[wasm] bootstraptest, basictest: disable backquote literal tests

WASI doesn't support spawning a new process for now.

2 files changed, 13 insertions, 2 deletions

diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index 2cd91ffd07..b155db18aa 100755
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -271,6 +271,14 @@ ensure
   end
 end
 
+def target_platform
+  if @ruby
+    `#{@ruby} --disable-gems -e 'print RUBY_PLATFORM'`
+  else
+    RUBY_PLATFORM
+  end
+end
+
 def show_limit(testsrc, opt = '', **argh)
   result = get_result_string(testsrc, opt, **argh)
   if @tty and @verbose
diff --git a/bootstraptest/test_literal.rb b/bootstraptest/test_literal.rb
index 9b3c10d519..a0d4ee08c6 100644
--- a/bootstraptest/test_literal.rb
+++ b/bootstraptest/test_literal.rb
@@ -65,8 +65,11 @@ assert_equal ':a3c',            ':"a#{1+2}c".inspect'
 assert_equal 'Symbol',          ':"a#{1+2}c".class'
 
 # xstring
-assert_equal "foo\n",           %q(`echo foo`)
-assert_equal "foo\n",           %q(s = "foo"; `echo #{s}`)
+# WASI doesn't support spawning a new process for now.
+if /wasi/ !~ target_platform
+  assert_equal "foo\n",           %q(`echo foo`)
+  assert_equal "foo\n",           %q(s = "foo"; `echo #{s}`)
+end
 
 # regexp
 assert_equal '',                '//.source'