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crystal/hello-world/spec/hello_world_spec.cr

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+require "spec"
+require "../src/*"
+
+describe "HelloWorld" do
+  it "no name" do
+    HelloWorld.hello.should eq("Hello, World!")
+  end
+
+  pending "sample name" do
+    HelloWorld.hello("Alice").should eq("Hello, Alice!")
+  end
+
+  pending "other sample name" do
+    HelloWorld.hello("Bob").should eq("Hello, Bob!")
+  end
+end

crystal/hello-world/src/hello_world.cr

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+# Please implement your solution to hello-world in this file