Convert checksum_verification test to spec.

Library/Homebrew/test/checksum_verification_spec.rb

@@ -0,0 +1,36 @@
+require "formula"
+
+describe Formula do
+  def formula(&block)
+    super do
+      url "file://#{TEST_FIXTURE_DIR}/tarballs/testball-0.1.tbz"
+      instance_eval(&block)
+    end
+  end
+
+  describe "#brew" do
+    it "does not raise an error when the checksum matches" do
+      expect {
+        shutup do
+          f = formula do
+            sha256 TESTBALL_SHA256
+          end
+
+          f.brew {}
+        end
+      }.not_to raise_error
+    end
+
+    it "raises an error when the checksum doesn't match" do
+      expect {
+        shutup do
+          f = formula do
+            sha256 "dcbf5f44743b74add648c7e35e414076632fa3b24463d68d1f6afc5be77024f8"
+          end
+
+          f.brew {}
+        end
+      }.to raise_error(ChecksumMismatchError)
+    end
+  end
+end

Library/Homebrew/test/checksum_verification_test.rb

@@ -1,35 +0,0 @@
-require "testing_env"
-require "formula"
-
-class ChecksumVerificationTests < Homebrew::TestCase
-  def assert_checksum_good
-    assert_nothing_raised { shutup { @_f.brew {} } }
-  end
-
-  def assert_checksum_bad
-    assert_raises(ChecksumMismatchError) { shutup { @_f.brew {} } }
-  end
-
-  def formula(&block)
-    super do
-      url "file://#{TEST_FIXTURE_DIR}/tarballs/testball-0.1.tbz"
-      instance_eval(&block)
-    end
-  end
-
-  def test_good_sha256
-    formula do
-      sha256 TESTBALL_SHA256
-    end
-
-    assert_checksum_good
-  end
-
-  def test_bad_sha256
-    formula do
-      sha256 "dcbf5f44743b74add648c7e35e414076632fa3b24463d68d1f6afc5be77024f8"
-    end
-
-    assert_checksum_bad
-  end
-end