AST parsing

closes #2

spec/ameba/rules/line_length_spec.cr

@@ -6,17 +6,17 @@ module Ameba::Rules
 
   describe LineLength do
     it "passes if all lines are shorter than 80 symbols" do
-      source = Source.new "", "short line"
+      source = Source.new "short line"
       subject.catch(source).valid?.should be_true
     end
 
     it "fails if there is at least one line longer than 79 symbols" do
-      source = Source.new "", long_line
+      source = Source.new long_line
       subject.catch(source).valid?.should be_false
     end
 
     it "reports rule, pos and message" do
-      source = Source.new "", long_line
+      source = Source.new long_line
       subject.catch(source).valid?.should be_false
 
       error = source.errors.first

spec/ameba/rules/trailing_blank_lines_spec.cr

@@ -5,27 +5,27 @@ module Ameba::Rules
 
   describe TrailingBlankLines do
     it "passes if there is no blank lines at the end" do
-      source = Source.new "", "no-blankline"
+      source = Source.new "no-blankline"
       subject.catch(source).valid?.should be_true
     end
 
     it "fails if there is a blank line at the end of a source" do
-      source = Source.new "", "a = 1\n \n "
+      source = Source.new "a = 1\n \n "
       subject.catch(source).valid?.should be_false
     end
 
     it "passes if source is empty" do
-      source = Source.new "", ""
+      source = Source.new ""
       subject.catch(source).valid?.should be_true
     end
 
     it "passes if last line is not blank" do
-      source = Source.new "", "\n\n\n puts 22"
+      source = Source.new "\n\n\n puts 22"
       subject.catch(source).valid?.should be_true
     end
 
     it "reports rule, pos and message" do
-      source = Source.new "", "a = 1\n\n "
+      source = Source.new "a = 1\n\n "
       subject.catch(source)
 
       error = source.errors.first

spec/ameba/rules/trailing_whitespace_spec.cr

@@ -5,17 +5,17 @@ module Ameba::Rules
 
   describe TrailingWhitespace do
     it "passes if all lines do not have trailing whitespace" do
-      source = Source.new "", "no-whispace"
+      source = Source.new "no-whispace"
       subject.catch(source).valid?.should be_true
     end
 
     it "fails if there is a line with trailing whitespace" do
-      source = Source.new "", "whitespace at the end "
+      source = Source.new "whitespace at the end "
       subject.catch(source).valid?.should be_false
     end
 
     it "reports rule, pos and message" do
-      source = Source.new "", "a = 1\n b = 2 "
+      source = Source.new "a = 1\n b = 2 "
       subject.catch(source).valid?.should be_false
 
       error = source.errors.first

spec/ameba/source_spec.cr

@@ -3,20 +3,17 @@ require "../spec_helper"
 module Ameba
   describe Source do
     describe ".new" do
-      it "allows to create a source by file path" do
-        Source.new(__FILE__).path.should eq __FILE__
-      end
-
       it "allows to create a source by content and path" do
-        s = Source.new(__FILE__, "content")
-        s.path.should eq __FILE__
-        s.lines.should eq %w(content)
+        s = Source.new("content", "path")
+        s.path.should eq "path"
+        s.content.should eq "content"
+        s.lines.should eq ["content"]
       end
     end
 
     describe "#error" do
       it "adds and error" do
-        s = Source.new(__FILE__)
+        s = Source.new ""
         s.error(DummyRule.new, 23, "Error!")
         s.errors.size.should eq 1
         s.errors.first.rule.should_not be_nil
@@ -24,5 +21,15 @@ module Ameba
         s.errors.first.message.should eq "Error!"
       end
     end
+
+    describe "#ast" do
+      it "returns ast nodes" do
+        s = Source.new %(
+          class A; end
+          class B; end
+        )
+        s.ast.to_s.should eq "class A\nend\nclass B\nend\n"
+      end
+    end
   end
 end