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Add tests for change.from
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Michael Miller
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2 changed files with 228 additions and 0 deletions
191
spec/matchers/change_from_matcher_spec.cr
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191
spec/matchers/change_from_matcher_spec.cr
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@ -0,0 +1,191 @@
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require "../spec_helper"
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describe Spectator::Matchers::ChangeFromMatcher do
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describe "#match" do
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context "returned MatchData" do
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context "with a static expression" do
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describe "#matched?" do
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it "is false" do
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i = 0
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partial = new_block_partial { i += 0 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(i) { i }
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match_data = matcher.match(partial)
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match_data.matched?.should be_false
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end
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end
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end
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context "with changing expression" do
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describe "#matched?" do
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it "is true" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(i) { i }
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match_data = matcher.match(partial)
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match_data.matched?.should be_true
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end
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end
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describe "#values" do
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context "expected before" do
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it "is the expected value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(0) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"expected before").value.should eq(0)
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end
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end
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context "actual before" do
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it "is the initial value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(0) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"actual before").value.should eq(0)
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end
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end
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context "expected after" do
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it "is the negated initial value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(0) { i }
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match_data = matcher.match(partial)
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match_data_value_sans_prefix(match_data.values, :"expected after")[:value].should eq(0)
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match_data_value_sans_prefix(match_data.values, :"expected after")[:to_s].should start_with("Not ")
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end
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end
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context "actual after" do
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it "is the resulting value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(0) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"actual after").value.should eq(5)
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end
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end
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end
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describe "#message" do
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it "contains the action label" do
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i = 0
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label = "ACTION"
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partial = new_block_partial(label) { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(i) { i }
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match_data = matcher.match(partial)
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match_data.message.should contain(label)
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end
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it "contains the expression label" do
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i = 0
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label = "EXPRESSION"
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(label, i) { i }
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match_data = matcher.match(partial)
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match_data.message.should contain(label)
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end
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end
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describe "#negated_message" do
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it "contains the action label" do
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i = 0
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label = "ACTION"
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partial = new_block_partial(label) { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(i) { i }
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match_data = matcher.match(partial)
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match_data.negated_message.should contain(label)
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end
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it "contains the expression label" do
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i = 0
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label = "EXPRESSION"
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(label, i) { i }
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match_data = matcher.match(partial)
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match_data.negated_message.should contain(label)
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end
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end
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end
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context "with the wrong initial value" do
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describe "#matched?" do
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it "is false" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(2) { i }
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match_data = matcher.match(partial)
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match_data.matched?.should be_false
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end
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end
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describe "#values" do
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context "expected before" do
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it "is the expected value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(2) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"expected before").value.should eq(2)
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end
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end
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context "actual before" do
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it "is the initial value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(2) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"actual before").value.should eq(0)
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end
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end
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context "expected after" do
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it "is the negated initial value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(2) { i }
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match_data = matcher.match(partial)
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match_data_value_sans_prefix(match_data.values, :"expected after")[:value].should eq(2)
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match_data_value_sans_prefix(match_data.values, :"expected after")[:to_s].should start_with("Not ")
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end
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end
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context "actual after" do
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it "is the resulting value" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(2) { i }
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match_data = matcher.match(partial)
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match_data_value_with_key(match_data.values, :"actual after").value.should eq(5)
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end
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end
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end
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describe "#message" do
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it "contains the expression label" do
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i = 0
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label = "EXPRESSION"
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(label, 2) { i }
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match_data = matcher.match(partial)
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match_data.message.should contain(label)
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end
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end
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describe "#negated_message" do
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it "contains the expression label" do
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i = 0
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label = "EXPRESSION"
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeFromMatcher.new(label, 2) { i }
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match_data = matcher.match(partial)
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match_data.negated_message.should contain(label)
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end
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end
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end
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end
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end
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end
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@ -3,6 +3,18 @@ require "../spec_helper"
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describe Spectator::Matchers::ChangeMatcher do
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describe "#match" do
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context "returned MatchData" do
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context "with a static expression" do
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describe "#matched?" do
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it "is false" do
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i = 0
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partial = new_block_partial { i += 0 }
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matcher = Spectator::Matchers::ChangeMatcher.new { i }
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match_data = matcher.match(partial)
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match_data.matched?.should be_false
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end
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end
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end
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context "with changing expression" do
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describe "#matched?" do
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it "is true" do
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@ -78,4 +90,29 @@ describe Spectator::Matchers::ChangeMatcher do
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end
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end
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end
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describe "#from" do
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it "returns a ChangeFromMatcher" do
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i = 0
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matcher = Spectator::Matchers::ChangeMatcher.new { i }
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matcher.from(0).should be_a(Spectator::Matchers::ChangeFromMatcher(Int32, Int32))
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end
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it "passes along the expression" do
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i = 0
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeMatcher.new { i }
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match_data = matcher.from(0).match(partial)
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i.should eq(5) # Local scope `i` will be updated if the expression (closure) was passed on.
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end
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it "passes along the label" do
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i = 0
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label = "EXPRESSION"
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partial = new_block_partial { i += 5 }
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matcher = Spectator::Matchers::ChangeMatcher.new(label) { i }
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match_data = matcher.from(0).match(partial)
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match_data.message.should contain(label)
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end
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end
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end
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