Convert deps test to spec

Library/Homebrew/test/deps_spec.rb

@@ -0,0 +1,14 @@
+describe Homebrew do
+  describe "#deps" 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(cmd("deps", "foo")).to eq("")
+    expect(cmd("deps", "bar")).to eq("foo")
+    expect(cmd("deps", "baz")).to eq("bar\nfoo")
+  end
+end

Library/Homebrew/test/deps_test.rb

@@ -1,16 +0,0 @@
-require "testing_env"
-
-class IntegrationCommandTestDeps < IntegrationCommandTestCase
-  def test_deps
-    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("deps", "foo")
-    assert_equal "foo", cmd("deps", "bar")
-    assert_equal "bar\nfoo", cmd("deps", "baz")
-  end
-end