Add a bunch of specs for attribute type casting.

1 files changed, 57 insertions, 0 deletions

diff --git a/spec/attributes/boolean_spec.rb b/spec/attributes/boolean_spec.rb
new file mode 100644
index 0000000000..bb7eeb886d
--- /dev/null
+++ b/spec/attributes/boolean_spec.rb
@@ -0,0 +1,57 @@
+require 'spec_helper'
+
+module Arel
+  describe "Attributes::Boolean" do
+
+    before :all do
+      @relation = Model.build do |r|
+        r.engine Testing::Engine.new
+        r.attribute :awesome, Attributes::Boolean
+      end
+    end
+
+    def type_cast(val)
+      @relation[:awesome].type_cast(val)
+    end
+
+    describe "#type_cast" do
+      it "returns same value if passed a boolean" do
+        val = true
+        type_cast(val).should eql(val)
+      end
+
+      it "returns boolean representation (false) of nil" do
+        type_cast(nil).should eql(false)
+      end
+
+      it "returns boolean representation of 'true', 'false'" do
+        type_cast('true').should eql(true)
+        type_cast('false').should eql(false)
+      end
+
+      it "returns boolean representation of :true, :false" do
+        type_cast(:true).should eql(true)
+        type_cast(:false).should eql(false)
+      end
+
+      it "returns boolean representation of 0, 1" do
+        type_cast(1).should == true
+        type_cast(0).should == false
+      end
+
+      it "calls #to_s on arbitrary objects" do
+        obj = Object.new
+        obj.extend Module.new { def to_s ; 'true' ; end }
+        type_cast(obj).should == true
+      end
+
+      [ Object.new, 'string', '00.0', 5 ].each do |value|
+        it "raises exception when attempting type_cast of non-boolean value #{value.inspect}" do
+          lambda do
+            type_cast(value)
+          end.should raise_error(TypecastError, /could not typecast/)
+        end
+      end
+    end
+  end
+end
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