From 3bfaa07d4fbb99d5805d81110d3acb66c6118105 Mon Sep 17 00:00:00 2001
From: Michael Miller <icy.arctic.fox@gmail.com>
Date: Sat, 26 Jan 2019 16:41:21 -0700
Subject: [PATCH] Add spec for nil matcher

---
 spec/matchers/nil_matcher_spec.cr | 55 +++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 spec/matchers/nil_matcher_spec.cr

diff --git a/spec/matchers/nil_matcher_spec.cr b/spec/matchers/nil_matcher_spec.cr
new file mode 100644
index 0000000..da65d8c
--- /dev/null
+++ b/spec/matchers/nil_matcher_spec.cr
@@ -0,0 +1,55 @@
+require "../spec_helper"
+
+describe Spectator::Matchers::NilMatcher do
+  describe "#match?" do
+    context "with nil" do
+      it "is true" do
+        value = nil.as(Bool?)
+        partial = Spectator::Expectations::ValueExpectationPartial.new(value)
+        matcher = Spectator::Matchers::NilMatcher.new
+        matcher.match?(partial).should be_true
+      end
+    end
+
+    context "with not nil" do
+      it "is false" do
+        value = true.as(Bool?)
+        partial = Spectator::Expectations::ValueExpectationPartial.new(value)
+        matcher = Spectator::Matchers::NilMatcher.new
+        matcher.match?(partial).should be_false
+      end
+    end
+  end
+
+  describe "#message" do
+    it "mentions nil" do
+      partial = Spectator::Expectations::ValueExpectationPartial.new(42)
+      matcher = Spectator::Matchers::NilMatcher.new
+      matcher.message(partial).should contain("nil")
+    end
+
+    it "contains the actual label" do
+      value = 42
+      label = "everything"
+      partial = Spectator::Expectations::ValueExpectationPartial.new(label, value)
+      matcher = Spectator::Matchers::NilMatcher.new
+      matcher.message(partial).should contain(label)
+    end
+  end
+
+  describe "#negated_message" do
+    it "mentions nil" do
+      partial = Spectator::Expectations::ValueExpectationPartial.new(42)
+      matcher = Spectator::Matchers::NilMatcher.new
+      matcher.negated_message(partial).should contain("nil")
+    end
+
+    it "contains the actual label" do
+      value = 42
+      label = "everything"
+      partial = Spectator::Expectations::ValueExpectationPartial.new(label, value)
+      matcher = Spectator::Matchers::NilMatcher.new
+      matcher.negated_message(partial).should contain(label)
+    end
+  end
+end