Merge pull request #2127 from reitermarkus/spec-uses

Convert `brew uses` test to spec.

Library/Homebrew/test/cmd/uses_spec.rb

+describe "brew uses", :integration_test do
+  it "prints the Formulae a given Formula is used by" do
+    setup_test_formula "foo"
+    setup_test_formula "bar"
+    setup_test_formula "baz", <<-EOS.undent
+      url "https://example.com/baz-1.0"
+      depends_on "bar"
+    EOS
+
+    expect { brew "uses", "baz" }
+      .to be_a_success
+      .and not_to_output.to_stdout
+      .and not_to_output.to_stderr
+
+    expect { brew "uses", "bar" }
+      .to output("baz\n").to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+
+    expect { brew "uses", "--recursive", "foo" }
+      .to output(/(bar\nbaz|baz\nbar)/).to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+  end
+end

Library/Homebrew/test/uses_test.rb

-require "testing_env"
-
-class IntegrationCommandTestUses < IntegrationCommandTestCase
-  def test_uses
-    setup_test_formula "foo"
-    setup_test_formula "bar"
-    setup_test_formula "baz", <<-EOS.undent
-      url "https://example.com/baz-1.0"
-      depends_on "bar"
-    EOS
-
-    assert_equal "", cmd("uses", "baz")
-    assert_equal "baz", cmd("uses", "bar")
-    assert_match(/(bar\nbaz|baz\nbar)/, cmd("uses", "--recursive", "foo"))
-  end
-end