compile.c: support branch coverage for `a&.foo = 1`

[Bug #15476]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66670 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 5 deletions

diff --git a/test/coverage/test_coverage.rb b/test/coverage/test_coverage.rb
index d2a2d018a9..1797c898af 100644
--- a/test/coverage/test_coverage.rb
+++ b/test/coverage/test_coverage.rb
@@ -348,15 +348,22 @@ class TestCoverage < Test::Unit::TestCase
   def test_branch_coverage_for_safe_method_invocation
     result = {
       :branches=>{
-        [:"&.", 0, 3, 0, 3, 6] => {[:then, 1, 3, 0, 3, 6]=>1, [:else, 2, 3, 0, 3, 6]=>0},
-        [:"&.", 3, 4, 0, 4, 6] => {[:then, 4, 4, 0, 4, 6]=>0, [:else, 5, 4, 0, 4, 6]=>1},
+        [:"&.", 0, 6, 0, 6,  6] => {[:then,  1, 6, 0, 6,  6]=>1, [:else,  2, 6, 0, 6,  6]=>0},
+        [:"&.", 3, 7, 0, 7,  6] => {[:then,  4, 7, 0, 7,  6]=>0, [:else,  5, 7, 0, 7,  6]=>1},
+        [:"&.", 6, 8, 0, 8, 10] => {[:then,  7, 8, 0, 8, 10]=>1, [:else,  8, 8, 0, 8, 10]=>0},
+        [:"&.", 9, 9, 0, 9, 10] => {[:then, 10, 9, 0, 9, 10]=>0, [:else, 11, 9, 0, 9, 10]=>1},
       }
     }
     assert_coverage(<<~"end;", { branches: true }, result)
-      a = 10
+      class Dummy; def foo; end; def foo=(x); end; end
+      a = Dummy.new
       b = nil
-      a&.abs
-      b&.hoo
+      c = Dummy.new
+      d = nil
+      a&.foo
+      b&.foo
+      c&.foo = 1
+      d&.foo = 1
     end;
   end