1 files changed, 60 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_ext_cargo_builder_unit.rb b/test/rubygems/test_gem_ext_cargo_builder_unit.rb
new file mode 100644
index 0000000000..89495b84ff
--- /dev/null
+++ b/test/rubygems/test_gem_ext_cargo_builder_unit.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+require_relative "helper"
+require "rubygems/ext"
+
+class TestGemExtCargoBuilderUnit < Gem::TestCase
+  def test_cargo_command_passes_args
+    skip_unsupported_platforms!
+    builder = Gem::Ext::CargoBuilder.new
+    command = builder.cargo_command(Dir.pwd, @tempdir, ["--all-features"])
+
+    assert_includes command, "--all-features"
+  end
+
+  def test_cargo_command_locks_in_release_profile
+    skip_unsupported_platforms!
+    builder = Gem::Ext::CargoBuilder.new
+    builder.profile = :release
+    command = builder.cargo_command(Dir.pwd, @tempdir)
+
+    assert_includes command, "--locked"
+  end
+
+  def test_cargo_command_passes_respects_cargo_env_var
+    skip_unsupported_platforms!
+    old_cargo = ENV["CARGO"]
+    ENV["CARGO"] = "mycargo"
+    builder = Gem::Ext::CargoBuilder.new
+    command = builder.cargo_command(Dir.pwd, @tempdir)
+
+    assert_includes command, "mycargo"
+  ensure
+    ENV["CARGO"] = old_cargo
+  end
+
+  def test_build_env_includes_rbconfig
+    skip_unsupported_platforms!
+    builder = Gem::Ext::CargoBuilder.new
+    env = builder.build_env
+
+    assert_equal env.fetch("RBCONFIG_RUBY_SO_NAME"), RbConfig::CONFIG["RUBY_SO_NAME"]
+  end
+
+  def test_cargo_command_passes_respects_cargo_build_target
+    skip_unsupported_platforms!
+    old_cargo = ENV["CARGO_BUILD_TARGET"]
+    ENV["CARGO_BUILD_TARGET"] = "x86_64-unknown-linux-gnu"
+    builder = Gem::Ext::CargoBuilder.new
+    command = builder.cargo_command(Dir.pwd, @tempdir, ["--locked"])
+
+    assert_includes command, "--target"
+    assert_includes command, "x86_64-unknown-linux-gnu"
+  ensure
+    ENV["CARGO_BUILD_TARGET"] = old_cargo
+  end
+
+  def skip_unsupported_platforms!
+    pend "jruby not supported" if Gem.java_platform?
+  end
+end