From 2a23eaced6a4b0f3241430fb8d9d177a482ca907 Mon Sep 17 00:00:00 2001
From: "Carol (Nichols || Goulding)" <carol.nichols@gmail.com>
Date: Sun, 20 Sep 2015 18:31:41 -0400
Subject: Add some exercises about tests!

---
 tests/tests1.rs | 44 ++++++++++++++++++++++++++++++++++++++++++++
 tests/tests2.rs | 43 +++++++++++++++++++++++++++++++++++++++++++
 tests/tests3.rs | 42 ++++++++++++++++++++++++++++++++++++++++++
 tests/tests4.rs | 18 ++++++++++++++++++
 4 files changed, 147 insertions(+)
 create mode 100644 tests/tests1.rs
 create mode 100644 tests/tests2.rs
 create mode 100644 tests/tests3.rs
 create mode 100644 tests/tests4.rs

(limited to 'tests')

diff --git a/tests/tests1.rs b/tests/tests1.rs
new file mode 100644
index 0000000..15f810a
--- /dev/null
+++ b/tests/tests1.rs
@@ -0,0 +1,44 @@
+// This test has a problem with it -- make the test compile! Make the test
+// pass! Make the test fail! Scroll down for hints :)
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn you_can_assert() {
+        assert!();
+    }
+}
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+// You don't even need to write any code to test -- you can just test values and run that, even
+// though you wouldn't do that in real life :) `assert!` is a macro that needs an argument.
+// Depending on the value of the argument, `assert!` will do nothing (in which case the test will
+// pass) or `assert!` will panic (in which case the test will fail). So try giving different values
+// to `assert!` and see which ones compile, which ones pass, and which ones fail :)
diff --git a/tests/tests2.rs b/tests/tests2.rs
new file mode 100644
index 0000000..0ae6ddb
--- /dev/null
+++ b/tests/tests2.rs
@@ -0,0 +1,43 @@
+// This test has a problem with it -- make the test compile! Make the test
+// pass! Make the test fail! Scroll down for hints :)
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn you_can_assert_eq() {
+        assert_eq!();
+    }
+}
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+// Like the previous exercise, you don't need to write any code to get this test to compile and
+// run. `assert_eq!` is a macro that takes two arguments and compares them. Try giving it two
+// values that are equal! Try giving it two arguments that are different! Try giving it two values
+// that are of different types! Try switching which argument comes first and which comes second!
diff --git a/tests/tests3.rs b/tests/tests3.rs
new file mode 100644
index 0000000..1ee0f29
--- /dev/null
+++ b/tests/tests3.rs
@@ -0,0 +1,42 @@
+// This test isn't testing our function -- make it do that in such a way that
+// the test passes. Then write a second test that tests that we get the result
+// we expect to get when we call `is_even(5)`. Scroll down for hints!
+
+pub fn is_even(num: i32) -> bool {
+    num % 2 == 0
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn is_true_when_even() {
+        assert!(false);
+    }
+}
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+// You can call a function right where you're passing arguments to `assert!` -- so you could do
+// something like `assert!(having_fun())`. If you want to check that you indeed get false, you
+// can negate the result of what you're doing using `!`, like `assert!(!having_fun())`.
diff --git a/tests/tests4.rs b/tests/tests4.rs
new file mode 100644
index 0000000..278e29e
--- /dev/null
+++ b/tests/tests4.rs
@@ -0,0 +1,18 @@
+// This test isn't testing our function -- make it do that in such a way that
+// the test passes. Then write a second test that tests that we get the result
+// we expect to get when we call `times_two` with a negative number.
+// No hints, you can do this :)
+
+pub fn times_two(num: i32) -> i32 {
+    num * 2
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn returns_twice_of_positive_numbers() {
+        assert_eq!(4, 4);
+    }
+}
-- 
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