tests: add test for test calls audit cop

Library/Homebrew/test/rubocops/class_cop_spec.rb

@@ -48,6 +48,36 @@ describe RuboCop::Cop::FormulaAudit::ClassName do
   end
 end
 
+describe RuboCop::Cop::FormulaAudit::TestCalls do
+  subject(:cop) { described_class.new }
+
+  it "reports an offense when /usr/local/bin is found in test calls" do
+    expect_offense(<<~RUBY)
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+          system "/usr/local/bin/test"
+                 ^^^^^^^^^^^^^^^^^^^^^ use \#{bin} instead of /usr/local/bin in system
+        end
+      end
+    RUBY
+  end
+
+  it "reports an offense when passing 0 as the second parameter to shell_output" do
+    expect_offense(<<~RUBY)
+      class Foo < Formula
+        url 'https://example.com/foo-1.0.tgz'
+
+        test do
+          shell_output("\#{bin}/test", 0)
+                                      ^ Passing 0 to shell_output() is redundant
+        end
+      end
+    RUBY
+  end
+end
+
 describe RuboCop::Cop::FormulaAuditStrict::Test do
   subject(:cop) { described_class.new }