Many and Some

1 files changed, 35 insertions, 0 deletions

diff --git a/spec/parcom_spec.cr b/spec/parcom_spec.cr
index 86ad93a..870b0a2 100644
--- a/spec/parcom_spec.cr
+++ b/spec/parcom_spec.cr
@@ -380,5 +380,40 @@ describe Parser do
       result.value.should eq('b')
     end
   end
+
+  describe "#many" do
+    p = Parser(Char, Char).token('a').many
+
+    it "returns no results if it never succeeds" do
+      ["", "bb"].each do |s|
+        tokens = Tokens.from_string(s)
+        result = p.parse(tokens)
+
+        result.value.empty?.should be_true
+        result.tokens.should eq(tokens)
+      end
+    end
+
+    it "parses as many times as possible" do
+      ["a", "aaa", "aaaaa"].each do |s|
+        tokens = Tokens.from_string(s)
+        result = p.parse(tokens)
+
+        result.value.should eq(s.chars)
+        result.tokens.empty?.should be_true
+      end
+    end
+  end
+
+  describe "#some" do
+    p = Parser(Char, Char).token('a').some
+
+    it "fails if it cannot parse at least once" do
+      ["", "bb"].each do |s|
+        tokens = Tokens.from_string(s)
+        expect_raises(ParserFail) { p.parse(tokens) }
+      end
+    end
+  end
 end