Add spec for BeComparison

spec/matchers/be_comparison_spec.cr

@@ -0,0 +1,102 @@
+require "../spec_helper"
+
+# This is a terrible hack,
+# but I don't want to expose `ValueMatcher#expected` publicly
+# just for this spec.
+module Spectator::Matchers
+  struct ValueMatcher(ExpectedType)
+    def expected_value
+      expected
+    end
+  end
+end
+
+def be_comparison
+  Spectator::Matchers::BeComparison.new
+end
+
+describe Spectator::Matchers::BeComparison do
+  describe "#<" do
+    it "returns a LessThanMatcher" do
+      value = 0
+      matcher = be_comparison < value
+      matcher.should be_a(Spectator::Matchers::LessThanMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison < value
+      matcher.expected_value.should eq(value)
+    end
+  end
+
+  describe "#<=" do
+    it "returns a LessThanEqualMatcher" do
+      value = 0
+      matcher = be_comparison <= value
+      matcher.should be_a(Spectator::Matchers::LessThanEqualMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison <= value
+      matcher.expected_value.should eq(value)
+    end
+  end
+
+  describe "#>" do
+    it "returns a GreaterThanMatcher" do
+      value = 0
+      matcher = be_comparison > value
+      matcher.should be_a(Spectator::Matchers::GreaterThanMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison > value
+      matcher.expected_value.should eq(value)
+    end
+  end
+
+  describe "#>=" do
+    it "returns a GreaterThanEqualMatcher" do
+      value = 0
+      matcher = be_comparison >= value
+      matcher.should be_a(Spectator::Matchers::GreaterThanEqualMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison >= value
+      matcher.expected_value.should eq(value)
+    end
+  end
+
+  describe "#==" do
+    it "returns an EqualityMatcher" do
+      value = 0
+      matcher = be_comparison == value
+      matcher.should be_a(Spectator::Matchers::EqualityMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison == value
+      matcher.expected_value.should eq(value)
+    end
+  end
+
+  describe "#!=" do
+    it "returns an InequalityMatcher" do
+      value = 0
+      matcher = be_comparison != value
+      matcher.should be_a(Spectator::Matchers::InequalityMatcher(typeof(value)))
+    end
+
+    it "passes along the expected value" do
+      value = 42
+      matcher = be_comparison != value
+      matcher.expected_value.should eq(value)
+    end
+  end
+end