From 7eabc41ad41e0da58fff2a6bb04212ea0cd3baa2 Mon Sep 17 00:00:00 2001
From: Carlo Zancanaro <carlo@zancanaro.id.au>
Date: Wed, 3 Jun 2015 12:39:14 +1000
Subject: Add some more interesting tests
---
.../zancanaro/javacheck/ListFunctorRulesTest.java | 110 +++++++++++++++++++++
.../javacheck/OptionalFunctorRulesTest.java | 110 +++++++++++++++++++++
.../javacheck/SimpleListOperationsTest.java | 48 +++++++++
.../javacheck/junit/SimpleListOperationsTest.java | 44 ---------
4 files changed, 268 insertions(+), 44 deletions(-)
create mode 100644 src/test/java/au/id/zancanaro/javacheck/ListFunctorRulesTest.java
create mode 100644 src/test/java/au/id/zancanaro/javacheck/OptionalFunctorRulesTest.java
create mode 100644 src/test/java/au/id/zancanaro/javacheck/SimpleListOperationsTest.java
delete mode 100644 src/test/java/au/id/zancanaro/javacheck/junit/SimpleListOperationsTest.java
(limited to 'src/test/java/au/id/zancanaro/javacheck')
diff --git a/src/test/java/au/id/zancanaro/javacheck/ListFunctorRulesTest.java b/src/test/java/au/id/zancanaro/javacheck/ListFunctorRulesTest.java
new file mode 100644
index 0000000..4e516a2
--- /dev/null
+++ b/src/test/java/au/id/zancanaro/javacheck/ListFunctorRulesTest.java
@@ -0,0 +1,110 @@
+package au.id.zancanaro.javacheck;
+
+import au.id.zancanaro.javacheck.annotations.DataSource;
+import au.id.zancanaro.javacheck.annotations.Property;
+import au.id.zancanaro.javacheck.junit.Properties;
+import org.junit.runner.RunWith;
+
+import java.util.List;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import static au.id.zancanaro.javacheck.Generators.*;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Properties.class)
+public class ListFunctorRulesTest {
+
+ private final static int runs = 1000;
+ private final static int maxSize = 1000;
+
+ @DataSource
+ public static Generator<List<Integer>> listOfIntegers = listOf(integer());
+
+ @DataSource
+ public static Generator<Function<Integer, Integer>> integerFunction =
+ oneOf(
+ integer().map(ListFunctorRulesTest::plusI),
+ integer().map(ListFunctorRulesTest::timesI),
+ integer().map(ListFunctorRulesTest::constantlyI));
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mappingCompositionsWithStreams(
+ List<Integer> list,
+ Function<Integer, Integer> f,
+ Function<Integer, Integer> g) {
+ List<Integer> left = list.stream()
+ .map(g)
+ .map(f)
+ .collect(Collectors.toList());
+
+ List<Integer> right = list.stream()
+ .map(x -> f.apply(g.apply(x)))
+ .collect(Collectors.toList());
+
+ assertEquals(left, right);
+ }
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mappingCompositionsWithIntermediateList(
+ List<Integer> list,
+ Function<Integer, Integer> f,
+ Function<Integer, Integer> g) {
+ List<Integer> intermediate = list.stream().map(g).collect(Collectors.toList());
+ List<Integer> left = intermediate.stream().map(f).collect(Collectors.toList());
+
+ List<Integer> right = list.stream()
+ .map(x -> f.apply(g.apply(x)))
+ .collect(Collectors.toList());
+
+ assertEquals(left, right);
+ }
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mapIdentityIsIdentity(List<Integer> list) {
+ List<Integer> mapped = list.stream().map(x -> x).collect(Collectors.toList());
+
+ assertEquals(list, mapped);
+ }
+
+ private static Function<Integer,Integer> plusI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i + integer;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> x + " + i;
+ }
+ };
+ }
+
+ private static Function<Integer,Integer> timesI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i * integer;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> x * " + i;
+ }
+ };
+ }
+ private static Function<Integer,Integer> constantlyI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> " + i;
+ }
+ };
+ }
+}
diff --git a/src/test/java/au/id/zancanaro/javacheck/OptionalFunctorRulesTest.java b/src/test/java/au/id/zancanaro/javacheck/OptionalFunctorRulesTest.java
new file mode 100644
index 0000000..b13fb8b
--- /dev/null
+++ b/src/test/java/au/id/zancanaro/javacheck/OptionalFunctorRulesTest.java
@@ -0,0 +1,110 @@
+package au.id.zancanaro.javacheck;
+
+import au.id.zancanaro.javacheck.annotations.DataSource;
+import au.id.zancanaro.javacheck.annotations.Property;
+import au.id.zancanaro.javacheck.junit.Properties;
+import org.junit.runner.RunWith;
+
+import java.util.Optional;
+import java.util.function.Function;
+
+import static au.id.zancanaro.javacheck.Generator.pure;
+import static au.id.zancanaro.javacheck.Generators.integer;
+import static au.id.zancanaro.javacheck.Generators.oneOf;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Properties.class)
+public class OptionalFunctorRulesTest {
+
+ private final static int runs = 1000;
+ private final static int maxSize = 1000;
+
+ @DataSource
+ public static Generator<Optional<Integer>> listOfIntegers = oneOf(
+ pure(Optional.empty()),
+ integer().map(Optional::of));
+
+ @DataSource
+ public static Generator<Function<Integer, Integer>> integerFunction =
+ oneOf(
+ integer().map(OptionalFunctorRulesTest::plusI),
+ integer().map(OptionalFunctorRulesTest::timesI),
+ integer().map(OptionalFunctorRulesTest::constantlyI));
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mappingCompositionsWithStreams(
+ Optional<Integer> optional,
+ Function<Integer, Integer> f,
+ Function<Integer, Integer> g) {
+ Optional<Integer> left = optional
+ .map(g)
+ .map(f);
+
+ Optional<Integer> right = optional
+ .map(x -> f.apply(g.apply(x)));
+
+ assertEquals(left, right);
+ }
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mappingCompositionsWithIntermediateList(
+ Optional<Integer> optional,
+ Function<Integer, Integer> f,
+ Function<Integer, Integer> g) {
+ Optional<Integer> intermediate = optional.map(g);
+ Optional<Integer> left = intermediate.map(f);
+
+ Optional<Integer> right = optional
+ .map(x -> f.apply(g.apply(x)));
+
+ assertEquals(left, right);
+ }
+
+ @Property(maxSize = maxSize, runs = runs)
+ public void mapIdentityIsIdentity(Optional<Integer> optional) {
+ Optional<Integer> mapped = optional.map(x -> x);
+
+ assertEquals(optional, mapped);
+ }
+
+ private static Function<Integer,Integer> plusI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i + integer;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> x + " + i;
+ }
+ };
+ }
+
+ private static Function<Integer,Integer> timesI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i * integer;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> x * " + i;
+ }
+ };
+ }
+ private static Function<Integer,Integer> constantlyI(final int i) {
+ return new Function<Integer, Integer>() {
+ @Override
+ public Integer apply(Integer integer) {
+ return i;
+ }
+
+ @Override
+ public String toString() {
+ return "x -> " + i;
+ }
+ };
+ }
+}
diff --git a/src/test/java/au/id/zancanaro/javacheck/SimpleListOperationsTest.java b/src/test/java/au/id/zancanaro/javacheck/SimpleListOperationsTest.java
new file mode 100644
index 0000000..972b5b6
--- /dev/null
+++ b/src/test/java/au/id/zancanaro/javacheck/SimpleListOperationsTest.java
@@ -0,0 +1,48 @@
+package au.id.zancanaro.javacheck;
+
+import au.id.zancanaro.javacheck.Generator;
+import au.id.zancanaro.javacheck.annotations.DataSource;
+import au.id.zancanaro.javacheck.annotations.Property;
+import au.id.zancanaro.javacheck.junit.Properties;
+import org.junit.runner.RunWith;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import static au.id.zancanaro.javacheck.Generators.*;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Properties.class)
+public class SimpleListOperationsTest {
+
+ private final static int runs = 1000;
+ private final static int maxSize = 1000;
+
+ @DataSource
+ public static Generator<List<Integer>> listOfIntegers = listOf(integer());
+
+ @DataSource
+ public static Generator<List<String>> listOfStrings = listOf(stringOf(alphaNumericCharacter()));
+
+ @Property(maxSize = maxSize, runs = runs)
+ 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);
+
+ assertEquals(left, right);
+ }
+
+ @Property(maxSize = 100, runs = runs)
+ public void reverseIsItsOwnInverse(List<String> list) {
+ List<String> reversed = new ArrayList<>(list);
+ Collections.reverse(reversed);
+ Collections.reverse(reversed);
+
+ assertEquals(list, reversed);
+ }
+}
diff --git a/src/test/java/au/id/zancanaro/javacheck/junit/SimpleListOperationsTest.java b/src/test/java/au/id/zancanaro/javacheck/junit/SimpleListOperationsTest.java
deleted file mode 100644
index 089451e..0000000
--- a/src/test/java/au/id/zancanaro/javacheck/junit/SimpleListOperationsTest.java
+++ /dev/null
@@ -1,44 +0,0 @@
-package au.id.zancanaro.javacheck.junit;
-
-import au.id.zancanaro.javacheck.Generator;
-import au.id.zancanaro.javacheck.annotations.DataSource;
-import au.id.zancanaro.javacheck.annotations.Property;
-import org.junit.runner.RunWith;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
-import static au.id.zancanaro.javacheck.Generators.*;
-import static org.junit.Assert.assertEquals;
-
-@RunWith(Properties.class)
-public class SimpleListOperationsTest {
-
- @DataSource
- public static Generator<List<Integer>> listOfIntegers = listOf(integer());
-
- @DataSource
- public static Generator<List<String>> listOfStrings = listOf(stringOf(alphaNumericCharacter()));
-
- @Property(maxSize = 100, runs = 1000)
- 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);
-
- assertEquals(left, right);
- }
-
- @Property(maxSize = 100, runs = 1000)
- public void reverseIsItsOwnInverse(List<String> list) {
- List<String> reversed = new ArrayList<>(list);
- Collections.reverse(reversed);
- Collections.reverse(reversed);
-
- assertEquals(list, reversed);
- }
-}
--
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