Chop the tests up

The test modules were getting huge, and some of its functions were
actually a huge amount of code due to macros, causing tests to take a
long time just to compile.  They are now separated into a few different
tests, and the scalar macros especially are now expanded more sparingly
in just a few `check()` functions.

Test compile times for me went from about 25 seconds to 1.5s in debug
mode, and from 300 seconds (!) to about 8s in release mode.

Author: cuviper

.gitignore

@@ -1,2 +1,4 @@
 Cargo.lock
 target
+*.bk
+*.orig

src/bigint.rs

@@ -32,10 +32,6 @@ use biguint::BigUint;
 use UsizePromotion;
 use IsizePromotion;
 
-#[cfg(test)]
-#[path = "tests/bigint.rs"]
-mod bigint_tests;
-
 /// A Sign is a `BigInt`'s composing element.
 #[derive(PartialEq, PartialOrd, Eq, Ord, Copy, Clone, Debug, Hash)]
 pub enum Sign {
@@ -1812,3 +1808,53 @@ fn twos_complement<'a, I>(digits: I)
         }
     }
 }
+
+
+#[test]
+fn test_from_biguint() {
+    fn check(inp_s: Sign, inp_n: usize, ans_s: Sign, ans_n: usize) {
+        let inp = BigInt::from_biguint(inp_s, FromPrimitive::from_usize(inp_n).unwrap());
+        let ans = BigInt {
+            sign: ans_s,
+            data: FromPrimitive::from_usize(ans_n).unwrap(),
+        };
+        assert_eq!(inp, ans);
+    }
+    check(Plus, 1, Plus, 1);
+    check(Plus, 0, NoSign, 0);
+    check(Minus, 1, Minus, 1);
+    check(NoSign, 1, NoSign, 0);
+}
+
+#[test]
+fn test_from_slice() {
+    fn check(inp_s: Sign, inp_n: u32, ans_s: Sign, ans_n: u32) {
+        let inp = BigInt::from_slice(inp_s, &[inp_n]);
+        let ans = BigInt {
+            sign: ans_s,
+            data: FromPrimitive::from_u32(ans_n).unwrap(),
+        };
+        assert_eq!(inp, ans);
+    }
+    check(Plus, 1, Plus, 1);
+    check(Plus, 0, NoSign, 0);
+    check(Minus, 1, Minus, 1);
+    check(NoSign, 1, NoSign, 0);
+}
+
+#[test]
+fn test_assign_from_slice() {
+    fn check(inp_s: Sign, inp_n: u32, ans_s: Sign, ans_n: u32) {
+        let mut inp = BigInt::from_slice(Minus, &[2627_u32, 0_u32, 9182_u32, 42_u32]);
+        inp.assign_from_slice(inp_s, &[inp_n]);
+        let ans = BigInt {
+            sign: ans_s,
+            data: FromPrimitive::from_u32(ans_n).unwrap(),
+        };
+        assert_eq!(inp, ans);
+    }
+    check(Plus, 1, Plus, 1);
+    check(Plus, 0, NoSign, 0);
+    check(Minus, 1, Minus, 1);
+    check(NoSign, 1, NoSign, 0);
+}

src/biguint.rs

@@ -38,10 +38,6 @@ use UsizePromotion;
 
 use ParseBigIntError;
 
-#[cfg(test)]
-#[path = "tests/biguint.rs"]
-mod biguint_tests;
-
 /// A big unsigned integer type.
 ///
 /// A `BigUint`-typed value `BigUint { data: vec!(a, b, c) }` represents a number
@@ -2277,3 +2273,32 @@ fn get_radix_base(radix: u32) -> (BigDigit, usize) {
         _   => panic!("Invalid bigdigit size")
     }
 }
+
+
+#[test]
+fn test_from_slice() {
+    fn check(slice: &[BigDigit], data: &[BigDigit]) {
+        assert!(BigUint::from_slice(slice).data == data);
+    }
+    check(&[1], &[1]);
+    check(&[0, 0, 0], &[]);
+    check(&[1, 2, 0, 0], &[1, 2]);
+    check(&[0, 0, 1, 2], &[0, 0, 1, 2]);
+    check(&[0, 0, 1, 2, 0, 0], &[0, 0, 1, 2]);
+    check(&[-1i32 as BigDigit], &[-1i32 as BigDigit]);
+}
+
+#[test]
+fn test_assign_from_slice() {
+    fn check(slice: &[BigDigit], data: &[BigDigit]) {
+        let mut p = BigUint::from_slice(&[2627_u32, 0_u32, 9182_u32, 42_u32]);
+        p.assign_from_slice(slice);
+        assert!(p.data == data);
+    }
+    check(&[1], &[1]);
+    check(&[0, 0, 0], &[]);
+    check(&[1, 2, 0, 0], &[1, 2]);
+    check(&[0, 0, 1, 2], &[0, 0, 1, 2]);
+    check(&[0, 0, 1, 2, 0, 0], &[0, 0, 1, 2]);
+    check(&[-1i32 as BigDigit], &[-1i32 as BigDigit]);
+}

src/lib.rs

@@ -127,18 +127,6 @@ impl From<ParseIntError> for ParseBigIntError {
     }
 }
 
-#[cfg(test)]
-use std::hash;
-
-#[cfg(test)]
-fn hash<T: hash::Hash>(x: &T) -> u64 {
-    use std::hash::{BuildHasher, Hasher};
-    use std::collections::hash_map::RandomState;
-    let mut hasher = <RandomState as BuildHasher>::Hasher::new();
-    x.hash(&mut hasher);
-    hasher.finish()
-}
-
 #[macro_use]
 mod macros;