=clang_local
common:win_clang --extra_toolchains=@local_config_cc//:cc-toolchain-x64_windows-clang-cl