Bit moar specs, refs #7

spec/gphoto2_spec.cr

@@ -1,9 +1,23 @@
 require "./spec_helper"
 
+VERSION_PATTERN = /^\d+(\.\d+){1,3}(-\w+)?$/
+
 describe GPhoto2 do
+  describe "VERSION" do
+    it "should have proper format" do
+      GPhoto2::VERSION.should match VERSION_PATTERN
+    end
+  end
+
+  describe ".library_version" do
+    it "should have proper format" do
+      GPhoto2.library_version.should match VERSION_PATTERN
+    end
+  end
+
   describe ".result_as_string" do
     it "converts return code to proper string" do
-      codez = {
+      return_codes = {
         # libgphoto2
         LibGPhoto2::GP_ERROR_IO        => "I/O problem",
         LibGPhoto2::GP_ERROR_IO_LOCK   => "Could not lock the device",
@@ -12,21 +26,53 @@ describe GPhoto2 do
         LibGPhoto2::GP_ERROR_DIRECTORY_NOT_FOUND => "Directory not found",
         LibGPhoto2::GP_ERROR_CAMERA_BUSY         => "I/O in progress",
         LibGPhoto2::GP_ERROR_NO_SPACE            => "Not enough free space",
+        # random
+        -1    => "Unspecified error",
+        -777  => "Unknown error",
+        777   => "Unknown error",
       }
-      codez.each do |code, string|
-        GPhoto2.result_as_string(code).should eq(string)
+      return_codes.each do |code, string|
+        GPhoto2.result_as_string(code).should eq string
+      end
+    end
+  end
+
+  describe ".check?" do
+    context "the return code is GP_OK" do
+      it "returns true" do
+        GPhoto2.check?(LibGPhoto2::GP_OK).should be_true
+      end
+    end
+    context "the return code is not GP_OK" do
+      it "returns false" do
+        GPhoto2.check?(LibGPhoto2::GP_ERROR).should be_false
+      end
+    end
+    context "the return code is a value" do
+      it "returns true" do
+        GPhoto2.check?(10).should be_true
       end
     end
   end
 
   describe ".check!" do
+    context "the return code is GP_OK" do
+      it "should not raise" do
+        (GPhoto2.check!(LibGPhoto2::GP_OK) rescue :raised).should_not eq :raised
+      end
+    end
     context "the return code is not GP_OK" do
       it "raises GPhoto2::Error with a message and error code" do
-        code = -1
+        code = LibGPhoto2::GP_ERROR
         message = "Unspecified error (#{code})"
 
         expect_raises(GPhoto2::Error, message) { GPhoto2.check!(code) }
       end
     end
+    context "the return code is a value" do
+      it "returns back the value" do
+        GPhoto2.check!(10).should eq 10
+      end
+    end
   end
 end