Autocorrect various rules (#253)

spec/ameba/ext/location_spec.cr

@@ -0,0 +1,54 @@
+require "../../spec_helper"
+
+describe Crystal::Location do
+  subject = Crystal::Location.new(nil, 2, 3)
+
+  describe "#with" do
+    it "changes line number" do
+      subject.with(line_number: 1).to_s.should eq ":1:3"
+    end
+
+    it "changes column number" do
+      subject.with(column_number: 1).to_s.should eq ":2:1"
+    end
+
+    it "changes line and column numbers" do
+      subject.with(line_number: 1, column_number: 2).to_s.should eq ":1:2"
+    end
+  end
+
+  describe "#adjust" do
+    it "adjusts line number" do
+      subject.adjust(line_number: 1).to_s.should eq ":3:3"
+    end
+
+    it "adjusts column number" do
+      subject.adjust(column_number: 1).to_s.should eq ":2:4"
+    end
+
+    it "adjusts line and column numbers" do
+      subject.adjust(line_number: 1, column_number: 2).to_s.should eq ":3:5"
+    end
+  end
+
+  describe "#seek" do
+    it "adjusts column number if line offset is 1" do
+      subject.seek(Crystal::Location.new(nil, 1, 2)).to_s.should eq ":2:4"
+    end
+
+    it "adjusts line number and changes column number if line offset is greater than 1" do
+      subject.seek(Crystal::Location.new(nil, 2, 1)).to_s.should eq ":3:1"
+    end
+
+    it "adjusts line number and changes column number if line offset is less than 1" do
+      subject.seek(Crystal::Location.new(nil, 0, 1)).to_s.should eq ":1:1"
+    end
+
+    it "raises exception if filenames don't match" do
+      expect_raises(ArgumentError, "Mismatching filenames:\n  source.cr\n  source2.cr") do
+        location = Crystal::Location.new("source.cr", 1, 1)
+        location.seek(Crystal::Location.new("source2.cr", 1, 1))
+      end
+    end
+  end
+end