Organize the matchers a bit more

1 files changed, 92 insertions, 0 deletions

diff --git a/spec/shared/relation_spec.rb b/spec/shared/relation_spec.rb
new file mode 100644
index 0000000000..c492ca847e
--- /dev/null
+++ b/spec/shared/relation_spec.rb
@@ -0,0 +1,92 @@
+share_examples_for 'A Relation' do
+
+  before :all do
+    # The two needed instance variables need to be set in a
+    # before :all callback.
+    #   @relation is the relation being tested here.
+    #   @expected is an array of the elements that are expected to be in
+    #     the relation.
+    %w[ @relation @expected ].each do |ivar|
+      raise "#{ivar} needs to be defined" unless instance_variable_get(ivar)
+    end
+
+    # There needs to be enough items to be able to run all the tests
+    raise "@expected needs to have at least 6 items" unless @expected.length >= 6
+  end
+
+  describe "#each" do
+    it "iterates over the rows in any order" do
+      @relation.should have_rows(@expected)
+    end
+  end
+
+  describe "#where" do
+    before :all do
+      @expected = @expected.sort_by { |r| r[@relation[:age]] }
+      @pivot = @expected[@expected.length / 2]
+    end
+
+    it "finds rows with an equal to predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] == @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].eq(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a not predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] != @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].not(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a less than predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] < @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].lt(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a less than or equal to predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] <= @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].lteq(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a greater than predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] > @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].gt(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a greater than or equal to predicate" do
+      expected = @expected.select { |r| r[@relation[:age]] >= @pivot[@relation[:age]] }
+      @relation.where(@relation[:age].gteq(@pivot[@relation[:age]])).should have_rows(expected)
+    end
+
+    it "finds rows with a matches predicate"
+
+    it "finds rows with an in predicate" do
+      pending
+      set = @expected[1..(@expected.length/2+1)]
+      @relation.all(:id.in => set.map { |r| r.id }).should have_resources(set)
+    end
+  end
+
+  describe "#order" do
+    describe "by one attribute" do
+      before :all do
+        @expected.map! { |r| r[@relation[:age]] }
+        @expected.sort!
+      end
+
+      it "can be specified as ascending order" do
+        actual = []
+        @relation.order(@relation[:age].asc).each { |r| actual << r[@relation[:age]] }
+        actual.should == @expected
+      end
+
+      it "can be specified as descending order" do
+        actual = []
+        @relation.order(@relation[:age].desc).each { |r| actual << r[@relation[:age]] }
+        actual.should == @expected.reverse
+      end
+    end
+
+    describe "by two attributes" do
+      it "works"
+    end
+  end
+end
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