Merge pull request #271 from kauhat/feature/supported-methods

Add SUPPORTED_COMPRESSION_METHODS constant

src/compression.rs

@@ -142,23 +142,8 @@ impl fmt::Display for CompressionMethod {
     }
 }
 
-#[cfg(test)]
-mod test {
-    use super::CompressionMethod;
-
-    #[test]
-    fn from_eq_to() {
-        for v in 0..(u16::MAX as u32 + 1) {
-            #[allow(deprecated)]
-            let from = CompressionMethod::from_u16(v as u16);
-            #[allow(deprecated)]
-            let to = from.to_u16() as u32;
-            assert_eq!(v, to);
-        }
-    }
-
-    fn methods() -> Vec<CompressionMethod> {
-        vec![
+/// The compression methods which have been implemented.
+pub const SUPPORTED_COMPRESSION_METHODS: &[CompressionMethod] = &[
     CompressionMethod::Stored,
     #[cfg(any(
         feature = "deflate",
@@ -170,7 +155,21 @@ mod test {
     CompressionMethod::Bzip2,
     #[cfg(feature = "zstd")]
     CompressionMethod::Zstd,
-        ]
+];
+
+#[cfg(test)]
+mod test {
+    use super::{CompressionMethod, SUPPORTED_COMPRESSION_METHODS};
+
+    #[test]
+    fn from_eq_to() {
+        for v in 0..(u16::MAX as u32 + 1) {
+            #[allow(deprecated)]
+            let from = CompressionMethod::from_u16(v as u16);
+            #[allow(deprecated)]
+            let to = from.to_u16() as u32;
+            assert_eq!(v, to);
+        }
     }
 
     #[test]
@@ -185,7 +184,7 @@ mod test {
             assert_eq!(to, back);
         }
 
-        for method in methods() {
+        for &method in SUPPORTED_COMPRESSION_METHODS {
             check_match(method);
         }
     }
@@ -198,7 +197,7 @@ mod test {
             assert_eq!(debug_str, display_str);
         }
 
-        for method in methods() {
+        for &method in SUPPORTED_COMPRESSION_METHODS {
             check_match(method);
         }
     }

src/lib.rs

@@ -5,7 +5,7 @@
 
 #![warn(missing_docs)]
 
-pub use crate::compression::CompressionMethod;
+pub use crate::compression::{CompressionMethod, SUPPORTED_COMPRESSION_METHODS};
 pub use crate::read::ZipArchive;
 pub use crate::types::DateTime;
 pub use crate::write::ZipWriter;