Convert CompilerSelector test to spec.
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Markus Reiter
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Library/Homebrew/test/compiler_selector_spec.rb
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122
Library/Homebrew/test/compiler_selector_spec.rb
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require "compilers"
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require "software_spec"
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describe CompilerSelector do
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subject { described_class.new(software_spec, versions, compilers) }
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let(:compilers) { [:clang, :gcc, :llvm, :gnu] }
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let(:software_spec) { SoftwareSpec.new }
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let(:cc) { :clang }
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let(:versions) do
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double(
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gcc_4_0_build_version: Version::NULL,
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gcc_build_version: Version.create("5666"),
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llvm_build_version: Version::NULL,
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clang_build_version: Version.create("425"),
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)
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end
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before(:each) do
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allow(versions).to receive(:non_apple_gcc_version) do |name|
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case name
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when "gcc-4.8" then Version.create("4.8.1")
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when "gcc-4.7" then Version.create("4.7.1")
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else Version::NULL
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end
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end
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end
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describe "#compiler" do
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it "raises an error if no matching compiler can be found" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(:llvm)
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software_spec.fails_with(:gcc)
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software_spec.fails_with(gcc: "4.8")
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software_spec.fails_with(gcc: "4.7")
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expect { subject.compiler }.to raise_error(CompilerSelectionError)
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end
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it "defaults to cc" do
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expect(subject.compiler).to eq(cc)
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end
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it "returns gcc if it fails with clang" do
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software_spec.fails_with(:clang)
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expect(subject.compiler).to eq(:gcc)
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end
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it "returns clang if it fails with llvm" do
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software_spec.fails_with(:llvm)
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expect(subject.compiler).to eq(:clang)
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end
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it "returns clang if it fails with gcc" do
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software_spec.fails_with(:gcc)
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expect(subject.compiler).to eq(:clang)
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end
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it "returns clang if it fails with non-Apple gcc" do
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software_spec.fails_with(gcc: "4.8")
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expect(subject.compiler).to eq(:clang)
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end
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it "still returns gcc-4.8 if it fails with gcc without a specific version" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(:gcc)
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expect(subject.compiler).to eq("gcc-4.8")
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end
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it "returns gcc if it fails with clang and llvm" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(:llvm)
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expect(subject.compiler).to eq(:gcc)
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end
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it "returns clang if it fails with gcc and llvm" do
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software_spec.fails_with(:gcc)
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software_spec.fails_with(:llvm)
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expect(subject.compiler).to eq(:clang)
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end
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example "returns gcc if it fails with a specific gcc version" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(gcc: "4.8")
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expect(subject.compiler).to eq(:gcc)
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end
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example "returns a lower version of gcc if it fails with the highest version" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(:gcc)
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software_spec.fails_with(:llvm)
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software_spec.fails_with(gcc: "4.8")
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expect(subject.compiler).to eq("gcc-4.7")
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end
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it "prefers gcc" do
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software_spec.fails_with(:clang)
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software_spec.fails_with(:gcc)
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expect(subject.compiler).to eq("gcc-4.8")
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end
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it "raises an error when gcc is missing" do
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allow(versions).to receive(:gcc_build_version).and_return(Version::NULL)
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software_spec.fails_with(:clang)
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software_spec.fails_with(:llvm)
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software_spec.fails_with(gcc: "4.8")
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software_spec.fails_with(gcc: "4.7")
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expect { subject.compiler }.to raise_error(CompilerSelectionError)
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end
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it "raises an error when llvm and gcc are missing" do
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allow(versions).to receive(:gcc_build_version).and_return(Version::NULL)
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software_spec.fails_with(:clang)
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software_spec.fails_with(gcc: "4.8")
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software_spec.fails_with(gcc: "4.7")
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expect { subject.compiler }.to raise_error(CompilerSelectionError)
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end
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end
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end
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require "testing_env"
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require "compilers"
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require "software_spec"
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class CompilerSelectorTests < Homebrew::TestCase
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class Double < SoftwareSpec
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def <<(cc)
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fails_with(cc)
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self
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end
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end
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class CompilerVersions
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attr_accessor :gcc_4_0_build_version, :gcc_build_version,
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:clang_build_version
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def initialize
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@gcc_4_0_build_version = Version::NULL
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@gcc_build_version = Version.create("5666")
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@llvm_build_version = Version::NULL
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@clang_build_version = Version.create("425")
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end
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def non_apple_gcc_version(name)
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case name
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when "gcc-4.8" then Version.create("4.8.1")
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when "gcc-4.7" then Version.create("4.7.1")
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else Version::NULL
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end
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end
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end
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def setup
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super
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@f = Double.new
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@cc = :clang
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@versions = CompilerVersions.new
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@selector = CompilerSelector.new(
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@f, @versions, [:clang, :gcc, :llvm, :gnu]
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)
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end
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def actual_cc
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@selector.compiler
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end
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def test_all_compiler_failures
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@f << :clang << :llvm << :gcc << { gcc: "4.8" } << { gcc: "4.7" }
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assert_raises(CompilerSelectionError) { actual_cc }
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end
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def test_no_compiler_failures
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assert_equal @cc, actual_cc
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end
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def test_fails_with_clang
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@f << :clang
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assert_equal :gcc, actual_cc
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end
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def test_fails_with_llvm
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@f << :llvm
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assert_equal :clang, actual_cc
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end
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def test_fails_with_gcc
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@f << :gcc
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assert_equal :clang, actual_cc
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end
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def test_fails_with_non_apple_gcc
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@f << { gcc: "4.8" }
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assert_equal :clang, actual_cc
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end
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def test_mixed_failures_1
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@f << :clang << :gcc
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assert_equal "gcc-4.8", actual_cc
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end
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def test_mixed_failures_2
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@f << :clang << :llvm
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assert_equal :gcc, actual_cc
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end
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def test_mixed_failures_3
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@f << :gcc << :llvm
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assert_equal :clang, actual_cc
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end
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def test_mixed_failures_4
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@f << :clang << { gcc: "4.8" }
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assert_equal :gcc, actual_cc
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end
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def test_mixed_failures_5
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@f << :clang << :gcc << :llvm << { gcc: "4.8" }
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assert_equal "gcc-4.7", actual_cc
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end
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def test_gcc_precedence
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@f << :clang << :gcc
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assert_equal "gcc-4.8", actual_cc
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end
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def test_missing_gcc
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@versions.gcc_build_version = Version::NULL
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@f << :clang << :llvm << { gcc: "4.8" } << { gcc: "4.7" }
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assert_raises(CompilerSelectionError) { actual_cc }
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end
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def test_missing_llvm_and_gcc
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@versions.gcc_build_version = Version::NULL
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@f << :clang << { gcc: "4.8" } << { gcc: "4.7" }
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assert_raises(CompilerSelectionError) { actual_cc }
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end
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end
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