language/node: log verbose npm pack output

This makes npm pack to log verbose debug output to the console to
simplify debugging npm pack failures.
Refs: https://github.com/Homebrew/brew/pull/2820#discussion_r123890729
Prevously Utils.popen_read swallowed all debug output.

1 files changed, 12 insertions, 2 deletions

diff --git a/Library/Homebrew/test/language/node_spec.rb b/Library/Homebrew/test/language/node_spec.rb
index 55bb1574e..b822c2350 100644
--- a/Library/Homebrew/test/language/node_spec.rb
+++ b/Library/Homebrew/test/language/node_spec.rb
@@ -24,18 +24,28 @@ describe Language::Node do
 
   describe "#std_npm_install_args" do
     npm_install_arg = "libexec"
+    npm_pack_cmd = "npm pack -ddd"
 
     it "raises error with non zero exitstatus" do
+      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("error msg")
+      allow_any_instance_of(Process::Status).to receive(:exitstatus).and_return(42)
+      allow_any_instance_of(nil::NilClass).to receive(:exitstatus).and_return(42)
+      expect { subject.std_npm_install_args(npm_install_arg) }.to \
+        raise_error("npm failed to pack #{Dir.pwd}")
+    end
+
+    it "raises error with empty npm pack output" do
+      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("")
       expect { subject.std_npm_install_args(npm_install_arg) }.to \
         raise_error("npm failed to pack #{Dir.pwd}")
     end
 
     it "does not raise error with a zero exitstatus" do
-      allow(Utils).to receive(:popen_read).with("npm pack").and_return("pack")
+      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("pack.tgz")
       allow_any_instance_of(Process::Status).to receive(:exitstatus).and_return(0)
       allow_any_instance_of(nil::NilClass).to receive(:exitstatus).and_return(0)
       resp = subject.std_npm_install_args(npm_install_arg)
-      expect(resp).to include("--prefix=#{npm_install_arg}", "#{Dir.pwd}/pack")
+      expect(resp).to include("--prefix=#{npm_install_arg}", "#{Dir.pwd}/pack.tgz")
     end
   end