test/cmd: test Bash logic.

Library/Homebrew/test/cmd/--caskroom_spec.rb

@@ -1,23 +1,19 @@
 # typed: false
 # frozen_string_literal: true
 
-describe "brew --caskroom", :integration_test do
-  let(:local_transmission) {
-    Cask::CaskLoader.load(cask_path("local-transmission"))
-  }
+require "cmd/shared_examples/args_parse"
 
-  let(:local_caffeine) {
-    Cask::CaskLoader.load(cask_path("local-caffeine"))
-  }
+describe "brew --caskroom" do
+  it_behaves_like "parseable arguments"
 
-  it "outputs Homebrew's caskroom" do
-    expect { brew "--caskroom" }
-      .to output("#{HOMEBREW_PREFIX/"Caskroom"}\n").to_stdout
+  it "prints Homebrew's Caskroom", :integration_test do
+    expect { brew_sh "--caskroom" }
+      .to output("#{ENV["HOMEBREW_PREFIX"]}/Caskroom\n").to_stdout
       .and not_to_output.to_stderr
       .and be_a_success
   end
 
-  it "outputs the caskroom path of casks" do
+  it "prints the Caskroom for Casks", :integration_test do
     expect { brew "--caskroom", cask_path("local-transmission"), cask_path("local-caffeine") }
       .to output("#{HOMEBREW_PREFIX/"Caskroom"/"local-transmission"}\n" \
                  "#{HOMEBREW_PREFIX/"Caskroom"/"local-caffeine\n"}").to_stdout

Library/Homebrew/test/cmd/--cellar_spec.rb

@@ -6,7 +6,14 @@ require "cmd/shared_examples/args_parse"
 describe "brew --cellar" do
   it_behaves_like "parseable arguments"
 
-  it "returns the Cellar subdirectory for a given Formula", :integration_test do
+  it "prints Homebrew's Cellar", :integration_test do
+    expect { brew_sh "--cellar" }
+      .to output("#{ENV["HOMEBREW_CELLAR"]}\n").to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+  end
+
+  it "prints the Cellar for a Formula", :integration_test do
     expect { brew "--cellar", testball }
       .to output(%r{#{HOMEBREW_CELLAR}/testball}o).to_stdout
       .and not_to_output.to_stderr

Library/Homebrew/test/cmd/--prefix_spec.rb

@@ -6,9 +6,16 @@ require "cmd/shared_examples/args_parse"
 describe "brew --prefix" do
   it_behaves_like "parseable arguments"
 
-  it "prints a given Formula's prefix", :integration_test do
-    expect { brew "--prefix", testball }
-      .to output("#{HOMEBREW_PREFIX}/opt/testball\n").to_stdout
+  it "prints Homebrew's prefix", :integration_test do
+    expect { brew_sh "--prefix" }
+      .to output("#{ENV["HOMEBREW_PREFIX"]}\n").to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+  end
+
+  it "prints the prefix for a Formula", :integration_test do
+    expect { brew_sh "--prefix", "wget" }
+      .to output("#{ENV["HOMEBREW_PREFIX"]}/opt/wget\n").to_stdout
       .and not_to_output.to_stderr
       .and be_a_success
   end

Library/Homebrew/test/cmd/--repository_spec.rb

@@ -6,7 +6,14 @@ require "cmd/shared_examples/args_parse"
 describe "brew --repository" do
   it_behaves_like "parseable arguments"
 
-  it "prints the path of a given Tap", :integration_test do
+  it "prints Homebrew's repository", :integration_test do
+    expect { brew_sh "--repository" }
+      .to output("#{ENV["HOMEBREW_REPOSITORY"]}\n").to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+  end
+
+  it "prints a Tap's repository", :integration_test do
     expect { brew "--repository", "foo/bar" }
       .to output("#{HOMEBREW_LIBRARY}/Taps/foo/homebrew-bar\n").to_stdout
       .and not_to_output.to_stderr