Add tests parsing conditions that caused problems

.travis.yml

@@ -12,7 +12,6 @@ install:
   - rustfmt --version
 
 before_script:
-  - mkdir tests
   - cd tests
 
   - wget https://github.com/WrinklyNinja/testing-plugins/archive/1.4.1.tar.gz

appveyor.yml

@@ -16,7 +16,6 @@ install:
   - rustup component add rustfmt-preview
   - rustfmt --version
 
-  - ps: mkdir tests
   - cd tests
 
   - ps: (New-Object Net.WebClient).DownloadFile('https://github.com/WrinklyNinja/testing-plugins/archive/1.4.0.zip', "$PWD/1.4.0.zip")

tests/parsing.rs

@@ -0,0 +1,52 @@
+extern crate loot_condition_interpreter;
+
+use std::str::FromStr;
+
+use loot_condition_interpreter::{Error, Expression};
+
+fn expression(string: &str) -> Result<Expression, Error> {
+    Expression::from_str(string)
+}
+
+#[test]
+fn expression_parsing_should_ignore_whitespace_between_function_arguments() {
+    let e = expression("version(\"Cargo.toml\", \"1.2\", ==)");
+    assert!(e.is_ok());
+
+    let e = expression("version(\"Unofficial Oblivion Patch.esp\",\"3.4.0\",>=)");
+    assert!(e.is_ok());
+
+    let e = expression("version(\"Unofficial Skyrim Patch.esp\", \"2.0\", >=)");
+    assert!(e.is_ok());
+
+    let e = expression("version(\"..\\TESV.exe\", \"1.8\", >) and not checksum(\"EternalShineArmorAndWeapons.esp\",3E85A943)");
+    assert!(e.is_ok());
+
+    let e = expression("version(\"..\\TESV.exe\",\"1.8\",>) and not checksum(\"EternalShineArmorAndWeapons.esp\",3E85A943)");
+    assert!(e.is_ok());
+
+    let e = expression("checksum(\"HM_HotkeyMod.esp\",374C564C)");
+    assert!(e.is_ok());
+
+    let e = expression("checksum(\"HM_HotkeyMod.esp\",CF00AFFD)");
+    assert!(e.is_ok());
+
+    let e = expression(
+        "checksum(\"HM_HotkeyMod.esp\",374C564C) or checksum(\"HM_HotkeyMod.esp\",CF00AFFD)",
+    );
+    assert!(e.is_ok());
+
+    let e = expression(
+        "( checksum(\"HM_HotkeyMod.esp\",374C564C) or checksum(\"HM_HotkeyMod.esp\",CF00AFFD) )",
+    );
+    assert!(e.is_ok());
+
+    let e = expression("file(\"UFO - Ultimate Follower Overhaul.esp\")");
+    assert!(e.is_ok());
+
+    let e = expression("( checksum(\"HM_HotkeyMod.esp\",374C564C) or checksum(\"HM_HotkeyMod.esp\",CF00AFFD) ) and file(\"UFO - Ultimate Follower Overhaul.esp\")");
+    assert!(e.is_ok());
+
+    let e = expression("many(\"Deeper Thoughts (\\(Curie\\)|- (Expressive )?Curie)\\.esp\")");
+    assert!(e.is_ok());
+}