Isolate compiler selector tests

1 files changed, 89 insertions, 0 deletions

diff --git a/Library/Homebrew/test/test_compiler_selector.rb b/Library/Homebrew/test/test_compiler_selector.rb
new file mode 100644
index 000000000..6e3a36366
--- /dev/null
+++ b/Library/Homebrew/test/test_compiler_selector.rb
@@ -0,0 +1,89 @@
+require 'testing_env'
+require 'compilers'
+
+class CompilerSelectorTests < Test::Unit::TestCase
+  class Double
+    def initialize
+      @failures = []
+    end
+
+    def <<(cc)
+      @failures << cc
+    end
+
+    def fails_with?(cc)
+      return false if cc.nil?
+      @failures.include?(cc.name)
+    end
+  end
+
+  def setup
+    MacOS.stubs(:gcc_build_version).returns(5666)
+    MacOS.stubs(:llvm_build_version).returns(2336)
+    MacOS.stubs(:clang_build_version).returns(425)
+    @f  = Double.new
+    @cc = :clang
+  end
+
+  def actual_cc
+    CompilerSelector.new(@f, @cc).compiler
+  end
+
+  def test_all_compiler_failures
+    @f << :clang << :llvm << :gcc
+    assert_equal @cc, actual_cc
+  end
+
+  def test_no_compiler_failures
+    assert_equal @cc, actual_cc
+  end
+
+  def test_fails_with_clang
+    @f << :clang
+    assert_equal :llvm, actual_cc
+  end
+
+  def test_fails_with_llvm
+    @f << :llvm
+    assert_equal :clang, actual_cc
+  end
+
+  def test_fails_with_gcc
+    @f << :gcc
+    assert_equal :clang, actual_cc
+  end
+
+  def test_mixed_failures_1
+    @f << :clang << :llvm
+    assert_equal :gcc, actual_cc
+  end
+
+  def test_mixed_failures_2
+    @f << :gcc << :clang
+    assert_equal :llvm, actual_cc
+  end
+
+  def test_mixed_failures_3
+    @f << :llvm << :gcc
+    assert_equal :clang, actual_cc
+  end
+
+  def test_older_clang_precedence
+    MacOS.stubs(:clang_build_version).returns(211)
+    @f << :gcc
+    assert_equal :llvm, actual_cc
+  end
+
+  def test_missing_gcc
+    MacOS.stubs(:gcc_build_version).returns(nil)
+    @f << :clang << :llvm
+    assert_equal @cc, actual_cc
+  end
+
+  def test_missing_llvm_and_gcc
+    MacOS.stubs(:gcc_build_version).returns(nil)
+    MacOS.stubs(:llvm_build_version).returns(nil)
+    @f << :clang
+    assert_equal @cc, actual_cc
+  end
+end