Merge pull request #2119 from reitermarkus/spec-migrate

Convert `brew migrate` test to spec.

Library/Homebrew/test/cmd/migrate_spec.rb

+describe "brew migrate", :integration_test do
+  before(:each) do
+    setup_test_formula "testball1"
+    setup_test_formula "testball2"
+  end
+
+  it "fails when no argument is given" do
+    expect { brew "migrate" }
+      .to output(/Invalid usage/).to_stderr
+      .and not_to_output.to_stdout
+      .and be_a_failure
+  end
+
+  it "fails when a given Formula doesn't exist" do
+    expect { brew "migrate", "testball" }
+      .to output(/No available formula with the name "testball"/).to_stderr
+      .and not_to_output.to_stdout
+      .and be_a_failure
+  end
+
+  it "fails if a given Formula doesn't replace another one" do
+    expect { brew "migrate", "testball1" }
+      .to output(/testball1 doesn't replace any formula/).to_stderr
+      .and not_to_output.to_stdout
+      .and be_a_failure
+  end
+
+  it "migrates a renamed Formula" do
+    install_and_rename_coretap_formula "testball1", "testball2"
+
+    expect { brew "migrate", "testball1" }
+      .to output(/Migrating testball1 to testball2/).to_stdout
+      .and not_to_output.to_stderr
+      .and be_a_success
+  end
+
+  it "fails if a given Formula is not installed" do
+    install_and_rename_coretap_formula "testball1", "testball2"
+    (HOMEBREW_CELLAR/"testball1").rmtree
+
+    expect { brew "migrate", "testball1" }
+      .to output(/Error: No such keg/).to_stderr
+      .and not_to_output.to_stdout
+      .and be_a_failure
+  end
+end

Library/Homebrew/test/migrate_test.rb

-require "testing_env"
-
-class IntegrationCommandTestMigrate < IntegrationCommandTestCase
-  def test_migrate
-    setup_test_formula "testball1"
-    setup_test_formula "testball2"
-    assert_match "Invalid usage", cmd_fail("migrate")
-    assert_match "No available formula with the name \"testball\"",
-      cmd_fail("migrate", "testball")
-    assert_match "testball1 doesn't replace any formula",
-      cmd_fail("migrate", "testball1")
-
-    install_and_rename_coretap_formula "testball1", "testball2"
-    assert_match "Migrating testball1 to testball2", cmd("migrate", "testball1")
-    (HOMEBREW_CELLAR/"testball1").unlink
-    assert_match "Error: No such keg", cmd_fail("migrate", "testball1")
-  end
-end