1 files changed, 39 insertions, 0 deletions
diff --git a/specs/Specs/ArgsSpec.hs b/specs/Specs/ArgsSpec.hs
new file mode 100644
index 0000000..caaab75
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+++ b/specs/Specs/ArgsSpec.hs
@@ -0,0 +1,39 @@
+module Specs.ArgsSpec where
+
+import Chelleport.Args (parseArgs)
+import Chelleport.Types
+import Data.Default (Default (def))
+import Test.Hspec
+
+test :: SpecWith ()
+test = do
+  describe "#parseArgs" $ do
+    context "when there are no args" $ do
+      it "parses default configuration" $ do
+        let config = parseArgs []
+        config `shouldBe` Right def
+
+    context "when args contains --help" $ do
+      it "enables show help without parsing the rest of the args" $ do
+        parseArgs ["--help"] `shouldBe` Right (def {configShowHelp = True})
+        parseArgs ["--help", "-m", "mode"] `shouldBe` Right (def {configShowHelp = True})
+
+    context "when args contains -m or --mode with a valid mode" $ do
+      it "parses configuration with mode" $ do
+        parseArgs ["-m", "search"] `shouldBe` Right (def {configMode = defaultSearchMode})
+        parseArgs ["--mode", "search"] `shouldBe` Right (def {configMode = defaultSearchMode})
+        parseArgs ["-m", "hints"] `shouldBe` Right (def {configMode = defaultHintsMode})
+        parseArgs ["--mode", "hints"] `shouldBe` Right (def {configMode = defaultHintsMode})
+
+    context "when args contains -m or --mode with an invalid mode" $ do
+      it "returns with error message" $ do
+        parseArgs ["--mode", "invalidmode"] `shouldBe` Left "Invalid mode: invalidmode"
+        parseArgs ["-m", "invalidmode"] `shouldBe` Left "Invalid mode: invalidmode"
+
+    context "when args contains -m or --mode without any mode" $ do
+      it "returns with error message" $ do
+        parseArgs ["--mode"] `shouldBe` Left "Missing value for mode"
+
+    context "when args contains an invalid flag" $ do
+      it "enables show help without parsing the rest of the args" $ do
+        parseArgs ["--foobar"] `shouldBe` Left "Unrecognized argument: --foobar"