From a4b5a5f904fe9f21697cd8fc8998c7e6e86306af Mon Sep 17 00:00:00 2001
From: Carlo Zancanaro <carlo@zancanaro.id.au>
Date: Sun, 31 May 2015 23:47:38 +1000
Subject: Lots more updates

+ add a list generator, and some more number generators.
+ bugfix the assumption checking stuff: if it failed once it would pretty
  likely continue to fail!
+ write some simple actualy properties:
  - reverse . reverse = id
  - sort . sort = sort
---
 src/test/java/au/id/zancanaro/PropertyTests.java | 43 ++++++++++++++++++------
 1 file changed, 33 insertions(+), 10 deletions(-)

(limited to 'src/test')

diff --git a/src/test/java/au/id/zancanaro/PropertyTests.java b/src/test/java/au/id/zancanaro/PropertyTests.java
index 374a974..dd595e1 100644
--- a/src/test/java/au/id/zancanaro/PropertyTests.java
+++ b/src/test/java/au/id/zancanaro/PropertyTests.java
@@ -1,35 +1,58 @@
 package au.id.zancanaro;
 
 import au.id.zancanaro.annotations.Property;
+import au.id.zancanaro.annotations.Seed;
+import org.hamcrest.CoreMatchers;
 import org.junit.*;
 import org.junit.experimental.theories.DataPoint;
+import org.junit.matchers.JUnitMatchers;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
 @RunWith(PropertyTestRunner.class)
 public class PropertyTests {
     public static Generator<Integer> gen = Generators.integer();
+    public static Generator<List<Integer>> list = Generators.listOf(Generators.integer());
 
-    @Test
-    public void testblah() throws Exception {
-        Assert.assertEquals(10, 11);
-
-    }
-
+    @Ignore
     @Property
     public void aIsNotOdd(int a, int b) {
-        Assume.assumeFalse(a % 2 == 1);
         Assert.assertFalse(a % 2 == 1);
     }
 
+    @Ignore
     @Property
     public void aIsNotLessThanB(int a, int b) {
-        Assume.assumeFalse(a < b);
         Assert.assertFalse(a < b);
     }
 
+    @Ignore
     @Property
     public void aPlusBLessThanOneHundred(int a, int b) {
-        Assert.assertTrue("a plus b is five", a + b == 5);
-        Assert.assertEquals(a + b, 5);
+        Assert.assertTrue(a + b < 100);
+    }
+
+    @Property
+    public void sortingIsIdempotent(List<Integer> list) {
+        List<Integer> left = new ArrayList<>(list);
+        Collections.sort(left);
+
+        List<Integer> right = new ArrayList<>(list);
+        Collections.sort(right);
+        Collections.sort(right);
+
+        Assert.assertEquals(left, right);
+    }
+
+    @Property
+    public void reverseIsItsOwnInverse(List<Integer> list) {
+        List<Integer> reversed = new ArrayList<>(list);
+        Collections.reverse(reversed);
+        Collections.reverse(reversed);
+
+        Assert.assertEquals(list, reversed);
     }
 }
-- 
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