internal_stanza.rb: Remove obsolete code. Improve detection of missing stanzas

internal_stanza_spec.rb: change do ... end blocks to { } blocks

Library/Homebrew/cask/lib/hbc/cli/internal_stanza.rb

@@ -57,12 +57,6 @@ module Hbc
         casks(alternative: -> { Hbc.all }).each do |cask|
           print "#{cask}\t" if table?
 
-          unless cask.respond_to?(stanza)
-            opoo "no such stanza '#{stanza}' on Cask '#{cask}'" unless quiet?
-            puts ""
-            next
-          end
-
           begin
             value = cask.send(stanza)
           rescue StandardError
@@ -71,7 +65,9 @@ module Hbc
             next
           end
 
-          if (value.nil? || value.is_a?(Array) && value.empty?) ||
+          if value.nil? || (value.respond_to?(:to_a) && value.to_a.empty?) ||
+             (value.respond_to?(:to_h) && value.to_h.empty?) ||
+             (value.respond_to?(:to_s) && value.to_s == "{}") ||
              (artifact_name && !value.key?(artifact_name))
 
             if artifact_name

Library/Homebrew/test/cask/cli/internal_stanza_spec.rb

@@ -1,35 +1,42 @@
 describe Hbc::CLI::InternalStanza, :cask do
   it "shows stanza of the Specified Cask" do
     command = described_class.new("gpg", "with-gpg")
-    expect do
+    expect {
       command.run
-    end.to output("http://example.com/gpg-signature.asc\n").to_stdout
+    }.to output("http://example.com/gpg-signature.asc\n").to_stdout
   end
 
   it "raises an exception when stanza is invalid" do
-    expect do
+    expect {
       described_class.new("invalid_stanza", "with-gpg")
-    end.to raise_error(/Illegal stanza/)
+    }.to raise_error(/Illegal stanza/)
   end
 
   it "raises an exception when normal stanza is not present on cask" do
     command = described_class.new("caveats", "with-gpg")
-    expect do
+    expect {
       command.run
-    end.to raise_error(/no such stanza/)
+    }.to raise_error(/no such stanza/)
   end
 
   it "raises an exception when artifact stanza is not present on cask" do
     command = described_class.new("zap", "with-gpg")
-    expect do
+    expect {
       command.run
-    end.to raise_error(/no such stanza/)
+    }.to raise_error(/no such stanza/)
+  end
+
+  it "raises an exception when 'depends_on' stanza is not present on cask" do
+    command = described_class.new("depends_on", "with-gpg")
+    expect {
+      command.run
+    }.to raise_error(/no such stanza/)
   end
 
   it "shows all artifact stanzas when using 'artifacts' keyword" do
     command = described_class.new("artifacts", "with-gpg")
-    expect do
+    expect {
       command.run
-    end.to output("{:app=>[[\"Caffeine.app\"]]}\n").to_stdout
+    }.to output("{:app=>[[\"Caffeine.app\"]]}\n").to_stdout
   end
 end