Support assert_empty, assert_kind_of, assert_instance_of

CHANGELOG.md

@@ -11,7 +11,8 @@ of [keepachangelog.com][2].
 
 ### Added
 
-- None
+- [#25](https://github.com/jaredbeck/minitest_to_rspec/pull/25) -
+  Support `assert_empty`, `assert_kind_of`, `assert_instance_of`
 
 ### Fixed
 

lib/minitest_to_rspec/input/subprocessors/call.rb

@@ -55,10 +55,22 @@ def be_nil
           matcher(:be_nil)
         end
 
+        def be_empty
+          matcher(:be_empty)
+        end
+
         def be_truthy
           matcher(:be_truthy)
         end
 
+        def be_a(exp)
+          matcher(:be_a, exp)
+        end
+
+        def be_instance_of(exp)
+          matcher(:be_instance_of, exp)
+        end
+
         def call_to_question_mark?(exp)
           sexp_type?(:call, exp) && Model::Call.new(exp).question_mark_method?
         end
@@ -95,12 +107,28 @@ def method_assert_not_nil
           expect_to_not(be_nil, @exp.arguments[0], true)
         end
 
+        def method_assert_empty
+          expect_to(be_empty, @exp.arguments[0], true)
+        end
+
         def method_assert_not_equal
           expected = @exp.arguments[0]
           calculated = @exp.arguments[1]
           expect_to_not(eq(expected), calculated, true)
         end
 
+        def method_assert_kind_of
+          expected = @exp.arguments[0]
+          calculated = @exp.arguments[1]
+          expect_to(be_a(expected), calculated, true)
+        end
+
+        def method_assert_instance_of
+          expected = @exp.arguments[0]
+          calculated = @exp.arguments[1]
+          expect_to(be_instance_of(expected), calculated, true)
+        end
+
         def method_expects
           if @exp.num_arguments == 1 &&
              %i[lit hash].include?(@exp.arguments.first.sexp_type)

spec/fixtures/29_assert_empty/in.rb

@@ -0,0 +1,2 @@
+assert_empty(Banana.new)
+assert_empty(Banana.new, "Expected empty banana skin but got delicious content")

spec/fixtures/29_assert_empty/out.rb

@@ -0,0 +1,2 @@
+expect(Banana.new).to(be_empty)
+expect(Banana.new).to(be_empty)

spec/fixtures/30_assert_kind_of/in.rb

@@ -0,0 +1,2 @@
+assert_kind_of(Banana, Banana.new)
+assert_kind_of(Banana, Banana.new, "Expected Banana to be a kind of Banana")

spec/fixtures/30_assert_kind_of/out.rb

@@ -0,0 +1,2 @@
+expect(Banana.new).to(be_a(Banana))
+expect(Banana.new).to(be_a(Banana))

spec/fixtures/31_assert_instance_of/in.rb

@@ -0,0 +1,2 @@
+assert_instance_of(Banana, Banana.new)
+assert_instance_of(Banana, Banana.new, "Expected Banana to be an actual Banana")

spec/fixtures/31_assert_instance_of/out.rb

@@ -0,0 +1,2 @@
+expect(Banana.new).to(be_instance_of(Banana))
+expect(Banana.new).to(be_instance_of(Banana))