dev-cmd: only one integration test per command.

Integration tests are useful in detecting breakages but much slower so
let's only use one per command and install formula outside the
integration test framework (which is also slow).

Library/Homebrew/extend/os/linux/keg_relocate.rb

@@ -17,6 +17,7 @@ class Keg
     return if !file.elf? || !file.dynamic_elf?
 
     patchelf = DevelopmentTools.locate "patchelf"
+
     cmd_rpath = [patchelf, "--print-rpath", file]
     old_rpath = Utils.popen_read(*cmd_rpath, err: :out).strip
 

Library/Homebrew/formula_installer.rb

@@ -15,6 +15,7 @@ require "cache_store"
 require "linkage_checker"
 require "install"
 require "messages"
+require "cask/cask_loader"
 
 class FormulaInstaller
   include FormulaCellarChecks
@@ -68,6 +69,10 @@ class FormulaInstaller
     @attempted ||= Set.new
   end
 
+  def self.clear_attempted
+    @attempted = Set.new
+  end
+
   # When no build tools are available and build flags are passed through ARGV,
   # it's necessary to interrupt the user before any sort of installation
   # can proceed. Only invoked when the user has no developer tools.

Library/Homebrew/test/dev-cmd/bottle_spec.rb

@@ -1,23 +1,19 @@
 describe "brew bottle", :integration_test do
   it "builds a bottle for the given Formula" do
-    begin
+    # create stub patchelf
-      expect { brew "install", "--build-bottle", testball }
+    if OS.linux?
-        .to be_a_success
-
       setup_test_formula "patchelf"
-      (HOMEBREW_CELLAR/"patchelf/1.0/bin").mkpath
+      patchelf = HOMEBREW_CELLAR/"patchelf/1.0/bin/patchelf"
+      patchelf.dirname.mkpath
+      patchelf.write <<~EOS
+        #!/bin/sh
+        exit 0
+      EOS
+      FileUtils.chmod "+x", patchelf
+      FileUtils.ln_s patchelf, HOMEBREW_PREFIX/"bin/patchelf"
+    end
 
-      expect { brew "bottle", "--no-rebuild", testball }
+    install_test_formula "testball", build_bottle: true
-        .to output(/Formula not from core or any installed taps/).to_stderr
-        .and not_to_output.to_stdout
-        .and be_a_failure
-
-      expect { brew "bottle", "--root-url" }
-        .to output(/missing argument: --root-url/).to_stderr
-        .and not_to_output.to_stdout
-        .and be_a_failure
-
-      setup_test_formula "testball"
 
     # `brew bottle` should not fail with dead symlink
     # https://github.com/Homebrew/legacy-homebrew/issues/49007
@@ -29,8 +25,5 @@ describe "brew bottle", :integration_test do
       .to output(/testball--0\.1.*\.bottle\.tar\.gz/).to_stdout
       .and not_to_output.to_stderr
       .and be_a_success
-    ensure
-      FileUtils.rm_f Dir.glob("testball--0.1*.bottle.tar.gz")
-    end
   end
 end

Library/Homebrew/test/dev-cmd/extract_spec.rb

@@ -15,12 +15,6 @@ describe "brew extract", :integration_test do
       system "git", "add", "--all"
       system "git", "commit", "-m", "testball 0.2"
     end
-    expect { brew "extract", "testball", target.name }
-      .to be_a_success
-
-    expect(path/"Formula/testball@0.2.rb").to exist
-
-    expect(Formulary.factory(path/"Formula/testball@0.2.rb").version).to be == "0.2"
 
     expect { brew "extract", "testball", target.name, "--version=0.1" }
       .to be_a_success

Library/Homebrew/test/dev-cmd/irb_spec.rb

@@ -14,11 +14,4 @@ describe "brew irb", :integration_test do
       .and not_to_output.to_stderr
       .and be_a_success
   end
-
-  specify "--examples" do
-    expect { brew "irb", "--examples" }
-      .to output(/'v8'\.f # => instance of the v8 formula/).to_stdout
-      .and not_to_output.to_stderr
-      .and be_a_success
-  end
 end

Library/Homebrew/test/dev-cmd/linkage_spec.rb

@@ -10,10 +10,4 @@ describe "brew linkage", :integration_test do
       .and not_to_output.to_stdout
       .and not_to_output.to_stderr
   end
-
-  it "works when one argument is provided" do
-    expect { brew "linkage", "testball" }
-      .to be_a_success
-      .and not_to_output.to_stderr
-  end
 end

Library/Homebrew/test/dev-cmd/pull_spec.rb

@@ -5,24 +5,6 @@ describe "brew pull", :integration_test do
       system "git", "checkout", "-b", "new-branch"
     end
 
-    expect { brew "pull", "https://jenkins.brew.sh/job/Homebrew\%20Testing/1028/" }
-      .to output(/Testing URLs require `\-\-bottle`!/).to_stderr
-      .and not_to_output.to_stdout
-      .and be_a_failure
-
-    # Needs Homebrew/homebrew-core
-    if OS.mac?
-      expect { brew "pull", "1" }
-        .to output(/Fetching patch/).to_stdout
-        .and output(/Current branch is new\-branch/).to_stderr
-        .and be_a_failure
-    end
-
-    expect { brew "pull", "--bump", "https://api.github.com/repos/Homebrew/homebrew-core/pulls/122" }
-      .to output(/Fetching patch/).to_stdout
-      .and output(/Can only bump one changed formula/).to_stderr
-      .and be_a_failure
-
     expect { brew "pull", "https://github.com/Homebrew/brew/pull/1249" }
       .to output(/Fetching patch/).to_stdout
       .and output(/Patch failed to apply/).to_stderr

Library/Homebrew/test/dev-cmd/test_spec.rb

@@ -1,27 +1,12 @@
 describe "brew test", :integration_test do
   it "tests a given Formula" do
-    setup_test_formula "testball", <<~RUBY
+    install_test_formula "testball", <<~'RUBY'
-      head "https://github.com/example/testball2.git"
-
-      devel do
-        url "file://#{TEST_FIXTURE_DIR}/tarballs/testball-0.1.tbz"
-        sha256 "#{TESTBALL_SHA256}"
-      end
-
-      keg_only "just because"
-
       test do
+        assert_equal "test", shell_output("#{bin}/test")
       end
     RUBY
 
-    expect { brew "install", "testball" }.to be_a_success
+    expect { brew "test", "--verbose", "testball" }
-
-    expect { brew "test", "--HEAD", "testball" }
-      .to output(/Testing testball/).to_stdout
-      .and not_to_output.to_stderr
-      .and be_a_success
-
-    expect { brew "test", "--devel", "testball" }
       .to output(/Testing testball/).to_stdout
       .and not_to_output.to_stderr
       .and be_a_success

Library/Homebrew/test/spec_helper.rb

@@ -140,6 +140,7 @@ RSpec.configure do |config|
 
     begin
       Tap.clear_cache
+      FormulaInstaller.clear_attempted
 
       TEST_DIRECTORIES.each(&:mkpath)
 
@@ -189,6 +190,7 @@ RSpec.configure do |config|
         CoreTap.instance.path/".git",
         CoreTap.instance.alias_dir,
         CoreTap.instance.path/"formula_renames.json",
+        *Pathname.glob("#{HOMEBREW_CELLAR}/*/"),
       ]
 
       files_after_test = find_files

Library/Homebrew/test/support/helper/spec/shared_context/integration_test.rb

@@ -1,5 +1,7 @@
 require "open3"
 
+require "formula_installer"
+
 RSpec::Matchers.define_negated_matcher :be_a_failure, :be_a_success
 
 RSpec.shared_context "integration test" do
@@ -140,7 +142,7 @@ RSpec.shared_context "integration test" do
           (prefix/"foo"/"test").write("test") if build.with? "foo"
           prefix.install Dir["*"]
           (buildpath/"test.c").write \
-            "#include <stdio.h>\\nint main(){return printf(\\"test\\");}"
+            "#include <stdio.h>\\nint main(){printf(\\"test\\");return 0;}"
           bin.mkpath
           system ENV.cc, "test.c", "-o", bin/"test"
         end
@@ -173,6 +175,15 @@ RSpec.shared_context "integration test" do
     end
   end
 
+  def install_test_formula(name, content = nil, build_bottle: false)
+    setup_test_formula(name, content)
+    fi = FormulaInstaller.new(Formula[name])
+    fi.build_bottle = build_bottle
+    fi.prelude
+    fi.install
+    fi.finish
+  end
+
   def setup_remote_tap(name)
     Tap.fetch(name).tap do |tap|
       next if tap.installed?